Refactored all the other classes to support multi user. Clearing the app data is required before launching the app.

app/src/main/java/Account/Account.java

@@ -58,6 +58,10 @@ public class Account {
         return accessToken;
     }
 
+    public void setAccessToken(String accessToken) {
+        this.accessToken = accessToken;
+    }
+
     public String getRefreshToken() {
         return refreshToken;
     }

app/src/main/java/Account/AccountDao.java

@@ -6,11 +6,19 @@ import androidx.room.Insert;
 import androidx.room.OnConflictStrategy;
 import androidx.room.Query;
 
+import java.util.List;
+
 @Dao
 public interface AccountDao {
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     void insert(Account account);
 
+    @Query("SELECT * FROM accounts WHERE is_current_user = 0")
+    List<Account> getAllNonCurrentAccounts();
+
+    @Query("UPDATE accounts SET is_current_user = 0 WHERE is_current_user = 1")
+    void markAllAccountsNonCurrent();
+
     @Query("DELETE FROM accounts")
     void deleteAllAccounts();
 
@@ -19,4 +27,7 @@ public interface AccountDao {
 
     @Query("SELECT * FROM accounts WHERE username = :userName COLLATE NOCASE LIMIT 1")
     Account getAccountData(String userName);
+
+    @Query("SELECT * FROM accounts WHERE is_current_user = 1 LIMIT 1")
+    Account getCurrentAccount();
 }

app/src/main/java/Account/AccountRepository.java

@@ -1,17 +1,17 @@
 package Account;
 
-import android.app.Application;
 import android.os.AsyncTask;
 
 import androidx.lifecycle.LiveData;
 
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
 public class AccountRepository {
     private AccountDao mAccountDao;
     private LiveData<Account> mAccountLiveData;
 
-    AccountRepository(Application application, String username) {
-        mAccountDao = AccountRoomDatabase.getDatabase(application).accountDao();
-
+    AccountRepository(RedditDataRoomDatabase redditDataRoomDatabase, String username) {
+        mAccountDao = redditDataRoomDatabase.accountDao();
         mAccountLiveData = mAccountDao.getAccountLiveData(username);
     }
 

app/src/main/java/Account/AccountRoomDatabase.java

@@ -1,27 +0,0 @@
-package Account;
-
-import android.content.Context;
-
-import androidx.room.Database;
-import androidx.room.Room;
-import androidx.room.RoomDatabase;
-
-@Database(entities = {Account.class}, version = 1)
-public abstract class AccountRoomDatabase extends RoomDatabase {
-    private static AccountRoomDatabase INSTANCE;
-
-    public abstract AccountDao accountDao();
-
-    public static AccountRoomDatabase getDatabase(final Context context) {
-        if(INSTANCE == null) {
-            synchronized (AccountRoomDatabase.class) {
-                if(INSTANCE == null) {
-                    INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
-                            AccountRoomDatabase.class, "accounts")
-                            .build();
-                }
-            }
-        }
-        return INSTANCE;
-    }
-}

app/src/main/java/Account/AccountViewModel.java

@@ -8,13 +8,15 @@ import androidx.lifecycle.LiveData;
 import androidx.lifecycle.ViewModel;
 import androidx.lifecycle.ViewModelProvider;
 
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
 public class AccountViewModel extends AndroidViewModel {
     private AccountRepository mAccountRepository;
     private LiveData<Account> mAccountLiveData;
 
-    public AccountViewModel(Application application, String id) {
+    public AccountViewModel(Application application, RedditDataRoomDatabase redditDataRoomDatabase, String id) {
         super(application);
-        mAccountRepository = new AccountRepository(application, id);
+        mAccountRepository = new AccountRepository(redditDataRoomDatabase, id);
         mAccountLiveData = mAccountRepository.getAccountLiveData();
     }
 
@@ -30,18 +32,19 @@ public class AccountViewModel extends AndroidViewModel {
 
         @NonNull
         private final Application mApplication;
+        private final RedditDataRoomDatabase mRedditDataRoomDatabase;
+        private final String mUsername;
 
-        private final String userName;
-
-        public Factory(@NonNull Application application, String userName) {
+        public Factory(@NonNull Application application, RedditDataRoomDatabase redditDataRoomDatabase, String username) {
             mApplication = application;
-            this.userName = userName;
+            mRedditDataRoomDatabase = redditDataRoomDatabase;
+            mUsername = username;
         }
 
         @Override
         public <T extends ViewModel> T create(Class<T> modelClass) {
             //noinspection unchecked
-            return (T) new AccountViewModel(mApplication, userName);
+            return (T) new AccountViewModel(mApplication, mRedditDataRoomDatabase, mUsername);
         }
     }
 }

app/src/main/java/SubredditDatabase/SubredditData.java

@@ -1,29 +1,49 @@
 package SubredditDatabase;
 
+import androidx.annotation.NonNull;
 import androidx.room.ColumnInfo;
 import androidx.room.Entity;
-import androidx.annotation.NonNull;
-
-import SubscribedSubredditDatabase.SubscribedSubredditData;
+import androidx.room.PrimaryKey;
 
 @Entity(tableName = "subreddits")
-public class SubredditData extends SubscribedSubredditData {
+public class SubredditData {
+    @PrimaryKey
+    @NonNull
+    @ColumnInfo(name = "id")
+    private String id;
+    @ColumnInfo(name = "name")
+    private String name;
+    @ColumnInfo(name = "icon")
+    private String iconUrl;
     @ColumnInfo(name = "banner")
     private String bannerUrl;
-
     @ColumnInfo(name = "description")
     private String description;
-
     @ColumnInfo(name = "subscribers_count")
     private int nSubscribers;
 
     public SubredditData(@NonNull String id, String name, String iconUrl, String bannerUrl, String description, int nSubscribers) {
-        super(id, name, iconUrl);
+        this.id = id;
+        this.name = name;
+        this.iconUrl = iconUrl;
         this.bannerUrl = bannerUrl;
         this.description = description;
         this.nSubscribers = nSubscribers;
     }
 
+    @NonNull
+    public String getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getIconUrl() {
+        return iconUrl;
+    }
+
     public String getBannerUrl() {
         return bannerUrl;
     }

app/src/main/java/SubredditDatabase/SubredditRepository.java

@@ -1,17 +1,17 @@
 package SubredditDatabase;
 
-import android.app.Application;
-import androidx.lifecycle.LiveData;
 import android.os.AsyncTask;
 
+import androidx.lifecycle.LiveData;
+
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
 public class SubredditRepository {
     private SubredditDao mSubredditDao;
     private LiveData<SubredditData> mSubredditLiveData;
 
-    SubredditRepository(Application application, String subredditName) {
-        SubredditRoomDatabase db = SubredditRoomDatabase.getDatabase(application);
-        mSubredditDao = db.subredditDao();
-
+    SubredditRepository(RedditDataRoomDatabase redditDataRoomDatabase, String subredditName) {
+        mSubredditDao = redditDataRoomDatabase.subredditDao();
         mSubredditLiveData = mSubredditDao.getSubredditLiveDataByName(subredditName);
     }
 

app/src/main/java/SubredditDatabase/SubredditRoomDatabase.java

@@ -1,26 +0,0 @@
-package SubredditDatabase;
-
-import androidx.room.Database;
-import androidx.room.Room;
-import androidx.room.RoomDatabase;
-import android.content.Context;
-
-@Database(entities = {SubredditData.class}, version = 1)
-public abstract class SubredditRoomDatabase extends RoomDatabase{
-    private static SubredditRoomDatabase INSTANCE;
-
-    public abstract SubredditDao subredditDao();
-
-    public static SubredditRoomDatabase getDatabase(final Context context) {
-        if(INSTANCE == null) {
-            synchronized (SubredditRoomDatabase.class) {
-                if(INSTANCE == null) {
-                    INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
-                            SubredditRoomDatabase.class, "subreddits")
-                            .build();
-                }
-            }
-        }
-        return INSTANCE;
-    }
-}

app/src/main/java/SubredditDatabase/SubredditViewModel.java

@@ -7,13 +7,15 @@ import androidx.lifecycle.ViewModel;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.annotation.NonNull;
 
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
 public class SubredditViewModel extends AndroidViewModel {
     private SubredditRepository mSubredditRepository;
     private LiveData<SubredditData> mSubredditLiveData;
 
-    public SubredditViewModel(Application application, String id) {
+    public SubredditViewModel(Application application, RedditDataRoomDatabase redditDataRoomDatabase, String id) {
         super(application);
-        mSubredditRepository = new SubredditRepository(application, id);
+        mSubredditRepository = new SubredditRepository(redditDataRoomDatabase, id);
         mSubredditLiveData = mSubredditRepository.getSubredditLiveData();
     }
 
@@ -29,19 +31,20 @@ public class SubredditViewModel extends AndroidViewModel {
 
         @NonNull
         private final Application mApplication;
+        private final RedditDataRoomDatabase mRedditDataRoomDatabase;
+        private final String mSubredditName;
 
-        private final String subredditName;
-
-        public Factory(@NonNull Application application, String subredditName) {
+        public Factory(@NonNull Application application, RedditDataRoomDatabase redditDataRoomDatabase, String subredditname) {
             mApplication = application;
-            this.subredditName = subredditName;
+            mRedditDataRoomDatabase = redditDataRoomDatabase;
+            mSubredditName = subredditname;
         }
 
         @NonNull
         @Override
         public <T extends ViewModel> T create(@NonNull Class<T> modelClass) {
             //noinspection unchecked
-            return (T) new SubredditViewModel(mApplication, subredditName);
+            return (T) new SubredditViewModel(mApplication, mRedditDataRoomDatabase, mSubredditName);
         }
     }
 }

app/src/main/java/SubscribedSubredditDatabase/SubscribedSubredditDao.java

@@ -16,12 +16,12 @@ public interface SubscribedSubredditDao {
     @Query("DELETE FROM subscribed_subreddits")
     void deleteAllSubscribedSubreddits();
 
-    @Query("SELECT * from subscribed_subreddits ORDER BY name COLLATE NOCASE ASC")
-    LiveData<List<SubscribedSubredditData>> getAllSubscribedSubreddits();
+    @Query("SELECT * from subscribed_subreddits WHERE username = :accountName ORDER BY name COLLATE NOCASE ASC")
+    LiveData<List<SubscribedSubredditData>> getAllSubscribedSubreddits(String accountName);
 
-    @Query("SELECT * from subscribed_subreddits WHERE name = :subredditName COLLATE NOCASE LIMIT 1")
-    SubscribedSubredditData getSubscribedSubreddit(String subredditName);
+    @Query("SELECT * from subscribed_subreddits WHERE name = :subredditName AND username = :accountName COLLATE NOCASE LIMIT 1")
+    SubscribedSubredditData getSubscribedSubreddit(String subredditName, String accountName);
 
-    @Query("DELETE FROM subscribed_subreddits WHERE name = :subredditName")
-    void deleteSubscribedSubreddit(String subredditName);
+    @Query("DELETE FROM subscribed_subreddits WHERE name = :subredditName AND username = :accountName")
+    void deleteSubscribedSubreddit(String subredditName, String accountName);
 }

app/src/main/java/SubscribedSubredditDatabase/SubscribedSubredditData.java

@@ -2,10 +2,14 @@ package SubscribedSubredditDatabase;
 
 import androidx.room.ColumnInfo;
 import androidx.room.Entity;
+import androidx.room.ForeignKey;
 import androidx.room.PrimaryKey;
 import androidx.annotation.NonNull;
 
-@Entity(tableName = "subscribed_subreddits")
+import Account.Account;
+
+@Entity(tableName = "subscribed_subreddits", foreignKeys = @ForeignKey(entity = Account.class, parentColumns = "username",
+        childColumns = "username", onDelete = ForeignKey.CASCADE))
 public class SubscribedSubredditData {
 
     @PrimaryKey
@@ -16,11 +20,14 @@ public class SubscribedSubredditData {
     private String name;
     @ColumnInfo(name = "icon")
     private String iconUrl;
+    @ColumnInfo(name = "username")
+    private String username;
 
-    public SubscribedSubredditData(@NonNull String id, String name, String iconUrl) {
+    public SubscribedSubredditData(@NonNull String id, String name, String iconUrl, String username) {
         this.id = id;
         this.name = name;
         this.iconUrl = iconUrl;
+        this.username = username;
     }
 
     @NonNull
@@ -35,4 +42,12 @@ public class SubscribedSubredditData {
     public String getIconUrl() {
         return iconUrl;
     }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getUsername() {
+        return username;
+    }
 }

app/src/main/java/SubscribedSubredditDatabase/SubscribedSubredditRepository.java

@@ -1,19 +1,20 @@
 package SubscribedSubredditDatabase;
 
-import android.app.Application;
-import androidx.lifecycle.LiveData;
 import android.os.AsyncTask;
 
+import androidx.lifecycle.LiveData;
+
 import java.util.List;
 
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
 public class SubscribedSubredditRepository {
     private SubscribedSubredditDao mSubscribedSubredditDao;
     private LiveData<List<SubscribedSubredditData>> mAllSubscribedSubreddits;
 
-    SubscribedSubredditRepository(Application application) {
-        SubscribedSubredditRoomDatabase db = SubscribedSubredditRoomDatabase.getDatabase(application);
-        mSubscribedSubredditDao = db.subscribedSubredditDao();
-        mAllSubscribedSubreddits = mSubscribedSubredditDao.getAllSubscribedSubreddits();
+    SubscribedSubredditRepository(RedditDataRoomDatabase redditDataRoomDatabase, String accountName) {
+        mSubscribedSubredditDao = redditDataRoomDatabase.subscribedSubredditDao();
+        mAllSubscribedSubreddits = mSubscribedSubredditDao.getAllSubscribedSubreddits(accountName);
     }
 
     LiveData<List<SubscribedSubredditData>> getAllSubscribedSubreddits() {

app/src/main/java/SubscribedSubredditDatabase/SubscribedSubredditRoomDatabase.java

@@ -1,26 +0,0 @@
-package SubscribedSubredditDatabase;
-
-import androidx.room.Database;
-import androidx.room.Room;
-import androidx.room.RoomDatabase;
-import android.content.Context;
-
-@Database(entities = {SubscribedSubredditData.class}, version = 1)
-public abstract class SubscribedSubredditRoomDatabase extends RoomDatabase {
-    private static SubscribedSubredditRoomDatabase INSTANCE;
-
-    public abstract SubscribedSubredditDao subscribedSubredditDao();
-
-    public static SubscribedSubredditRoomDatabase getDatabase(final Context context) {
-        if(INSTANCE == null) {
-            synchronized (SubscribedSubredditRoomDatabase.class) {
-                if(INSTANCE == null) {
-                    INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
-                            SubscribedSubredditRoomDatabase.class, "subscribed_subreddits")
-                            .build();
-                }
-            }
-        }
-        return INSTANCE;
-    }
-}

app/src/main/java/SubscribedSubredditDatabase/SubscribedSubredditViewModel.java

@@ -1,18 +1,24 @@
 package SubscribedSubredditDatabase;
 
 import android.app.Application;
+
+import androidx.annotation.NonNull;
 import androidx.lifecycle.AndroidViewModel;
 import androidx.lifecycle.LiveData;
+import androidx.lifecycle.ViewModel;
+import androidx.lifecycle.ViewModelProvider;
 
 import java.util.List;
 
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
 public class SubscribedSubredditViewModel extends AndroidViewModel {
     private SubscribedSubredditRepository mSubscribedSubredditRepository;
     private LiveData<List<SubscribedSubredditData>> mAllSubscribedSubreddits;
 
-    public SubscribedSubredditViewModel(Application application) {
+    public SubscribedSubredditViewModel(Application application, RedditDataRoomDatabase redditDataRoomDatabase, String accountName) {
         super(application);
-        mSubscribedSubredditRepository = new SubscribedSubredditRepository(application);
+        mSubscribedSubredditRepository = new SubscribedSubredditRepository(redditDataRoomDatabase, accountName);
         mAllSubscribedSubreddits = mSubscribedSubredditRepository.getAllSubscribedSubreddits();
     }
 
@@ -23,4 +29,22 @@ public class SubscribedSubredditViewModel extends AndroidViewModel {
     public void insert(SubscribedSubredditData subscribedSubredditData) {
         mSubscribedSubredditRepository.insert(subscribedSubredditData);
     }
+
+    public static class Factory extends ViewModelProvider.NewInstanceFactory {
+        private Application mApplication;
+        private RedditDataRoomDatabase mRedditDataRoomDatabase;
+        private String mAccountName;
+
+        public Factory(Application application, RedditDataRoomDatabase redditDataRoomDatabase, String accountName) {
+            this.mApplication = application;
+            this.mRedditDataRoomDatabase = redditDataRoomDatabase;
+            this.mAccountName = accountName;
+        }
+
+        @NonNull
+        @Override
+        public <T extends ViewModel> T create(@NonNull Class<T> modelClass) {
+            return (T) new SubscribedSubredditViewModel(mApplication, mRedditDataRoomDatabase, mAccountName);
+        }
+    }
 }

app/src/main/java/SubscribedUserDatabase/SubscribedUserDao.java

@@ -16,12 +16,12 @@ public interface SubscribedUserDao {
     @Query("DELETE FROM subscribed_users")
     void deleteAllSubscribedUsers();
 
-    @Query("SELECT * FROM subscribed_users ORDER BY name COLLATE NOCASE ASC")
-    LiveData<List<SubscribedUserData>> getAllSubscribedUsers();
+    @Query("SELECT * FROM subscribed_users WHERE username = :accountName ORDER BY name COLLATE NOCASE ASC")
+    LiveData<List<SubscribedUserData>> getAllSubscribedUsers(String accountName);
 
-    @Query("SELECT * FROM subscribed_users WHERE name = :userName COLLATE NOCASE LIMIT 1")
-    SubscribedUserData getSubscribedUser(String userName);
+    @Query("SELECT * FROM subscribed_users WHERE name = :name AND username = :accountName COLLATE NOCASE LIMIT 1")
+    SubscribedUserData getSubscribedUser(String name, String accountName);
 
-    @Query("DELETE FROM subscribed_users WHERE name = :userName")
-    void deleteSubscribedUser(String userName);
+    @Query("DELETE FROM subscribed_users WHERE name = :name AND username = :accountName")
+    void deleteSubscribedUser(String name, String accountName);
 }

app/src/main/java/SubscribedUserDatabase/SubscribedUserData.java

@@ -1,11 +1,15 @@
 package SubscribedUserDatabase;
 
+import androidx.annotation.NonNull;
 import androidx.room.ColumnInfo;
 import androidx.room.Entity;
+import androidx.room.ForeignKey;
 import androidx.room.PrimaryKey;
-import androidx.annotation.NonNull;
 
-@Entity(tableName = "subscribed_users")
+import Account.Account;
+
+@Entity(tableName = "subscribed_users", foreignKeys = @ForeignKey(entity = Account.class, parentColumns = "username",
+        childColumns = "username", onDelete = ForeignKey.CASCADE))
 public class SubscribedUserData {
     @PrimaryKey
     @NonNull
@@ -13,10 +17,13 @@ public class SubscribedUserData {
     private String name;
     @ColumnInfo(name = "icon")
     private String iconUrl;
+    @ColumnInfo(name = "username")
+    private String username;
 
-    public SubscribedUserData(@NonNull String name, String iconUrl) {
+    public SubscribedUserData(@NonNull String name, String iconUrl, String username) {
         this.name = name;
         this.iconUrl = iconUrl;
+        this.username = username;
     }
 
     @NonNull
@@ -27,4 +34,12 @@ public class SubscribedUserData {
     public String getIconUrl() {
         return iconUrl;
     }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getUsername() {
+        return username;
+    }
 }

app/src/main/java/SubscribedUserDatabase/SubscribedUserRepository.java

@@ -1,19 +1,20 @@
 package SubscribedUserDatabase;
 
-import android.app.Application;
-import androidx.lifecycle.LiveData;
 import android.os.AsyncTask;
 
+import androidx.lifecycle.LiveData;
+
 import java.util.List;
 
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
 public class SubscribedUserRepository {
     private SubscribedUserDao mSubscribedUserDao;
     private LiveData<List<SubscribedUserData>> mAllSubscribedUsers;
 
-    SubscribedUserRepository(Application application) {
-        SubscribedUserRoomDatabase db = SubscribedUserRoomDatabase.getDatabase(application);
-        mSubscribedUserDao = db.subscribedUserDao();
-        mAllSubscribedUsers = mSubscribedUserDao.getAllSubscribedUsers();
+    SubscribedUserRepository(RedditDataRoomDatabase redditDataRoomDatabase, String accountName) {
+        mSubscribedUserDao = redditDataRoomDatabase.subscribedUserDao();
+        mAllSubscribedUsers = mSubscribedUserDao.getAllSubscribedUsers(accountName);
     }
 
     LiveData<List<SubscribedUserData>> getAllSubscribedSubreddits() {

app/src/main/java/SubscribedUserDatabase/SubscribedUserRoomDatabase.java

@@ -1,26 +0,0 @@
-package SubscribedUserDatabase;
-
-import androidx.room.Database;
-import androidx.room.Room;
-import androidx.room.RoomDatabase;
-import android.content.Context;
-
-@Database(entities = {SubscribedUserData.class}, version = 1)
-public abstract class SubscribedUserRoomDatabase extends RoomDatabase {
-    private static SubscribedUserRoomDatabase INSTANCE;
-
-    public abstract SubscribedUserDao subscribedUserDao();
-
-    public static SubscribedUserRoomDatabase getDatabase(final Context context) {
-        if(INSTANCE == null) {
-            synchronized (SubscribedUserRoomDatabase.class) {
-                if(INSTANCE == null) {
-                    INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
-                            SubscribedUserRoomDatabase.class, "subscribed_users")
-                            .build();
-                }
-            }
-        }
-        return INSTANCE;
-    }
-}

app/src/main/java/SubscribedUserDatabase/SubscribedUserViewModel.java

@@ -1,18 +1,24 @@
 package SubscribedUserDatabase;
 
 import android.app.Application;
+
+import androidx.annotation.NonNull;
 import androidx.lifecycle.AndroidViewModel;
 import androidx.lifecycle.LiveData;
+import androidx.lifecycle.ViewModel;
+import androidx.lifecycle.ViewModelProvider;
 
 import java.util.List;
 
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
 public class SubscribedUserViewModel extends AndroidViewModel {
     private SubscribedUserRepository mSubscribedUserRepository;
     private LiveData<List<SubscribedUserData>> mAllSubscribedUsers;
 
-    public SubscribedUserViewModel(Application application) {
+    public SubscribedUserViewModel(Application application, RedditDataRoomDatabase redditDataRoomDatabase, String accountName) {
         super(application);
-        mSubscribedUserRepository = new SubscribedUserRepository(application);
+        mSubscribedUserRepository = new SubscribedUserRepository(redditDataRoomDatabase, accountName);
         mAllSubscribedUsers = mSubscribedUserRepository.getAllSubscribedSubreddits();
     }
 
@@ -23,4 +29,22 @@ public class SubscribedUserViewModel extends AndroidViewModel {
     public void insert(SubscribedUserData subscribedUserData) {
         mSubscribedUserRepository.insert(subscribedUserData);
     }
+
+    public static class Factory extends ViewModelProvider.NewInstanceFactory {
+        private Application mApplication;
+        private RedditDataRoomDatabase mRedditDataRoomDatabase;
+        private String mAccountName;
+
+        public Factory(Application application, RedditDataRoomDatabase redditDataRoomDatabase, String accountName) {
+            mApplication = application;
+            mRedditDataRoomDatabase = redditDataRoomDatabase;
+            mAccountName = accountName;
+        }
+
+        @NonNull
+        @Override
+        public <T extends ViewModel> T create(@NonNull Class<T> modelClass) {
+            return (T) new SubscribedUserViewModel(mApplication, mRedditDataRoomDatabase, mAccountName);
+        }
+    }
 }

app/src/main/java/User/UserData.java

@@ -1,13 +1,18 @@
 package User;
 
+import androidx.annotation.NonNull;
 import androidx.room.ColumnInfo;
 import androidx.room.Entity;
-import androidx.annotation.NonNull;
-
-import SubscribedUserDatabase.SubscribedUserData;
+import androidx.room.PrimaryKey;
 
 @Entity(tableName = "users")
-public class UserData extends SubscribedUserData {
+public class UserData {
+    @PrimaryKey
+    @NonNull
+    @ColumnInfo(name = "name")
+    private String name;
+    @ColumnInfo(name = "icon")
+    private String iconUrl;
     @ColumnInfo(name = "banner")
     private String banner;
     @ColumnInfo(name = "karma")
@@ -20,7 +25,8 @@ public class UserData extends SubscribedUserData {
     private boolean canBeFollowed;
 
     public UserData(@NonNull String name, String iconUrl, String banner, int karma, boolean isGold, boolean isFriend, boolean canBeFollowed) {
-        super(name, iconUrl);
+        this.name = name;
+        this.iconUrl = iconUrl;
         this.banner = banner;
         this.karma = karma;
         this.isGold = isGold;
@@ -28,6 +34,15 @@ public class UserData extends SubscribedUserData {
         this.canBeFollowed = canBeFollowed;
     }
 
+    @NonNull
+    public String getName() {
+        return name;
+    }
+
+    public String getIconUrl() {
+        return iconUrl;
+    }
+
     public String getBanner() {
         return banner;
     }

app/src/main/java/User/UserRepository.java

@@ -1,16 +1,17 @@
 package User;
 
-import android.app.Application;
-import androidx.lifecycle.LiveData;
 import android.os.AsyncTask;
 
+import androidx.lifecycle.LiveData;
+
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
 public class UserRepository {
     private UserDao mUserDao;
     private LiveData<UserData> mUserLiveData;
 
-    UserRepository(Application application, String userName) {
-        mUserDao = UserRoomDatabase.getDatabase(application).userDao();
-
+    UserRepository(RedditDataRoomDatabase redditDataRoomDatabase, String userName) {
+        mUserDao = redditDataRoomDatabase.userDao();
         mUserLiveData = mUserDao.getUserLiveData(userName);
     }
 

app/src/main/java/User/UserRoomDatabase.java

@@ -1,26 +0,0 @@
-package User;
-
-import androidx.room.Database;
-import androidx.room.Room;
-import androidx.room.RoomDatabase;
-import android.content.Context;
-
-@Database(entities = {UserData.class}, version = 1)
-public abstract class UserRoomDatabase extends RoomDatabase {
-    private static UserRoomDatabase INSTANCE;
-
-    public abstract UserDao userDao();
-
-    public static UserRoomDatabase getDatabase(final Context context) {
-        if(INSTANCE == null) {
-            synchronized (UserRoomDatabase.class) {
-                if(INSTANCE == null) {
-                    INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
-                            UserRoomDatabase.class, "users")
-                            .build();
-                }
-            }
-        }
-        return INSTANCE;
-    }
-}

app/src/main/java/User/UserViewModel.java

@@ -7,13 +7,15 @@ import androidx.lifecycle.ViewModel;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.annotation.NonNull;
 
+import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+
 public class UserViewModel extends AndroidViewModel {
     private UserRepository mSubredditRepository;
     private LiveData<UserData> mUserLiveData;
 
-    public UserViewModel(Application application, String id) {
+    public UserViewModel(Application application, RedditDataRoomDatabase redditDataRoomDatabase, String id) {
         super(application);
-        mSubredditRepository = new UserRepository(application, id);
+        mSubredditRepository = new UserRepository(redditDataRoomDatabase, id);
         mUserLiveData = mSubredditRepository.getUserLiveData();
     }
 
@@ -29,18 +31,19 @@ public class UserViewModel extends AndroidViewModel {
 
         @NonNull
         private final Application mApplication;
+        private final RedditDataRoomDatabase mRedditDataRoomDatabase;
+        private final String mUsername;
 
-        private final String userName;
-
-        public Factory(@NonNull Application application, String userName) {
+        public Factory(@NonNull Application application, RedditDataRoomDatabase redditDataRoomDatabase, String username) {
             mApplication = application;
-            this.userName = userName;
+            mRedditDataRoomDatabase = redditDataRoomDatabase;
+            mUsername = username;
         }
 
         @Override
         public <T extends ViewModel> T create(Class<T> modelClass) {
             //noinspection unchecked
-            return (T) new UserViewModel(mApplication, userName);
+            return (T) new UserViewModel(mApplication, mRedditDataRoomDatabase, mUsername);
         }
     }
 }

app/src/main/java/ml/docilealligator/infinityforreddit/AccessTokenAuthenticator.java

@@ -1,8 +1,10 @@
 package ml.docilealligator.infinityforreddit;
 
-import android.content.SharedPreferences;
 import android.util.Log;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
 import org.json.JSONException;
 import org.json.JSONObject;
 
@@ -10,8 +12,7 @@ import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
 
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
+import Account.Account;
 import okhttp3.Authenticator;
 import okhttp3.Headers;
 import okhttp3.Request;
@@ -22,37 +23,38 @@ import retrofit2.Retrofit;
 
 class AccessTokenAuthenticator implements Authenticator {
     private Retrofit mRetrofit;
-    private SharedPreferences mAuthInfoSharedPreferences;
+    private RedditDataRoomDatabase mRedditDataRoomDatabase;
 
-    AccessTokenAuthenticator(Retrofit retrofit, SharedPreferences authInfoSharedPreferences) {
+    AccessTokenAuthenticator(Retrofit retrofit, RedditDataRoomDatabase accountRoomDatabase) {
         mRetrofit = retrofit;
-        mAuthInfoSharedPreferences = authInfoSharedPreferences;
+        mRedditDataRoomDatabase = accountRoomDatabase;
     }
 
     @Nullable
     @Override
-    public Request authenticate(@NonNull Route route, @NonNull Response response) {
+    public Request authenticate(Route route, @NonNull Response response) {
         if (response.code() == 401) {
             String accessToken = response.request().header(RedditUtils.AUTHORIZATION_KEY).substring(RedditUtils.AUTHORIZATION_BASE.length());
             synchronized (this) {
-                String accessTokenFromSharedPreferences = mAuthInfoSharedPreferences.getString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, "");
-                if (accessToken.equals(accessTokenFromSharedPreferences)) {
-                    String newAccessToken = refreshAccessToken();
+                Account account = mRedditDataRoomDatabase.accountDao().getCurrentAccount();
+                String accessTokenFromDatabase = account.getAccessToken();
+                if (accessToken.equals(accessTokenFromDatabase)) {
+                    String newAccessToken = refreshAccessToken(account);
                     if (!newAccessToken.equals("")) {
                         return response.request().newBuilder().headers(Headers.of(RedditUtils.getOAuthHeader(newAccessToken))).build();
                     } else {
                         return null;
                     }
                 } else {
-                    return response.request().newBuilder().headers(Headers.of(RedditUtils.getOAuthHeader(accessTokenFromSharedPreferences))).build();
+                    return response.request().newBuilder().headers(Headers.of(RedditUtils.getOAuthHeader(accessTokenFromDatabase))).build();
                 }
             }
         }
         return null;
     }
 
-    private String refreshAccessToken() {
-        String refreshToken = mAuthInfoSharedPreferences.getString(SharedPreferencesUtils.REFRESH_TOKEN_KEY, "");
+    private String refreshAccessToken(Account account) {
+        String refreshToken = mRedditDataRoomDatabase.accountDao().getCurrentAccount().getRefreshToken();
 
         RedditAPI api = mRetrofit.create(RedditAPI.class);
 
@@ -63,11 +65,14 @@ class AccessTokenAuthenticator implements Authenticator {
         Call<String> accessTokenCall = api.getAccessToken(RedditUtils.getHttpBasicAuthHeader(), params);
         try {
             retrofit2.Response response = accessTokenCall.execute();
+            if(response.body() == null) {
+                return "";
+            }
+
             JSONObject jsonObject = new JSONObject((String) response.body());
-
             String newAccessToken = jsonObject.getString(RedditUtils.ACCESS_TOKEN_KEY);
-
-            mAuthInfoSharedPreferences.edit().putString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, newAccessToken).apply();
+            account.setAccessToken(newAccessToken);
+            mRedditDataRoomDatabase.accountDao().insert(account);
 
             Log.i("access token", newAccessToken);
             return newAccessToken;

app/src/main/java/ml/docilealligator/infinityforreddit/AppComponent.java

@@ -26,4 +26,8 @@ interface AppComponent {
     void inject(RulesActivity rulesActivity);
     void inject(CommentsListingFragment commentsListingFragment);
     void inject(SubmitPostService submitPostService);
+    void inject(FilteredPostsActivity filteredPostsActivity);
+    void inject(SearchResultActivity searchResultActivity);
+    void inject(SearchSubredditsResultActivity searchSubredditsResultActivity);
+    void inject(FollowedUsersListingFragment followedUsersListingFragment);
 }

app/src/main/java/ml/docilealligator/infinityforreddit/AppModule.java

@@ -60,9 +60,9 @@ class AppModule {
 
     @Provides
     @Singleton
-    OkHttpClient provideOkHttpClient(@Named("no_oauth") Retrofit retrofit, @Named("auth_info") SharedPreferences sharedPreferences) {
+    OkHttpClient provideOkHttpClient(@Named("no_oauth") Retrofit retrofit, RedditDataRoomDatabase accountRoomDatabase) {
         OkHttpClient.Builder okHttpClientBuilder = new OkHttpClient.Builder();
-        okHttpClientBuilder.authenticator(new AccessTokenAuthenticator(retrofit, sharedPreferences));
+        okHttpClientBuilder.authenticator(new AccessTokenAuthenticator(retrofit, accountRoomDatabase));
         return okHttpClientBuilder.build();
     }
 
@@ -76,4 +76,10 @@ class AppModule {
     SharedPreferences provideUserInfoSharedPreferences() {
         return mApplication.getSharedPreferences(SharedPreferencesUtils.USER_INFO_FILE_KEY, Context.MODE_PRIVATE);
     }
+
+    @Provides
+    @Singleton
+    RedditDataRoomDatabase provideRedditDataRoomDatabase() {
+        return RedditDataRoomDatabase.getDatabase(mApplication);
+    }
 }

app/src/main/java/ml/docilealligator/infinityforreddit/CheckIsFollowingUserAsyncTask.java

@@ -7,7 +7,8 @@ import SubscribedUserDatabase.SubscribedUserData;
 
 public class CheckIsFollowingUserAsyncTask extends AsyncTask<Void, Void, Void> {
     private SubscribedUserDao subscribedUserDao;
-    private String userName;
+    private String username;
+    private String accountName;
     private SubscribedUserData subscribedUserData;
     private CheckIsFollowingUserListener checkIsFollowingUserListener;
 
@@ -16,16 +17,17 @@ public class CheckIsFollowingUserAsyncTask extends AsyncTask<Void, Void, Void> {
         void isNotSubscribed();
     }
 
-    CheckIsFollowingUserAsyncTask(SubscribedUserDao subscribedUserDao, String userName,
+    CheckIsFollowingUserAsyncTask(SubscribedUserDao subscribedUserDao, String username, String accountName,
                                   CheckIsFollowingUserListener checkIsFollowingUserListener) {
         this.subscribedUserDao = subscribedUserDao;
-        this.userName = userName;
+        this.username = username;
+        this.accountName = accountName;
         this.checkIsFollowingUserListener = checkIsFollowingUserListener;
     }
 
     @Override
     protected Void doInBackground(Void... voids) {
-        subscribedUserData = subscribedUserDao.getSubscribedUser(userName);
+        subscribedUserData = subscribedUserDao.getSubscribedUser(username, accountName);
         return null;
     }
 

app/src/main/java/ml/docilealligator/infinityforreddit/CheckIsSubscribedToSubredditAsyncTask.java

@@ -9,6 +9,7 @@ class CheckIsSubscribedToSubredditAsyncTask extends AsyncTask<Void, Void, Void>
 
     private SubscribedSubredditDao subscribedSubredditDao;
     private String subredditName;
+    private String accountName;
     private SubscribedSubredditData subscribedSubredditData;
     private CheckIsSubscribedToSubredditListener checkIsSubscribedToSubredditListener;
 
@@ -17,16 +18,18 @@ class CheckIsSubscribedToSubredditAsyncTask extends AsyncTask<Void, Void, Void>
         void isNotSubscribed();
     }
 
-    CheckIsSubscribedToSubredditAsyncTask(SubscribedSubredditDao subscribedSubredditDao, String subredditName,
+    CheckIsSubscribedToSubredditAsyncTask(SubscribedSubredditDao subscribedSubredditDao,
+                                          String subredditName, String accountName,
                                           CheckIsSubscribedToSubredditListener checkIsSubscribedToSubredditListener) {
         this.subscribedSubredditDao = subscribedSubredditDao;
         this.subredditName =subredditName;
+        this.accountName = accountName;
         this.checkIsSubscribedToSubredditListener = checkIsSubscribedToSubredditListener;
     }
 
     @Override
     protected Void doInBackground(Void... voids) {
-        subscribedSubredditData = subscribedSubredditDao.getSubscribedSubreddit(subredditName);
+        subscribedSubredditData = subscribedSubredditDao.getSubscribedSubreddit(subredditName, accountName);
         return null;
     }
 

app/src/main/java/ml/docilealligator/infinityforreddit/CommentAndPostRecyclerViewAdapter.java

@@ -2,7 +2,6 @@ package ml.docilealligator.infinityforreddit;
 
 import android.app.Activity;
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.graphics.ColorFilter;
 import android.graphics.PorterDuff;
 import android.graphics.drawable.Drawable;
@@ -40,8 +39,6 @@ import java.util.Locale;
 
 import CustomView.AspectRatioGifImageView;
 import CustomView.CustomMarkwonView;
-import SubredditDatabase.SubredditRoomDatabase;
-import User.UserRoomDatabase;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.BlurTransformation;
@@ -61,8 +58,9 @@ class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVie
     private Activity mActivity;
     private Retrofit mRetrofit;
     private Retrofit mOauthRetrofit;
+    private RedditDataRoomDatabase mRedditDataRoomDatabase;
     private RequestManager mGlide;
-    private SharedPreferences mSharedPreferences;
+    private String mAccessToken;
     private Post mPost;
     private ArrayList<CommentData> mVisibleComments;
     private String mSubredditNamePrefixed;
@@ -79,15 +77,17 @@ class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVie
         void retryFetchingMoreComments();
     }
 
-    CommentAndPostRecyclerViewAdapter(Activity activity, Retrofit retrofit, Retrofit oauthRetrofit, RequestManager glide,
-                                      SharedPreferences sharedPreferences, Post post, String subredditNamePrefixed,
+    CommentAndPostRecyclerViewAdapter(Activity activity, Retrofit retrofit, Retrofit oauthRetrofit,
+                                      RedditDataRoomDatabase redditDataRoomDatabase, RequestManager glide,
+                                      String accessToken, Post post, String subredditNamePrefixed,
                                       Locale locale, LoadSubredditIconAsyncTask loadSubredditIconAsyncTask,
                                       CommentRecyclerViewAdapterCallback commentRecyclerViewAdapterCallback) {
         mActivity = activity;
         mRetrofit = retrofit;
         mOauthRetrofit = oauthRetrofit;
+        mRedditDataRoomDatabase = redditDataRoomDatabase;
         mGlide = glide;
-        mSharedPreferences = sharedPreferences;
+        mAccessToken = accessToken;
         mPost = post;
         mVisibleComments = new ArrayList<>();
         mSubredditNamePrefixed = subredditNamePrefixed;
@@ -164,7 +164,7 @@ class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVie
 
             if(mPost.getSubredditNamePrefixed().equals("u/" + mPost.getAuthor())) {
                 if(mPost.getAuthorIconUrl() == null) {
-                    new LoadUserDataAsyncTask(UserRoomDatabase.getDatabase(mActivity).userDao(), mPost.getAuthor(), mOauthRetrofit, iconImageUrl -> {
+                    new LoadUserDataAsyncTask(mRedditDataRoomDatabase.userDao(), mPost.getAuthor(), mOauthRetrofit, iconImageUrl -> {
                         if(mActivity != null && getItemCount() > 0) {
                             if(iconImageUrl == null || iconImageUrl.equals("")) {
                                 mGlide.load(R.drawable.subreddit_default_icon)
@@ -200,7 +200,7 @@ class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVie
                         mLoadSubredditIconAsyncTask.cancel(true);
                     }
                     mLoadSubredditIconAsyncTask = new LoadSubredditIconAsyncTask(
-                            SubredditRoomDatabase.getDatabase(mActivity).subredditDao(), mPost.getSubredditNamePrefixed().substring(2),
+                            mRedditDataRoomDatabase.subredditDao(), mPost.getSubredditNamePrefixed().substring(2),
                             mRetrofit, iconImageUrl -> {
                                 if(iconImageUrl == null || iconImageUrl.equals("")) {
                                     mGlide.load(R.drawable.subreddit_default_icon)
@@ -749,7 +749,7 @@ class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVie
 
                 mCommentRecyclerViewAdapterCallback.updatePost(mPost);
 
-                VoteThing.voteThing(mOauthRetrofit, mSharedPreferences, new VoteThing.VoteThingWithoutPositionListener() {
+                VoteThing.voteThing(mOauthRetrofit, mAccessToken, new VoteThing.VoteThingWithoutPositionListener() {
                     @Override
                     public void onVoteThingSuccess() {
                         if(newVoteType.equals(RedditUtils.DIR_UPVOTE)) {
@@ -808,7 +808,7 @@ class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVie
 
                 mCommentRecyclerViewAdapterCallback.updatePost(mPost);
 
-                VoteThing.voteThing(mOauthRetrofit, mSharedPreferences, new VoteThing.VoteThingWithoutPositionListener() {
+                VoteThing.voteThing(mOauthRetrofit, mAccessToken, new VoteThing.VoteThingWithoutPositionListener() {
                     @Override
                     public void onVoteThingSuccess() {
                         if(newVoteType.equals(RedditUtils.DIR_DOWNVOTE)) {
@@ -911,7 +911,7 @@ class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVie
 
                 scoreTextView.setText(Integer.toString(mVisibleComments.get(getAdapterPosition() - 1).getScore() + mVisibleComments.get(getAdapterPosition() - 1).getVoteType()));
 
-                VoteThing.voteThing(mOauthRetrofit, mSharedPreferences, new VoteThing.VoteThingListener() {
+                VoteThing.voteThing(mOauthRetrofit, mAccessToken, new VoteThing.VoteThingListener() {
                     @Override
                     public void onVoteThingSuccess(int position) {
                         if(newVoteType.equals(RedditUtils.DIR_UPVOTE)) {
@@ -951,7 +951,7 @@ class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVie
 
                 scoreTextView.setText(Integer.toString(mVisibleComments.get(getAdapterPosition() - 1).getScore() + mVisibleComments.get(getAdapterPosition() - 1).getVoteType()));
 
-                VoteThing.voteThing(mOauthRetrofit, mSharedPreferences, new VoteThing.VoteThingListener() {
+                VoteThing.voteThing(mOauthRetrofit, mAccessToken, new VoteThing.VoteThingListener() {
                     @Override
                     public void onVoteThingSuccess(int position1) {
                         if(newVoteType.equals(RedditUtils.DIR_DOWNVOTE)) {

app/src/main/java/ml/docilealligator/infinityforreddit/CommentsListingFragment.java

@@ -3,7 +3,6 @@ package ml.docilealligator.infinityforreddit;
 
 import android.app.Activity;
 import android.content.Context;
-import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -37,6 +36,7 @@ import retrofit2.Retrofit;
 public class CommentsListingFragment extends Fragment implements FragmentCommunicator {
 
     static final String EXTRA_USERNAME_KEY = "ENK";
+    static final String EXTRA_ACCESS_TOKEN = "EAT";
 
     @BindView(R.id.coordinator_layout_comments_listing_fragment) CoordinatorLayout mCoordinatorLayout;
     @BindView(R.id.recycler_view_comments_listing_fragment) RecyclerView mCommentRecyclerView;
@@ -60,9 +60,6 @@ public class CommentsListingFragment extends Fragment implements FragmentCommuni
     @Inject @Named("oauth")
     Retrofit mOauthRetrofit;
 
-    @Inject @Named("auth_info")
-    SharedPreferences mSharedPreferences;
-
     public CommentsListingFragment() {
         // Required empty public constructor
     }
@@ -83,7 +80,7 @@ public class CommentsListingFragment extends Fragment implements FragmentCommuni
 
         CommentViewModel.Factory factory;
         mAdapter = new CommentsListingRecyclerViewAdapter(activity, mOauthRetrofit,
-                mSharedPreferences, () -> mCommentViewModel.retryLoadingMore());
+                getArguments().getString(EXTRA_ACCESS_TOKEN), () -> mCommentViewModel.retryLoadingMore());
 
         String username = getArguments().getString(EXTRA_USERNAME_KEY);
 

app/src/main/java/ml/docilealligator/infinityforreddit/CommentsListingRecyclerViewAdapter.java

@@ -2,7 +2,6 @@ package ml.docilealligator.infinityforreddit;
 
 import android.content.Context;
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -28,9 +27,9 @@ import retrofit2.Retrofit;
 class CommentsListingRecyclerViewAdapter extends PagedListAdapter<CommentData, RecyclerView.ViewHolder> {
     private Context mContext;
     private Retrofit mOauthRetrofit;
-    private SharedPreferences mSharedPreferences;
-    private int textColorPrimaryDark;
-    private int colorAccent;
+    private String mAccessToken;
+    private int mTextColorPrimaryDark;
+    private int mColorAccent;
 
     private static final int VIEW_TYPE_DATA = 0;
     private static final int VIEW_TYPE_ERROR = 1;
@@ -43,15 +42,15 @@ class CommentsListingRecyclerViewAdapter extends PagedListAdapter<CommentData, R
         void retryLoadingMore();
     }
 
-    protected CommentsListingRecyclerViewAdapter(Context context, Retrofit oauthRetrofit, SharedPreferences sharedPreferences,
+    protected CommentsListingRecyclerViewAdapter(Context context, Retrofit oauthRetrofit, String accessToken,
                                                  RetryLoadingMoreCallback retryLoadingMoreCallback) {
         super(DIFF_CALLBACK);
         mContext = context;
         mOauthRetrofit = oauthRetrofit;
-        mSharedPreferences = sharedPreferences;
+        mAccessToken = accessToken;
         mRetryLoadingMoreCallback = retryLoadingMoreCallback;
-        textColorPrimaryDark = mContext.getResources().getColor(R.color.textColorPrimaryDark);
-        colorAccent = mContext.getResources().getColor(R.color.colorAccent);
+        mTextColorPrimaryDark = mContext.getResources().getColor(R.color.textColorPrimaryDark);
+        mColorAccent = mContext.getResources().getColor(R.color.colorAccent);
     }
 
     private static final DiffUtil.ItemCallback<CommentData> DIFF_CALLBACK = new DiffUtil.ItemCallback<CommentData>() {
@@ -88,7 +87,7 @@ class CommentsListingRecyclerViewAdapter extends PagedListAdapter<CommentData, R
 
             if(comment.getAuthor().equals(comment.getSubredditName().substring(2))) {
                 ((DataViewHolder) holder).authorTextView.setText("u/" + comment.getAuthor());
-                ((DataViewHolder) holder).authorTextView.setTextColor(textColorPrimaryDark);
+                ((DataViewHolder) holder).authorTextView.setTextColor(mTextColorPrimaryDark);
                 ((DataViewHolder) holder).authorTextView.setOnClickListener(view -> {
                     Intent intent = new Intent(mContext, ViewUserDetailActivity.class);
                     intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY, comment.getAuthor());
@@ -96,7 +95,7 @@ class CommentsListingRecyclerViewAdapter extends PagedListAdapter<CommentData, R
                 });
             } else {
                 ((DataViewHolder) holder).authorTextView.setText("r/" + comment.getSubredditName());
-                ((DataViewHolder) holder).authorTextView.setTextColor(colorAccent);
+                ((DataViewHolder) holder).authorTextView.setTextColor(mColorAccent);
                 ((DataViewHolder) holder).authorTextView.setOnClickListener(view -> {
                     Intent intent = new Intent(mContext, ViewSubredditDetailActivity.class);
                     intent.putExtra(ViewSubredditDetailActivity.EXTRA_SUBREDDIT_NAME_KEY, comment.getSubredditName());
@@ -225,7 +224,7 @@ class CommentsListingRecyclerViewAdapter extends PagedListAdapter<CommentData, R
 
                 scoreTextView.setText(Integer.toString(getItem(getAdapterPosition()).getScore() + getItem(getAdapterPosition()).getVoteType()));
 
-                VoteThing.voteThing(mOauthRetrofit, mSharedPreferences, new VoteThing.VoteThingListener() {
+                VoteThing.voteThing(mOauthRetrofit, mAccessToken, new VoteThing.VoteThingListener() {
                     @Override
                     public void onVoteThingSuccess(int position) {
                         if(newVoteType.equals(RedditUtils.DIR_UPVOTE)) {
@@ -265,7 +264,7 @@ class CommentsListingRecyclerViewAdapter extends PagedListAdapter<CommentData, R
 
                 scoreTextView.setText(Integer.toString(getItem(getAdapterPosition()).getScore() + getItem(getAdapterPosition()).getVoteType()));
 
-                VoteThing.voteThing(mOauthRetrofit, mSharedPreferences, new VoteThing.VoteThingListener() {
+                VoteThing.voteThing(mOauthRetrofit, mAccessToken, new VoteThing.VoteThingListener() {
                     @Override
                     public void onVoteThingSuccess(int position1) {
                         if(newVoteType.equals(RedditUtils.DIR_DOWNVOTE)) {

app/src/main/java/ml/docilealligator/infinityforreddit/FetchMyInfo.java

@@ -1,6 +1,5 @@
 package ml.docilealligator.infinityforreddit;
 
-import android.content.SharedPreferences;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
@@ -16,31 +15,6 @@ class FetchMyInfo {
         void onFetchMyInfoFail();
     }
 
-    static void fetchMyInfo(final Retrofit retrofit, SharedPreferences authInfoSharedPreferences,
-                            final FetchUserMyListener fetchUserMyListener) {
-        RedditAPI api = retrofit.create(RedditAPI.class);
-
-        String accessToken = authInfoSharedPreferences.getString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, "");
-        Call<String> userInfo = api.getMyInfo(RedditUtils.getOAuthHeader(accessToken));
-        userInfo.enqueue(new Callback<String>() {
-            @Override
-            public void onResponse(@NonNull Call<String> call, @NonNull retrofit2.Response<String> response) {
-                if(response.isSuccessful()) {
-                    fetchUserMyListener.onFetchMyInfoSuccess(response.body());
-                } else {
-                    Log.i("call failed", response.message());
-                    fetchUserMyListener.onFetchMyInfoFail();
-                }
-            }
-
-            @Override
-            public void onFailure(@NonNull Call<String> call, @NonNull Throwable t) {
-                Log.i("call failed", t.getMessage());
-                fetchUserMyListener.onFetchMyInfoFail();
-            }
-        });
-    }
-
     static void fetchMyInfo(final Retrofit retrofit, String accessToken,
                             final FetchUserMyListener fetchUserMyListener) {
         RedditAPI api = retrofit.create(RedditAPI.class);

app/src/main/java/ml/docilealligator/infinityforreddit/FetchSubscribedThing.java

@@ -1,9 +1,9 @@
 package ml.docilealligator.infinityforreddit;
 
-import android.content.SharedPreferences;
-import androidx.annotation.NonNull;
 import android.util.Log;
 
+import androidx.annotation.NonNull;
+
 import java.util.ArrayList;
 
 import SubredditDatabase.SubredditData;
@@ -22,23 +22,20 @@ class FetchSubscribedThing {
         void onFetchSubscribedThingFail();
     }
 
-    static void fetchSubscribedThing(final Retrofit retrofit, final SharedPreferences sharedPreferences,
-                                     final String lastItem,
-                                     final ArrayList<SubscribedSubredditData> subscribedSubredditData,
+    static void fetchSubscribedThing(final Retrofit retrofit, String accessToken, String accountName,
+                                     final String lastItem, final ArrayList<SubscribedSubredditData> subscribedSubredditData,
                                      final ArrayList<SubscribedUserData> subscribedUserData,
                                      final ArrayList<SubredditData> subredditData,
                                      final FetchSubscribedThingListener fetchSubscribedThingListener) {
         RedditAPI api = retrofit.create(RedditAPI.class);
 
-        String accessToken = sharedPreferences.getString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, "");
-
         Call<String> subredditDataCall = api.getSubscribedThing(lastItem, RedditUtils.getOAuthHeader(accessToken));
         subredditDataCall.enqueue(new Callback<String>() {
             @Override
             public void onResponse(@NonNull Call<String> call, @NonNull Response<String> response) {
                 if(response.isSuccessful()) {
-                    ParseSubscribedThing.parseSubscribedSubreddits(response.body(), subscribedSubredditData,
-                            subscribedUserData, subredditData,
+                    ParseSubscribedThing.parseSubscribedSubreddits(response.body(), accountName,
+                            subscribedSubredditData, subscribedUserData, subredditData,
                             new ParseSubscribedThing.ParseSubscribedSubredditsListener() {
 
                                 @Override
@@ -50,8 +47,8 @@ class FetchSubscribedThing {
                                         fetchSubscribedThingListener.onFetchSubscribedThingSuccess(
                                                 subscribedSubredditData, subscribedUserData, subredditData);
                                     } else {
-                                        fetchSubscribedThing(retrofit, sharedPreferences, lastItem, subscribedSubredditData,
-                                                subscribedUserData, subredditData,
+                                        fetchSubscribedThing(retrofit, accessToken, accountName, lastItem,
+                                                subscribedSubredditData, subscribedUserData, subredditData,
                                                 fetchSubscribedThingListener);
                                     }
                                 }

app/src/main/java/ml/docilealligator/infinityforreddit/FilteredPostsActivity.java

@@ -9,6 +9,8 @@ import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.Fragment;
 
+import javax.inject.Inject;
+
 import butterknife.BindView;
 import butterknife.ButterKnife;
 
@@ -21,10 +23,14 @@ public class FilteredPostsActivity extends AppCompatActivity implements SortType
     static final String EXTRA_POST_TYPE = "EPT";
     static final String EXTRA_SORT_TYPE = "EST";
 
+    private static final String NULL_ACCESS_TOKEN_STATE = "NATS";
+    private static final String ACCESS_TOKEN_STATE = "ATS";
     private static final String FRAGMENT_OUT_STATE = "FOS";
 
     @BindView(R.id.toolbar_filtered_posts_activity) Toolbar toolbar;
 
+    private boolean mNullAccessToken = false;
+    private String mAccessToken;
     private String name;
     private int postType;
 
@@ -35,6 +41,9 @@ public class FilteredPostsActivity extends AppCompatActivity implements SortType
     private SortTypeBottomSheetFragment subredditSortTypeBottomSheetFragment;
     private SearchPostSortTypeBottomSheetFragment searchPostSortTypeBottomSheetFragment;
 
+    @Inject
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -42,14 +51,43 @@ public class FilteredPostsActivity extends AppCompatActivity implements SortType
 
         ButterKnife.bind(this);
 
+        ((Infinity) getApplication()).getmAppComponent().inject(this);
+
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
         name = getIntent().getExtras().getString(EXTRA_NAME);
-        int filter = getIntent().getExtras().getInt(EXTRA_FILTER);
         postType = getIntent().getExtras().getInt(EXTRA_POST_TYPE);
+        int filter = getIntent().getExtras().getInt(EXTRA_FILTER);
         String sortType = getIntent().getExtras().getString(EXTRA_SORT_TYPE);
 
+        if(savedInstanceState != null) {
+            mNullAccessToken = savedInstanceState.getBoolean(NULL_ACCESS_TOKEN_STATE);
+            mAccessToken = savedInstanceState.getString(ACCESS_TOKEN_STATE);
+            if(!mNullAccessToken && mAccessToken == null) {
+                getCurrentAccountAndBindView(filter, sortType);
+            } else {
+                mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE);
+                getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_filtered_posts_activity, mFragment).commit();
+                bindView(filter, sortType, false);
+            }
+        } else {
+            getCurrentAccountAndBindView(filter, sortType);
+        }
+    }
+
+    private void getCurrentAccountAndBindView(int filter, String sortType) {
+        new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
+            if(account == null) {
+                mNullAccessToken = true;
+            } else {
+                mAccessToken = account.getAccessToken();
+            }
+            bindView(filter, sortType, true);
+        }).execute();
+    }
+
+    private void bindView(int filter, String sortType, boolean initializeFragment) {
         switch (postType) {
             case PostDataSource.TYPE_FRONT_PAGE:
                 getSupportActionBar().setTitle(name);
@@ -108,21 +146,19 @@ public class FilteredPostsActivity extends AppCompatActivity implements SortType
                 toolbar.setSubtitle(R.string.gif);
         }
 
-        if(savedInstanceState == null) {
+        if(initializeFragment) {
             mFragment = new PostFragment();
             Bundle bundle = new Bundle();
             bundle.putString(PostFragment.EXTRA_NAME, name);
             bundle.putInt(PostFragment.EXTRA_POST_TYPE, postType);
             bundle.putString(PostFragment.EXTRA_SORT_TYPE, sortType);
             bundle.putInt(PostFragment.EXTRA_FILTER, filter);
+            bundle.putString(PostFragment.EXTRA_ACCESS_TOKEN, mAccessToken);
             if(postType == PostDataSource.TYPE_SEARCH) {
                 bundle.putString(PostFragment.EXTRA_QUERY, getIntent().getExtras().getString(EXTRA_QUERY));
             }
             mFragment.setArguments(bundle);
             getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_filtered_posts_activity, mFragment).commit();
-        } else {
-            mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE);
-            getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_filtered_posts_activity, mFragment).commit();
         }
     }
 
@@ -170,6 +206,7 @@ public class FilteredPostsActivity extends AppCompatActivity implements SortType
         if (mFragment != null) {
             getSupportFragmentManager().putFragment(outState, FRAGMENT_OUT_STATE, mFragment);
         }
+        outState.putString(ACCESS_TOKEN_STATE, mAccessToken);
     }
 
     @Override

app/src/main/java/ml/docilealligator/infinityforreddit/FollowedUsersListingFragment.java

@@ -17,6 +17,8 @@ import androidx.recyclerview.widget.RecyclerView;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
 
+import javax.inject.Inject;
+
 import SubscribedUserDatabase.SubscribedUserViewModel;
 import butterknife.BindView;
 import butterknife.ButterKnife;
@@ -27,6 +29,8 @@ import butterknife.ButterKnife;
  */
 public class FollowedUsersListingFragment extends Fragment {
 
+    static final String EXTRA_ACCOUNT_NAME = "EAN";
+
     @BindView(R.id.recycler_view_followed_users_listing_fragment) RecyclerView mRecyclerView;
     @BindView(R.id.no_subscriptions_linear_layout_followed_users_listing_fragment) LinearLayout mLinearLayout;
     @BindView(R.id.no_subscriptions_image_view_followed_users_listing_fragment) ImageView mImageView;
@@ -41,6 +45,8 @@ public class FollowedUsersListingFragment extends Fragment {
         // Required empty public constructor
     }
 
+    @Inject
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
@@ -51,13 +57,17 @@ public class FollowedUsersListingFragment extends Fragment {
 
         mActivity = getActivity();
 
+        ((Infinity) mActivity.getApplication()).getmAppComponent().inject(this);
+
         mGlide = Glide.with(this);
 
         mRecyclerView.setLayoutManager(new LinearLayoutManager(mActivity));
         FollowedUsersRecyclerViewAdapter adapter = new FollowedUsersRecyclerViewAdapter(mActivity);
         mRecyclerView.setAdapter(adapter);
 
-        mSubscribedUserViewModel = ViewModelProviders.of(this).get(SubscribedUserViewModel.class);
+        mSubscribedUserViewModel = ViewModelProviders.of(this,
+                new SubscribedUserViewModel.Factory(mActivity.getApplication(), mRedditDataRoomDatabase, getArguments().getString(EXTRA_ACCOUNT_NAME)))
+                .get(SubscribedUserViewModel.class);
         mSubscribedUserViewModel.getAllSubscribedUsers().observe(this, subscribedUserData -> {
             if (subscribedUserData == null || subscribedUserData.size() == 0) {
                 mRecyclerView.setVisibility(View.GONE);

app/src/main/java/ml/docilealligator/infinityforreddit/GetCurrentAccountAsyncTask.java

@@ -0,0 +1,33 @@
+package ml.docilealligator.infinityforreddit;
+
+import android.os.AsyncTask;
+
+import Account.Account;
+import Account.AccountDao;
+
+class GetCurrentAccountAsyncTask extends AsyncTask<Void, Void, Void> {
+
+    interface GetCurrentAccountAsyncTaskListener {
+        void success(Account account);
+    }
+
+    Account account;
+    AccountDao accountDao;
+    GetCurrentAccountAsyncTaskListener getCurrentAccountAsyncTaskListener;
+
+    GetCurrentAccountAsyncTask(AccountDao accountDao, GetCurrentAccountAsyncTaskListener getCurrentAccountAsyncTaskListener) {
+        this.accountDao = accountDao;
+        this.getCurrentAccountAsyncTaskListener = getCurrentAccountAsyncTaskListener;
+    }
+
+    @Override
+    protected Void doInBackground(Void... voids) {
+        account = accountDao.getCurrentAccount();
+        return null;
+    }
+
+    @Override
+    protected void onPostExecute(Void aVoid) {
+        getCurrentAccountAsyncTaskListener.success(account);
+    }
+}

app/src/main/java/ml/docilealligator/infinityforreddit/LoginActivity.java

@@ -1,9 +1,7 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.app.Activity;
-import android.content.Context;
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.graphics.Bitmap;
 import android.net.Uri;
 import android.os.Bundle;
@@ -24,7 +22,6 @@ import java.util.Map;
 import javax.inject.Inject;
 import javax.inject.Named;
 
-import Account.AccountRoomDatabase;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -42,6 +39,9 @@ public class LoginActivity extends AppCompatActivity {
     @Named("oauth")
     Retrofit mOauthRetrofit;
 
+    @Inject
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -75,10 +75,6 @@ public class LoginActivity extends AppCompatActivity {
                     if(state.equals(RedditUtils.STATE)) {
                         authCode = uri.getQueryParameter("code");
 
-                        SharedPreferences.Editor editor = getSharedPreferences(SharedPreferencesUtils.AUTH_CODE_FILE_KEY, Context.MODE_PRIVATE).edit();
-                        editor.putString(SharedPreferencesUtils.AUTH_CODE_KEY, authCode);
-                        editor.apply();
-
                         Map<String, String> params = new HashMap<>();
                         params.put(RedditUtils.GRANT_TYPE_KEY, "authorization_code");
                         params.put("code", authCode);
@@ -107,8 +103,8 @@ public class LoginActivity extends AppCompatActivity {
                                                 ParseMyInfo.parseMyInfo(response, new ParseMyInfo.ParseMyInfoListener() {
                                                     @Override
                                                     public void onParseMyInfoSuccess(String name, String profileImageUrl, String bannerImageUrl, int karma) {
-                                                        new ParseAndInsertAccount(name, accessToken, refreshToken, profileImageUrl, bannerImageUrl,
-                                                                karma, authCode, AccountRoomDatabase.getDatabase(LoginActivity.this).accountDao(),
+                                                        new ParseAndInsertNewAccountAsyncTask(name, accessToken, refreshToken, profileImageUrl, bannerImageUrl,
+                                                                karma, authCode, mRedditDataRoomDatabase.accountDao(),
                                                                 () -> {
                                                                     Intent resultIntent = new Intent();
                                                                     setResult(Activity.RESULT_OK, resultIntent);

app/src/main/java/ml/docilealligator/infinityforreddit/MainActivity.java

@@ -1,7 +1,6 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.app.Activity;
-import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
@@ -48,6 +47,8 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
 
     private static final String FETCH_USER_INFO_STATE = "FUIS";
     private static final String IS_IN_LAZY_MODE_STATE = "IILMS";
+    private static final String NULL_ACCESS_TOKEN_STATE = "NATS";
+    private static final String ACCESS_TOKEN_STATE = "ATS";
 
     private static final int LOGIN_ACTIVITY_REQUEST_CODE = 0;
 
@@ -73,6 +74,8 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
     private SortTypeBottomSheetFragment bestSortTypeBottomSheetFragment;
     private SortTypeBottomSheetFragment popularAndAllSortTypeBottomSheetFragment;
 
+    private boolean mNullAccessToken = false;
+    private String mAccessToken;
     private String mName;
     private String mProfileImageUrl;
     private String mBannerImageUrl;
@@ -87,14 +90,13 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
     @Named("user_info")
     SharedPreferences mUserInfoSharedPreferences;
 
-    @Inject
-    @Named("auth_info")
-    SharedPreferences mAuthInfoSharedPreferences;
-
     @Inject
     @Named("oauth")
     Retrofit mOauthRetrofit;
 
+    @Inject
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -127,85 +129,105 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
 
         params = (AppBarLayout.LayoutParams) collapsingToolbarLayout.getLayoutParams();
 
-        sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
-        viewPager.setAdapter(sectionsPagerAdapter);
-        viewPager.setOffscreenPageLimit(2);
-        tabLayout.setupWithViewPager(viewPager);
-
-        String accessToken = getSharedPreferences(SharedPreferencesUtils.AUTH_CODE_FILE_KEY, Context.MODE_PRIVATE).getString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, "");
-        if (accessToken.equals("")) {
-            Intent loginIntent = new Intent(this, LoginActivity.class);
-            startActivityForResult(loginIntent, LOGIN_ACTIVITY_REQUEST_CODE);
+        if(savedInstanceState != null) {
+            mFetchUserInfoSuccess = savedInstanceState.getBoolean(FETCH_USER_INFO_STATE);
+            isInLazyMode = savedInstanceState.getBoolean(IS_IN_LAZY_MODE_STATE);
+            mNullAccessToken = savedInstanceState.getBoolean(NULL_ACCESS_TOKEN_STATE);
+            mAccessToken = savedInstanceState.getString(ACCESS_TOKEN_STATE);
+            if(!mNullAccessToken && mAccessToken == null) {
+                getCurrentAccountAndBindView();
+            } else {
+                bindView();
+            }
         } else {
-            if (savedInstanceState != null) {
-                mFetchUserInfoSuccess = savedInstanceState.getBoolean(FETCH_USER_INFO_STATE);
-                isInLazyMode = savedInstanceState.getBoolean(IS_IN_LAZY_MODE_STATE);
-            } else {
-                if(getIntent().hasExtra(EXTRA_POST_TYPE)) {
-                    if(getIntent().getExtras().getString(EXTRA_POST_TYPE).equals("popular")) {
-                        viewPager.setCurrentItem(1);
-                    } else {
-                        viewPager.setCurrentItem(2);
-                    }
-                }
-            }
-
-            glide = Glide.with(this);
-
-            View header = findViewById(R.id.nav_header_main_activity);
-            mNameTextView = header.findViewById(R.id.name_text_view_nav_header_main);
-            mKarmaTextView = header.findViewById(R.id.karma_text_view_nav_header_main);
-            mProfileImageView = header.findViewById(R.id.profile_image_view_nav_header_main);
-            mBannerImageView = header.findViewById(R.id.banner_image_view_nav_header_main);
-
-            loadUserData();
-
-            mName = mUserInfoSharedPreferences.getString(SharedPreferencesUtils.USER_KEY, "");
-            mProfileImageUrl = mUserInfoSharedPreferences.getString(SharedPreferencesUtils.PROFILE_IMAGE_URL_KEY, "");
-            mBannerImageUrl = mUserInfoSharedPreferences.getString(SharedPreferencesUtils.BANNER_IMAGE_URL_KEY, "");
-            mKarma = mUserInfoSharedPreferences.getString(SharedPreferencesUtils.KARMA_KEY, "");
-
-            mNameTextView.setText(mName);
-            mKarmaTextView.setText(mKarma);
-
-            if (!mProfileImageUrl.equals("")) {
-                glide.load(mProfileImageUrl)
-                        .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(144, 0)))
-                        .error(glide.load(R.drawable.subreddit_default_icon)
-                                .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(144, 0))))
-                        .into(mProfileImageView);
-            } else {
-                glide.load(R.drawable.subreddit_default_icon)
-                        .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(144, 0)))
-                        .into(mProfileImageView);
-            }
-
-            if (!mBannerImageUrl.equals("")) {
-                glide.load(mBannerImageUrl).into(mBannerImageView);
-            }
-
-            profileLinearLayout.setOnClickListener(view -> {
-                Intent intent = new Intent(this, ViewUserDetailActivity.class);
-                intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY, mName);
-                startActivity(intent);
-            });
-
-            subscriptionLinearLayout.setOnClickListener(view -> {
-                Intent intent = new Intent(this, SubscribedThingListingActivity.class);
-                startActivity(intent);
-            });
-
-            settingsLinearLayout.setOnClickListener(view -> {
-
-            });
+            getCurrentAccountAndBindView();
         }
 
         fab.setOnClickListener(view -> postTypeBottomSheetFragment.show(getSupportFragmentManager(), postTypeBottomSheetFragment.getTag()));
     }
 
-    private void loadUserData() {
+    private void getCurrentAccountAndBindView() {
+        new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
+            if(account == null) {
+                Intent loginIntent = new Intent(this, LoginActivity.class);
+                startActivityForResult(loginIntent, LOGIN_ACTIVITY_REQUEST_CODE);
+            } else {
+                mAccessToken = account.getAccessToken();
+                if(mAccessToken == null) {
+                    mNullAccessToken = true;
+                }
+                bindView();
+            }
+        }).execute();
+    }
+
+    private void bindView() {
+        sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
+        viewPager.setAdapter(sectionsPagerAdapter);
+        viewPager.setOffscreenPageLimit(2);
+        tabLayout.setupWithViewPager(viewPager);
+
+        if(getIntent().hasExtra(EXTRA_POST_TYPE)) {
+            if(getIntent().getExtras().getString(EXTRA_POST_TYPE).equals("popular")) {
+                viewPager.setCurrentItem(1);
+            } else {
+                viewPager.setCurrentItem(2);
+            }
+        }
+
+        glide = Glide.with(this);
+
+        View header = findViewById(R.id.nav_header_main_activity);
+        mNameTextView = header.findViewById(R.id.name_text_view_nav_header_main);
+        mKarmaTextView = header.findViewById(R.id.karma_text_view_nav_header_main);
+        mProfileImageView = header.findViewById(R.id.profile_image_view_nav_header_main);
+        mBannerImageView = header.findViewById(R.id.banner_image_view_nav_header_main);
+
+        loadUserData(mAccessToken);
+
+        mName = mUserInfoSharedPreferences.getString(SharedPreferencesUtils.USER_KEY, "");
+        mProfileImageUrl = mUserInfoSharedPreferences.getString(SharedPreferencesUtils.PROFILE_IMAGE_URL_KEY, "");
+        mBannerImageUrl = mUserInfoSharedPreferences.getString(SharedPreferencesUtils.BANNER_IMAGE_URL_KEY, "");
+        mKarma = mUserInfoSharedPreferences.getString(SharedPreferencesUtils.KARMA_KEY, "");
+
+        mNameTextView.setText(mName);
+        mKarmaTextView.setText(mKarma);
+
+        if (!mProfileImageUrl.equals("")) {
+            glide.load(mProfileImageUrl)
+                    .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(144, 0)))
+                    .error(glide.load(R.drawable.subreddit_default_icon)
+                            .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(144, 0))))
+                    .into(mProfileImageView);
+        } else {
+            glide.load(R.drawable.subreddit_default_icon)
+                    .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(144, 0)))
+                    .into(mProfileImageView);
+        }
+
+        if (!mBannerImageUrl.equals("")) {
+            glide.load(mBannerImageUrl).into(mBannerImageView);
+        }
+
+        profileLinearLayout.setOnClickListener(view -> {
+            Intent intent = new Intent(this, ViewUserDetailActivity.class);
+            intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY, mName);
+            startActivity(intent);
+        });
+
+        subscriptionLinearLayout.setOnClickListener(view -> {
+            Intent intent = new Intent(this, SubscribedThingListingActivity.class);
+            startActivity(intent);
+        });
+
+        settingsLinearLayout.setOnClickListener(view -> {
+
+        });
+    }
+
+    private void loadUserData(String accessToken) {
         if (!mFetchUserInfoSuccess) {
-            FetchMyInfo.fetchMyInfo(mOauthRetrofit, mAuthInfoSharedPreferences, new FetchMyInfo.FetchUserMyListener() {
+            FetchMyInfo.fetchMyInfo(mOauthRetrofit, accessToken, new FetchMyInfo.FetchUserMyListener() {
                 @Override
                 public void onFetchMyInfoSuccess(String response) {
                     ParseMyInfo.parseMyInfo(response, new ParseMyInfo.ParseMyInfoListener() {
@@ -306,7 +328,7 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
             case R.id.action_refresh_main_activity:
                 sectionsPagerAdapter.refresh(viewPager.getCurrentItem());
                 mFetchUserInfoSuccess = false;
-                loadUserData();
+                loadUserData(mAccessToken);
                 return true;
             case R.id.action_lazy_mode_main_activity:
                 /*MenuItem lazyModeItem = mMenu.findItem(R.id.action_lazy_mode_main_activity);
@@ -343,6 +365,8 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
         super.onSaveInstanceState(outState);
         outState.putBoolean(FETCH_USER_INFO_STATE, mFetchUserInfoSuccess);
         outState.putBoolean(IS_IN_LAZY_MODE_STATE, isInLazyMode);
+        outState.putBoolean(NULL_ACCESS_TOKEN_STATE, mNullAccessToken);
+        outState.putString(ACCESS_TOKEN_STATE, mAccessToken);
     }
 
     @Override
@@ -390,6 +414,7 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
                 bundle.putInt(PostFragment.EXTRA_POST_TYPE, PostDataSource.TYPE_FRONT_PAGE);
                 bundle.putString(PostFragment.EXTRA_SORT_TYPE, PostDataSource.SORT_TYPE_BEST);
                 bundle.putInt(PostFragment.EXTRA_FILTER, PostFragment.EXTRA_NO_FILTER);
+                bundle.putString(PostFragment.EXTRA_ACCESS_TOKEN, mAccessToken);
                 fragment.setArguments(bundle);
                 return fragment;
             } else if(position == 1) {
@@ -399,6 +424,7 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
                 bundle.putString(PostFragment.EXTRA_NAME, "popular");
                 bundle.putString(PostFragment.EXTRA_SORT_TYPE, PostDataSource.SORT_TYPE_HOT);
                 bundle.putInt(PostFragment.EXTRA_FILTER, PostFragment.EXTRA_NO_FILTER);
+                bundle.putString(PostFragment.EXTRA_ACCESS_TOKEN, mAccessToken);
                 fragment.setArguments(bundle);
                 return fragment;
             } else {
@@ -408,6 +434,7 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
                 bundle.putString(PostFragment.EXTRA_NAME, "all");
                 bundle.putString(PostFragment.EXTRA_SORT_TYPE, PostDataSource.SORT_TYPE_HOT);
                 bundle.putInt(PostFragment.EXTRA_FILTER, PostFragment.EXTRA_NO_FILTER);
+                bundle.putString(PostFragment.EXTRA_ACCESS_TOKEN, mAccessToken);
                 fragment.setArguments(bundle);
                 return fragment;
             }

app/src/main/java/ml/docilealligator/infinityforreddit/ParseAndInsertNewAccountAsyncTask.java

@@ -5,7 +5,7 @@ import android.os.AsyncTask;
 import Account.Account;
 import Account.AccountDao;
 
-class ParseAndInsertAccount extends AsyncTask<Void, Void, Void> {
+class ParseAndInsertNewAccountAsyncTask extends AsyncTask<Void, Void, Void> {
 
     interface ParseAndInsertAccountListener {
         void success();
@@ -21,9 +21,9 @@ class ParseAndInsertAccount extends AsyncTask<Void, Void, Void> {
     private AccountDao accountDao;
     private ParseAndInsertAccountListener parseAndInsertAccountListener;
 
-    ParseAndInsertAccount(String username, String accessToken, String refreshToken, String profileImageUrl, String bannerImageUrl,
-                          int karma, String code, AccountDao accountDao,
-                          ParseAndInsertAccountListener parseAndInsertAccountListener) {
+    ParseAndInsertNewAccountAsyncTask(String username, String accessToken, String refreshToken, String profileImageUrl, String bannerImageUrl,
+                                      int karma, String code, AccountDao accountDao,
+                                      ParseAndInsertAccountListener parseAndInsertAccountListener) {
         this.username = username;
         this.accessToken = accessToken;
         this.refreshToken = refreshToken;
@@ -39,6 +39,7 @@ class ParseAndInsertAccount extends AsyncTask<Void, Void, Void> {
     protected Void doInBackground(Void... voids) {
         Account account = new Account(username, accessToken, refreshToken, code, profileImageUrl,
                 bannerImageUrl, karma, true);
+        accountDao.markAllAccountsNonCurrent();
         accountDao.insert(account);
         return null;
     }

app/src/main/java/ml/docilealligator/infinityforreddit/ParseSubscribedThing.java

@@ -22,16 +22,18 @@ class ParseSubscribedThing {
         void onParseSubscribedSubredditsFail();
     }
 
-    static void parseSubscribedSubreddits(String response, ArrayList<SubscribedSubredditData> subscribedSubredditData,
-                                   ArrayList<SubscribedUserData> subscribedUserData,
-                                   ArrayList<SubredditData> subredditData,
-                                   ParseSubscribedSubredditsListener parseSubscribedSubredditsListener) {
-        new ParseSubscribedSubredditsAsyncTask(response, subscribedSubredditData, subscribedUserData, subredditData,
+    static void parseSubscribedSubreddits(String response, String accountName,
+                                          ArrayList<SubscribedSubredditData> subscribedSubredditData,
+                                          ArrayList<SubscribedUserData> subscribedUserData,
+                                          ArrayList<SubredditData> subredditData,
+                                          ParseSubscribedSubredditsListener parseSubscribedSubredditsListener) {
+        new ParseSubscribedSubredditsAsyncTask(response, accountName, subscribedSubredditData, subscribedUserData, subredditData,
                 parseSubscribedSubredditsListener).execute();
     }
 
     private static class ParseSubscribedSubredditsAsyncTask extends AsyncTask<Void, Void, Void> {
         private JSONObject jsonResponse;
+        private String accountName;
         private boolean parseFailed;
         private String lastItem;
         private ArrayList<SubscribedSubredditData> subscribedSubredditData;
@@ -42,12 +44,13 @@ class ParseSubscribedThing {
         private ArrayList<SubredditData> newSubredditData;
         private ParseSubscribedSubredditsListener parseSubscribedSubredditsListener;
 
-        ParseSubscribedSubredditsAsyncTask(String response, ArrayList<SubscribedSubredditData> subscribedSubredditData,
+        ParseSubscribedSubredditsAsyncTask(String response, String accountName, ArrayList<SubscribedSubredditData> subscribedSubredditData,
                                            ArrayList<SubscribedUserData> subscribedUserData,
                                            ArrayList<SubredditData> subredditData,
                                            ParseSubscribedSubredditsListener parseSubscribedSubredditsListener){
             try {
                 jsonResponse = new JSONObject(response);
+                this.accountName = accountName;
                 parseFailed = false;
                 this.subscribedSubredditData = subscribedSubredditData;
                 this.subscribedUserData = subscribedUserData;
@@ -94,12 +97,12 @@ class ParseSubscribedThing {
                     if(data.getString(JSONUtils.SUBREDDIT_TYPE_KEY)
                             .equals(JSONUtils.SUBREDDIT_TYPE_VALUE_USER)) {
                         //It's a user
-                        newSubscribedUserData.add(new SubscribedUserData(name.substring(2), iconUrl));
+                        newSubscribedUserData.add(new SubscribedUserData(name.substring(2), iconUrl, accountName));
                     } else {
                         String subredditFullName = data.getString(JSONUtils.DISPLAY_NAME);
                         String description = data.getString(JSONUtils.PUBLIC_DESCRIPTION_KEY).trim();
                         int nSubscribers = data.getInt(JSONUtils.SUBSCRIBERS_KEY);
-                        newSubscribedSubredditData.add(new SubscribedSubredditData(id, name, iconUrl));
+                        newSubscribedSubredditData.add(new SubscribedSubredditData(id, name, iconUrl, accountName));
                         newSubredditData.add(new SubredditData(id, subredditFullName, iconUrl, bannerImageUrl, description, nSubscribers));
                     }
                 }

app/src/main/java/ml/docilealligator/infinityforreddit/PostFragment.java

@@ -4,7 +4,6 @@ package ml.docilealligator.infinityforreddit;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.os.CountDownTimer;
 import android.os.Handler;
@@ -53,6 +52,7 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
     static final String EXTRA_SORT_TYPE = "EST";
     static final String EXTRA_FILTER = "EF";
     static final int EXTRA_NO_FILTER = -1;
+    static final String EXTRA_ACCESS_TOKEN = "EAT";
 
     private static final String IS_IN_LAZY_MODE_STATE = "IILMS";
 
@@ -87,8 +87,8 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
     @Inject @Named("oauth")
     Retrofit mOauthRetrofit;
 
-    @Inject @Named("auth_info")
-    SharedPreferences mSharedPreferences;
+    @Inject
+    RedditDataRoomDatabase redditDataRoomDatabase;
 
     public PostFragment() {
         // Required empty public constructor
@@ -173,9 +173,7 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
         int postType = getArguments().getInt(EXTRA_POST_TYPE);
         String sortType = getArguments().getString(EXTRA_SORT_TYPE);
         int filter = getArguments().getInt(EXTRA_FILTER);
-
-        String accessToken = activity.getSharedPreferences(SharedPreferencesUtils.AUTH_CODE_FILE_KEY, Context.MODE_PRIVATE)
-                .getString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, "");
+        String accessToken = getArguments().getString(EXTRA_ACCESS_TOKEN);
 
         PostViewModel.Factory factory;
 
@@ -183,8 +181,8 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
             String subredditName = getArguments().getString(EXTRA_NAME);
             String query = getArguments().getString(EXTRA_QUERY);
 
-            mAdapter = new PostRecyclerViewAdapter(activity, mOauthRetrofit, mRetrofit,
-                    mSharedPreferences, postType, true, new PostRecyclerViewAdapter.Callback() {
+            mAdapter = new PostRecyclerViewAdapter(activity, mOauthRetrofit, mRetrofit, redditDataRoomDatabase,
+                    accessToken, postType, true, new PostRecyclerViewAdapter.Callback() {
                 @Override
                 public void retryLoadingMore() {
                     mPostViewModel.retryLoadingMore();
@@ -221,8 +219,8 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
             String subredditName = getArguments().getString(EXTRA_NAME);
 
             boolean displaySubredditName = subredditName.equals("popular") || subredditName.equals("all");
-            mAdapter = new PostRecyclerViewAdapter(activity, mOauthRetrofit, mRetrofit,
-                    mSharedPreferences, postType, displaySubredditName, new PostRecyclerViewAdapter.Callback() {
+            mAdapter = new PostRecyclerViewAdapter(activity, mOauthRetrofit, mRetrofit, redditDataRoomDatabase,
+                    accessToken, postType, displaySubredditName, new PostRecyclerViewAdapter.Callback() {
                 @Override
                 public void retryLoadingMore() {
                     mPostViewModel.retryLoadingMore();
@@ -261,8 +259,8 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
 
             String username = getArguments().getString(EXTRA_USER_NAME);
 
-            mAdapter = new PostRecyclerViewAdapter(activity, mOauthRetrofit, mRetrofit,
-                    mSharedPreferences, postType, true, new PostRecyclerViewAdapter.Callback() {
+            mAdapter = new PostRecyclerViewAdapter(activity, mOauthRetrofit, mRetrofit, redditDataRoomDatabase,
+                    accessToken, postType, true, new PostRecyclerViewAdapter.Callback() {
                 @Override
                 public void retryLoadingMore() {
                     mPostViewModel.retryLoadingMore();
@@ -296,8 +294,8 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
                 }
             });
         } else {
-            mAdapter = new PostRecyclerViewAdapter(activity, mOauthRetrofit, mRetrofit,
-                    mSharedPreferences, postType, true, new PostRecyclerViewAdapter.Callback() {
+            mAdapter = new PostRecyclerViewAdapter(activity, mOauthRetrofit, mRetrofit, redditDataRoomDatabase,
+                    accessToken, postType, true, new PostRecyclerViewAdapter.Callback() {
                 @Override
                 public void retryLoadingMore() {
                     mPostViewModel.retryLoadingMore();

app/src/main/java/ml/docilealligator/infinityforreddit/PostImageActivity.java

@@ -1,7 +1,6 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
@@ -39,7 +38,6 @@ import java.io.IOException;
 import javax.inject.Inject;
 import javax.inject.Named;
 
-import SubredditDatabase.SubredditRoomDatabase;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.RoundedCornersTransformation;
@@ -110,12 +108,7 @@ public class PostImageActivity extends AppCompatActivity implements FlairBottomS
     Retrofit mUploadMediaRetrofit;
 
     @Inject
-    @Named("user_info")
-    SharedPreferences mUserInfoSharedPreferences;
-
-    @Inject
-    @Named("auth_info")
-    SharedPreferences sharedPreferences;
+    RedditDataRoomDatabase redditDataRoomDatabase;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -299,7 +292,7 @@ public class PostImageActivity extends AppCompatActivity implements FlairBottomS
     }
 
     private void loadSubredditIcon() {
-        new LoadSubredditIconAsyncTask(SubredditRoomDatabase.getDatabase(this).subredditDao(),
+        new LoadSubredditIconAsyncTask(redditDataRoomDatabase.subredditDao(),
                 subredditName, mRetrofit, iconImageUrl -> {
             iconUrl = iconImageUrl;
             displaySubredditIcon();
@@ -441,11 +434,13 @@ public class PostImageActivity extends AppCompatActivity implements FlairBottomS
     public void onSubmitImagePostEvent(SubmitImagePostEvent submitImagePostEvent) {
         isPosting = false;
         if(submitImagePostEvent.postSuccess) {
-            Intent intent = new Intent(this, ViewUserDetailActivity.class);
-            intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY,
-                    mUserInfoSharedPreferences.getString(SharedPreferencesUtils.USER_KEY, ""));
-            startActivity(intent);
-            finish();
+            new GetCurrentAccountAsyncTask(redditDataRoomDatabase.accountDao(), account -> {
+                Intent intent = new Intent(PostImageActivity.this, ViewUserDetailActivity.class);
+                intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY,
+                        account.getUsername());
+                startActivity(intent);
+                finish();
+            }).execute();
         } else {
             mPostingSnackbar.dismiss();
             mMemu.getItem(R.id.action_send_post_image_activity).setEnabled(true);

app/src/main/java/ml/docilealligator/infinityforreddit/PostLinkActivity.java

@@ -1,7 +1,6 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -28,7 +27,6 @@ import org.greenrobot.eventbus.Subscribe;
 import javax.inject.Inject;
 import javax.inject.Named;
 
-import SubredditDatabase.SubredditRoomDatabase;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.RoundedCornersTransformation;
@@ -48,6 +46,8 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
     private static final String FLAIR_STATE = "FS";
     private static final String IS_SPOILER_STATE = "ISS";
     private static final String IS_NSFW_STATE = "INS";
+    private static final String NULL_ACCOUNT_NAME_STATE = "NATS";
+    private static final String ACCOUNT_NAME_STATE = "ANS";
 
     private static final int SUBREDDIT_SELECTION_REQUEST_CODE = 0;
 
@@ -62,6 +62,8 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
     @BindView(R.id.post_title_edit_text_post_link_activity) EditText titleEditText;
     @BindView(R.id.post_link_edit_text_post_link_activity) EditText contentEditText;
 
+    private boolean mNullAccountName = false;
+    private String mAccountName;
     private String iconUrl;
     private String subredditName;
     private boolean subredditSelected = false;
@@ -87,8 +89,7 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
     Retrofit mOauthRetrofit;
 
     @Inject
-    @Named("auth_info")
-    SharedPreferences sharedPreferences;
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -215,6 +216,16 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
         });
     }
 
+    private void getCurrentAccountName() {
+        new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
+            if(account == null) {
+                mNullAccountName = true;
+            } else {
+                mAccountName = account.getUsername();
+            }
+        }).execute();
+    }
+
     private void displaySubredditIcon() {
         if(iconUrl != null && !iconUrl.equals("")) {
             mGlide.load(iconUrl)
@@ -230,7 +241,7 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
     }
 
     private void loadSubredditIcon() {
-        new LoadSubredditIconAsyncTask(SubredditRoomDatabase.getDatabase(this).subredditDao(),
+        new LoadSubredditIconAsyncTask(mRedditDataRoomDatabase.subredditDao(),
                 subredditName, mRetrofit, iconImageUrl -> {
             iconUrl = iconImageUrl;
             displaySubredditIcon();
@@ -304,6 +315,8 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
         outState.putString(FLAIR_STATE, flair);
         outState.putBoolean(IS_SPOILER_STATE, isSpoiler);
         outState.putBoolean(IS_NSFW_STATE, isNSFW);
+        outState.putBoolean(NULL_ACCOUNT_NAME_STATE, mNullAccountName);
+        outState.putString(ACCOUNT_NAME_STATE, mAccountName);
     }
 
     @Override

app/src/main/java/ml/docilealligator/infinityforreddit/PostRecyclerViewAdapter.java

@@ -2,7 +2,6 @@ package ml.docilealligator.infinityforreddit;
 
 import android.content.Context;
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.graphics.ColorFilter;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
@@ -43,9 +42,7 @@ import org.greenrobot.eventbus.EventBus;
 
 import CustomView.AspectRatioGifImageView;
 import SubredditDatabase.SubredditDao;
-import SubredditDatabase.SubredditRoomDatabase;
 import User.UserDao;
-import User.UserRoomDatabase;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.BlurTransformation;
@@ -60,20 +57,20 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
     private Context mContext;
     private Retrofit mOauthRetrofit;
     private Retrofit mRetrofit;
-    private SharedPreferences mSharedPreferences;
-    private RequestManager glide;
-    private SubredditDao subredditDao;
-    private UserDao userDao;
+    private String mAccessToken;
+    private RequestManager mGlide;
+    private SubredditDao mSubredditDao;
+    private UserDao mUserDao;
     private boolean canStartActivity = true;
-    private int postType;
-    private boolean displaySubredditName;
+    private int mPostType;
+    private boolean mDisplaySubredditName;
 
     private static final int VIEW_TYPE_DATA = 0;
     private static final int VIEW_TYPE_ERROR = 1;
     private static final int VIEW_TYPE_LOADING = 2;
 
     private NetworkState networkState;
-    private Callback callback;
+    private Callback mCallback;
 
     interface Callback {
         void retryLoadingMore();
@@ -81,20 +78,21 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
     }
 
     PostRecyclerViewAdapter(Context context, Retrofit oauthRetrofit, Retrofit retrofit,
-                            SharedPreferences sharedPreferences, int postType,
+                            RedditDataRoomDatabase redditDataRoomDatabase,
+                            String accessToken, int postType,
                             boolean displaySubredditName, Callback callback) {
         super(DIFF_CALLBACK);
         if(context != null) {
             mContext = context;
             mOauthRetrofit = oauthRetrofit;
             mRetrofit = retrofit;
-            mSharedPreferences = sharedPreferences;
-            this.postType = postType;
-            this.displaySubredditName = displaySubredditName;
-            glide = Glide.with(mContext.getApplicationContext());
-            subredditDao = SubredditRoomDatabase.getDatabase(mContext.getApplicationContext()).subredditDao();
-            userDao = UserRoomDatabase.getDatabase(mContext.getApplicationContext()).userDao();
-            this.callback = callback;
+            mAccessToken = accessToken;
+            mPostType = postType;
+            mDisplaySubredditName = displaySubredditName;
+            mGlide = Glide.with(mContext.getApplicationContext());
+            mSubredditDao = redditDataRoomDatabase.subredditDao();
+            mUserDao = redditDataRoomDatabase.userDao();
+            mCallback = callback;
         }
     }
 
@@ -161,19 +159,19 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
                     }
                 });
 
-                if(displaySubredditName) {
+                if(mDisplaySubredditName) {
                     if(authorPrefixed.equals(subredditNamePrefixed)) {
                         if(post.getAuthorIconUrl() == null) {
-                            new LoadUserDataAsyncTask(userDao, post.getAuthor(), mRetrofit, iconImageUrl -> {
+                            new LoadUserDataAsyncTask(mUserDao, post.getAuthor(), mRetrofit, iconImageUrl -> {
                                 if(mContext != null && getItemCount() > 0) {
                                     if(iconImageUrl == null || iconImageUrl.equals("")) {
-                                        glide.load(R.drawable.subreddit_default_icon)
+                                        mGlide.load(R.drawable.subreddit_default_icon)
                                                 .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
                                                 .into(((DataViewHolder) holder).iconGifImageView);
                                     } else {
-                                        glide.load(iconImageUrl)
+                                        mGlide.load(iconImageUrl)
                                                 .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
-                                                .error(glide.load(R.drawable.subreddit_default_icon)
+                                                .error(mGlide.load(R.drawable.subreddit_default_icon)
                                                         .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0))))
                                                 .into(((DataViewHolder) holder).iconGifImageView);
                                     }
@@ -184,29 +182,29 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
                                 }
                             }).execute();
                         } else if(!post.getAuthorIconUrl().equals("")) {
-                            glide.load(post.getAuthorIconUrl())
+                            mGlide.load(post.getAuthorIconUrl())
                                     .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
-                                    .error(glide.load(R.drawable.subreddit_default_icon)
+                                    .error(mGlide.load(R.drawable.subreddit_default_icon)
                                             .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0))))
                                     .into(((DataViewHolder) holder).iconGifImageView);
                         } else {
-                            glide.load(R.drawable.subreddit_default_icon)
+                            mGlide.load(R.drawable.subreddit_default_icon)
                                     .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
                                     .into(((DataViewHolder) holder).iconGifImageView);
                         }
                     } else {
                         if(post.getSubredditIconUrl() == null) {
-                            new LoadSubredditIconAsyncTask(subredditDao, subredditName, mRetrofit,
+                            new LoadSubredditIconAsyncTask(mSubredditDao, subredditName, mRetrofit,
                                     iconImageUrl -> {
                                         if(mContext != null && getItemCount() > 0) {
                                             if(iconImageUrl == null || iconImageUrl.equals("")) {
-                                                glide.load(R.drawable.subreddit_default_icon)
+                                                mGlide.load(R.drawable.subreddit_default_icon)
                                                         .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
                                                         .into(((DataViewHolder) holder).iconGifImageView);
                                             } else {
-                                                glide.load(iconImageUrl)
+                                                mGlide.load(iconImageUrl)
                                                         .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
-                                                        .error(glide.load(R.drawable.subreddit_default_icon)
+                                                        .error(mGlide.load(R.drawable.subreddit_default_icon)
                                                                 .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0))))
                                                         .into(((DataViewHolder) holder).iconGifImageView);
                                             }
@@ -217,13 +215,13 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
                                         }
                                     }).execute();
                         } else if(!post.getSubredditIconUrl().equals("")) {
-                            glide.load(post.getSubredditIconUrl())
+                            mGlide.load(post.getSubredditIconUrl())
                                     .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
-                                    .error(glide.load(R.drawable.subreddit_default_icon)
+                                    .error(mGlide.load(R.drawable.subreddit_default_icon)
                                             .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0))))
                                     .into(((DataViewHolder) holder).iconGifImageView);
                         } else {
-                            glide.load(R.drawable.subreddit_default_icon)
+                            mGlide.load(R.drawable.subreddit_default_icon)
                                     .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
                                     .into(((DataViewHolder) holder).iconGifImageView);
                         }
@@ -250,16 +248,16 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
                     });
                 } else {
                     if(post.getAuthorIconUrl() == null) {
-                        new LoadUserDataAsyncTask(userDao, post.getAuthor(), mRetrofit, iconImageUrl -> {
+                        new LoadUserDataAsyncTask(mUserDao, post.getAuthor(), mRetrofit, iconImageUrl -> {
                             if(mContext != null && getItemCount() > 0) {
                                 if(iconImageUrl == null || iconImageUrl.equals("")) {
-                                    glide.load(R.drawable.subreddit_default_icon)
+                                    mGlide.load(R.drawable.subreddit_default_icon)
                                             .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
                                             .into(((DataViewHolder) holder).iconGifImageView);
                                 } else {
-                                    glide.load(iconImageUrl)
+                                    mGlide.load(iconImageUrl)
                                             .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
-                                            .error(glide.load(R.drawable.subreddit_default_icon)
+                                            .error(mGlide.load(R.drawable.subreddit_default_icon)
                                                     .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0))))
                                             .into(((DataViewHolder) holder).iconGifImageView);
                                 }
@@ -270,13 +268,13 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
                             }
                         }).execute();
                     } else if(!post.getAuthorIconUrl().equals("")) {
-                        glide.load(post.getAuthorIconUrl())
+                        mGlide.load(post.getAuthorIconUrl())
                                 .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
-                                .error(glide.load(R.drawable.subreddit_default_icon)
+                                .error(mGlide.load(R.drawable.subreddit_default_icon)
                                         .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0))))
                                 .into(((DataViewHolder) holder).iconGifImageView);
                     } else {
-                        glide.load(R.drawable.subreddit_default_icon)
+                        mGlide.load(R.drawable.subreddit_default_icon)
                                 .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
                                 .into(((DataViewHolder) holder).iconGifImageView);
                     }
@@ -300,7 +298,7 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
 
                 if(gilded > 0) {
                     ((DataViewHolder) holder).gildedImageView.setVisibility(View.VISIBLE);
-                    glide.load(R.drawable.gold).into(((DataViewHolder) holder).gildedImageView);
+                    mGlide.load(R.drawable.gold).into(((DataViewHolder) holder).gildedImageView);
                     ((DataViewHolder) holder).gildedNumberTextView.setVisibility(View.VISIBLE);
                     String gildedNumber = mContext.getResources().getString(R.string.gilded, gilded);
                     ((DataViewHolder) holder).gildedNumberTextView.setText(gildedNumber);
@@ -345,9 +343,9 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
                     loadImage(holder, post);
                 }
 
-                if(postType == PostDataSource.TYPE_SUBREDDIT && post.isStickied()) {
+                if(mPostType == PostDataSource.TYPE_SUBREDDIT && post.isStickied()) {
                     ((DataViewHolder) holder).stickiedPostImageView.setVisibility(View.VISIBLE);
-                    glide.load(R.drawable.thumbtack).into(((DataViewHolder) holder).stickiedPostImageView);
+                    mGlide.load(R.drawable.thumbtack).into(((DataViewHolder) holder).stickiedPostImageView);
                 }
 
                 if(isArchived) {
@@ -362,7 +360,7 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
                 }
 
                 if(!(mContext instanceof FilteredPostsActivity)) {
-                    ((DataViewHolder) holder).typeChip.setOnClickListener(view -> callback.typeChipClicked(post.getPostType()));
+                    ((DataViewHolder) holder).typeChip.setOnClickListener(view -> mCallback.typeChipClicked(post.getPostType()));
                 }
 
                 switch (post.getPostType()) {
@@ -481,7 +479,7 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
 
                     ((DataViewHolder) holder).scoreTextView.setText(Integer.toString(post.getScore() + post.getVoteType()));
 
-                    VoteThing.voteThing(mOauthRetrofit, mSharedPreferences, new VoteThing.VoteThingListener() {
+                    VoteThing.voteThing(mOauthRetrofit, mAccessToken, new VoteThing.VoteThingListener() {
                         @Override
                         public void onVoteThingSuccess(int position1) {
                             if(newVoteType.equals(RedditUtils.DIR_UPVOTE)) {
@@ -541,7 +539,7 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
 
                     ((DataViewHolder) holder).scoreTextView.setText(Integer.toString(post.getScore() + post.getVoteType()));
 
-                    VoteThing.voteThing(mOauthRetrofit, mSharedPreferences, new VoteThing.VoteThingListener() {
+                    VoteThing.voteThing(mOauthRetrofit, mAccessToken, new VoteThing.VoteThingListener() {
                         @Override
                         public void onVoteThingSuccess(int position1) {
                             if(newVoteType.equals(RedditUtils.DIR_DOWNVOTE)) {
@@ -584,7 +582,7 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
     }
 
     private void loadImage(final RecyclerView.ViewHolder holder, final Post post) {
-        RequestBuilder imageRequestBuilder = glide.load(post.getPreviewUrl()).listener(new RequestListener<Drawable>() {
+        RequestBuilder imageRequestBuilder = mGlide.load(post.getPreviewUrl()).listener(new RequestListener<Drawable>() {
             @Override
             public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
                 ((DataViewHolder) holder).progressBar.setVisibility(View.GONE);
@@ -699,7 +697,7 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
             super(itemView);
             ButterKnife.bind(this, itemView);
             errorTextView.setText(R.string.load_posts_error);
-            retryButton.setOnClickListener(view -> callback.retryLoadingMore());
+            retryButton.setOnClickListener(view -> mCallback.retryLoadingMore());
         }
     }
 
@@ -713,8 +711,8 @@ class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView.ViewHo
     @Override
     public void onViewRecycled(@NonNull RecyclerView.ViewHolder holder) {
         if(holder instanceof DataViewHolder) {
-            glide.clear(((DataViewHolder) holder).imageView);
-            glide.clear(((DataViewHolder) holder).iconGifImageView);
+            mGlide.clear(((DataViewHolder) holder).imageView);
+            mGlide.clear(((DataViewHolder) holder).iconGifImageView);
             ((DataViewHolder) holder).stickiedPostImageView.setVisibility(View.GONE);
             ((DataViewHolder) holder).relativeLayout.setVisibility(View.GONE);
             ((DataViewHolder) holder).gildedImageView.setVisibility(View.GONE);

app/src/main/java/ml/docilealligator/infinityforreddit/PostTextActivity.java

@@ -28,7 +28,6 @@ import org.greenrobot.eventbus.Subscribe;
 import javax.inject.Inject;
 import javax.inject.Named;
 
-import SubredditDatabase.SubredditRoomDatabase;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.RoundedCornersTransformation;
@@ -48,6 +47,8 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
     private static final String FLAIR_STATE = "FS";
     private static final String IS_SPOILER_STATE = "ISS";
     private static final String IS_NSFW_STATE = "INS";
+    private static final String NULL_ACCOUNT_NAME_STATE = "NATS";
+    private static final String ACCOUNT_NAME_STATE = "ANS";
 
     private static final int SUBREDDIT_SELECTION_REQUEST_CODE = 0;
 
@@ -62,6 +63,8 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
     @BindView(R.id.post_title_edit_text_post_text_activity) EditText titleEditText;
     @BindView(R.id.post_text_content_edit_text_post_text_activity) EditText contentEditText;
 
+    private boolean mNullAccountName = false;
+    private String mAccountName;
     private String iconUrl;
     private String subredditName;
     private boolean subredditSelected = false;
@@ -90,6 +93,9 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
     @Named("auth_info")
     SharedPreferences sharedPreferences;
 
+    @Inject
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -220,6 +226,16 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
         });
     }
 
+    private void getCurrentAccountName() {
+        new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
+            if(account == null) {
+                mNullAccountName = true;
+            } else {
+                mAccountName = account.getUsername();
+            }
+        }).execute();
+    }
+
     private void displaySubredditIcon() {
         if(iconUrl != null && !iconUrl.equals("")) {
             mGlide.load(iconUrl)
@@ -235,7 +251,7 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
     }
 
     private void loadSubredditIcon() {
-        new LoadSubredditIconAsyncTask(SubredditRoomDatabase.getDatabase(this).subredditDao(),
+        new LoadSubredditIconAsyncTask(mRedditDataRoomDatabase.subredditDao(),
                 subredditName, mRetrofit, iconImageUrl -> {
             iconUrl = iconImageUrl;
             displaySubredditIcon();
@@ -309,6 +325,8 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
         outState.putString(FLAIR_STATE, flair);
         outState.putBoolean(IS_SPOILER_STATE, isSpoiler);
         outState.putBoolean(IS_NSFW_STATE, isNSFW);
+        outState.putBoolean(NULL_ACCOUNT_NAME_STATE, mNullAccountName);
+        outState.putString(ACCOUNT_NAME_STATE, mAccountName);
     }
 
     @Override

app/src/main/java/ml/docilealligator/infinityforreddit/PostVideoActivity.java

@@ -1,7 +1,6 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
@@ -34,7 +33,6 @@ import org.greenrobot.eventbus.Subscribe;
 import javax.inject.Inject;
 import javax.inject.Named;
 
-import SubredditDatabase.SubredditRoomDatabase;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.RoundedCornersTransformation;
@@ -55,6 +53,8 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
     private static final String FLAIR_STATE = "FS";
     private static final String IS_SPOILER_STATE = "ISS";
     private static final String IS_NSFW_STATE = "INS";
+    private static final String NULL_ACCOUNT_NAME_STATE = "NATS";
+    private static final String ACCOUNT_NAME_STATE = "ANS";
 
     private static final int SUBREDDIT_SELECTION_REQUEST_CODE = 0;
     private static final int PICK_VIDEO_REQUEST_CODE = 1;
@@ -75,6 +75,8 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
     @BindView(R.id.select_again_text_view_post_video_activity) TextView selectAgainTextView;
     @BindView(R.id.video_view_post_video_activity) VideoView videoView;
 
+    private boolean mNullAccountName = false;
+    private String mAccountName;
     private String iconUrl;
     private String subredditName;
     private boolean subredditSelected = false;
@@ -109,12 +111,7 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
     Retrofit mUploadVideoRetrofit;
 
     @Inject
-    @Named("user_info")
-    SharedPreferences mUserInfoSharedPreferences;
-
-    @Inject
-    @Named("auth_info")
-    SharedPreferences sharedPreferences;
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -142,6 +139,12 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
             flair = savedInstanceState.getString(FLAIR_STATE);
             isSpoiler = savedInstanceState.getBoolean(IS_SPOILER_STATE);
             isNSFW = savedInstanceState.getBoolean(IS_NSFW_STATE);
+            mNullAccountName = savedInstanceState.getBoolean(NULL_ACCOUNT_NAME_STATE);
+            mAccountName = savedInstanceState.getString(ACCOUNT_NAME_STATE);
+
+            if(!mNullAccountName && mAccountName == null) {
+                getCurrentAccountName();
+            }
 
             if(savedInstanceState.getString(VIDEO_URI_STATE) != null) {
                 videoUri = Uri.parse(savedInstanceState.getString(VIDEO_URI_STATE));
@@ -173,6 +176,8 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
                 nsfwTextView.setBackgroundColor(getResources().getColor(R.color.colorAccent));
             }
         } else {
+            getCurrentAccountName();
+
             isPosting = false;
 
             if(getIntent().hasExtra(EXTRA_SUBREDDIT_NAME)) {
@@ -272,6 +277,16 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
         });
     }
 
+    private void getCurrentAccountName() {
+        new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
+            if(account == null) {
+                mNullAccountName = true;
+            } else {
+                mAccountName = account.getUsername();
+            }
+        }).execute();
+    }
+
     private void loadVideo() {
         constraintLayout.setVisibility(View.GONE);
         videoView.setVisibility(View.VISIBLE);
@@ -295,7 +310,7 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
     }
 
     private void loadSubredditIcon() {
-        new LoadSubredditIconAsyncTask(SubredditRoomDatabase.getDatabase(this).subredditDao(),
+        new LoadSubredditIconAsyncTask(mRedditDataRoomDatabase.subredditDao(),
                 subredditName, mRetrofit, iconImageUrl -> {
             iconUrl = iconImageUrl;
             displaySubredditIcon();
@@ -387,6 +402,8 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
         outState.putString(FLAIR_STATE, flair);
         outState.putBoolean(IS_SPOILER_STATE, isSpoiler);
         outState.putBoolean(IS_NSFW_STATE, isNSFW);
+        outState.putBoolean(NULL_ACCOUNT_NAME_STATE, mNullAccountName);
+        outState.putString(ACCOUNT_NAME_STATE, mAccountName);
     }
 
     @Override
@@ -444,7 +461,7 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
         if(submitVideoPostEvent.postSuccess) {
             Intent intent = new Intent(this, ViewUserDetailActivity.class);
             intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY,
-                    mUserInfoSharedPreferences.getString(SharedPreferencesUtils.USER_KEY, ""));
+                    mAccountName);
             startActivity(intent);
             finish();
         } else if(submitVideoPostEvent.errorProcessingVideo) {

app/src/main/java/ml/docilealligator/infinityforreddit/RedditDataRoomDatabase.java

@@ -0,0 +1,42 @@
+package ml.docilealligator.infinityforreddit;
+
+import android.content.Context;
+
+import androidx.room.Database;
+import androidx.room.Room;
+import androidx.room.RoomDatabase;
+
+import Account.Account;
+import Account.AccountDao;
+import SubredditDatabase.SubredditDao;
+import SubredditDatabase.SubredditData;
+import SubscribedSubredditDatabase.SubscribedSubredditDao;
+import SubscribedSubredditDatabase.SubscribedSubredditData;
+import SubscribedUserDatabase.SubscribedUserDao;
+import SubscribedUserDatabase.SubscribedUserData;
+import User.UserDao;
+import User.UserData;
+
+@Database(entities = {Account.class, SubredditData.class, SubscribedSubredditData.class, UserData.class, SubscribedUserData.class}, version = 1)
+public abstract class RedditDataRoomDatabase extends RoomDatabase {
+    private static RedditDataRoomDatabase INSTANCE;
+
+    public abstract AccountDao accountDao();
+    public abstract SubredditDao subredditDao();
+    public abstract SubscribedSubredditDao subscribedSubredditDao();
+    public abstract UserDao userDao();
+    public abstract SubscribedUserDao subscribedUserDao();
+
+    public static RedditDataRoomDatabase getDatabase(final Context context) {
+        if(INSTANCE == null) {
+            synchronized (RedditDataRoomDatabase.class) {
+                if(INSTANCE == null) {
+                    INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
+                            RedditDataRoomDatabase.class, "reddit_data")
+                            .build();
+                }
+            }
+        }
+        return INSTANCE;
+    }
+}

app/src/main/java/ml/docilealligator/infinityforreddit/SearchResultActivity.java

@@ -16,6 +16,8 @@ import androidx.viewpager.widget.ViewPager;
 
 import com.google.android.material.tabs.TabLayout;
 
+import javax.inject.Inject;
+
 import butterknife.BindView;
 import butterknife.ButterKnife;
 
@@ -24,6 +26,13 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
     static final String EXTRA_QUERY = "QK";
     static final String EXTRA_SUBREDDIT_NAME = "ESN";
 
+    private static final String NULL_ACCESS_TOKEN_STATE = "NATS";
+    private static final String ACCESS_TOKEN_STATE = "ATS";
+    private static final String ACCOUNT_NAME_STATE = "ANS";
+
+    private boolean mNullAccessToken = false;
+    private String mAccessToken;
+    private String mAccountName;
     private String mQuery;
     private String mSubredditName;
 
@@ -36,6 +45,9 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
     private SearchPostSortTypeBottomSheetFragment searchPostSortTypeBottomSheetFragment;
     private SearchUserAndSubredditSortTypeBottomSheetFragment searchUserAndSubredditSortTypeBottomSheetFragment;
 
+    @Inject
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -43,14 +55,23 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
 
         ButterKnife.bind(this);
 
+        ((Infinity) getApplication()).getmAppComponent().inject(this);
+
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
-        sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
-        viewPager.setAdapter(sectionsPagerAdapter);
-        viewPager.setOffscreenPageLimit(2);
-
-        tabLayout.setupWithViewPager(viewPager);
+        if(savedInstanceState == null) {
+            getCurrentAccountAndInitializeViewPager();
+        } else {
+            mNullAccessToken = savedInstanceState.getBoolean(NULL_ACCESS_TOKEN_STATE);
+            mAccessToken = savedInstanceState.getString(ACCESS_TOKEN_STATE);
+            mAccountName = savedInstanceState.getString(ACCOUNT_NAME_STATE);
+            if(!mNullAccessToken && mAccessToken == null) {
+                getCurrentAccountAndInitializeViewPager();
+            } else {
+                initializeViewPager();
+            }
+        }
 
         searchPostSortTypeBottomSheetFragment = new SearchPostSortTypeBottomSheetFragment();
         Bundle bundle = new Bundle();
@@ -72,6 +93,25 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
         }
     }
 
+    private void getCurrentAccountAndInitializeViewPager() {
+        new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
+            if(account == null) {
+                mNullAccessToken = true;
+            } else {
+                mAccessToken = account.getAccessToken();
+                mAccountName = account.getUsername();
+            }
+            initializeViewPager();
+        }).execute();
+    }
+
+    private void initializeViewPager() {
+        sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
+        viewPager.setAdapter(sectionsPagerAdapter);
+        viewPager.setOffscreenPageLimit(2);
+        tabLayout.setupWithViewPager(viewPager);
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         getMenuInflater().inflate(R.menu.search_result_activity, menu);
@@ -112,6 +152,14 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
         return super.onOptionsItemSelected(item);
     }
 
+    @Override
+    protected void onSaveInstanceState(@NonNull Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putBoolean(NULL_ACCESS_TOKEN_STATE, mNullAccessToken);
+        outState.putString(ACCESS_TOKEN_STATE, mAccessToken);
+        outState.putString(ACCOUNT_NAME_STATE, mAccountName);
+    }
+
     @Override
     public void searchSortTypeSelected(String sortType) {
         sectionsPagerAdapter.changeSortType(sortType, 0);
@@ -144,21 +192,26 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
                     bundle.putString(PostFragment.EXTRA_NAME, mSubredditName);
                     bundle.putString(PostFragment.EXTRA_QUERY, mQuery);
                     bundle.putInt(PostFragment.EXTRA_FILTER, PostFragment.EXTRA_NO_FILTER);
+                    bundle.putString(PostFragment.EXTRA_ACCESS_TOKEN, mAccessToken);
                     mFragment.setArguments(bundle);
                     return mFragment;
                 }
                 case 1: {
                     SubredditListingFragment mFragment = new SubredditListingFragment();
                     Bundle bundle = new Bundle();
-                    bundle.putString(SubredditListingFragment.EXTRA_QUERY_KEY, mQuery);
+                    bundle.putString(SubredditListingFragment.EXTRA_QUERY, mQuery);
                     bundle.putBoolean(SubredditListingFragment.EXTRA_IS_POSTING, false);
+                    bundle.putString(SubredditListingFragment.EXTRA_ACCESS_TOKEN, mAccessToken);
+                    bundle.putString(SubredditListingFragment.EXTRA_ACCOUNT_NAME, mAccountName);
                     mFragment.setArguments(bundle);
                     return mFragment;
                 }
                 default: {
                     UserListingFragment mFragment = new UserListingFragment();
                     Bundle bundle = new Bundle();
-                    bundle.putString(UserListingFragment.QUERY_KEY, mQuery);
+                    bundle.putString(UserListingFragment.EXTRA_QUERY, mQuery);
+                    bundle.putString(UserListingFragment.EXTRA_ACCESS_TOKEN, mAccessToken);
+                    bundle.putString(UserListingFragment.EXTRA_ACCOUNT_NAME, mAccountName);
                     mFragment.setArguments(bundle);
                     return mFragment;
                 }

app/src/main/java/ml/docilealligator/infinityforreddit/SearchSubredditsResultActivity.java

@@ -10,6 +10,8 @@ import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.Fragment;
 
+import javax.inject.Inject;
+
 import butterknife.BindView;
 import butterknife.ButterKnife;
 
@@ -19,12 +21,22 @@ public class SearchSubredditsResultActivity extends AppCompatActivity {
     static final String EXTRA_RETURN_SUBREDDIT_NAME = "ERSN";
     static final String EXTRA_RETURN_SUBREDDIT_ICON_URL = "ERSIURL";
 
+    private static final String NULL_ACCESS_TOKEN_STATE = "NATS";
+    private static final String ACCESS_TOKEN_STATE = "ATS";
+    private static final String ACCOUNT_NAME_STATE = "ANS";
     private static final String FRAGMENT_OUT_STATE = "FOS";
 
     @BindView(R.id.toolbar_search_subreddits_result_activity) Toolbar toolbar;
 
+    private boolean mNullAccessToken = false;
+    private String mAccessToken;
+    private String mAccountName;
+
     Fragment mFragment;
 
+    @Inject
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -32,23 +44,46 @@ public class SearchSubredditsResultActivity extends AppCompatActivity {
 
         ButterKnife.bind(this);
 
+        ((Infinity) getApplication()).getmAppComponent().inject(this);
+
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
         String query = getIntent().getExtras().getString(EXTRA_QUERY);
 
         if(savedInstanceState == null) {
+            getCurrentAccountAndInitializeFragment(query);
+        } else {
+            mNullAccessToken = savedInstanceState.getBoolean(NULL_ACCESS_TOKEN_STATE);
+            mAccessToken = savedInstanceState.getString(ACCESS_TOKEN_STATE);
+            mAccountName = savedInstanceState.getString(ACCOUNT_NAME_STATE);
+            if(!mNullAccessToken && mAccessToken == null) {
+                getCurrentAccountAndInitializeFragment(query);
+            } else {
+                mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE);
+                getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_search_subreddits_result_activity, mFragment).commit();
+            }
+        }
+    }
+
+    private void getCurrentAccountAndInitializeFragment(String query) {
+        new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
+            if(account == null) {
+                mNullAccessToken = true;
+            } else {
+                mAccessToken = account.getAccessToken();
+                mAccountName = account.getUsername();
+            }
+
             mFragment = new SubredditListingFragment();
             Bundle bundle = new Bundle();
-            bundle.putString(SubredditListingFragment.EXTRA_QUERY_KEY, query);
+            bundle.putString(SubredditListingFragment.EXTRA_QUERY, query);
             bundle.putBoolean(SubredditListingFragment.EXTRA_IS_POSTING, true);
+            bundle.putString(SubredditListingFragment.EXTRA_ACCESS_TOKEN, mAccessToken);
+            bundle.putString(SubredditListingFragment.EXTRA_ACCOUNT_NAME, mAccountName);
             mFragment.setArguments(bundle);
             getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_search_subreddits_result_activity, mFragment).commit();
-        } else {
-            mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE);
-            getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_search_subreddits_result_activity, mFragment).commit();
-
-        }
+        }).execute();
     }
 
     void getSelectedSubreddit(String name, String iconUrl) {
@@ -74,5 +109,8 @@ public class SearchSubredditsResultActivity extends AppCompatActivity {
         if (mFragment != null) {
             getSupportFragmentManager().putFragment(outState, FRAGMENT_OUT_STATE, mFragment);
         }
+        outState.putBoolean(NULL_ACCESS_TOKEN_STATE, mNullAccessToken);
+        outState.putString(ACCESS_TOKEN_STATE, mAccessToken);
+        outState.putString(ACCOUNT_NAME_STATE, mAccountName);
     }
 }

app/src/main/java/ml/docilealligator/infinityforreddit/SubredditListingFragment.java

@@ -12,6 +12,7 @@ import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
 import androidx.lifecycle.ViewModelProviders;
@@ -24,7 +25,6 @@ import com.lsjwzh.widget.materialloadingprogressbar.CircleProgressBar;
 import javax.inject.Inject;
 import javax.inject.Named;
 
-import SubscribedSubredditDatabase.SubscribedSubredditRoomDatabase;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import retrofit2.Retrofit;
@@ -35,8 +35,10 @@ import retrofit2.Retrofit;
  */
 public class SubredditListingFragment extends Fragment implements FragmentCommunicator {
 
-    static final String EXTRA_QUERY_KEY = "EQK";
+    static final String EXTRA_QUERY = "EQ";
     static final String EXTRA_IS_POSTING = "EIP";
+    static final String EXTRA_ACCESS_TOKEN = "EAT";
+    static final String EXTRA_ACCOUNT_NAME = "EAN";
 
     @BindView(R.id.coordinator_layout_subreddit_listing_fragment) CoordinatorLayout mCoordinatorLayout;
     @BindView(R.id.recycler_view_subreddit_listing_fragment) RecyclerView mSubredditListingRecyclerView;
@@ -60,13 +62,16 @@ public class SubredditListingFragment extends Fragment implements FragmentCommun
     @Inject @Named("oauth")
     Retrofit mOauthRetrofit;
 
+    @Inject
+    RedditDataRoomDatabase redditDataRoomDatabase;
+
     public SubredditListingFragment() {
         // Required empty public constructor
     }
 
 
     @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         // Inflate the layout for this fragment
         View rootView = inflater.inflate(R.layout.fragment_subreddit_listing, container, false);
@@ -80,8 +85,10 @@ public class SubredditListingFragment extends Fragment implements FragmentCommun
         mLinearLayoutManager = new LinearLayoutManager(getActivity());
         mSubredditListingRecyclerView.setLayoutManager(mLinearLayoutManager);
 
-        String query = getArguments().getString(EXTRA_QUERY_KEY);
+        String query = getArguments().getString(EXTRA_QUERY);
         boolean isPosting = getArguments().getBoolean(EXTRA_IS_POSTING);
+        String accessToken = getArguments().getString(EXTRA_ACCESS_TOKEN);
+        String accountName = getArguments().getString(EXTRA_ACCOUNT_NAME);
 
         SubredditListingViewModel.Factory factory = new SubredditListingViewModel.Factory(mRetrofit, query,
                 PostDataSource.SORT_TYPE_RELEVANCE, new SubredditListingDataSource.OnSubredditListingDataFetchedCallback() {
@@ -99,9 +106,8 @@ public class SubredditListingFragment extends Fragment implements FragmentCommun
             }
         });
 
-        mAdapter = new SubredditListingRecyclerViewAdapter(getActivity(), mOauthRetrofit, mRetrofit,
-                mAuthInfoSharedPreferences,
-                SubscribedSubredditRoomDatabase.getDatabase(getContext()).subscribedSubredditDao(),
+        mAdapter = new SubredditListingRecyclerViewAdapter(activity, mOauthRetrofit, mRetrofit,
+                accessToken, accountName, redditDataRoomDatabase.subscribedSubredditDao(),
                 new SubredditListingRecyclerViewAdapter.Callback() {
                     @Override
                     public void retryLoadingMore() {

app/src/main/java/ml/docilealligator/infinityforreddit/SubredditListingRecyclerViewAdapter.java

@@ -1,7 +1,6 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.content.Context;
-import android.content.SharedPreferences;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -44,21 +43,23 @@ public class SubredditListingRecyclerViewAdapter extends PagedListAdapter<Subred
     private Context context;
     private Retrofit oauthRetrofit;
     private Retrofit retrofit;
-    private SharedPreferences authInfoSharedPreferences;
+    private String accessToken;
+    private String accountName;
     private SubscribedSubredditDao subscribedSubredditDao;
 
     private NetworkState networkState;
     private Callback callback;
 
     SubredditListingRecyclerViewAdapter(Context context, Retrofit oauthRetrofit, Retrofit retrofit,
-                                        SharedPreferences authInfoSharedPreferences,
+                                        String accessToken, String accountName,
                                         SubscribedSubredditDao subscribedSubredditDao,
                                         Callback callback) {
         super(DIFF_CALLBACK);
         this.context = context;
         this.oauthRetrofit = oauthRetrofit;
         this.retrofit = retrofit;
-        this.authInfoSharedPreferences = authInfoSharedPreferences;
+        this.accessToken = accessToken;
+        this.accountName = accountName;
         this.subscribedSubredditDao = subscribedSubredditDao;
         this.callback = callback;
         glide = Glide.with(context.getApplicationContext());
@@ -112,7 +113,7 @@ public class SubredditListingRecyclerViewAdapter extends PagedListAdapter<Subred
 
             ((DataViewHolder) holder).subredditNameTextView.setText(subredditData.getName());
 
-            new CheckIsSubscribedToSubredditAsyncTask(subscribedSubredditDao, subredditData.getName(),
+            new CheckIsSubscribedToSubredditAsyncTask(subscribedSubredditDao, subredditData.getName(), accountName,
                     new CheckIsSubscribedToSubredditAsyncTask.CheckIsSubscribedToSubredditListener() {
                         @Override
                         public void isSubscribed() {
@@ -124,7 +125,7 @@ public class SubredditListingRecyclerViewAdapter extends PagedListAdapter<Subred
                             ((DataViewHolder) holder).subscribeButton.setVisibility(View.VISIBLE);
                             ((DataViewHolder) holder).subscribeButton.setOnClickListener(view -> {
                                 SubredditSubscription.subscribeToSubreddit(oauthRetrofit, retrofit,
-                                        authInfoSharedPreferences, subredditData.getName(), subscribedSubredditDao,
+                                        accessToken, accountName, subredditData.getName(), subscribedSubredditDao,
                                         new SubredditSubscription.SubredditSubscriptionListener() {
                                             @Override
                                             public void onSubredditSubscriptionSuccess() {

app/src/main/java/ml/docilealligator/infinityforreddit/SubredditSubscription.java

@@ -1,16 +1,16 @@
 package ml.docilealligator.infinityforreddit;
 
-import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.util.Log;
 
+import androidx.annotation.NonNull;
+
 import java.util.HashMap;
 import java.util.Map;
 
 import SubredditDatabase.SubredditData;
 import SubscribedSubredditDatabase.SubscribedSubredditDao;
 import SubscribedSubredditDatabase.SubscribedSubredditData;
-import androidx.annotation.NonNull;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Retrofit;
@@ -22,27 +22,27 @@ class SubredditSubscription {
     }
 
     static void subscribeToSubreddit(Retrofit oauthRetrofit, Retrofit retrofit,
-                                     SharedPreferences authInfoSharedPreferences, String subredditName,
+                                     String accessToken, String subredditName, String accountName,
                                      SubscribedSubredditDao subscribedSubredditDao,
                                      SubredditSubscriptionListener subredditSubscriptionListener) {
-        subredditSubscription(oauthRetrofit, retrofit, authInfoSharedPreferences, subredditName, "sub",
+        subredditSubscription(oauthRetrofit, retrofit, accessToken, subredditName, accountName, "sub",
                 subscribedSubredditDao, subredditSubscriptionListener);
     }
 
-    static void unsubscribeToSubreddit(Retrofit oauthRetrofit, SharedPreferences authInfoSharedPreferences,
-                                       String subredditName, SubscribedSubredditDao subscribedSubredditDao,
+    static void unsubscribeToSubreddit(Retrofit oauthRetrofit, String accessToken,
+                                       String subredditName, String accountName,
+                                       SubscribedSubredditDao subscribedSubredditDao,
                                        SubredditSubscriptionListener subredditSubscriptionListener) {
-        subredditSubscription(oauthRetrofit, null, authInfoSharedPreferences, subredditName, "unsub",
+        subredditSubscription(oauthRetrofit, null, accessToken, subredditName, accountName, "unsub",
                 subscribedSubredditDao,subredditSubscriptionListener);
     }
 
-    private static void subredditSubscription(Retrofit oauthRetrofit, Retrofit retrofit, SharedPreferences authInfoSharedPreferences,
-                                              String subredditName, String action, SubscribedSubredditDao subscribedSubredditDao,
+    private static void subredditSubscription(Retrofit oauthRetrofit, Retrofit retrofit, String accessToken,
+                                              String subredditName, String accountName, String action,
+                                              SubscribedSubredditDao subscribedSubredditDao,
                                               SubredditSubscriptionListener subredditSubscriptionListener) {
         RedditAPI api = oauthRetrofit.create(RedditAPI.class);
 
-        String accessToken = authInfoSharedPreferences.getString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, "");
-
         Map<String, String> params = new HashMap<>();
         params.put(RedditUtils.ACTION_KEY, action);
         params.put(RedditUtils.SR_NAME_KEY, subredditName);
@@ -57,7 +57,7 @@ class SubredditSubscription {
                             @Override
                             public void onFetchSubredditDataSuccess(SubredditData subredditData, int nCurrentOnlineSubscribers) {
                                 new UpdateSubscriptionAsyncTask(subscribedSubredditDao,
-                                        subredditData, true).execute();
+                                        subredditData, accountName, true).execute();
                             }
 
                             @Override
@@ -66,7 +66,7 @@ class SubredditSubscription {
                             }
                         });
                     } else {
-                        new UpdateSubscriptionAsyncTask(subscribedSubredditDao, subredditName, false).execute();
+                        new UpdateSubscriptionAsyncTask(subscribedSubredditDao, subredditName, accountName, false).execute();
                     }
                     subredditSubscriptionListener.onSubredditSubscriptionSuccess();
                 } else {
@@ -87,20 +87,24 @@ class SubredditSubscription {
 
         private SubscribedSubredditDao subscribedSubredditDao;
         private String subredditName;
+        private String accountName;
         private SubscribedSubredditData subscribedSubredditData;
         private boolean isSubscribing;
 
         UpdateSubscriptionAsyncTask(SubscribedSubredditDao subscribedSubredditDao, String subredditName,
-                                    boolean isSubscribing) {
+                                    String accountName, boolean isSubscribing) {
             this.subscribedSubredditDao = subscribedSubredditDao;
             this.subredditName = subredditName;
+            this.accountName = accountName;
             this.isSubscribing = isSubscribing;
         }
 
-        UpdateSubscriptionAsyncTask(SubscribedSubredditDao subscribedSubredditDao, SubscribedSubredditData subscribedSubredditData,
-                                    boolean isSubscribing) {
+        UpdateSubscriptionAsyncTask(SubscribedSubredditDao subscribedSubredditDao, SubredditData subredditData,
+                                    String accountName, boolean isSubscribing) {
             this.subscribedSubredditDao = subscribedSubredditDao;
-            this.subscribedSubredditData = subscribedSubredditData;
+            this.subscribedSubredditData = new SubscribedSubredditData(subredditData.getId(), subredditData.getName(),
+                    subredditData.getIconUrl(), accountName);
+            this.accountName = accountName;
             this.isSubscribing = isSubscribing;
         }
 
@@ -109,7 +113,7 @@ class SubredditSubscription {
             if(isSubscribing) {
                 subscribedSubredditDao.insert(subscribedSubredditData);
             } else {
-                subscribedSubredditDao.deleteSubscribedSubreddit(subredditName);;
+                subscribedSubredditDao.deleteSubscribedSubreddit(subredditName, accountName);
             }
             return null;
         }

app/src/main/java/ml/docilealligator/infinityforreddit/SubscribedSubredditsListingFragment.java

@@ -2,7 +2,6 @@ package ml.docilealligator.infinityforreddit;
 
 
 import android.app.Activity;
-import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -10,6 +9,7 @@ import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 
+import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
 import androidx.lifecycle.ViewModelProviders;
 import androidx.recyclerview.widget.LinearLayoutManager;
@@ -19,7 +19,6 @@ import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
 
 import javax.inject.Inject;
-import javax.inject.Named;
 
 import SubscribedSubredditDatabase.SubscribedSubredditViewModel;
 import butterknife.BindView;
@@ -31,6 +30,8 @@ import butterknife.ButterKnife;
  */
 public class SubscribedSubredditsListingFragment extends Fragment {
 
+    static final String EXTRA_ACCOUNT_NAME = "EAT";
+    static final String EXTRA_ACCOUNT_PROFILE_IMAGE_URL = "EAPIU";
     static final String EXTRA_IS_SUBREDDIT_SELECTION = "EISS";
     static final String EXTRA_EXTRA_CLEAR_SELECTION = "EECS";
 
@@ -45,15 +46,14 @@ public class SubscribedSubredditsListingFragment extends Fragment {
     private SubscribedSubredditViewModel mSubscribedSubredditViewModel;
 
     @Inject
-    @Named("user_info")
-    SharedPreferences sharedPreferences;
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
 
     public SubscribedSubredditsListingFragment() {
         // Required empty public constructor
     }
 
     @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         View rootView = inflater.inflate(R.layout.fragment_subscribed_subreddits_listing, container, false);
 
@@ -63,8 +63,7 @@ public class SubscribedSubredditsListingFragment extends Fragment {
 
         ((Infinity) mActivity.getApplication()).getmAppComponent().inject(this);
 
-        String username = sharedPreferences.getString(SharedPreferencesUtils.USER_KEY, "");
-        String userIconUrl = sharedPreferences.getString(SharedPreferencesUtils.PROFILE_IMAGE_URL_KEY, "");
+        String accountName = getArguments().getString(EXTRA_ACCOUNT_NAME);
 
         mGlide = Glide.with(this);
 
@@ -80,7 +79,9 @@ public class SubscribedSubredditsListingFragment extends Fragment {
 
         mRecyclerView.setAdapter(adapter);
 
-        mSubscribedSubredditViewModel = ViewModelProviders.of(this).get(SubscribedSubredditViewModel.class);
+        mSubscribedSubredditViewModel = ViewModelProviders.of(this,
+                new SubscribedSubredditViewModel.Factory(mActivity.getApplication(), mRedditDataRoomDatabase, accountName))
+                .get(SubscribedSubredditViewModel.class);
         mSubscribedSubredditViewModel.getAllSubscribedSubreddits().observe(this, subscribedSubredditData -> {
             if (subscribedSubredditData == null || subscribedSubredditData.size() == 0) {
                 mRecyclerView.setVisibility(View.GONE);
@@ -91,7 +92,7 @@ public class SubscribedSubredditsListingFragment extends Fragment {
                 mRecyclerView.setVisibility(View.VISIBLE);
             }
 
-            adapter.addUser(username, userIconUrl);
+            adapter.addUser(accountName, getArguments().getString(EXTRA_ACCOUNT_PROFILE_IMAGE_URL));
             adapter.setSubscribedSubreddits(subscribedSubredditData);
         });
 

app/src/main/java/ml/docilealligator/infinityforreddit/SubscribedThingListingActivity.java

@@ -1,6 +1,5 @@
 package ml.docilealligator.infinityforreddit;
 
-import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.MenuItem;
 import android.view.ViewGroup;
@@ -21,11 +20,8 @@ import javax.inject.Inject;
 import javax.inject.Named;
 
 import SubredditDatabase.SubredditData;
-import SubredditDatabase.SubredditRoomDatabase;
 import SubscribedSubredditDatabase.SubscribedSubredditData;
-import SubscribedSubredditDatabase.SubscribedSubredditRoomDatabase;
 import SubscribedUserDatabase.SubscribedUserData;
-import SubscribedUserDatabase.SubscribedUserRoomDatabase;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import retrofit2.Retrofit;
@@ -34,22 +30,28 @@ public class SubscribedThingListingActivity extends AppCompatActivity {
 
     private static final String INSERT_SUBSCRIBED_SUBREDDIT_STATE = "ISSS";
 
+    private static final String NULL_ACCESS_TOKEN_STATE = "NATS";
+    private static final String ACCESS_TOKEN_STATE = "ATS";
+    private static final String ACCOUNT_NAME_STATE = "ANS";
+
     @BindView(R.id.toolbar_subscribed_thing_listing_activity) Toolbar toolbar;
     @BindView(R.id.tab_layout_subscribed_thing_listing_activity) TabLayout tabLayout;
     @BindView(R.id.view_pager_subscribed_thing_listing_activity) ViewPager viewPager;
 
+    private boolean mNullAccessToken = false;
+    private String mAccessToken;
+    private String mAccountName;
     private boolean mInsertSuccess = false;
 
     private SectionsPagerAdapter sectionsPagerAdapter;
 
-    @Inject
-    @Named("auth_info")
-    SharedPreferences mAuthInfoSharedPreferences;
-
     @Inject
     @Named("oauth")
     Retrofit mOauthRetrofit;
 
+    @Inject
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -62,15 +64,39 @@ public class SubscribedThingListingActivity extends AppCompatActivity {
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
+        if(savedInstanceState != null) {
+            mInsertSuccess = savedInstanceState.getBoolean(INSERT_SUBSCRIBED_SUBREDDIT_STATE);
+            mNullAccessToken = savedInstanceState.getBoolean(NULL_ACCESS_TOKEN_STATE);
+            mAccessToken = savedInstanceState.getString(ACCESS_TOKEN_STATE);
+            mAccountName = savedInstanceState.getString(ACCOUNT_NAME_STATE);
+            if(!mNullAccessToken && mAccessToken == null) {
+                getCurrentAccountAndInitializeViewPager();
+            } else {
+                initializeViewPagerAndLoadSubscriptions();
+            }
+        } else {
+            getCurrentAccountAndInitializeViewPager();
+        }
+    }
+
+    private void getCurrentAccountAndInitializeViewPager() {
+        new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
+            if(account == null) {
+                mNullAccessToken = true;
+            } else {
+                mAccessToken = account.getAccessToken();
+                mAccountName = account.getUsername();
+            }
+            initializeViewPagerAndLoadSubscriptions();
+        }).execute();
+    }
+
+    private void initializeViewPagerAndLoadSubscriptions() {
         sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
         viewPager.setAdapter(sectionsPagerAdapter);
         viewPager.setOffscreenPageLimit(2);
         tabLayout.setupWithViewPager(viewPager);
 
-        if(savedInstanceState != null) {
-            mInsertSuccess = savedInstanceState.getBoolean(INSERT_SUBSCRIBED_SUBREDDIT_STATE);
-        }
-
         loadSubscriptions();
     }
 
@@ -88,11 +114,14 @@ public class SubscribedThingListingActivity extends AppCompatActivity {
     protected void onSaveInstanceState(@NonNull Bundle outState) {
         super.onSaveInstanceState(outState);
         outState.putBoolean(INSERT_SUBSCRIBED_SUBREDDIT_STATE, mInsertSuccess);
+        outState.putBoolean(NULL_ACCESS_TOKEN_STATE, mNullAccessToken);
+        outState.putString(ACCESS_TOKEN_STATE, mAccessToken);
+        outState.putString(ACCOUNT_NAME_STATE, mAccountName);
     }
 
     private void loadSubscriptions() {
         if (!mInsertSuccess) {
-            FetchSubscribedThing.fetchSubscribedThing(mOauthRetrofit, mAuthInfoSharedPreferences, null,
+            FetchSubscribedThing.fetchSubscribedThing(mOauthRetrofit, mAccessToken, mAccountName, null,
                     new ArrayList<>(), new ArrayList<>(),
                     new ArrayList<>(),
                     new FetchSubscribedThing.FetchSubscribedThingListener() {
@@ -101,9 +130,9 @@ public class SubscribedThingListingActivity extends AppCompatActivity {
                                                                   ArrayList<SubscribedUserData> subscribedUserData,
                                                                   ArrayList<SubredditData> subredditData) {
                             new InsertSubscribedThingsAsyncTask(
-                                    SubscribedSubredditRoomDatabase.getDatabase(SubscribedThingListingActivity.this).subscribedSubredditDao(),
-                                    SubscribedUserRoomDatabase.getDatabase(SubscribedThingListingActivity.this).subscribedUserDao(),
-                                    SubredditRoomDatabase.getDatabase(SubscribedThingListingActivity.this).subredditDao(),
+                                    mRedditDataRoomDatabase.subscribedSubredditDao(),
+                                    mRedditDataRoomDatabase.subscribedUserDao(),
+                                    mRedditDataRoomDatabase.subredditDao(),
                                     subscribedSubredditData,
                                     subscribedUserData,
                                     subredditData,
@@ -132,12 +161,17 @@ public class SubscribedThingListingActivity extends AppCompatActivity {
                     SubscribedSubredditsListingFragment fragment = new SubscribedSubredditsListingFragment();
                     Bundle bundle = new Bundle();
                     bundle.putBoolean(SubscribedSubredditsListingFragment.EXTRA_IS_SUBREDDIT_SELECTION, false);
+                    bundle.putString(SubscribedSubredditsListingFragment.EXTRA_ACCOUNT_NAME, mAccountName);
                     fragment.setArguments(bundle);
                     return fragment;
                 }
                 default:
                 {
-                    return new FollowedUsersListingFragment();
+                    FollowedUsersListingFragment fragment = new FollowedUsersListingFragment();
+                    Bundle bundle = new Bundle();
+                    bundle.putString(FollowedUsersListingFragment.EXTRA_ACCOUNT_NAME, mAccountName);
+                    fragment.setArguments(bundle);
+                    return fragment;
                 }
             }
         }

app/src/main/java/ml/docilealligator/infinityforreddit/UserFollowing.java

@@ -1,6 +1,5 @@
 package ml.docilealligator.infinityforreddit;
 
-import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.util.Log;
 
@@ -23,31 +22,29 @@ class UserFollowing {
     }
 
     static void followUser(Retrofit oauthRetrofit, Retrofit retrofit,
-                           SharedPreferences authInfoSharedPreferences, String userName,
+                           String accessToken, String username, String accountName,
                            SubscribedUserDao subscribedUserDao,
                            UserFollowingListener userFollowingListener) {
-        userFollowing(oauthRetrofit, retrofit, authInfoSharedPreferences, userName, "sub",
+        userFollowing(oauthRetrofit, retrofit, accessToken, username, accountName, "sub",
                 subscribedUserDao, userFollowingListener);
     }
 
     static void unfollowUser(Retrofit oauthRetrofit, Retrofit retrofit,
-                             SharedPreferences authInfoSharedPreferences, String userName,
+                             String accessToken, String username, String accountName,
                              SubscribedUserDao subscribedUserDao,
                              UserFollowingListener userFollowingListener) {
-        userFollowing(oauthRetrofit, retrofit, authInfoSharedPreferences, userName, "unsub",
+        userFollowing(oauthRetrofit, retrofit, accessToken, username, accountName, "unsub",
                 subscribedUserDao, userFollowingListener);
     }
 
-    private static void userFollowing(Retrofit oauthRetrofit, Retrofit retrofit, SharedPreferences authInfoSharedPreferences,
-                                      String userName, String action, SubscribedUserDao subscribedUserDao,
+    private static void userFollowing(Retrofit oauthRetrofit, Retrofit retrofit, String accessToken,
+                                      String username, String accountName, String action, SubscribedUserDao subscribedUserDao,
                                       UserFollowingListener userFollowingListener) {
         RedditAPI api = oauthRetrofit.create(RedditAPI.class);
 
-        String accessToken = authInfoSharedPreferences.getString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, "");
-
         Map<String, String> params = new HashMap<>();
         params.put(RedditUtils.ACTION_KEY, action);
-        params.put(RedditUtils.SR_NAME_KEY, "u_" + userName);
+        params.put(RedditUtils.SR_NAME_KEY, "u_" + username);
 
         Call<String> subredditSubscriptionCall = api.subredditSubscription(RedditUtils.getOAuthHeader(accessToken), params);
         subredditSubscriptionCall.enqueue(new Callback<String>() {
@@ -55,10 +52,10 @@ class UserFollowing {
             public void onResponse(@NonNull Call<String> call, @NonNull retrofit2.Response<String> response) {
                 if(response.isSuccessful()) {
                     if(action.equals("sub")) {
-                        FetchUserData.fetchUserData(retrofit, userName, new FetchUserData.FetchUserDataListener() {
+                        FetchUserData.fetchUserData(retrofit, username, new FetchUserData.FetchUserDataListener() {
                             @Override
                             public void onFetchUserDataSuccess(UserData userData) {
-                                new UpdateSubscriptionAsyncTask(subscribedUserDao, userData, true).execute();
+                                new UpdateSubscriptionAsyncTask(subscribedUserDao, userData, accountName, true).execute();
                             }
 
                             @Override
@@ -67,7 +64,7 @@ class UserFollowing {
                             }
                         });
                     } else {
-                        new UpdateSubscriptionAsyncTask(subscribedUserDao, userName, false).execute();
+                        new UpdateSubscriptionAsyncTask(subscribedUserDao, username, accountName, false).execute();
                     }
                     userFollowingListener.onUserFollowingSuccess();
                 } else {
@@ -87,21 +84,25 @@ class UserFollowing {
     private static class UpdateSubscriptionAsyncTask extends AsyncTask<Void, Void, Void> {
 
         private SubscribedUserDao subscribedUserDao;
-        private String userName;
+        private String username;
+        private String accountName;
         private SubscribedUserData subscribedUserData;
         private boolean isSubscribing;
 
-        UpdateSubscriptionAsyncTask(SubscribedUserDao subscribedUserDao, String userName,
-                                    boolean isSubscribing) {
+        UpdateSubscriptionAsyncTask(SubscribedUserDao subscribedUserDao, String username,
+                                    String accountName, boolean isSubscribing) {
             this.subscribedUserDao = subscribedUserDao;
-            this.userName = userName;
+            this.username = username;
+            this.accountName = accountName;
             this.isSubscribing = isSubscribing;
         }
 
-        UpdateSubscriptionAsyncTask(SubscribedUserDao subscribedUserDao, SubscribedUserData subscribedUserData,
-                                    boolean isSubscribing) {
+        UpdateSubscriptionAsyncTask(SubscribedUserDao subscribedUserDao, UserData userData,
+                                    String accountName, boolean isSubscribing) {
             this.subscribedUserDao = subscribedUserDao;
-            this.subscribedUserData = subscribedUserData;
+            this.subscribedUserData = new SubscribedUserData(userData.getName(), userData.getIconUrl(),
+                    userData.getName());
+            this.accountName = accountName;
             this.isSubscribing = isSubscribing;
         }
 
@@ -110,7 +111,7 @@ class UserFollowing {
             if(isSubscribing) {
                 subscribedUserDao.insert(subscribedUserData);
             } else {
-                subscribedUserDao.deleteSubscribedUser(userName);
+                subscribedUserDao.deleteSubscribedUser(username, accountName);
             }
             return null;
         }

app/src/main/java/ml/docilealligator/infinityforreddit/UserListingFragment.java

@@ -22,7 +22,6 @@ import com.lsjwzh.widget.materialloadingprogressbar.CircleProgressBar;
 import javax.inject.Inject;
 import javax.inject.Named;
 
-import SubscribedUserDatabase.SubscribedUserRoomDatabase;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import retrofit2.Retrofit;
@@ -32,20 +31,17 @@ import retrofit2.Retrofit;
  * A simple {@link Fragment} subclass.
  */
 public class UserListingFragment extends Fragment implements FragmentCommunicator {
-    static final String QUERY_KEY = "QK";
 
-    @BindView(R.id.coordinator_layout_user_listing_fragment)
-    CoordinatorLayout mCoordinatorLayout;
-    @BindView(R.id.recycler_view_user_listing_fragment)
-    RecyclerView mUserListingRecyclerView;
-    @BindView(R.id.progress_bar_user_listing_fragment)
-    CircleProgressBar mProgressBar;
-    @BindView(R.id.fetch_user_listing_info_linear_layout_user_listing_fragment)
-    LinearLayout mFetchUserListingInfoLinearLayout;
-    @BindView(R.id.fetch_user_listing_info_image_view_user_listing_fragment)
-    ImageView mFetchUserListingInfoImageView;
-    @BindView(R.id.fetch_user_listing_info_text_view_user_listing_fragment)
-    TextView mFetchUserListingInfoTextView;
+    static final String EXTRA_QUERY = "EQ";
+    static final String EXTRA_ACCESS_TOKEN = "EAT";
+    static final String EXTRA_ACCOUNT_NAME = "EAN";
+
+    @BindView(R.id.coordinator_layout_user_listing_fragment) CoordinatorLayout mCoordinatorLayout;
+    @BindView(R.id.recycler_view_user_listing_fragment) RecyclerView mUserListingRecyclerView;
+    @BindView(R.id.progress_bar_user_listing_fragment) CircleProgressBar mProgressBar;
+    @BindView(R.id.fetch_user_listing_info_linear_layout_user_listing_fragment) LinearLayout mFetchUserListingInfoLinearLayout;
+    @BindView(R.id.fetch_user_listing_info_image_view_user_listing_fragment) ImageView mFetchUserListingInfoImageView;
+    @BindView(R.id.fetch_user_listing_info_text_view_user_listing_fragment) TextView mFetchUserListingInfoTextView;
 
     private LinearLayoutManager mLinearLayoutManager;
 
@@ -65,6 +61,9 @@ public class UserListingFragment extends Fragment implements FragmentCommunicato
     @Inject @Named("oauth")
     Retrofit mOauthRetrofit;
 
+    @Inject
+    RedditDataRoomDatabase redditDataRoomDatabase;
+
     public UserListingFragment() {
         // Required empty public constructor
     }
@@ -83,7 +82,9 @@ public class UserListingFragment extends Fragment implements FragmentCommunicato
         mLinearLayoutManager = new LinearLayoutManager(getActivity());
         mUserListingRecyclerView.setLayoutManager(mLinearLayoutManager);
 
-        mQuery = getArguments().getString(QUERY_KEY);
+        mQuery = getArguments().getString(EXTRA_QUERY);
+        String accessToken = getArguments().getString(EXTRA_ACCESS_TOKEN);
+        String accountName = getArguments().getString(EXTRA_ACCOUNT_NAME);
 
         UserListingViewModel.Factory factory = new UserListingViewModel.Factory(mRetrofit, mQuery,
                 PostDataSource.SORT_TYPE_RELEVANCE, new UserListingDataSource.OnUserListingDataFetchedCallback() {
@@ -102,8 +103,7 @@ public class UserListingFragment extends Fragment implements FragmentCommunicato
                 });
 
         mAdapter = new UserListingRecyclerViewAdapter(getActivity(), mOauthRetrofit, mRetrofit,
-                mAuthInfoSharedPreferences,
-                SubscribedUserRoomDatabase.getDatabase(getContext()).subscribedUserDao(),
+                accessToken, accountName, redditDataRoomDatabase.subscribedUserDao(),
                 () -> mUserListingViewModel.retryLoadingMore());
 
         mUserListingRecyclerView.setAdapter(mAdapter);

app/src/main/java/ml/docilealligator/infinityforreddit/UserListingRecyclerViewAdapter.java

@@ -2,7 +2,6 @@ package ml.docilealligator.infinityforreddit;
 
 import android.content.Context;
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -44,21 +43,22 @@ public class UserListingRecyclerViewAdapter extends PagedListAdapter<UserData, R
     private Context context;
     private Retrofit oauthRetrofit;
     private Retrofit retrofit;
-    private SharedPreferences authInfoSharedPreferences;
+    private String accessToken;
+    private String accountName;
     private SubscribedUserDao subscribedUserDao;
 
     private NetworkState networkState;
     private UserListingRecyclerViewAdapter.RetryLoadingMoreCallback retryLoadingMoreCallback;
 
     UserListingRecyclerViewAdapter(Context context, Retrofit oauthRetrofit, Retrofit retrofit,
-                                        SharedPreferences authInfoSharedPreferences,
-                                        SubscribedUserDao subscribedUserDao,
+                                        String accessToken, String accountName, SubscribedUserDao subscribedUserDao,
                                         UserListingRecyclerViewAdapter.RetryLoadingMoreCallback retryLoadingMoreCallback) {
         super(DIFF_CALLBACK);
         this.context = context;
         this.oauthRetrofit = oauthRetrofit;
         this.retrofit = retrofit;
-        this.authInfoSharedPreferences = authInfoSharedPreferences;
+        this.accessToken = accessToken;
+        this.accountName = accountName;
         this.subscribedUserDao = subscribedUserDao;
         this.retryLoadingMoreCallback = retryLoadingMoreCallback;
         glide = Glide.with(context.getApplicationContext());
@@ -115,7 +115,7 @@ public class UserListingRecyclerViewAdapter extends PagedListAdapter<UserData, R
 
             ((UserListingRecyclerViewAdapter.DataViewHolder) holder).UserNameTextView.setText(userData.getName());
 
-            new CheckIsFollowingUserAsyncTask(subscribedUserDao, userData.getName(),
+            new CheckIsFollowingUserAsyncTask(subscribedUserDao, userData.getName(), accountName,
                     new CheckIsFollowingUserAsyncTask.CheckIsFollowingUserListener() {
                         @Override
                         public void isSubscribed() {
@@ -127,7 +127,7 @@ public class UserListingRecyclerViewAdapter extends PagedListAdapter<UserData, R
                             ((UserListingRecyclerViewAdapter.DataViewHolder) holder).subscribeButton.setVisibility(View.VISIBLE);
                             ((UserListingRecyclerViewAdapter.DataViewHolder) holder).subscribeButton.setOnClickListener(view -> {
                                 UserFollowing.followUser(oauthRetrofit, retrofit,
-                                        authInfoSharedPreferences, userData.getName(), subscribedUserDao,
+                                        accessToken, userData.getName(), accountName, subscribedUserDao,
                                         new UserFollowing.UserFollowingListener() {
                                             @Override
                                             public void onUserFollowingSuccess() {

app/src/main/java/ml/docilealligator/infinityforreddit/ViewPostDetailActivity.java

@@ -2,7 +2,6 @@ package ml.docilealligator.infinityforreddit;
 
 import android.content.Context;
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.Menu;
@@ -59,6 +58,10 @@ public class ViewPostDetailActivity extends AppCompatActivity {
     private int orientation;
     private int postListPosition = -1;
 
+    @State
+    boolean mNullAccessToken = false;
+    @State
+    String mAccessToken;
     @State
     Post mPost;
     @State
@@ -94,8 +97,8 @@ public class ViewPostDetailActivity extends AppCompatActivity {
     @Inject @Named("oauth")
     Retrofit mOauthRetrofit;
 
-    @Inject @Named("auth_info")
-    SharedPreferences mSharedPreferences;
+    @Inject
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -121,6 +124,30 @@ public class ViewPostDetailActivity extends AppCompatActivity {
 
         orientation = getResources().getConfiguration().orientation;
 
+        if(!mNullAccessToken && mAccessToken == null) {
+            getCurrentAccountAndBindView();
+        } else {
+            bindView();
+        }
+
+        if(getIntent().hasExtra(EXTRA_POST_LIST_POSITION)) {
+            postListPosition = getIntent().getExtras().getInt(EXTRA_POST_LIST_POSITION);
+        }
+    }
+
+    private void getCurrentAccountAndBindView() {
+        new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
+            if(account == null) {
+                mNullAccessToken = true;
+            } else {
+                mAccessToken = account.getAccessToken();
+            }
+
+            bindView();
+        }).execute();
+    }
+
+    private void bindView() {
         if(mPost == null) {
             mPost = getIntent().getExtras().getParcelable(EXTRA_POST_DATA);
         }
@@ -130,7 +157,7 @@ public class ViewPostDetailActivity extends AppCompatActivity {
             fetchPostAndCommentsById(getIntent().getExtras().getString(EXTRA_POST_ID));
         } else {
             mAdapter = new CommentAndPostRecyclerViewAdapter(ViewPostDetailActivity.this, mRetrofit,
-                    mOauthRetrofit, mGlide, mSharedPreferences, mPost,
+                    mOauthRetrofit, mRedditDataRoomDatabase, mGlide, mAccessToken, mPost,
                     mPost.getSubredditNamePrefixed(), mLocale, mLoadSubredditIconAsyncTask,
                     new CommentAndPostRecyclerViewAdapter.CommentRecyclerViewAdapterCallback() {
                         @Override
@@ -163,12 +190,9 @@ public class ViewPostDetailActivity extends AppCompatActivity {
                 }
             }
         }
-
-        if(getIntent().hasExtra(EXTRA_POST_LIST_POSITION)) {
-            postListPosition = getIntent().getExtras().getInt(EXTRA_POST_LIST_POSITION);
-        }
     }
 
+
     private void fetchPostAndCommentsById(String subredditId) {
         mFetchPostInfoLinearLayout.setVisibility(View.GONE);
         mGlide.clear(mFetchPostInfoImageView);
@@ -190,7 +214,7 @@ public class ViewPostDetailActivity extends AppCompatActivity {
                             mPost = post;
 
                             mAdapter = new CommentAndPostRecyclerViewAdapter(ViewPostDetailActivity.this, mRetrofit,
-                                    mOauthRetrofit, mGlide, mSharedPreferences, mPost,
+                                    mOauthRetrofit, mRedditDataRoomDatabase, mGlide, mAccessToken, mPost,
                                     mPost.getSubredditNamePrefixed(), mLocale, mLoadSubredditIconAsyncTask,
                                     new CommentAndPostRecyclerViewAdapter.CommentRecyclerViewAdapterCallback() {
                                         @Override

app/src/main/java/ml/docilealligator/infinityforreddit/ViewSubredditDetailActivity.java

@@ -1,7 +1,6 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.view.Menu;
@@ -31,10 +30,8 @@ import javax.inject.Named;
 
 import SubredditDatabase.SubredditDao;
 import SubredditDatabase.SubredditData;
-import SubredditDatabase.SubredditRoomDatabase;
 import SubredditDatabase.SubredditViewModel;
 import SubscribedSubredditDatabase.SubscribedSubredditDao;
-import SubscribedSubredditDatabase.SubscribedSubredditRoomDatabase;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.RoundedCornersTransformation;
@@ -48,6 +45,9 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
 
     private static final String FRAGMENT_OUT_STATE_KEY = "FOSK";
     private static final String IS_IN_LAZY_MODE_STATE = "IILMS";
+    private static final String NULL_ACCESS_TOKEN_STATE = "NATS";
+    private static final String ACCESS_TOKEN_STATE = "ATS";
+    private static final String ACCOUNT_NAME_STATE = "ANS";
 
     @BindView(R.id.coordinator_layout_view_subreddit_detail_activity) CoordinatorLayout coordinatorLayout;
     @BindView(R.id.appbar_layout_view_subreddit_detail) AppBarLayout appBarLayout;
@@ -62,6 +62,9 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
     @BindView(R.id.description_text_view_view_subreddit_detail_activity) TextView descriptionTextView;
     @BindView(R.id.fab_view_subreddit_detail_activity) FloatingActionButton fab;
 
+    private boolean mNullAccessToken = false;
+    private String mAccessToken;
+    private String mAccountName;
     private String subredditName;
     private boolean subscriptionReady = false;
     private boolean isInLazyMode = false;
@@ -85,8 +88,7 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
     Retrofit mOauthRetrofit;
 
     @Inject
-    @Named("auth_info")
-    SharedPreferences sharedPreferences;
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -97,6 +99,23 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
 
         ((Infinity) getApplication()).getmAppComponent().inject(this);
 
+        if(savedInstanceState == null) {
+            getCurrentAccountAndBindView();
+        } else {
+            mNullAccessToken = savedInstanceState.getBoolean(NULL_ACCESS_TOKEN_STATE);
+            mAccessToken = savedInstanceState.getString(ACCESS_TOKEN_STATE);
+            mAccountName = savedInstanceState.getString(ACCOUNT_NAME_STATE);
+            isInLazyMode = savedInstanceState.getBoolean(IS_IN_LAZY_MODE_STATE);
+
+            if(!mNullAccessToken && mAccessToken == null) {
+                getCurrentAccountAndBindView();
+            } else {
+                bindView(false);
+                mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE_KEY);
+                getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_view_subreddit_detail_activity, mFragment).commit();
+            }
+        }
+
         postTypeBottomSheetFragment = new PostTypeBottomSheetFragment();
 
         sortTypeBottomSheetFragment = new SortTypeBottomSheetFragment();
@@ -123,10 +142,11 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
         ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) toolbar.getLayoutParams();
         params.topMargin = statusBarHeight;
 
-        subscribedSubredditDao = SubscribedSubredditRoomDatabase.getDatabase(this).subscribedSubredditDao();
+        subscribedSubredditDao = mRedditDataRoomDatabase.subscribedSubredditDao();
         glide = Glide.with(this);
 
-        mSubredditViewModel = ViewModelProviders.of(this, new SubredditViewModel.Factory(getApplication(), subredditName))
+        mSubredditViewModel = ViewModelProviders.of(this,
+                new SubredditViewModel.Factory(getApplication(), mRedditDataRoomDatabase, subredditName))
                 .get(SubredditViewModel.class);
         mSubredditViewModel.getSubredditLiveData().observe(this, subredditData -> {
             if(subredditData != null) {
@@ -183,12 +203,44 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
             }
         });
 
+        FetchSubredditData.fetchSubredditData(mRetrofit, subredditName, new FetchSubredditData.FetchSubredditDataListener() {
+            @Override
+            public void onFetchSubredditDataSuccess(SubredditData subredditData, int nCurrentOnlineSubscribers) {
+                new InsertSubredditDataAsyncTask(mRedditDataRoomDatabase, subredditData)
+                        .execute();
+                String nOnlineSubscribers = getString(R.string.online_subscribers_number_detail, nCurrentOnlineSubscribers);
+                nOnlineSubscribersTextView.setText(nOnlineSubscribers);
+            }
+
+            @Override
+            public void onFetchSubredditDataFail() {
+
+            }
+        });
+
+        fab.setOnClickListener(view -> postTypeBottomSheetFragment.show(getSupportFragmentManager(), postTypeBottomSheetFragment.getTag()));
+    }
+
+    private void getCurrentAccountAndBindView() {
+        new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
+            if(account == null) {
+                mNullAccessToken = true;
+            } else {
+                mAccessToken = account.getAccessToken();
+                mAccountName = account.getUsername();
+            }
+            bindView(true);
+        }).execute();
+    }
+
+    private void bindView(boolean initializeFragment) {
         subscribeSubredditChip.setOnClickListener(view -> {
             if(subscriptionReady) {
                 subscriptionReady = false;
                 if(subscribeSubredditChip.getText().equals(getResources().getString(R.string.subscribe))) {
-                    SubredditSubscription.subscribeToSubreddit(mOauthRetrofit, mRetrofit, sharedPreferences,
-                            subredditName, subscribedSubredditDao, new SubredditSubscription.SubredditSubscriptionListener() {
+                    SubredditSubscription.subscribeToSubreddit(mOauthRetrofit, mRetrofit, mAccessToken,
+                            subredditName, mAccountName, subscribedSubredditDao,
+                            new SubredditSubscription.SubredditSubscriptionListener() {
                                 @Override
                                 public void onSubredditSubscriptionSuccess() {
                                     subscribeSubredditChip.setText(R.string.unsubscribe);
@@ -204,8 +256,9 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
                                 }
                             });
                 } else {
-                    SubredditSubscription.unsubscribeToSubreddit(mOauthRetrofit, sharedPreferences,
-                            subredditName, subscribedSubredditDao, new SubredditSubscription.SubredditSubscriptionListener() {
+                    SubredditSubscription.unsubscribeToSubreddit(mOauthRetrofit, mAccessToken,
+                            subredditName, mAccountName, subscribedSubredditDao,
+                            new SubredditSubscription.SubredditSubscriptionListener() {
                                 @Override
                                 public void onSubredditSubscriptionSuccess() {
                                     subscribeSubredditChip.setText(R.string.subscribe);
@@ -224,63 +277,34 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
             }
         });
 
-        new CheckIsSubscribedToSubredditAsyncTask(subscribedSubredditDao, subredditName,
+        new CheckIsSubscribedToSubredditAsyncTask(subscribedSubredditDao, subredditName, mAccountName,
                 new CheckIsSubscribedToSubredditAsyncTask.CheckIsSubscribedToSubredditListener() {
-            @Override
-            public void isSubscribed() {
-                subscribeSubredditChip.setText(R.string.unsubscribe);
-                subscribeSubredditChip.setChipBackgroundColor(getResources().getColorStateList(R.color.colorAccent));
-                subscriptionReady = true;
-            }
+                    @Override
+                    public void isSubscribed() {
+                        subscribeSubredditChip.setText(R.string.unsubscribe);
+                        subscribeSubredditChip.setChipBackgroundColor(getResources().getColorStateList(R.color.colorAccent));
+                        subscriptionReady = true;
+                    }
 
-            @Override
-            public void isNotSubscribed() {
-                subscribeSubredditChip.setText(R.string.subscribe);
-                subscribeSubredditChip.setChipBackgroundColor(getResources().getColorStateList(R.color.backgroundColorPrimaryDark));
-                subscriptionReady = true;
-            }
-        }).execute();
+                    @Override
+                    public void isNotSubscribed() {
+                        subscribeSubredditChip.setText(R.string.subscribe);
+                        subscribeSubredditChip.setChipBackgroundColor(getResources().getColorStateList(R.color.backgroundColorPrimaryDark));
+                        subscriptionReady = true;
+                    }
+                }).execute();
 
-        FetchSubredditData.fetchSubredditData(mRetrofit, subredditName, new FetchSubredditData.FetchSubredditDataListener() {
-            @Override
-            public void onFetchSubredditDataSuccess(SubredditData subredditData, int nCurrentOnlineSubscribers) {
-                new InsertSubredditDataAsyncTask(SubredditRoomDatabase.getDatabase(ViewSubredditDetailActivity.this), subredditData)
-                        .execute();
-                String nOnlineSubscribers = getString(R.string.online_subscribers_number_detail, nCurrentOnlineSubscribers);
-                nOnlineSubscribersTextView.setText(nOnlineSubscribers);
-            }
-
-            @Override
-            public void onFetchSubredditDataFail() {
-
-            }
-        });
-
-        if(savedInstanceState == null) {
+        if(initializeFragment) {
             mFragment = new PostFragment();
             Bundle bundle = new Bundle();
             bundle.putString(PostFragment.EXTRA_NAME, subredditName);
             bundle.putInt(PostFragment.EXTRA_POST_TYPE, PostDataSource.TYPE_SUBREDDIT);
             bundle.putString(PostFragment.EXTRA_SORT_TYPE, PostDataSource.SORT_TYPE_BEST);
             bundle.putInt(PostFragment.EXTRA_FILTER, PostFragment.EXTRA_NO_FILTER);
+            bundle.putString(PostFragment.EXTRA_ACCESS_TOKEN, mAccessToken);
             mFragment.setArguments(bundle);
             getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_view_subreddit_detail_activity, mFragment).commit();
-        } else {
-            mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE_KEY);
-            if(mFragment == null) {
-                mFragment = new PostFragment();
-                Bundle bundle = new Bundle();
-                bundle.putString(PostFragment.EXTRA_NAME, subredditName);
-                bundle.putInt(PostFragment.EXTRA_POST_TYPE, PostDataSource.TYPE_SUBREDDIT);
-                bundle.putString(PostFragment.EXTRA_SORT_TYPE, PostDataSource.SORT_TYPE_BEST);
-                bundle.putInt(PostFragment.EXTRA_FILTER, PostFragment.EXTRA_NO_FILTER);
-                mFragment.setArguments(bundle);
-            }
-            isInLazyMode = savedInstanceState.getBoolean(IS_IN_LAZY_MODE_STATE);
-            getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_view_subreddit_detail_activity, mFragment).commit();
         }
-
-        fab.setOnClickListener(view -> postTypeBottomSheetFragment.show(getSupportFragmentManager(), postTypeBottomSheetFragment.getTag()));
     }
 
     @Override
@@ -347,6 +371,9 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
     protected void onSaveInstanceState(@NonNull Bundle outState) {
         super.onSaveInstanceState(outState);
         outState.putBoolean(IS_IN_LAZY_MODE_STATE, isInLazyMode);
+        outState.putBoolean(NULL_ACCESS_TOKEN_STATE, mNullAccessToken);
+        outState.putString(ACCESS_TOKEN_STATE, mAccessToken);
+        outState.putString(ACCOUNT_NAME_STATE, mAccountName);
         getSupportFragmentManager().putFragment(outState, FRAGMENT_OUT_STATE_KEY, mFragment);
     }
 
@@ -390,8 +417,8 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
         private SubredditDao mSubredditDao;
         private SubredditData subredditData;
 
-        InsertSubredditDataAsyncTask(SubredditRoomDatabase subredditDb, SubredditData subredditData) {
-            mSubredditDao = subredditDb.subredditDao();
+        InsertSubredditDataAsyncTask(RedditDataRoomDatabase db, SubredditData subredditData) {
+            mSubredditDao = db.subredditDao();
             this.subredditData = subredditData;
         }
 

app/src/main/java/ml/docilealligator/infinityforreddit/ViewUserDetailActivity.java

@@ -1,7 +1,6 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.view.Menu;
@@ -33,10 +32,8 @@ import javax.inject.Inject;
 import javax.inject.Named;
 
 import SubscribedUserDatabase.SubscribedUserDao;
-import SubscribedUserDatabase.SubscribedUserRoomDatabase;
 import User.UserDao;
 import User.UserData;
-import User.UserRoomDatabase;
 import User.UserViewModel;
 import butterknife.BindView;
 import butterknife.ButterKnife;
@@ -48,6 +45,9 @@ public class ViewUserDetailActivity extends AppCompatActivity {
 
     public static final String EXTRA_USER_NAME_KEY = "EUNK";
 
+    private static final String NULL_ACCESS_TOKEN_STATE = "NATS";
+    private static final String ACCESS_TOKEN_STATE = "ATS";
+    private static final String ACCOUNT_NAME_STATE = "ANS";
     private static final String IS_IN_LAZY_MODE_STATE = "IILMS";
 
     @BindView(R.id.coordinator_layout_view_user_detail_activity) CoordinatorLayout coordinatorLayout;
@@ -69,6 +69,9 @@ public class ViewUserDetailActivity extends AppCompatActivity {
     private Menu mMenu;
     private AppBarLayout.LayoutParams params;
 
+    private boolean mNullAccessToken = false;
+    private String mAccessToken;
+    private String mAccountName;
     private String username;
     private boolean subscriptionReady = false;
     private boolean isInLazyMode = false;
@@ -88,8 +91,7 @@ public class ViewUserDetailActivity extends AppCompatActivity {
     Retrofit mOauthRetrofit;
 
     @Inject
-    @Named("auth_info")
-    SharedPreferences sharedPreferences;
+    RedditDataRoomDatabase mRedditDataRoomDatabase;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -100,6 +102,23 @@ public class ViewUserDetailActivity extends AppCompatActivity {
 
         ((Infinity) getApplication()).getmAppComponent().inject(this);
 
+        if(savedInstanceState == null) {
+            getCurrentAccountAndInitializeViewPager();
+        } else {
+            mNullAccessToken = savedInstanceState.getBoolean(NULL_ACCESS_TOKEN_STATE);
+            mAccessToken = savedInstanceState.getString(ACCESS_TOKEN_STATE);
+            mAccountName = savedInstanceState.getString(ACCOUNT_NAME_STATE);
+            isInLazyMode = savedInstanceState.getBoolean(IS_IN_LAZY_MODE_STATE);
+
+            if(!mNullAccessToken && mAccessToken == null) {
+                getCurrentAccountAndInitializeViewPager();
+            } else {
+                initializeViewPager();
+            }
+        }
+
+        getCurrentAccountAndInitializeViewPager();
+
         params = (AppBarLayout.LayoutParams) collapsingToolbarLayout.getLayoutParams();
 
         //Get status bar height
@@ -120,11 +139,6 @@ public class ViewUserDetailActivity extends AppCompatActivity {
         ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) toolbar.getLayoutParams();
         params.topMargin = statusBarHeight;
 
-        sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
-        viewPager.setAdapter(sectionsPagerAdapter);
-        viewPager.setOffscreenPageLimit(2);
-        tabLayout.setupWithViewPager(viewPager);
-
         expandedTabTextColor = getResources().getColor(R.color.tabLayoutWithExpandedCollapsingToolbarTextColor);
         expandedTabBackgroundColor = getResources().getColor(R.color.tabLayoutWithExpandedCollapsingToolbarTabBackground);
         expandedTabIndicatorColor = getResources().getColor(R.color.tabLayoutWithExpandedCollapsingToolbarTabIndicator);
@@ -148,10 +162,10 @@ public class ViewUserDetailActivity extends AppCompatActivity {
             }
         });
 
-        subscribedUserDao = SubscribedUserRoomDatabase.getDatabase(this).subscribedUserDao();
+        subscribedUserDao = mRedditDataRoomDatabase.subscribedUserDao();
         glide = Glide.with(this);
 
-        userViewModel = ViewModelProviders.of(this, new UserViewModel.Factory(getApplication(), username))
+        userViewModel = ViewModelProviders.of(this, new UserViewModel.Factory(getApplication(), mRedditDataRoomDatabase, username))
                 .get(UserViewModel.class);
         userViewModel.getUserLiveData().observe(this, userData -> {
             if(userData != null) {
@@ -199,8 +213,8 @@ public class ViewUserDetailActivity extends AppCompatActivity {
                         if(subscriptionReady) {
                             subscriptionReady = false;
                             if(subscribeUserChip.getText().equals(getResources().getString(R.string.follow))) {
-                                UserFollowing.followUser(mOauthRetrofit, mRetrofit, sharedPreferences,
-                                        username, subscribedUserDao, new UserFollowing.UserFollowingListener() {
+                                UserFollowing.followUser(mOauthRetrofit, mRetrofit, mAccessToken,
+                                        username, mAccountName, subscribedUserDao, new UserFollowing.UserFollowingListener() {
                                             @Override
                                             public void onUserFollowingSuccess() {
                                                 subscribeUserChip.setText(R.string.unfollow);
@@ -216,8 +230,8 @@ public class ViewUserDetailActivity extends AppCompatActivity {
                                             }
                                         });
                             } else {
-                                UserFollowing.unfollowUser(mOauthRetrofit, mRetrofit, sharedPreferences,
-                                        username, subscribedUserDao, new UserFollowing.UserFollowingListener() {
+                                UserFollowing.unfollowUser(mOauthRetrofit, mRetrofit, mAccessToken,
+                                        username, mAccountName, subscribedUserDao, new UserFollowing.UserFollowingListener() {
                                             @Override
                                             public void onUserFollowingSuccess() {
                                                 subscribeUserChip.setText(R.string.follow);
@@ -236,7 +250,7 @@ public class ViewUserDetailActivity extends AppCompatActivity {
                         }
                     });
 
-                    new CheckIsFollowingUserAsyncTask(subscribedUserDao, username, new CheckIsFollowingUserAsyncTask.CheckIsFollowingUserListener() {
+                    new CheckIsFollowingUserAsyncTask(subscribedUserDao, username, mAccountName, new CheckIsFollowingUserAsyncTask.CheckIsFollowingUserListener() {
                         @Override
                         public void isSubscribed() {
                             subscribeUserChip.setText(R.string.unfollow);
@@ -268,7 +282,7 @@ public class ViewUserDetailActivity extends AppCompatActivity {
         FetchUserData.fetchUserData(mRetrofit, username, new FetchUserData.FetchUserDataListener() {
             @Override
             public void onFetchUserDataSuccess(UserData userData) {
-                new InsertUserDataAsyncTask(UserRoomDatabase.getDatabase(ViewUserDetailActivity.this).userDao(), userData).execute();
+                new InsertUserDataAsyncTask(mRedditDataRoomDatabase.userDao(), userData).execute();
             }
 
             @Override
@@ -276,26 +290,25 @@ public class ViewUserDetailActivity extends AppCompatActivity {
                 makeSnackbar(R.string.cannot_fetch_user_info);
             }
         });
+    }
 
-        if(savedInstanceState == null) {
-            /*mFragment = new PostFragment();
-            Bundle bundle = new Bundle();
-            bundle.putString(PostFragment.EXTRA_NAME, username);
-            bundle.putInt(PostFragment.EXTRA_POST_TYPE, PostDataSource.TYPE_USER);
-            mFragment.setArguments(bundle);
-            getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_view_user_detail_activity, mFragment).commit();*/
-        } else {
-            /*mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE_KEY);
-            if(mFragment == null) {
-                mFragment = new PostFragment();
-                Bundle bundle = new Bundle();
-                bundle.putString(PostFragment.EXTRA_NAME, username);
-                bundle.putInt(PostFragment.EXTRA_POST_TYPE, PostDataSource.TYPE_USER);
-                mFragment.setArguments(bundle);
-            }*/
-            isInLazyMode = savedInstanceState.getBoolean(IS_IN_LAZY_MODE_STATE);
-            //getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_view_user_detail_activity, mFragment).commit();
-        }
+    private void getCurrentAccountAndInitializeViewPager() {
+        new GetCurrentAccountAsyncTask(mRedditDataRoomDatabase.accountDao(), account -> {
+            if(account == null) {
+                mNullAccessToken = true;
+            } else {
+                mAccessToken = account.getAccessToken();
+                mAccountName = account.getUsername();
+            }
+            initializeViewPager();
+        }).execute();
+    }
+
+    private void initializeViewPager() {
+        sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
+        viewPager.setAdapter(sectionsPagerAdapter);
+        viewPager.setOffscreenPageLimit(2);
+        tabLayout.setupWithViewPager(viewPager);
     }
 
     @Override
@@ -318,7 +331,7 @@ public class ViewUserDetailActivity extends AppCompatActivity {
     }
 
     @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
+    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
         switch (item.getItemId()) {
             case android.R.id.home:
                 finish();
@@ -359,7 +372,9 @@ public class ViewUserDetailActivity extends AppCompatActivity {
     protected void onSaveInstanceState(@NonNull Bundle outState) {
         super.onSaveInstanceState(outState);
         outState.putBoolean(IS_IN_LAZY_MODE_STATE, isInLazyMode);
-        //getSupportFragmentManager().putFragment(outState, FRAGMENT_OUT_STATE_KEY, mFragment);
+        outState.putBoolean(NULL_ACCESS_TOKEN_STATE, mNullAccessToken);
+        outState.putString(ACCESS_TOKEN_STATE, mAccessToken);
+        outState.putString(ACCOUNT_NAME_STATE, mAccountName);
     }
 
     private void makeSnackbar(int resId) {
@@ -438,12 +453,14 @@ public class ViewUserDetailActivity extends AppCompatActivity {
                 bundle.putInt(PostFragment.EXTRA_POST_TYPE, PostDataSource.TYPE_USER);
                 bundle.putString(PostFragment.EXTRA_USER_NAME, username);
                 bundle.putInt(PostFragment.EXTRA_FILTER, PostFragment.EXTRA_NO_FILTER);
+                bundle.putString(PostFragment.EXTRA_ACCESS_TOKEN, mAccessToken);
                 fragment.setArguments(bundle);
                 return fragment;
             }
             CommentsListingFragment fragment = new CommentsListingFragment();
             Bundle bundle = new Bundle();
             bundle.putString(CommentsListingFragment.EXTRA_USERNAME_KEY, username);
+            bundle.putString(CommentsListingFragment.EXTRA_ACCESS_TOKEN, mAccessToken);
             fragment.setArguments(bundle);
             return fragment;
         }

app/src/main/java/ml/docilealligator/infinityforreddit/VoteThing.java

@@ -1,6 +1,5 @@
 package ml.docilealligator.infinityforreddit;
 
-import android.content.SharedPreferences;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
@@ -28,12 +27,11 @@ class VoteThing {
         void onVoteThingFail();
     }
 
-    static void voteThing(final Retrofit retrofit, SharedPreferences authInfoSharedPreferences,
+    static void voteThing(final Retrofit retrofit, String accessToken,
                           final VoteThingListener voteThingListener, final String fullName,
                           final String point, final int position) {
             RedditAPI api = retrofit.create(RedditAPI.class);
 
-            String accessToken = authInfoSharedPreferences.getString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, "");
             Map<String, String> params = new HashMap<>();
             params.put(RedditUtils.DIR_KEY, point);
             params.put(RedditUtils.ID_KEY, fullName);
@@ -58,12 +56,11 @@ class VoteThing {
             });
     }
 
-    static void voteThing(final Retrofit retrofit, SharedPreferences authInfoSharedPreferences,
+    static void voteThing(final Retrofit retrofit, String accessToken,
                           final VoteThingWithoutPositionListener voteThingWithoutPositionListener,
                           final String fullName, final String point) {
             RedditAPI api = retrofit.create(RedditAPI.class);
 
-            String accessToken = authInfoSharedPreferences.getString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, "");
             Map<String, String> params = new HashMap<>();
             params.put(RedditUtils.DIR_KEY, point);
             params.put(RedditUtils.ID_KEY, fullName);

app/src/main/res/layout/activity_comment.xml

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/coordinator_layout_comment_activity"
-    tools:context=".CommentActivity">
+    tools:application=".CommentActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/activity_filtered_posts.xml

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".FilteredPostsActivity">
+    tools:application=".FilteredPostsActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/activity_login.xml

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context="ml.docilealligator.infinityforreddit.LoginActivity">
+    tools:application="ml.docilealligator.infinityforreddit.LoginActivity">
 
     <WebView
         android:id="@+id/webview_login_activity"

app/src/main/res/layout/activity_post_image.xml

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/coordinator_layout_post_image_activity"
-    tools:context=".PostImageActivity">
+    tools:application=".PostImageActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/activity_post_link.xml

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/coordinator_layout_post_link_activity"
-    tools:context=".PostTextActivity">
+    tools:application=".PostTextActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/activity_post_text.xml

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/coordinator_layout_post_text_activity"
-    tools:context=".PostTextActivity">
+    tools:application=".PostTextActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/activity_post_video.xml

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/coordinator_layout_post_video_activity"
-    tools:context=".PostImageActivity">
+    tools:application=".PostImageActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/activity_rules.xml

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".RulesActivity">
+    tools:application=".RulesActivity">
 
     <ProgressBar
         android:id="@+id/progress_bar_rules_activity"

app/src/main/res/layout/activity_search.xml

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".SearchActivity">
+    tools:application=".SearchActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/activity_search_result.xml

@@ -67,6 +67,6 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         app:layout_behavior="@string/appbar_scrolling_view_behavior"
-        tools:context=".SearchResultActivity" />
+        tools:application=".SearchResultActivity" />
 
 </androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/activity_search_subreddits_result.xml

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".SearchSubredditsResultActivity">
+    tools:application=".SearchSubredditsResultActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/activity_subreddit_selection.xml

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".SubredditSelectionActivity">
+    tools:application=".SubredditSelectionActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/activity_subscribed_thing_listing.xml

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".SubscribedThingListingActivity">
+    tools:application=".SubscribedThingListingActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar_subscribed_thing_listing_activity"
@@ -40,6 +40,6 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         app:layout_behavior="@string/appbar_scrolling_view_behavior"
-        tools:context=".SubscribedThingListingActivity" />
+        tools:application=".SubscribedThingListingActivity" />
 
 </androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/activity_view_image.xml

@@ -6,7 +6,7 @@
     android:layout_height="match_parent"
     android:id="@+id/parent_relative_layout_view_image_activity"
     android:background="@android:color/black"
-    tools:context="ml.docilealligator.infinityforreddit.ViewImageActivity">
+    tools:application="ml.docilealligator.infinityforreddit.ViewImageActivity">
 
     <ProgressBar
         android:id="@+id/progress_bar_view_image_activity"

app/src/main/res/layout/activity_view_post_detail.xml

@@ -5,7 +5,7 @@
     android:id="@+id/coordinator_layout_view_post_detail"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".ViewPostDetailActivity">
+    tools:application=".ViewPostDetailActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/activity_view_subreddit_detail.xml

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/coordinator_layout_view_subreddit_detail_activity"
-    tools:context=".ViewSubredditDetailActivity">
+    tools:application=".ViewSubredditDetailActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar_layout_view_subreddit_detail"

app/src/main/res/layout/activity_view_user_detail.xml

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/coordinator_layout_view_user_detail_activity"
-    tools:context=".ViewUserDetailActivity">
+    tools:application=".ViewUserDetailActivity">
 
     <androidx.viewpager.widget.ViewPager
         android:id="@+id/view_pager_view_user_detail_activity"

app/src/main/res/layout/activity_view_video.xml

@@ -7,7 +7,7 @@
     android:background="@android:color/black"
     android:id="@+id/relative_layout_view_video_activity"
     android:keepScreenOn="true"
-    tools:context="ml.docilealligator.infinityforreddit.ViewVideoActivity">
+    tools:application="ml.docilealligator.infinityforreddit.ViewVideoActivity">
 
     <com.google.android.exoplayer2.ui.PlayerView
         android:id="@+id/player_view_view_video_activity"

app/src/main/res/layout/app_bar_main.xml

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context="ml.docilealligator.infinityforreddit.MainActivity">
+    tools:application="ml.docilealligator.infinityforreddit.MainActivity">
 
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"

app/src/main/res/layout/content_main.xml

@@ -6,5 +6,5 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     app:layout_behavior="@string/appbar_scrolling_view_behavior"
-    tools:context="ml.docilealligator.infinityforreddit.MainActivity"
+    tools:application="ml.docilealligator.infinityforreddit.MainActivity"
     tools:showIn="@layout/app_bar_main" />

app/src/main/res/layout/content_view_subreddit_detail.xml

@@ -6,5 +6,5 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     app:layout_behavior="@string/appbar_scrolling_view_behavior"
-    tools:context=".ViewSubredditDetailActivity"
+    tools:application=".ViewSubredditDetailActivity"
     tools:showIn="@layout/activity_view_subreddit_detail" />

app/src/main/res/layout/content_view_user_detail.xml

@@ -6,5 +6,5 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     app:layout_behavior="@string/appbar_scrolling_view_behavior"
-    tools:context=".ViewUserDetailActivity"
+    tools:application=".ViewUserDetailActivity"
     tools:showIn="@layout/activity_view_user_detail" />

app/src/main/res/layout/fragment_comments_listing.xml

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/coordinator_layout_comments_listing_fragment"
-    tools:context="ml.docilealligator.infinityforreddit.CommentsListingFragment">
+    tools:application="ml.docilealligator.infinityforreddit.CommentsListingFragment">
 
     <com.lsjwzh.widget.materialloadingprogressbar.CircleProgressBar
         android:id="@+id/progress_bar_comments_listing_fragment"

app/src/main/res/layout/fragment_flair_bottom_sheet.xml

@@ -4,7 +4,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
-    tools:context=".FlairBottomSheetFragment">
+    tools:application=".FlairBottomSheetFragment">
 
     <TextView
         android:layout_width="match_parent"

app/src/main/res/layout/fragment_followed_users_listing.xml

@@ -3,7 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".FollowedUsersListingFragment">
+    tools:application=".FollowedUsersListingFragment">
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view_followed_users_listing_fragment"

app/src/main/res/layout/fragment_post.xml

@@ -4,7 +4,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/coordinator_layout_post_fragment"
-    tools:context="ml.docilealligator.infinityforreddit.PostFragment">
+    tools:application="ml.docilealligator.infinityforreddit.PostFragment">
 
     <com.lsjwzh.widget.materialloadingprogressbar.CircleProgressBar
         android:id="@+id/progress_bar_post_fragment"

app/src/main/res/layout/fragment_subreddit_listing.xml

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    tools:context=".SubredditListingFragment">
+    tools:application=".SubredditListingFragment">
 
     <com.lsjwzh.widget.materialloadingprogressbar.CircleProgressBar
         android:id="@+id/progress_bar_subreddit_listing_fragment"

app/src/main/res/layout/fragment_subscribed_subreddits_listing.xml

@@ -3,7 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".SubscribedSubredditsListingFragment">
+    tools:application=".SubscribedSubredditsListingFragment">
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view_subscribed_subreddits_listing_fragment"

app/src/main/res/layout/fragment_user_listing.xml

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    tools:context=".UserListingFragment">
+    tools:application=".UserListingFragment">
 
     <com.lsjwzh.widget.materialloadingprogressbar.CircleProgressBar
         android:id="@+id/progress_bar_user_listing_fragment"

app/src/main/res/menu/main_activity.xml

@@ -2,7 +2,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    tools:context="ml.docilealligator.infinityforreddit.MainActivity">
+    tools:application="ml.docilealligator.infinityforreddit.MainActivity">
     <item
         android:id="@+id/action_sort_main_activity"
         android:orderInCategory="1"

app/src/main/res/menu/menu_search.xml

@@ -1,7 +1,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    tools:context="ml.docilealligator.infinityforreddit.SearchResultActivity">
+    tools:application="ml.docilealligator.infinityforreddit.SearchResultActivity">
     <item
         android:id="@+id/action_search_search_activity"
         android:orderInCategory="1"

app/src/main/res/menu/search_activity.xml

@@ -2,7 +2,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    tools:context="ml.docilealligator.infinityforreddit.SearchResultActivity">
+    tools:application="ml.docilealligator.infinityforreddit.SearchResultActivity">
     <item
         android:id="@+id/action_search_search_activity"
         android:orderInCategory="1"

app/src/main/res/menu/view_subreddit_detail_activity.xml

@@ -2,7 +2,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    tools:context="ml.docilealligator.infinityforreddit.ViewSubredditDetailActivity">
+    tools:application="ml.docilealligator.infinityforreddit.ViewSubredditDetailActivity">
     <item
         android:id="@+id/action_sort_view_subreddit_detail_activity"
         android:orderInCategory="1"

app/src/main/res/menu/view_user_detail_activity.xml

@@ -1,7 +1,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    tools:context="ml.docilealligator.infinityforreddit.ViewUserDetailActivity">
+    tools:application="ml.docilealligator.infinityforreddit.ViewUserDetailActivity">
     <item
         android:id="@+id/action_search_view_user_detail_activity"
         android:orderInCategory="1"