Switch between all logged-in reddit accounts is available.

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

@@ -35,6 +35,9 @@ public interface AccountDao {
             "karma = :karma WHERE username = :username")
     void updateAccountInfo(String username, String profileImageUrl, String bannerImageUrl, int karma);
 
-    @Query("SELECT * FROM accounts WHERE username != :username")
+    @Query("SELECT * FROM accounts WHERE is_current_user = 0 ORDER BY username COLLATE NOCASE ASC")
-    LiveData<List<Account>> getAccountsExceptCurrentAccountLiveData(String username);
+    LiveData<List<Account>> getAccountsExceptCurrentAccountLiveData();
+
+    @Query("UPDATE accounts SET is_current_user = 1 WHERE username = :username")
+    void markAccountCurrent(String username);
 }

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

@@ -16,7 +16,7 @@ public class AccountRepository {
     AccountRepository(RedditDataRoomDatabase redditDataRoomDatabase, String username) {
         mAccountDao = redditDataRoomDatabase.accountDao();
         mAccountLiveData = mAccountDao.getAccountLiveData(username);
-        mAccountsExceptCurrentAccountLiveData = mAccountDao.getAccountsExceptCurrentAccountLiveData(username);
+        mAccountsExceptCurrentAccountLiveData = mAccountDao.getAccountsExceptCurrentAccountLiveData();
     }
 
     LiveData<Account> getAccountLiveData() {

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

@@ -191,7 +191,7 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
                 new AccountRecyclerViewAdapter.ItemSelectedListener() {
             @Override
             public void accountSelected(Account account) {
-
+                new SwitchAccountAsyncTask(mRedditDataRoomDatabase, account.getUsername(), () -> relaunchActivity()).execute();
             }
 
             @Override
@@ -349,13 +349,17 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
         }
     }
 
+    private void relaunchActivity() {
+        Intent intent = getIntent();
+        finish();
+        startActivity(intent);
+        overridePendingTransition(0, 0);
+    }
+
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         if(requestCode == LOGIN_ACTIVITY_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
-            Intent intent = getIntent();
+            relaunchActivity();
-            finish();
-            startActivity(intent);
-            overridePendingTransition(0, 0);
         }
 
         super.onActivityResult(requestCode, resultCode, data);

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

@@ -0,0 +1,32 @@
+package ml.docilealligator.infinityforreddit;
+
+import android.os.AsyncTask;
+
+class SwitchAccountAsyncTask extends AsyncTask<Void, Void, Void> {
+    interface SwitchAccountAsyncTaskListener {
+        void switched();
+    }
+
+    private RedditDataRoomDatabase redditDataRoomDatabase;
+    private String newAccountName;
+    private SwitchAccountAsyncTaskListener switchAccountAsyncTaskListener;
+
+    SwitchAccountAsyncTask(RedditDataRoomDatabase redditDataRoomDatabase, String newAccountName,
+                           SwitchAccountAsyncTaskListener switchAccountAsyncTaskListener) {
+        this.redditDataRoomDatabase = redditDataRoomDatabase;
+        this.newAccountName = newAccountName;
+        this.switchAccountAsyncTaskListener = switchAccountAsyncTaskListener;
+    }
+
+    @Override
+    protected Void doInBackground(Void... voids) {
+        redditDataRoomDatabase.accountDao().markAllAccountsNonCurrent();
+        redditDataRoomDatabase.accountDao().markAccountCurrent(newAccountName);
+        return null;
+    }
+
+    @Override
+    protected void onPostExecute(Void aVoid) {
+        switchAccountAsyncTaskListener.switched();
+    }
+}