Fetch the subreddit info and save it to the database. Solve a bug that cannot create a instance of SubredditViewModel.

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

@@ -62,4 +62,5 @@ class JSONUtils {
     static final String SUBSCRIBERS_KEY = "subscribers";
     static final String PUBLIC_DESCRIPTION = "public_description";
     static final String ACTIVE_USER_COUNT = "active_user_count";
+    static final String DISPLAY_NAME_PREFIXED = "display_name_prefixed";
 }

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

@@ -202,10 +202,6 @@ public class MainActivity extends AppCompatActivity {
                                 SubscribedUserRoomDatabase.getDatabase(MainActivity.this),
                                 subscribedSubredditData,
                                 subscribedUserData).execute();
-
-                        /*new InsertSubscribedUsersAsyncTask(
-                                SubscribedUserRoomDatabase.getDatabase(MainActivity.this),
-                                subscribedUserData).execute();*/
                     }
 
                     @Override
@@ -282,23 +278,4 @@ public class MainActivity extends AppCompatActivity {
             return null;
         }
     }
-
-    /*private static class InsertSubscribedUsersAsyncTask extends AsyncTask<Void, Void, Void> {
-
-        private final SubscribedUserDao mDao;
-        private List<SubscribedUserData> subscribedUserData;
-
-        InsertSubscribedUsersAsyncTask(SubscribedUserRoomDatabase db, List<SubscribedUserData> subscribedUserData) {
-            mDao = db.subscribedUserDao();
-            this.subscribedUserData = subscribedUserData;
-        }
-
-        @Override
-        protected Void doInBackground(final Void... params) {
-            for(SubscribedUserData s : subscribedUserData) {
-                mDao.insert(s);
-            }
-            return null;
-        }
-    }*/
 }

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

@@ -8,7 +8,7 @@ import org.json.JSONObject;
 
 class ParseSubredditData {
     interface ParseSubredditDataListener {
-        void onParseSubredditDataSuccess();
+        void onParseSubredditDataSuccess(SubredditData subredditData, int nCurrentOnlineSubscribers);
         void onParseSubredditDataFail();
     }
 
@@ -23,6 +23,8 @@ class ParseSubredditData {
         private JSONObject jsonResponse;
         private boolean parseFailed;
         private ParseSubredditDataListener parseSubredditDataListener;
+        private SubredditData subredditData;
+        private int mNCurrentOnlineSubscribers;
 
         ParseSubredditDataAsyncTask(String response, ParseSubredditDataListener parseSubredditDataListener){
             this.parseSubredditDataListener = parseSubredditDataListener;
@@ -40,11 +42,14 @@ class ParseSubredditData {
             try {
                 JSONObject data = jsonResponse.getJSONObject(JSONUtils.DATA_KEY);
                 String id = data.getString(JSONUtils.NAME_KEY);
+                String subredditFullName = data.getString(JSONUtils.DISPLAY_NAME_PREFIXED);
                 String description = data.getString(JSONUtils.PUBLIC_DESCRIPTION);
                 String bannerImageUrl = data.getString(JSONUtils.BANNER_IMG_KEY);
                 String iconImageUrl = data.getString(JSONUtils.ICON_IMG_KEY);
                 int nSubscribers = data.getInt(JSONUtils.SUBSCRIBERS_KEY);
                 int nCurrentOnlineSubscribers = data.getInt(JSONUtils.ACTIVE_USER_COUNT);
+                subredditData = new SubredditData(id, subredditFullName, iconImageUrl, bannerImageUrl, description, nSubscribers);
+                mNCurrentOnlineSubscribers = nCurrentOnlineSubscribers;
             } catch (JSONException e) {
                 parseFailed = true;
                 Log.i("parse", "SubredditData error");
@@ -56,7 +61,7 @@ class ParseSubredditData {
         @Override
         protected void onPostExecute(Void aVoid) {
             if(!parseFailed) {
-                parseSubredditDataListener.onParseSubredditDataSuccess();
+                parseSubredditDataListener.onParseSubredditDataSuccess(subredditData, mNCurrentOnlineSubscribers);
             } else {
                 parseSubredditDataListener.onParseSubredditDataFail();
             }

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

@@ -57,7 +57,7 @@ class SubredditData {
         return description;
     }
 
-    public int getnSubscribers() {
+    public int getNSubscribers() {
         return nSubscribers;
     }
 }

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

@@ -3,6 +3,9 @@ package ml.docilealligator.infinityforreddit;
 import android.app.Application;
 import android.arch.lifecycle.AndroidViewModel;
 import android.arch.lifecycle.LiveData;
+import android.arch.lifecycle.ViewModel;
+import android.arch.lifecycle.ViewModelProvider;
+import android.support.annotation.NonNull;
 
 public class SubredditViewModel extends AndroidViewModel {
     private SubredditRepository mSubredditRepository;
@@ -21,4 +24,23 @@ public class SubredditViewModel extends AndroidViewModel {
     public void insert(SubredditData subredditData) {
         mSubredditRepository.insert(subredditData);
     }
+
+    public static class Factory extends ViewModelProvider.NewInstanceFactory {
+
+        @NonNull
+        private final Application mApplication;
+
+        private final String id;
+
+        public Factory(@NonNull Application application, String id) {
+            mApplication = application;
+            this.id = id;
+        }
+
+        @Override
+        public <T extends ViewModel> T create(Class<T> modelClass) {
+            //noinspection unchecked
+            return (T) new SubredditViewModel(mApplication, id);
+        }
+    }
 }

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

@@ -33,11 +33,13 @@ class SubscribedSubredditRecyclerViewAdapter extends RecyclerView.Adapter<Recycl
     }
 
     @Override
-    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
+    public void onBindViewHolder(@NonNull final RecyclerView.ViewHolder viewHolder, final int i) {
         viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
                 Intent intent = new Intent(mContext, ViewSubredditDetailActivity.class);
+                intent.putExtra(ViewSubredditDetailActivity.EXTRA_SUBREDDIT_NAME, mSubscribedSubredditData.get(viewHolder.getAdapterPosition()).getName());
+                intent.putExtra(ViewSubredditDetailActivity.EXTRA_SUBREDDIT_ID, mSubscribedSubredditData.get(viewHolder.getAdapterPosition()).getId());
                 mContext.startActivity(intent);
             }
         });

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

@@ -1,16 +1,31 @@
 package ml.docilealligator.infinityforreddit;
 
+import android.arch.lifecycle.Observer;
+import android.arch.lifecycle.ViewModelProviders;
+import android.os.AsyncTask;
 import android.os.Bundle;
+import android.support.annotation.Nullable;
 import android.support.design.widget.AppBarLayout;
 import android.support.design.widget.CollapsingToolbarLayout;
-import android.support.design.widget.FloatingActionButton;
-import android.support.design.widget.Snackbar;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
-import android.view.View;
+import android.widget.ImageView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.android.volley.toolbox.Volley;
+import com.bumptech.glide.Glide;
+import com.bumptech.glide.RequestManager;
+
+import de.hdodenhof.circleimageview.CircleImageView;
 
 public class ViewSubredditDetailActivity extends AppCompatActivity {
 
+    static final String EXTRA_SUBREDDIT_NAME = "ESN";
+    static final String EXTRA_SUBREDDIT_ID = "ESI";
+
+    private SubredditViewModel mSubredditViewModel;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -18,6 +33,8 @@ public class ViewSubredditDetailActivity extends AppCompatActivity {
         Toolbar toolbar = findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
+        String id = getIntent().getExtras().getString(EXTRA_SUBREDDIT_ID);
+        final String subredditName = getIntent().getExtras().getString(EXTRA_SUBREDDIT_NAME);
         final CollapsingToolbarLayout collapsingToolbarLayout = findViewById(R.id.collapsing_toolbar_layout_view_subreddit_detail_activity);
         AppBarLayout appBarLayout = findViewById(R.id.app_bar_layout_view_subreddit_detail_activity);
         appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
@@ -30,7 +47,7 @@ public class ViewSubredditDetailActivity extends AppCompatActivity {
                     scrollRange = appBarLayout.getTotalScrollRange();
                 }
                 if (scrollRange + verticalOffset == 0) {
-                    collapsingToolbarLayout.setTitle(getString(R.string.title_activity_view_subreddit_detail));
+                    collapsingToolbarLayout.setTitle(subredditName);
                     isShow = true;
                 } else if(isShow) {
                     collapsingToolbarLayout.setTitle(" ");//carefull there should a space between double quote otherwise it wont work
@@ -39,13 +56,78 @@ public class ViewSubredditDetailActivity extends AppCompatActivity {
             }
         });
 
-        FloatingActionButton fab = findViewById(R.id.fab);
+        final ImageView bannerImageView = findViewById(R.id.banner_image_view_view_subreddit_detail_activity);
-        fab.setOnClickListener(new View.OnClickListener() {
+        final CircleImageView iconCircleImageView = findViewById(R.id.icon_circle_image_view_view_subreddit_detail_activity);
+        final TextView subredditNameTextView = findViewById(R.id.subreddit_name_text_view_view_subreddit_detail_activity);
+        final TextView nSubscribersTextView = findViewById(R.id.subscriber_count_text_view_view_subreddit_detail_activity);
+        final TextView nOnlineSubscribersTextView = findViewById(R.id.online_subscriber_count_text_view_view_subreddit_detail_activity);
+        final TextView descriptionTextView = findViewById(R.id.description_text_view_view_subreddit_detail_activity);
+        final RequestManager glide = Glide.with(ViewSubredditDetailActivity.this);
+
+        SubredditViewModel.Factory factory = new SubredditViewModel.Factory(getApplication(), id);
+        mSubredditViewModel = ViewModelProviders.of(this, factory).get(SubredditViewModel.class);
+        mSubredditViewModel.getSubredditData().observe(this, new Observer<SubredditData>() {
             @Override
-            public void onClick(View view) {
+            public void onChanged(@Nullable SubredditData subredditData) {
-                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
+                if(subredditData != null) {
-                        .setAction("Action", null).show();
+                    if(!subredditData.getBannerUrl().equals("") && !subredditData.getBannerUrl().equals("null")) {
+                        glide.load(subredditData.getBannerUrl()).into(bannerImageView);
+                    }
+
+                    if(subredditData.getIconUrl().equals("") || subredditData.getIconUrl().equals("null")) {
+                        glide.load(getDrawable(R.drawable.subreddit_default_icon)).into(iconCircleImageView);
+                    } else {
+                        glide.load(subredditData.getIconUrl()).into(iconCircleImageView);
+                    }
+
+                    subredditNameTextView.setText(subredditData.getName());
+                    String nSubscribers = getString(R.string.subscribers_number_detail, subredditData.getNSubscribers());
+                    nSubscribersTextView.setText(nSubscribers);
+                    descriptionTextView.setText(subredditData.getDescription());
+                }
+            }
+        });
+
+        new FetchSubredditData(Volley.newRequestQueue(this), subredditName).querySubredditData(new FetchSubredditData.FetchSubredditDataListener() {
+            @Override
+            public void onFetchSubredditDataSuccess(String response) {
+                new ParseSubredditData().parseComment(response, new ParseSubredditData.ParseSubredditDataListener() {
+                    @Override
+                    public void onParseSubredditDataSuccess(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 onParseSubredditDataFail() {
+                        Toast.makeText(ViewSubredditDetailActivity.this, "Cannot fetch subreddit info", Toast.LENGTH_SHORT).show();
+                    }
+                });
+            }
+
+            @Override
+            public void onFetchSubredditDataFail() {
+
             }
         });
     }
+
+    private static class InsertSubredditDataAsyncTask extends AsyncTask<Void, Void, Void> {
+
+        private final SubredditDao mSubredditDao;
+        private SubredditData subredditData;
+
+        InsertSubredditDataAsyncTask(SubredditRoomDatabase subredditDb, SubredditData subredditData) {
+            mSubredditDao = subredditDb.subredditDao();
+            this.subredditData = subredditData;
+        }
+
+        @Override
+        protected Void doInBackground(final Void... params) {
+            mSubredditDao.insert(subredditData);
+            return null;
+        }
+    }
 }

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

@@ -29,13 +29,12 @@
 
                 <ImageView
                     android:id="@+id/banner_image_view_view_subreddit_detail_activity"
-                    android:src="@drawable/subreddit_default_icon"
                     android:layout_width="match_parent"
                     android:scaleType="centerCrop"
                     android:layout_height="180dp" />
 
                 <de.hdodenhof.circleimageview.CircleImageView
-                    android:src="@drawable/subreddit_default_icon"
+                    android:id="@+id/icon_circle_image_view_view_subreddit_detail_activity"
                     android:layout_width="72dp"
                     android:layout_height="72dp"
                     android:layout_marginTop="-36dp"
@@ -53,22 +52,46 @@
                     android:background="@android:color/white">
 
                     <TextView
-                        android:id="@+id/name_text_view_view_subreddit_detail_activity"
+                        android:id="@+id/subreddit_name_text_view_view_subreddit_detail_activity"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         android:layout_marginTop="36dp"
                         android:layout_marginStart="16dp"
                         android:layout_marginEnd="16dp"
-                        android:textColor="@android:color/black"
+                        android:textSize="18sp"
-                        android:text="Dummy"/>
+                        android:textColor="@color/colorAccent"/>
+
+                    <RelativeLayout
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content">
+
+                        <TextView
+                            android:id="@+id/subscriber_count_text_view_view_subreddit_detail_activity"
+                            android:layout_width="wrap_content"
+                            android:layout_height="wrap_content"
+                            android:layout_marginTop="16dp"
+                            android:layout_marginStart="16dp"
+                            android:layout_marginEnd="16dp"
+                            android:textColor="@android:color/black" />
+
+                        <TextView
+                            android:id="@+id/online_subscriber_count_text_view_view_subreddit_detail_activity"
+                            android:layout_width="wrap_content"
+                            android:layout_height="wrap_content"
+                            android:layout_marginTop="16dp"
+                            android:layout_marginStart="16dp"
+                            android:layout_marginEnd="16dp"
+                            android:layout_alignParentEnd="true"
+                            android:textColor="@android:color/black" />
+
+                    </RelativeLayout>
 
                     <TextView
-                        android:id="@+id/subscriber_count_text_view_view_subreddit_detail_activity"
+                        android:id="@+id/description_text_view_view_subreddit_detail_activity"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         android:layout_margin="16dp"
-                        android:textColor="@android:color/black"
+                        android:textColor="@android:color/black" />
-                        android:text="Subscriber: 10000"/>
 
                 </LinearLayout>
 
@@ -86,13 +109,4 @@
 
     <include layout="@layout/content_view_subreddit_detail" />
 
-    <android.support.design.widget.FloatingActionButton
-        android:id="@+id/fab"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_margin="@dimen/fab_margin"
-        app:layout_anchor="@id/app_bar_layout_view_subreddit_detail_activity"
-        app:layout_anchorGravity="bottom|end"
-        app:srcCompat="@drawable/baseline_add_white_24" />
-
 </android.support.design.widget.CoordinatorLayout>

app/src/main/res/values/strings.xml

@@ -20,6 +20,8 @@
     <string name="following">Following</string>
     <string name="subscriptions">Subscriptions</string>
     <string name="title_activity_view_subreddit_detail">ViewSubredditDetailActivity</string>
+    <string name="subscribers_number_detail">Subscribers: %1$d</string>
+    <string name="online_subscribers_number_detail">Online: %1$d</string>
     <string name="large_text">
         "Material is the metaphor.\n\n"