Add a feature: Search for users. Change some names of interfaces and methods.

20 files changed, 892 insertions, 97 deletions

diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/CheckIsFollowingUserAsyncTask.java b/app/src/main/java/ml/docilealligator/infinityforreddit/CheckIsFollowingUserAsyncTask.java
new file mode 100644
index 00000000..4d75d155
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/CheckIsFollowingUserAsyncTask.java
@@ -0,0 +1,41 @@
+package ml.docilealligator.infinityforreddit;
+
+import android.os.AsyncTask;
+
+import SubscribedUserDatabase.SubscribedUserDao;
+import SubscribedUserDatabase.SubscribedUserData;
+
+public class CheckIsFollowingUserAsyncTask extends AsyncTask<Void, Void, Void> {
+    private SubscribedUserDao subscribedUserDao;
+    private String userName;
+    private SubscribedUserData subscribedUserData;
+    private CheckIsFollowingUserListener checkIsFollowingUserListener;
+
+    interface CheckIsFollowingUserListener {
+        void isSubscribed();
+        void isNotSubscribed();
+    }
+
+    CheckIsFollowingUserAsyncTask(SubscribedUserDao subscribedUserDao, String userName,
+                                  CheckIsFollowingUserListener checkIsFollowingUserListener) {
+        this.subscribedUserDao = subscribedUserDao;
+        this.userName = userName;
+        this.checkIsFollowingUserListener = checkIsFollowingUserListener;
+    }
+
+    @Override
+    protected Void doInBackground(Void... voids) {
+        subscribedUserData = subscribedUserDao.getSubscribedUser(userName);
+        return null;
+    }
+
+    @Override
+    protected void onPostExecute(Void aVoid) {
+        super.onPostExecute(aVoid);
+        if(subscribedUserData != null) {
+            checkIsFollowingUserListener.isSubscribed();
+        } else {
+            checkIsFollowingUserListener.isNotSubscribed();
+        }
+    }
+}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/FetchUserData.java b/app/src/main/java/ml/docilealligator/infinityforreddit/FetchUserData.java
index 7415be7e..7f2e2528 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/FetchUserData.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/FetchUserData.java
@@ -1,9 +1,11 @@
 package ml.docilealligator.infinityforreddit;
 
-import androidx.annotation.NonNull;
 import android.util.Log;
 
+import java.util.ArrayList;
+
 import User.UserData;
+import androidx.annotation.NonNull;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Retrofit;
@@ -11,7 +13,12 @@ import retrofit2.Retrofit;
 public class FetchUserData {
     public interface FetchUserDataListener {
         void onFetchUserDataSuccess(UserData userData);
-        void onFetchUserDataFail();
+        void onFetchUserDataFailed();
+    }
+
+    public interface FetchUserListingDataListener {
+        void onFetchUserListingDataSuccess(ArrayList<UserData> userData, String after);
+        void onFetchUserListingDataFailed();
     }
 
     public static void fetchUserData(final Retrofit retrofit, String userName,
@@ -30,20 +37,54 @@ public class FetchUserData {
                         }
 
                         @Override
-                        public void onParseUserDataFail() {
-                            fetchUserDataListener.onFetchUserDataFail();
+                        public void onParseUserDataFailed() {
+                            fetchUserDataListener.onFetchUserDataFailed();
+                        }
+                    });
+                } else {
+                    Log.i("call failed", response.message());
+                    fetchUserDataListener.onFetchUserDataFailed();
+                }
+            }
+
+            @Override
+            public void onFailure(@NonNull Call<String> call, @NonNull Throwable t) {
+                Log.i("call failed", t.getMessage());
+                fetchUserDataListener.onFetchUserDataFailed();
+            }
+        });
+    }
+
+    public static void fetchUserListingData(Retrofit retrofit, String query, String after,
+                                            FetchUserListingDataListener fetchUserListingDataListener) {
+        RedditAPI api = retrofit.create(RedditAPI.class);
+
+        Call<String> userInfo = api.searchUsers(query, after);
+        userInfo.enqueue(new Callback<String>() {
+            @Override
+            public void onResponse(@NonNull Call<String> call, @NonNull retrofit2.Response<String> response) {
+                if(response.isSuccessful()) {
+                    ParseUserData.parseUserListingData(response.body(), new ParseUserData.ParseUserListingDataListener() {
+                        @Override
+                        public void onParseUserListingDataSuccess(ArrayList<UserData> userData, String after) {
+                            fetchUserListingDataListener.onFetchUserListingDataSuccess(userData, after);
+                        }
+
+                        @Override
+                        public void onParseUserListingDataFailed() {
+                            fetchUserListingDataListener.onFetchUserListingDataFailed();
                         }
                     });
                 } else {
                     Log.i("call failed", response.message());
-                    fetchUserDataListener.onFetchUserDataFail();
+                    fetchUserListingDataListener.onFetchUserListingDataFailed();
                 }
             }
 
             @Override
             public void onFailure(@NonNull Call<String> call, @NonNull Throwable t) {
                 Log.i("call failed", t.getMessage());
-                fetchUserDataListener.onFetchUserDataFail();
+                fetchUserListingDataListener.onFetchUserListingDataFailed();
             }
         });
     }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/LoadUserDataAsyncTask.java b/app/src/main/java/ml/docilealligator/infinityforreddit/LoadUserDataAsyncTask.java
index 704c3e08..8cb576d2 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/LoadUserDataAsyncTask.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/LoadUserDataAsyncTask.java
@@ -49,7 +49,7 @@ public class LoadUserDataAsyncTask extends AsyncTask<Void, Void, Void> {
                 }
 
                 @Override
-                public void onFetchUserDataFail() {
+                public void onFetchUserDataFailed() {
                     loadUserDataAsyncTaskListener.loadUserDataSuccess("");
                 }
             });
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/NetworkComponent.java b/app/src/main/java/ml/docilealligator/infinityforreddit/NetworkComponent.java
index 05aae8af..b250ac29 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/NetworkComponent.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/NetworkComponent.java
@@ -10,6 +10,7 @@ interface NetworkComponent {
     void inject(MainActivity mainActivity);
     void inject(PostFragment postFragment);
     void inject(SubredditListingFragment subredditListingFragment);
+    void inject(UserListingFragment userListingFragment);
     void inject(ViewPostDetailActivity viewPostDetailActivity);
     void inject(ViewSubredditDetailActivity viewSubredditDetailActivity);
     void inject(ViewUserDetailActivity viewUserDetailActivity);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/ParseUserData.java b/app/src/main/java/ml/docilealligator/infinityforreddit/ParseUserData.java
index 10d118cf..618a9a81 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/ParseUserData.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/ParseUserData.java
@@ -3,21 +3,33 @@ package ml.docilealligator.infinityforreddit;
 import android.os.AsyncTask;
 import android.util.Log;
 
+import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 
+import java.util.ArrayList;
+
 import User.UserData;
 
 public class ParseUserData {
     interface ParseUserDataListener {
         void onParseUserDataSuccess(UserData userData);
-        void onParseUserDataFail();
+        void onParseUserDataFailed();
+    }
+
+    interface ParseUserListingDataListener {
+        void onParseUserListingDataSuccess(ArrayList<UserData> userData, String after);
+        void onParseUserListingDataFailed();
     }
 
     static void parseUserData(String response, ParseUserDataListener parseUserDataListener) {
         new ParseUserDataAsyncTask(response, parseUserDataListener).execute();
     }
 
+    static void parseUserListingData(String response, ParseUserListingDataListener parseUserListingDataListener) {
+        new ParseUserListingDataAsyncTask(response, parseUserListingDataListener).execute();
+    }
+
     private static class ParseUserDataAsyncTask extends AsyncTask<Void, Void, Void> {
         private JSONObject jsonResponse;
         private ParseUserDataListener parseUserDataListener;
@@ -32,14 +44,15 @@ public class ParseUserData {
                 parseFailed = false;
             } catch (JSONException e) {
                 Log.i("userdata json error", e.getMessage());
-                parseUserDataListener.onParseUserDataFail();
+                parseUserDataListener.onParseUserDataFailed();
             }
         }
 
         @Override
         protected Void doInBackground(Void... voids) {
             try {
-                jsonResponse = jsonResponse.getJSONObject(JSONUtils.DATA_KEY);
+                userData = parseUserDataBase(jsonResponse);
+                /*jsonResponse = jsonResponse.getJSONObject(JSONUtils.DATA_KEY);
                 String userName = jsonResponse.getString(JSONUtils.NAME_KEY);
                 String iconImageUrl = jsonResponse.getString(JSONUtils.ICON_IMG_KEY);
                 String bannerImageUrl = "";
@@ -56,7 +69,7 @@ public class ParseUserData {
                 boolean isGold = jsonResponse.getBoolean(JSONUtils.IS_GOLD_KEY);
                 boolean isFriend = jsonResponse.getBoolean(JSONUtils.IS_FRIEND_KEY);
 
-                userData = new UserData(userName, iconImageUrl, bannerImageUrl, karma, isGold, isFriend, canBeFollowed);
+                userData = new UserData(userName, iconImageUrl, bannerImageUrl, karma, isGold, isFriend, canBeFollowed);*/
             } catch (JSONException e) {
                 parseFailed = true;
                 Log.i("parse user data error", e.getMessage());
@@ -69,8 +82,74 @@ public class ParseUserData {
             if(!parseFailed) {
                 parseUserDataListener.onParseUserDataSuccess(userData);
             } else {
-                parseUserDataListener.onParseUserDataFail();
+                parseUserDataListener.onParseUserDataFailed();
+            }
+        }
+    }
+
+    private static class ParseUserListingDataAsyncTask extends AsyncTask<Void, Void, Void> {
+        private JSONObject jsonResponse;
+        private ParseUserListingDataListener parseUserListingDataListener;
+        private String after;
+        private boolean parseFailed;
+
+        private ArrayList<UserData> userDataArrayList;
+
+        ParseUserListingDataAsyncTask(String response, ParseUserListingDataListener parseUserListingDataListener){
+            try {
+                jsonResponse = new JSONObject(response);
+                this.parseUserListingDataListener = parseUserListingDataListener;
+                parseFailed = false;
+                userDataArrayList = new ArrayList<>();
+            } catch (JSONException e) {
+                Log.i("userdata json error", e.getMessage());
+                this.parseUserListingDataListener.onParseUserListingDataFailed();
+            }
+        }
+
+        @Override
+        protected Void doInBackground(Void... voids) {
+            try {
+                after = jsonResponse.getJSONObject(JSONUtils.DATA_KEY).getString(JSONUtils.AFTER_KEY);
+                JSONArray children = jsonResponse.getJSONObject(JSONUtils.DATA_KEY).getJSONArray(JSONUtils.CHILDREN_KEY);
+                for(int i = 0; i < children.length(); i++) {
+                    userDataArrayList.add(parseUserDataBase(children.getJSONObject(i)));
+                }
+            } catch (JSONException e) {
+                parseFailed = true;
+                Log.i("parse user data error", e.getMessage());
+            }
+            return null;
+        }
+
+        @Override
+        protected void onPostExecute(Void aVoid) {
+            if(!parseFailed) {
+                parseUserListingDataListener.onParseUserListingDataSuccess(userDataArrayList, after);
+            } else {
+                parseUserListingDataListener.onParseUserListingDataFailed();
             }
         }
     }
+
+    private static UserData parseUserDataBase(JSONObject userDataJson) throws JSONException {
+        userDataJson = userDataJson.getJSONObject(JSONUtils.DATA_KEY);
+        String userName = userDataJson.getString(JSONUtils.NAME_KEY);
+        String iconImageUrl = userDataJson.getString(JSONUtils.ICON_IMG_KEY);
+        String bannerImageUrl = "";
+        boolean canBeFollowed;
+        if(userDataJson.has(JSONUtils.SUBREDDIT_KEY) && !userDataJson.isNull(JSONUtils.SUBREDDIT_KEY)) {
+            bannerImageUrl = userDataJson.getJSONObject(JSONUtils.SUBREDDIT_KEY).getString(JSONUtils.BANNER_IMG_KEY);
+            canBeFollowed = true;
+        } else {
+            canBeFollowed = false;
+        }
+        int linkKarma = userDataJson.getInt(JSONUtils.LINK_KARMA_KEY);
+        int commentKarma = userDataJson.getInt(JSONUtils.COMMENT_KARMA_KEY);
+        int karma = linkKarma + commentKarma;
+        boolean isGold = userDataJson.getBoolean(JSONUtils.IS_GOLD_KEY);
+        boolean isFriend = userDataJson.getBoolean(JSONUtils.IS_FRIEND_KEY);
+
+        return new UserData(userName, iconImageUrl, bannerImageUrl, karma, isGold, isFriend, canBeFollowed);
+    }
 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/RedditAPI.java b/app/src/main/java/ml/docilealligator/infinityforreddit/RedditAPI.java
index e467eb0a..a0118ded 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/RedditAPI.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/RedditAPI.java
@@ -60,9 +60,8 @@ public interface RedditAPI {
     @GET("subreddits/search.json?raw_json=1&include_over_18=on")
     Call<String> searchSubreddits(@Query("q") String subredditName, @Query("after") String after);
 
-    @GET("profiles/search.json?raw_json=1")
-    Call<String> searchProfiles(@Query("q") String profileName, @Query("after") String after,
-                                @HeaderMap Map<String, String> headers);
+    @GET("search.json?raw_json=1&type=user")
+    Call<String> searchUsers(@Query("q") String profileName, @Query("after") String after);
 
     @GET("search.json?raw_json=1&type=link")
     Call<String> searchPosts(@Query("q") String query, @Query("after") String after,
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/SearchActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/SearchActivity.java
index dd72822e..25a78b9d 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/SearchActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/SearchActivity.java
@@ -78,10 +78,9 @@ public class SearchActivity extends AppCompatActivity {
                 }
                 default:
                 {
-                    PostFragment mFragment = new PostFragment();
+                    UserListingFragment mFragment = new UserListingFragment();
                     Bundle bundle = new Bundle();
-                    bundle.putInt(PostFragment.POST_TYPE_KEY, PostDataSource.TYPE_FRONT_PAGE);
-                    bundle.putString(PostFragment.NAME_KEY, mQuery);
+                    bundle.putString(UserListingFragment.QUERY_KEY, mQuery);
                     mFragment.setArguments(bundle);
                     return mFragment;
                 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/SubredditListingRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/SubredditListingRecyclerViewAdapter.java
index 56735c5e..e598d786 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/SubredditListingRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/SubredditListingRecyclerViewAdapter.java
@@ -228,6 +228,4 @@ public class SubredditListingRecyclerViewAdapter extends PagedListAdapter<Subred
             ((DataViewHolder) holder).subscribeButton.setVisibility(View.GONE);
         }
     }
-
-
 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/SubredditSubscription.java b/app/src/main/java/ml/docilealligator/infinityforreddit/SubredditSubscription.java
index 9ede0db5..ea72db55 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/SubredditSubscription.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/SubredditSubscription.java
@@ -58,18 +58,6 @@ class SubredditSubscription {
                             public void onFetchSubredditDataSuccess(SubredditData subredditData, int nCurrentOnlineSubscribers) {
                                 new UpdateSubscriptionAsyncTask(subscribedSubredditDao,
                                         subredditData, true).execute();
-                                /*ParseSubredditData.parseSubredditData(response, new ParseSubredditData.ParseSubredditDataListener() {
-                                    @Override
-                                    public void onParseSubredditDataSuccess(SubredditData subredditData, int nCurrentOnlineSubscribers) {
-                                        new UpdateSubscriptionAsyncTask(subscribedSubredditDao,
-                                                subredditData, true).execute();
-                                    }
-
-                                    @Override
-                                    public void onParseSubredditDataFail() {
-
-                                    }
-                                });*/
                             }
 
                             @Override
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/UserFollowing.java b/app/src/main/java/ml/docilealligator/infinityforreddit/UserFollowing.java
index ec069664..4003c2d4 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/UserFollowing.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/UserFollowing.java
@@ -61,7 +61,7 @@ class UserFollowing {
                             }
 
                             @Override
-                            public void onFetchUserDataFail() {
+                            public void onFetchUserDataFailed() {
 
                             }
                         });
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingDataSource.java b/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingDataSource.java
new file mode 100644
index 00000000..9273c32b
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingDataSource.java
@@ -0,0 +1,107 @@
+package ml.docilealligator.infinityforreddit;
+
+import java.util.ArrayList;
+
+import User.UserData;
+import androidx.annotation.NonNull;
+import androidx.lifecycle.MutableLiveData;
+import androidx.paging.PageKeyedDataSource;
+import retrofit2.Retrofit;
+
+public class UserListingDataSource extends PageKeyedDataSource<String, UserData> {
+    interface OnUserListingDataFetchedCallback {
+        void hasUser();
+        void noUser();
+    }
+    private Retrofit retrofit;
+    private String query;
+    private UserListingDataSource.OnUserListingDataFetchedCallback onUserListingDataFetchedCallback;
+
+    private MutableLiveData<NetworkState> paginationNetworkStateLiveData;
+    private MutableLiveData<NetworkState> initialLoadStateLiveData;
+
+    private PageKeyedDataSource.LoadInitialParams<String> initialParams;
+    private PageKeyedDataSource.LoadInitialCallback<String, UserData> initialCallback;
+    private PageKeyedDataSource.LoadParams<String> params;
+    private PageKeyedDataSource.LoadCallback<String, UserData> callback;
+
+    UserListingDataSource(Retrofit retrofit, String query,
+                               UserListingDataSource.OnUserListingDataFetchedCallback onUserListingDataFetchedCallback) {
+        this.retrofit = retrofit;
+        this.query = query;
+        this.onUserListingDataFetchedCallback = onUserListingDataFetchedCallback;
+        paginationNetworkStateLiveData = new MutableLiveData();
+        initialLoadStateLiveData = new MutableLiveData();
+    }
+
+    MutableLiveData getPaginationNetworkStateLiveData() {
+        return paginationNetworkStateLiveData;
+    }
+
+    MutableLiveData getInitialLoadStateLiveData() {
+        return initialLoadStateLiveData;
+    }
+
+    @Override
+    public void loadInitial(@NonNull PageKeyedDataSource.LoadInitialParams<String> params, @NonNull PageKeyedDataSource.LoadInitialCallback<String, UserData> callback) {
+        initialParams = params;
+        initialCallback = callback;
+
+        initialLoadStateLiveData.postValue(NetworkState.LOADING);
+
+        FetchUserData.fetchUserListingData(retrofit, query, null, new FetchUserData.FetchUserListingDataListener() {
+            @Override
+            public void onFetchUserListingDataSuccess(ArrayList<UserData> UserData, String after) {
+                if(UserData.size() == 0) {
+                    onUserListingDataFetchedCallback.noUser();
+                } else {
+                    onUserListingDataFetchedCallback.hasUser();
+                }
+
+                callback.onResult(UserData, null, after);
+                initialLoadStateLiveData.postValue(NetworkState.LOADED);
+            }
+
+            @Override
+            public void onFetchUserListingDataFailed() {
+                initialLoadStateLiveData.postValue(new NetworkState(NetworkState.Status.FAILED, "Error retrieving User list"));
+            }
+        });
+    }
+
+    @Override
+    public void loadBefore(@NonNull PageKeyedDataSource.LoadParams<String> params, @NonNull PageKeyedDataSource.LoadCallback<String, UserData> callback) {
+
+    }
+
+    @Override
+    public void loadAfter(@NonNull PageKeyedDataSource.LoadParams<String> params, @NonNull PageKeyedDataSource.LoadCallback<String, UserData> callback) {
+        this.params = params;
+        this.callback = callback;
+
+        if(params.key.equals("null")) {
+            return;
+        }
+
+        FetchUserData.fetchUserListingData(retrofit, query, params.key, new FetchUserData.FetchUserListingDataListener() {
+            @Override
+            public void onFetchUserListingDataSuccess(ArrayList<UserData> UserData, String after) {
+                callback.onResult(UserData, after);
+                paginationNetworkStateLiveData.postValue(NetworkState.LOADED);
+            }
+
+            @Override
+            public void onFetchUserListingDataFailed() {
+                paginationNetworkStateLiveData.postValue(new NetworkState(NetworkState.Status.FAILED, "Error retrieving User list"));
+            }
+        });
+    }
+
+    void retry() {
+        loadInitial(initialParams, initialCallback);
+    }
+
+    void retryLoadingMore() {
+        loadAfter(params, callback);
+    }
+}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingDataSourceFactory.java b/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingDataSourceFactory.java
new file mode 100644
index 00000000..6498412c
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingDataSourceFactory.java
@@ -0,0 +1,40 @@
+package ml.docilealligator.infinityforreddit;
+
+import androidx.annotation.NonNull;
+import androidx.lifecycle.MutableLiveData;
+import androidx.paging.DataSource;
+import retrofit2.Retrofit;
+
+public class UserListingDataSourceFactory extends DataSource.Factory {
+    private Retrofit retrofit;
+    private String query;
+    private UserListingDataSource.OnUserListingDataFetchedCallback onUserListingDataFetchedCallback;
+
+    private UserListingDataSource UserListingDataSource;
+    private MutableLiveData<UserListingDataSource> UserListingDataSourceMutableLiveData;
+
+    UserListingDataSourceFactory(Retrofit retrofit, String query,
+                                      UserListingDataSource.OnUserListingDataFetchedCallback onUserListingDataFetchedCallback) {
+        this.retrofit = retrofit;
+        this.query = query;
+        this.onUserListingDataFetchedCallback = onUserListingDataFetchedCallback;
+        UserListingDataSourceMutableLiveData = new MutableLiveData<>();
+    }
+
+    @NonNull
+    @Override
+    public DataSource create() {
+        UserListingDataSource UserListingDataSource = new UserListingDataSource(retrofit,
+                query, onUserListingDataFetchedCallback);
+        UserListingDataSourceMutableLiveData.postValue(UserListingDataSource);
+        return UserListingDataSource;
+    }
+
+    public MutableLiveData<UserListingDataSource> getUserListingDataSourceMutableLiveData() {
+        return UserListingDataSourceMutableLiveData;
+    }
+
+    UserListingDataSource getUserListingDataSource() {
+        return UserListingDataSource;
+    }
+}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingFragment.java
new file mode 100644
index 00000000..abc9dcdb
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingFragment.java
@@ -0,0 +1,147 @@
+package ml.docilealligator.infinityforreddit;
+
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import com.bumptech.glide.Glide;
+import com.lsjwzh.widget.materialloadingprogressbar.CircleProgressBar;
+
+import javax.inject.Inject;
+import javax.inject.Named;
+
+import SubscribedUserDatabase.SubscribedUserRoomDatabase;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.ViewModelProviders;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import retrofit2.Retrofit;
+
+
+/**
+ * A simple {@link Fragment} subclass.
+ */
+public class UserListingFragment extends Fragment {
+    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;
+
+    private LinearLayoutManager mLinearLayoutManager;
+
+    private String mQuery;
+
+    private UserListingRecyclerViewAdapter mAdapter;
+
+    UserListingViewModel mUserListingViewModel;
+
+    @Inject
+    @Named("auth_info")
+    SharedPreferences mAuthInfoSharedPreferences;
+
+    @Inject @Named("no_oauth")
+    Retrofit mRetrofit;
+
+    @Inject @Named("oauth")
+    Retrofit mOauthRetrofit;
+
+    public UserListingFragment() {
+        // Required empty public constructor
+    }
+
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        // Inflate the layout for this fragment
+        View rootView = inflater.inflate(R.layout.fragment_user_listing, container, false);
+
+        ((Infinity) getActivity().getApplication()).getmNetworkComponent().inject(this);
+
+        ButterKnife.bind(this, rootView);
+
+        mLinearLayoutManager = new LinearLayoutManager(getActivity());
+        mUserListingRecyclerView.setLayoutManager(mLinearLayoutManager);
+
+        mQuery = getArguments().getString(QUERY_KEY);
+
+        String accessToken = getActivity().getSharedPreferences(SharedPreferencesUtils.AUTH_CODE_FILE_KEY, Context.MODE_PRIVATE)
+                .getString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, "");
+
+        UserListingViewModel.Factory factory = new UserListingViewModel.Factory(mRetrofit, mQuery,
+                new UserListingDataSource.OnUserListingDataFetchedCallback() {
+                    @Override
+                    public void hasUser() {
+                        mFetchUserListingInfoLinearLayout.setVisibility(View.GONE);
+                    }
+
+                    @Override
+                    public void noUser() {
+                        mFetchUserListingInfoLinearLayout.setOnClickListener(new View.OnClickListener() {
+                            @Override
+                            public void onClick(View view) {
+                                //Do nothing
+                            }
+                        });
+                        showErrorView(R.string.no_users);
+                    }
+                });
+
+        mAdapter = new UserListingRecyclerViewAdapter(getActivity(), mOauthRetrofit, mRetrofit,
+                mAuthInfoSharedPreferences,
+                SubscribedUserRoomDatabase.getDatabase(getContext()).subscribedUserDao(),
+                () -> mUserListingViewModel.retryLoadingMore());
+
+        mUserListingRecyclerView.setAdapter(mAdapter);
+
+        mUserListingViewModel = ViewModelProviders.of(this, factory).get(UserListingViewModel.class);
+        mUserListingViewModel.getUsers().observe(this, UserData -> mAdapter.submitList(UserData));
+
+        mUserListingViewModel.getInitialLoadingState().observe(this, networkState -> {
+            if(networkState.getStatus().equals(NetworkState.Status.SUCCESS)) {
+                mProgressBar.setVisibility(View.GONE);
+            } else if(networkState.getStatus().equals(NetworkState.Status.FAILED)) {
+                mFetchUserListingInfoLinearLayout.setOnClickListener(view -> mUserListingViewModel.retry());
+                showErrorView(R.string.load_posts_error);
+            } else {
+                mFetchUserListingInfoLinearLayout.setVisibility(View.GONE);
+                mProgressBar.setVisibility(View.VISIBLE);
+            }
+        });
+
+        mUserListingViewModel.getPaginationNetworkState().observe(this, networkState -> {
+            mAdapter.setNetworkState(networkState);
+        });
+
+        return rootView;
+    }
+
+    private void showErrorView(int stringResId) {
+        mProgressBar.setVisibility(View.GONE);
+        if(getActivity() != null && isAdded()) {
+            mFetchUserListingInfoLinearLayout.setVisibility(View.VISIBLE);
+            mFetchUserListingInfoTextView.setText(stringResId);
+            Glide.with(this).load(R.drawable.load_post_error_indicator).into(mFetchUserListingInfoImageView);
+        }
+    }
+}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingRecyclerViewAdapter.java
new file mode 100644
index 00000000..e48bfba5
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingRecyclerViewAdapter.java
@@ -0,0 +1,231 @@
+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;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.ProgressBar;
+import android.widget.RelativeLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.bumptech.glide.Glide;
+import com.bumptech.glide.RequestManager;
+import com.bumptech.glide.request.RequestOptions;
+
+import SubscribedUserDatabase.SubscribedUserDao;
+import User.UserData;
+import androidx.annotation.NonNull;
+import androidx.constraintlayout.widget.ConstraintLayout;
+import androidx.paging.PagedListAdapter;
+import androidx.recyclerview.widget.DiffUtil;
+import androidx.recyclerview.widget.RecyclerView;
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import jp.wasabeef.glide.transformations.RoundedCornersTransformation;
+import pl.droidsonroids.gif.GifImageView;
+import retrofit2.Retrofit;
+
+public class UserListingRecyclerViewAdapter extends PagedListAdapter<UserData, RecyclerView.ViewHolder> {
+    interface RetryLoadingMoreCallback {
+        void retryLoadingMore();
+    }
+
+    private RequestManager glide;
+
+    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 Context context;
+    private Retrofit oauthRetrofit;
+    private Retrofit retrofit;
+    private SharedPreferences authInfoSharedPreferences;
+    private SubscribedUserDao subscribedUserDao;
+
+    private NetworkState networkState;
+    private UserListingRecyclerViewAdapter.RetryLoadingMoreCallback retryLoadingMoreCallback;
+
+    UserListingRecyclerViewAdapter(Context context, Retrofit oauthRetrofit, Retrofit retrofit,
+                                        SharedPreferences authInfoSharedPreferences,
+                                        SubscribedUserDao subscribedUserDao,
+                                        UserListingRecyclerViewAdapter.RetryLoadingMoreCallback retryLoadingMoreCallback) {
+        super(DIFF_CALLBACK);
+        this.context = context;
+        this.oauthRetrofit = oauthRetrofit;
+        this.retrofit = retrofit;
+        this.authInfoSharedPreferences = authInfoSharedPreferences;
+        this.subscribedUserDao = subscribedUserDao;
+        this.retryLoadingMoreCallback = retryLoadingMoreCallback;
+        glide = Glide.with(context.getApplicationContext());
+    }
+
+    static final DiffUtil.ItemCallback<UserData> DIFF_CALLBACK = new DiffUtil.ItemCallback<UserData>() {
+        @Override
+        public boolean areItemsTheSame(@NonNull UserData oldItem, @NonNull UserData newItem) {
+            return oldItem.getName().equals(newItem.getName());
+        }
+
+        @Override
+        public boolean areContentsTheSame(@NonNull UserData oldItem, @NonNull UserData newItem) {
+            return true;
+        }
+    };
+
+    @NonNull
+    @Override
+    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        if(viewType == VIEW_TYPE_DATA) {
+            ConstraintLayout constraintLayout = (ConstraintLayout) LayoutInflater.from(parent.getContext()).inflate(R.layout.item_user_listing, parent, false);
+            return new UserListingRecyclerViewAdapter.DataViewHolder(constraintLayout);
+        } else if(viewType == VIEW_TYPE_ERROR) {
+            RelativeLayout relativeLayout = (RelativeLayout) LayoutInflater.from(parent.getContext()).inflate(R.layout.item_footer_error, parent, false);
+            return new UserListingRecyclerViewAdapter.ErrorViewHolder(relativeLayout);
+        } else {
+            RelativeLayout relativeLayout = (RelativeLayout) LayoutInflater.from(parent.getContext()).inflate(R.layout.item_footer_loading, parent, false);
+            return new UserListingRecyclerViewAdapter.LoadingViewHolder(relativeLayout);
+        }
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
+        if(holder instanceof UserListingRecyclerViewAdapter.DataViewHolder) {
+            UserData UserData = getItem(position);
+            ((UserListingRecyclerViewAdapter.DataViewHolder) holder).constraintLayout.setOnClickListener(view -> {
+                Intent intent = new Intent(context, ViewUserDetailActivity.class);
+                intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY, UserData.getName());
+                context.startActivity(intent);
+            });
+
+            if(UserData.getIconUrl() != null) {
+                glide.load(UserData.getIconUrl())
+                        .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
+                        .error(glide.load(R.drawable.subreddit_default_icon))
+                        .into(((UserListingRecyclerViewAdapter.DataViewHolder) holder).iconGifImageView);
+            } else {
+                glide.load(R.drawable.subreddit_default_icon)
+                        .apply(RequestOptions.bitmapTransform(new RoundedCornersTransformation(72, 0)))
+                        .into(((UserListingRecyclerViewAdapter.DataViewHolder) holder).iconGifImageView);
+            }
+
+            ((UserListingRecyclerViewAdapter.DataViewHolder) holder).UserNameTextView.setText(UserData.getName());
+
+            new CheckIsFollowingUserAsyncTask(subscribedUserDao, UserData.getName(),
+                    new CheckIsFollowingUserAsyncTask.CheckIsFollowingUserListener() {
+                        @Override
+                        public void isSubscribed() {
+                            ((UserListingRecyclerViewAdapter.DataViewHolder) holder).subscribeButton.setVisibility(View.GONE);
+                        }
+
+                        @Override
+                        public void isNotSubscribed() {
+                            ((UserListingRecyclerViewAdapter.DataViewHolder) holder).subscribeButton.setVisibility(View.VISIBLE);
+                            ((UserListingRecyclerViewAdapter.DataViewHolder) holder).subscribeButton.setOnClickListener(view -> {
+                                UserFollowing.followUser(oauthRetrofit, retrofit,
+                                        authInfoSharedPreferences, UserData.getName(), subscribedUserDao,
+                                        new UserFollowing.UserFollowingListener() {
+                                            @Override
+                                            public void onUserFollowingSuccess() {
+                                                ((UserListingRecyclerViewAdapter.DataViewHolder) holder).subscribeButton.setVisibility(View.GONE);
+                                                Toast.makeText(context, R.string.followed, Toast.LENGTH_SHORT).show();
+                                            }
+
+                                            @Override
+                                            public void onUserFollowingFail() {
+                                                Toast.makeText(context, R.string.follow_failed, Toast.LENGTH_SHORT).show();
+                                            }
+                                        });
+                            });
+                        }
+                    }).execute();
+        }
+    }
+
+    @Override
+    public int getItemViewType(int position) {
+        // Reached at the end
+        if (hasExtraRow() && position == getItemCount() - 1) {
+            if (networkState.getStatus() == NetworkState.Status.LOADING) {
+                return VIEW_TYPE_LOADING;
+            } else {
+                return VIEW_TYPE_ERROR;
+            }
+        } else {
+            return VIEW_TYPE_DATA;
+        }
+    }
+
+    @Override
+    public int getItemCount() {
+        if(hasExtraRow()) {
+            return super.getItemCount() + 1;
+        }
+        return super.getItemCount();
+    }
+
+    private boolean hasExtraRow() {
+        return networkState != null && networkState.getStatus() != NetworkState.Status.SUCCESS;
+    }
+
+    void setNetworkState(NetworkState newNetworkState) {
+        NetworkState previousState = this.networkState;
+        boolean previousExtraRow = hasExtraRow();
+        this.networkState = newNetworkState;
+        boolean newExtraRow = hasExtraRow();
+        if (previousExtraRow != newExtraRow) {
+            if (previousExtraRow) {
+                notifyItemRemoved(super.getItemCount());
+            } else {
+                notifyItemInserted(super.getItemCount());
+            }
+        } else if (newExtraRow && !previousState.equals(newNetworkState)) {
+            notifyItemChanged(getItemCount() - 1);
+        }
+    }
+
+    class DataViewHolder extends RecyclerView.ViewHolder {
+        @BindView(R.id.constraint_layout_item_user_listing) ConstraintLayout constraintLayout;
+        @BindView(R.id.user_icon_gif_image_view_item_user_listing) GifImageView iconGifImageView;
+        @BindView(R.id.user_name_text_view_item_user_listing) TextView UserNameTextView;
+        @BindView(R.id.subscribe_image_view_item_user_listing) ImageView subscribeButton;
+
+        DataViewHolder(View itemView) {
+            super(itemView);
+            ButterKnife.bind(this, itemView);
+        }
+    }
+
+    class ErrorViewHolder extends RecyclerView.ViewHolder {
+        @BindView(R.id.relative_layout_footer_error_item) RelativeLayout relativeLayout;
+        @BindView(R.id.error_text_view_footer_error_item) TextView errorTextView;
+        @BindView(R.id.retry_button_footer_error_item) Button retryButton;
+
+        ErrorViewHolder(View itemView) {
+            super(itemView);
+            ButterKnife.bind(this, itemView);
+            retryButton.setOnClickListener(view -> retryLoadingMoreCallback.retryLoadingMore());
+            errorTextView.setText(R.string.load_comment_failed);
+        }
+    }
+
+    class LoadingViewHolder extends RecyclerView.ViewHolder {
+        @BindView(R.id.progress_bar_footer_progress_bar_item) ProgressBar progressBar;
+
+        LoadingViewHolder(@NonNull View itemView) {
+            super(itemView);
+            ButterKnife.bind(this, itemView);
+        }
+    }
+
+    @Override
+    public void onViewRecycled(@NonNull RecyclerView.ViewHolder holder) {
+        if(holder instanceof UserListingRecyclerViewAdapter.DataViewHolder) {
+            glide.clear(((UserListingRecyclerViewAdapter.DataViewHolder) holder).iconGifImageView);
+            ((UserListingRecyclerViewAdapter.DataViewHolder) holder).subscribeButton.setVisibility(View.GONE);
+        }
+    }
+}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingViewModel.java b/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingViewModel.java
new file mode 100644
index 00000000..6a1804db
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/UserListingViewModel.java
@@ -0,0 +1,79 @@
+package ml.docilealligator.infinityforreddit;
+
+import User.UserData;
+import androidx.annotation.NonNull;
+import androidx.arch.core.util.Function;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.Transformations;
+import androidx.lifecycle.ViewModel;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.paging.LivePagedListBuilder;
+import androidx.paging.PagedList;
+import retrofit2.Retrofit;
+
+public class UserListingViewModel extends ViewModel {
+    private UserListingDataSourceFactory UserListingDataSourceFactory;
+    private LiveData<NetworkState> paginationNetworkState;
+    private LiveData<NetworkState> initialLoadingState;
+    private LiveData<PagedList<UserData>> Users;
+
+    UserListingViewModel(Retrofit retrofit, String query,
+                              UserListingDataSource.OnUserListingDataFetchedCallback onUserListingDataFetchedCallback) {
+        UserListingDataSourceFactory = new UserListingDataSourceFactory(retrofit, query, onUserListingDataFetchedCallback);
+
+        initialLoadingState = Transformations.switchMap(UserListingDataSourceFactory.getUserListingDataSourceMutableLiveData(),
+                (Function<UserListingDataSource, LiveData<NetworkState>>) UserListingDataSource::getInitialLoadStateLiveData);
+        paginationNetworkState = Transformations.switchMap(UserListingDataSourceFactory.getUserListingDataSourceMutableLiveData(),
+                (Function<UserListingDataSource, LiveData<NetworkState>>) UserListingDataSource::getPaginationNetworkStateLiveData);
+        PagedList.Config pagedListConfig =
+                (new PagedList.Config.Builder())
+                        .setEnablePlaceholders(false)
+                        .setPageSize(25)
+                        .build();
+
+        Users = (new LivePagedListBuilder(UserListingDataSourceFactory, pagedListConfig)).build();
+    }
+
+    LiveData<PagedList<UserData>> getUsers() {
+        return Users;
+    }
+
+    LiveData<NetworkState> getPaginationNetworkState() {
+        return paginationNetworkState;
+    }
+
+    LiveData<NetworkState> getInitialLoadingState() {
+        return initialLoadingState;
+    }
+
+    void refresh() {
+        UserListingDataSourceFactory.getUserListingDataSource().invalidate();
+    }
+
+    void retry() {
+        UserListingDataSourceFactory.getUserListingDataSource().retry();
+    }
+
+    void retryLoadingMore() {
+        UserListingDataSourceFactory.getUserListingDataSource().retryLoadingMore();
+    }
+
+    public static class Factory extends ViewModelProvider.NewInstanceFactory {
+        private Retrofit retrofit;
+        private String query;
+        private UserListingDataSource.OnUserListingDataFetchedCallback onUserListingDataFetchedCallback;
+
+        public Factory(Retrofit retrofit, String query,
+                       UserListingDataSource.OnUserListingDataFetchedCallback onUserListingDataFetchedCallback) {
+            this.retrofit = retrofit;
+            this.query = query;
+            this.onUserListingDataFetchedCallback = onUserListingDataFetchedCallback;
+        }
+
+        @NonNull
+        @Override
+        public <T extends ViewModel> T create(@NonNull Class<T> modelClass) {
+            return (T) new UserListingViewModel(retrofit, query, onUserListingDataFetchedCallback);
+        }
+    }
+}
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/ViewSubredditDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/ViewSubredditDetailActivity.java
index b4127233..bce27cc8 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/ViewSubredditDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/ViewSubredditDetailActivity.java
@@ -248,20 +248,6 @@ public class ViewSubredditDetailActivity extends AppCompatActivity {
                         .execute();
                 String nOnlineSubscribers = getString(R.string.online_subscribers_number_detail, nCurrentOnlineSubscribers);
                 nOnlineSubscribersTextView.setText(nOnlineSubscribers);
-                /*ParseSubredditData.parseSubredditData(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() {
-                        makeSnackbar(R.string.cannot_fetch_subreddit_info);
-                    }
-                });*/
             }
 
             @Override
@@ -331,40 +317,4 @@ public class ViewSubredditDetailActivity extends AppCompatActivity {
             return null;
         }
     }
-
-    /*private static class CheckIsSubscribedToSubredditAsyncTask extends AsyncTask<Void, Void, Void> {
-
-        private SubscribedSubredditDao subscribedSubredditDao;
-        private String subredditName;
-        private SubscribedSubredditData subscribedSubredditData;
-        private CheckIsSubscribedToSubredditListener checkIsSubscribedToSubredditListener;
-
-        interface CheckIsSubscribedToSubredditListener {
-            void isSubscribed();
-            void isNotSubscribed();
-        }
-
-        CheckIsSubscribedToSubredditAsyncTask(SubscribedSubredditDao subscribedSubredditDao, String subredditName,
-                                              CheckIsSubscribedToSubredditListener checkIsSubscribedToSubredditListener) {
-            this.subscribedSubredditDao = subscribedSubredditDao;
-            this.subredditName =subredditName;
-            this.checkIsSubscribedToSubredditListener = checkIsSubscribedToSubredditListener;
-        }
-
-        @Override
-        protected Void doInBackground(Void... voids) {
-            subscribedSubredditData = subscribedSubredditDao.getSubscribedSubreddit(subredditName);
-            return null;
-        }
-
-        @Override
-        protected void onPostExecute(Void aVoid) {
-            super.onPostExecute(aVoid);
-            if(subscribedSubredditData != null) {
-                checkIsSubscribedToSubredditListener.isSubscribed();
-            } else {
-                checkIsSubscribedToSubredditListener.isNotSubscribed();
-            }
-        }
-    }*/
 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/ViewUserDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/ViewUserDetailActivity.java
index c5dedf11..eacca302 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/ViewUserDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/ViewUserDetailActivity.java
@@ -1,18 +1,9 @@
 package ml.docilealligator.infinityforreddit;
 
-import androidx.lifecycle.ViewModelProviders;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.Bundle;
-import com.google.android.material.chip.Chip;
-import com.google.android.material.appbar.AppBarLayout;
-import com.google.android.material.appbar.CollapsingToolbarLayout;
-import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import com.google.android.material.snackbar.Snackbar;
-import androidx.fragment.app.Fragment;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
@@ -22,17 +13,25 @@ import android.widget.TextView;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
 import com.bumptech.glide.request.RequestOptions;
+import com.google.android.material.appbar.AppBarLayout;
+import com.google.android.material.appbar.CollapsingToolbarLayout;
+import com.google.android.material.chip.Chip;
+import com.google.android.material.snackbar.Snackbar;
 
 import javax.inject.Inject;
 import javax.inject.Named;
 
 import SubscribedUserDatabase.SubscribedUserDao;
-import SubscribedUserDatabase.SubscribedUserData;
 import SubscribedUserDatabase.SubscribedUserRoomDatabase;
 import User.UserDao;
 import User.UserData;
 import User.UserRoomDatabase;
 import User.UserViewModel;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.ViewModelProviders;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import jp.wasabeef.glide.transformations.RoundedCornersTransformation;
@@ -246,7 +245,7 @@ public class ViewUserDetailActivity extends AppCompatActivity {
             }
 
             @Override
-            public void onFetchUserDataFail() {
+            public void onFetchUserDataFailed() {
                 makeSnackbar(R.string.cannot_fetch_user_info);
             }
         });
@@ -295,7 +294,7 @@ public class ViewUserDetailActivity extends AppCompatActivity {
         }
     }
 
-    private static class CheckIsFollowingUserAsyncTask extends AsyncTask<Void, Void, Void> {
+    /*private static class CheckIsFollowingUserAsyncTask extends AsyncTask<Void, Void, Void> {
 
         private SubscribedUserDao subscribedUserDao;
         private String userName;
@@ -329,5 +328,5 @@ public class ViewUserDetailActivity extends AppCompatActivity {
                 checkIsFollowingUserListener.isNotSubscribed();
             }
         }
-    }
+    }*/
 }
diff --git a/app/src/main/res/layout/fragment_user_listing.xml b/app/src/main/res/layout/fragment_user_listing.xml
new file mode 100644
index 00000000..b69ed7ae
--- /dev/null
+++ b/app/src/main/res/layout/fragment_user_listing.xml
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/coordinator_layout_user_listing_fragment"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    tools:context=".UserListingFragment">
+
+    <com.lsjwzh.widget.materialloadingprogressbar.CircleProgressBar
+        android:id="@+id/progress_bar_user_listing_fragment"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:layout_marginBottom="16dp"
+        app:mlpb_progress_stoke_width="3dp"
+        app:mlpb_progress_color="@color/colorAccent"
+        android:layout_gravity="center_horizontal"/>
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recycler_view_user_listing_fragment"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+    <LinearLayout
+        android:id="@+id/fetch_user_listing_info_linear_layout_user_listing_fragment"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="gone">
+
+        <ImageView
+            android:id="@+id/fetch_user_listing_info_image_view_user_listing_fragment"
+            android:layout_width="150dp"
+            android:layout_height="wrap_content" />
+
+        <TextView
+            android:id="@+id/fetch_user_listing_info_text_view_user_listing_fragment"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center" />
+
+    </LinearLayout>
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/item_user_listing.xml b/app/src/main/res/layout/item_user_listing.xml
new file mode 100644
index 00000000..24ba6102
--- /dev/null
+++ b/app/src/main/res/layout/item_user_listing.xml
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/constraint_layout_item_user_listing"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="16dp"
+    android:clickable="true"
+    android:focusable="true"
+    android:background="?attr/selectableItemBackground">
+
+    <pl.droidsonroids.gif.GifImageView
+        android:id="@+id/user_icon_gif_image_view_item_user_listing"
+        android:layout_width="36dp"
+        android:layout_height="36dp"
+        android:layout_gravity="center_vertical"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"/>
+
+    <TextView
+        android:id="@+id/user_name_text_view_item_user_listing"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_vertical"
+        android:layout_marginStart="32dp"
+        android:textColor="@android:color/black"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/user_icon_gif_image_view_item_user_listing"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <ImageView
+        android:id="@+id/subscribe_image_view_item_user_listing"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_vertical"
+
+        android:src="@drawable/baseline_add_white_24"
+        android:tint="@color/colorPrimary"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        android:clickable="true"
+        android:focusable="true"
+        android:background="?attr/selectableItemBackground"
+        android:visibility="gone"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index d286b264..021d5ddf 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -13,8 +13,9 @@
 
     <string name="tap_to_retry">Error loading image. Tap to retry.</string>
     <string name="load_posts_error">Error loading posts.\nTap to retry.</string>
-    <string name="no_posts">No posts here.</string>
+    <string name="no_posts">No posts found.</string>
     <string name="no_subreddits">No subreddits found.</string>
+    <string name="no_users">No users found.</string>
 
     <string name="load_posts_failed">Error loading posts</string>
     <string name="load_comment_failed">Error loading comments</string>