Refreshing posts is working now.

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

@@ -12,6 +12,7 @@ class PostDataSourceFactory extends DataSource.Factory {
     private String accessToken;
     private Locale locale;
     private String subredditName;
+    private boolean isBestPost;
 
     private PostDataSource postDataSource;
     private MutableLiveData<PostDataSource> postDataSourceLiveData;
@@ -21,12 +22,7 @@ class PostDataSourceFactory extends DataSource.Factory {
         this.accessToken = accessToken;
         this.locale = locale;
         postDataSourceLiveData = new MutableLiveData<>();
-
+        this.isBestPost = isBestPost;
-        if(isBestPost) {
-            postDataSource = new PostDataSource(retrofit, accessToken, locale, isBestPost);
-        } else {
-            postDataSource = new PostDataSource(retrofit, locale, isBestPost, subredditName);
-        }
     }
 
     PostDataSourceFactory(Retrofit retrofit, Locale locale, boolean isBestPost, String subredditName) {
@@ -34,16 +30,17 @@ class PostDataSourceFactory extends DataSource.Factory {
         this.locale = locale;
         this.subredditName = subredditName;
         postDataSourceLiveData = new MutableLiveData<>();
+        this.isBestPost = isBestPost;
+    }
 
+    @Override
+    public DataSource create() {
         if(isBestPost) {
             postDataSource = new PostDataSource(retrofit, accessToken, locale, isBestPost);
         } else {
             postDataSource = new PostDataSource(retrofit, locale, isBestPost, subredditName);
         }
-    }
 
-    @Override
-    public DataSource create() {
         postDataSourceLiveData.postValue(postDataSource);
         return postDataSource;
     }

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

@@ -11,7 +11,6 @@ import android.support.design.widget.Snackbar;
 import android.support.v4.app.Fragment;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -137,7 +136,6 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
         });
 
         mPostViewModel.getPaginationNetworkState().observe(this, networkState -> {
-            Log.i("networkstate", networkState.getStatus().toString());
             mAdapter.setNetworkState(networkState);
         });
 
@@ -146,7 +144,7 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
 
     @Override
     public void refresh() {
-
+        mPostViewModel.refresh();
     }
 
     private void showErrorView() {

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

@@ -13,13 +13,13 @@ import java.util.Locale;
 import retrofit2.Retrofit;
 
 public class PostViewModel extends ViewModel {
-    private PostDataSource postDataSource;
+    private PostDataSourceFactory postDataSourceFactory;
     private LiveData<NetworkState> paginationNetworkState;
     private LiveData<NetworkState> initialLoadingState;
     private LiveData<PagedList<Post>> posts;
 
     public PostViewModel(Retrofit retrofit, String accessToken, Locale locale, boolean isBestPost) {
-        PostDataSourceFactory postDataSourceFactory = new PostDataSourceFactory(retrofit, accessToken, locale, isBestPost);
+        postDataSourceFactory = new PostDataSourceFactory(retrofit, accessToken, locale, isBestPost);
 
         initialLoadingState = Transformations.switchMap(postDataSourceFactory.getPostDataSourceLiveData(),
                 dataSource -> dataSource.getInitialLoadStateLiveData());
@@ -32,11 +32,10 @@ public class PostViewModel extends ViewModel {
                         .build();
 
         posts = (new LivePagedListBuilder(postDataSourceFactory, pagedListConfig)).build();
-        postDataSource = postDataSourceFactory.getPostDataSource();
     }
 
     public PostViewModel(Retrofit retrofit, Locale locale, boolean isBestPost, String subredditName) {
-        PostDataSourceFactory postDataSourceFactory = new PostDataSourceFactory(retrofit, locale, isBestPost, subredditName);
+        postDataSourceFactory = new PostDataSourceFactory(retrofit, locale, isBestPost, subredditName);
 
         initialLoadingState = Transformations.switchMap(postDataSourceFactory.getPostDataSourceLiveData(),
                 dataSource -> dataSource.getInitialLoadStateLiveData());
@@ -50,7 +49,6 @@ public class PostViewModel extends ViewModel {
                         .build();
 
         posts = (new LivePagedListBuilder(postDataSourceFactory, pagedListConfig)).build();
-        postDataSource = postDataSourceFactory.getPostDataSource();
     }
 
     LiveData<PagedList<Post>> getPosts() {
@@ -61,16 +59,20 @@ public class PostViewModel extends ViewModel {
         return paginationNetworkState;
     }
 
-    public LiveData<NetworkState> getInitialLoadingState() {
+    LiveData<NetworkState> getInitialLoadingState() {
         return initialLoadingState;
     }
 
+    void refresh() {
+        postDataSourceFactory.getPostDataSource().invalidate();
+    }
+
     void retry() {
-        postDataSource.retry();
+        postDataSourceFactory.getPostDataSource().retry();
     }
 
     void retryLoadingMore() {
-        postDataSource.retryLoadingMore();
+        postDataSourceFactory.getPostDataSource().retryLoadingMore();
     }
 
     public static class Factory extends ViewModelProvider.NewInstanceFactory {

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

@@ -1,10 +0,0 @@
-<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">
-    <item
-        android:id="@+id/action_settings"
-        android:orderInCategory="100"
-        android:title="@string/action_settings"
-        app:showAsAction="never" />
-</menu>

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

@@ -8,5 +8,5 @@
         android:orderInCategory="1"
         android:title="@string/action_refresh"
         android:icon="@drawable/ic_refresh_white_24dp"
-        app:showAsAction="always" />
+        app:showAsAction="never" />
 </menu>