listen for recent updates

app/src/main/java/gr/thmmy/mthmmy/activities/main/recent/RecentFragment.java

@@ -11,6 +11,7 @@ import android.widget.Toast;
 import com.google.firebase.firestore.DocumentReference;
 import com.google.firebase.firestore.DocumentSnapshot;
 import com.google.firebase.firestore.FirebaseFirestore;
+import com.google.firebase.firestore.ListenerRegistration;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -39,11 +40,12 @@ public class RecentFragment extends BaseFragment {
     // Fragment initialization parameters, e.g. ARG_SECTION_NUMBER
 
     private MaterialProgressBar progressBar;
-    private SwipeRefreshLayout swipeRefreshLayout;
     private RecentAdapter recentAdapter;
 
     private ArrayList<RecentItem> recentItems = new ArrayList<>();
 
+    private ListenerRegistration recentSnapshotListener;
+
     // Required empty public constructor
     public RecentFragment() {
     }
@@ -78,21 +80,23 @@ public class RecentFragment extends BaseFragment {
                 .document("recent");
         docRef.get().addOnCompleteListener(task -> {
             progressBar.setVisibility(ProgressBar.INVISIBLE);
-            if (task.isSuccessful()) {
-                DocumentSnapshot recentDocument = task.getResult();
-                ArrayList<HashMap<String, Object>> posts = (ArrayList<HashMap<String, Object>>) recentDocument.get("posts");
-                for (HashMap<String, Object> map : posts) {
-                    RecentItem recentItem = new RecentItem(map);
-                    recentItems.add(recentItem);
-                }
-                recentAdapter.notifyDataSetChanged();
-            } else {
-                Toast.makeText(getContext(), "Network error", Toast.LENGTH_SHORT).show();
-            }
+
+            if (task.isSuccessful()) onNewDocumentSnapshot(task.getResult());
+            else Toast.makeText(getContext(), "Network error", Toast.LENGTH_SHORT).show();
         });
+        recentSnapshotListener = docRef.addSnapshotListener((documentSnapshot, e) -> {
+                    Timber.i("New doc");
+                    onNewDocumentSnapshot(documentSnapshot);
+                }
+        );
         progressBar.setVisibility(ProgressBar.VISIBLE);
     }
 
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        recentSnapshotListener.remove();
+    }
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
@@ -112,15 +116,21 @@ public class RecentFragment extends BaseFragment {
                     linearLayoutManager.getOrientation());
             recyclerView.addItemDecoration(dividerItemDecoration);
             recyclerView.setAdapter(recentAdapter);
-
-            swipeRefreshLayout = rootView.findViewById(R.id.swiperefresh);
-            swipeRefreshLayout.setProgressBackgroundColorSchemeResource(R.color.primary);
-            swipeRefreshLayout.setColorSchemeResources(R.color.accent);
         }
 
         return rootView;
     }
 
+    public void onNewDocumentSnapshot(DocumentSnapshot recentDocument) {
+        recentItems.clear();
+        ArrayList<HashMap<String, Object>> posts = (ArrayList<HashMap<String, Object>>) recentDocument.get("posts");
+        for (HashMap<String, Object> map : posts) {
+            RecentItem recentItem = new RecentItem(map);
+            recentItems.add(recentItem);
+        }
+        recentAdapter.notifyDataSetChanged();
+    }
+
 
     public interface RecentFragmentInteractionListener extends FragmentInteractionListener {
         void onRecentFragmentInteraction(RecentItem topicSummary);

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

@@ -1,28 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout 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"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
-        android:id="@+id/swiperefresh"
+    <gr.thmmy.mthmmy.utils.CustomRecyclerView
+        android:id="@+id/list"
+        android:name="gr.thmmy.mthmmy.sections.recent.RecentFragment"
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
-
-        <gr.thmmy.mthmmy.utils.CustomRecyclerView
-            android:id="@+id/list"
-            android:name="gr.thmmy.mthmmy.sections.recent.RecentFragment"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:background="@color/background"
-            android:paddingBottom="4dp"
-            android:paddingTop="4dp"
-            app:layoutManager="LinearLayoutManager"
-            tools:context=".activities.main.recent.RecentFragment"
-            tools:listitem="@layout/fragment_recent_row"/>
-    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
+        android:layout_height="match_parent"
+        android:background="@color/background"
+        android:paddingTop="4dp"
+        android:paddingBottom="4dp"
+        app:layoutManager="LinearLayoutManager"
+        tools:context=".activities.main.recent.RecentFragment"
+        tools:listitem="@layout/fragment_recent_row" />
 
     <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/progressBar"
@@ -33,5 +26,5 @@
         android:indeterminate="true"
         android:visibility="invisible"
         app:mpb_indeterminateTint="@color/accent"
-        app:mpb_progressStyle="horizontal"/>
+        app:mpb_progressStyle="horizontal" />
 </RelativeLayout>