Adapter swap on topic's page change (instead of activity restart).

app/src/main/java/gr/thmmy/mthmmy/activities/topic/TopicActivity.java

@@ -7,8 +7,6 @@ import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Handler;
 import android.support.design.widget.FloatingActionButton;
-import android.support.v4.app.ActivityOptionsCompat;
-import android.support.v4.util.Pair;
 import android.support.v7.app.AlertDialog;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
@@ -79,6 +77,8 @@ public class TopicActivity extends BaseActivity {
     private String topicTitle;
     private FloatingActionButton replyFAB;
     private String parsedTitle;
+    private RecyclerView recyclerView;
+    private RecyclerView.LayoutManager layoutManager;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -101,7 +101,6 @@ public class TopicActivity extends BaseActivity {
 
         postsList = new ArrayList<>();
 
-
         firstPage = (ImageButton) findViewById(R.id.page_first_button);
         previousPage = (ImageButton) findViewById(R.id.page_previous_button);
         pageIndicator = (TextView) findViewById(R.id.page_indicator);
@@ -166,6 +165,12 @@ public class TopicActivity extends BaseActivity {
             }
         });
 
+        recyclerView = (RecyclerView)findViewById(R.id.topic_recycler_view);
+        recyclerView.setHasFixedSize(true);
+        layoutManager = new LinearLayoutManager(getApplicationContext());
+        recyclerView.setLayoutManager(layoutManager);
+        recyclerView.setAdapter(new TopicAdapter(getApplicationContext(), postsList));
+
         new TopicTask().execute(extras.getString("TOPIC_URL")); //Attempt data parsing
     }
 
@@ -292,17 +297,7 @@ public class TopicActivity extends BaseActivity {
 
     private void changePage(int pageRequested) {
         if (pageRequested != thisPage - 1) {
-            //Restart activity with new page
-            Pair<View, String> p1 = Pair.create((View) replyFAB, "fab");
-            Pair<View, String> p2 = Pair.create((View) toolbar, "toolbar");
-            ActivityOptionsCompat options = ActivityOptionsCompat.
-                    makeSceneTransitionAnimation(this, p1, p2);
-
-            Intent intent = getIntent();
-            intent.putExtra("TOPIC_URL", pagesUrls.get(pageRequested));
-            intent.putExtra("TOPIC_TITLE", topicTitle);
-            startActivity(intent, options.toBundle());
-            finish();
+            new TopicTask().execute(pagesUrls.get(pageRequested)); //Attempt data parsing
         }
     }
 //------------------------------------BOTTOM NAV BAR METHODS END------------------------------------
@@ -315,6 +310,7 @@ public class TopicActivity extends BaseActivity {
         //Show a progress bar until done
         protected void onPreExecute() {
             progressBar.setVisibility(ProgressBar.VISIBLE);
+            replyFAB.setEnabled(false);
         }
 
         protected Boolean doInBackground(String... strings) {
@@ -324,6 +320,7 @@ public class TopicActivity extends BaseActivity {
 
             //Find message focus if present
             {
+                postFocus = NO_POST_FOCUS;
                 if (pageUrl.contains("msg")) {
                     String tmp = pageUrl.substring(pageUrl.indexOf("msg") + 3);
                     if (tmp.contains(";"))
@@ -414,13 +411,7 @@ public class TopicActivity extends BaseActivity {
      * adds a card for each post to the ScrollView.
      */
     private void populateLayout() {
-        RecyclerView recyclerView = (RecyclerView)findViewById(R.id.topic_recycler_view);
-        recyclerView.setHasFixedSize(true);
-        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
-        recyclerView.setLayoutManager(layoutManager);
-
-        TopicAdapter adapter = new TopicAdapter(getApplicationContext(), postsList);
-        recyclerView.setAdapter(adapter);
+        recyclerView.swapAdapter(new TopicAdapter(getApplicationContext(), postsList), false);
 
         //Set post focus
         if (postFocus != NO_POST_FOCUS) {

app/src/main/java/gr/thmmy/mthmmy/activities/topic/TopicAdapter.java

@@ -305,7 +305,7 @@ class TopicAdapter extends RecyclerView.Adapter<TopicAdapter.MyViewHolder> {
             holder.username.setMaxLines(Integer.MAX_VALUE);
             holder.username.setEllipsize(null);
 
-            holder.subject.setTextColor(Color.parseColor("#000000"));
+            holder.subject.setTextColor(Color.parseColor("#FFFFFF"));
             holder.subject.setMaxLines(Integer.MAX_VALUE);
             holder.subject.setEllipsize(null);
         } else { //Collapsed
@@ -332,7 +332,7 @@ class TopicAdapter extends RecyclerView.Adapter<TopicAdapter.MyViewHolder> {
 
                 TopicAnimations.animatePostExtraInfoVisibility(holder.postDateAndNumberExp
                         , holder.username, holder.subject
-                        , Color.parseColor("#000000")
+                        , Color.parseColor("#FFFFFF")
                         , Color.parseColor("#757575"));
             }
         });