serially execute topic's UI changing tasks

app/src/main/java/gr/thmmy/mthmmy/activities/shoutbox/ShoutboxFragment.java

@@ -138,7 +138,7 @@ public class ShoutboxFragment extends Fragment {
             Timber.i("Shout was sent successfully");
             editorView.getEditText().getText().clear();
             shoutboxTask = new ShoutboxTask(ShoutboxFragment.this::onShoutboxTaskSarted, ShoutboxFragment.this::onShoutboxTaskFinished);
-            shoutboxTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, SessionManager.shoutboxUrl.toString());
+            shoutboxTask.execute(SessionManager.shoutboxUrl.toString());
         } else if (resultCode == NetworkResultCodes.NETWORK_ERROR) {
             Timber.w("Failed to send shout");
             Toast.makeText(getContext(), "NetworkError", Toast.LENGTH_SHORT).show();

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

@@ -762,12 +762,12 @@ class TopicAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
 
                     @Override
                     public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
-
+                        ((Post) topicItems.get(holder.getAdapterPosition())).setSubject(charSequence.toString());
                     }
 
                     @Override
                     public void afterTextChanged(Editable editable) {
-                        ((Post) topicItems.get(holder.getAdapterPosition())).setSubject(editable.toString());
+
                     }
                 });
                 holder.editEditor.getEditText().addTextChangedListener(new TextWatcher() {
@@ -778,12 +778,12 @@ class TopicAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
 
                     @Override
                     public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
-
+                        ((Post) topicItems.get(holder.getAdapterPosition())).setBbContent(charSequence.toString());
                     }
 
                     @Override
                     public void afterTextChanged(Editable editable) {
-                        ((Post) topicItems.get(holder.getAdapterPosition())).setBbContent(editable.toString());
+
                     }
                 });
                 if (backPressHidden) {

app/src/main/java/gr/thmmy/mthmmy/viewmodel/ShoutboxViewModel.java

@@ -21,7 +21,7 @@ public class ShoutboxViewModel extends ViewModel {
         if (shoutboxTask != null && shoutboxTask.getStatus() == AsyncTask.Status.RUNNING)
             shoutboxTask.cancel(true);
         shoutboxTask = new ShoutboxTask(onShoutboxTaskStarted, onShoutboxTaskFinished);
-        shoutboxTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, SessionManager.shoutboxUrl.toString());
+        shoutboxTask.execute(SessionManager.shoutboxUrl.toString());
     }
 
     public void sendShout(String shout) {

app/src/main/java/gr/thmmy/mthmmy/viewmodel/TopicViewModel.java

@@ -95,7 +95,7 @@ public class TopicViewModel extends BaseViewModel implements TopicTask.OnTopicTa
         stopLoading();
         topicUrl = pageUrl;
         currentTopicTask = new TopicTask(topicTaskObserver, this);
-        currentTopicTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, pageUrl);
+        currentTopicTask.execute(pageUrl);
     }
 
     public void reloadPage() {
@@ -122,7 +122,7 @@ public class TopicViewModel extends BaseViewModel implements TopicTask.OnTopicTa
             TopicViewModel.this.onTopicTaskCompleted(result);
             runnable.run();
         });
-        currentTopicTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, ParseHelpers.getBaseURL(topicUrl) + "." + String.valueOf(currentPageIndex * 15));
+        currentTopicTask.execute(ParseHelpers.getBaseURL(topicUrl) + "." + String.valueOf(currentPageIndex * 15));
     }
 
     public void loadPageIndicated() {
@@ -210,7 +210,7 @@ public class TopicViewModel extends BaseViewModel implements TopicTask.OnTopicTa
         Timber.i("Preparing for edit");
         currentPrepareForEditTask = new PrepareForEditTask(prepareForEditCallbacks, this, position,
                 replyPageUrl.getValue());
-        currentPrepareForEditTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, postEditURL);
+        currentPrepareForEditTask.execute(postEditURL);
     }
 
     public void editPost(int position, String subject, String message) {