set window soft input mode to adjust pan instead of hiding bottom navigation bar

app/src/main/AndroidManifest.xml

@@ -72,7 +72,8 @@
             android:name=".activities.topic.TopicActivity"
             android:configChanges="orientation|screenSize"
             android:parentActivityName=".activities.main.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar">
+            android:theme="@style/AppTheme.NoActionBar"
+            android:windowSoftInputMode="adjustPan">
             <meta-data
                 android:name="android.support.PARENT_ACTIVITY"
                 android:value=".activities.main.MainActivity" />

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

@@ -254,6 +254,7 @@ public class TopicActivity extends BaseActivity implements TopicTask.TopicTaskOb
                 topicAdapter.notifyItemInserted(postsList.size());
                 recyclerView.scrollToPosition(postsList.size() - 1);
                 showControls();
+                replyFAB.setVisibility(View.GONE);
             }
 
         });
@@ -348,7 +349,6 @@ public class TopicActivity extends BaseActivity implements TopicTask.TopicTaskOb
             topicAdapter.notifyItemRemoved(postsList.size());
             topicAdapter.setBackButtonHidden();
             replyFAB.setVisibility(View.INVISIBLE);
-            bottomNavBar.setVisibility(View.INVISIBLE);
             paginationEnabled(true);
             replyFAB.setEnabled(true);
             return;
@@ -563,6 +563,7 @@ public class TopicActivity extends BaseActivity implements TopicTask.TopicTaskOb
         topicAdapter.notifyItemRemoved(postsList.size());
 
         showControls();
+        replyFAB.setVisibility(View.VISIBLE);
         viewModel.setWritingReply(false);
 
         if (success) {
@@ -574,7 +575,6 @@ public class TopicActivity extends BaseActivity implements TopicTask.TopicTaskOb
         } else {
             Toast.makeText(TopicActivity.this, "Post failed!", Toast.LENGTH_SHORT).show();
         }
-
     }
 
     @Override

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

@@ -172,6 +172,7 @@ public class TopicViewModel extends BaseViewModel implements TopicTask.OnTopicTa
     public void prepareForEdit(int position, String postEditURL) {
         if (topicTaskResult.getValue() == null)
             throw new NullPointerException("Topic task has not finished yet!");
+        stopLoading();
         currentPrepareForEditTask = new PrepareForEditTask(prepareForEditCallbacks, this, position,
                 topicTaskResult.getValue().getReplyPageUrl());
         currentPrepareForEditTask.execute(postEditURL);
@@ -187,6 +188,8 @@ public class TopicViewModel extends BaseViewModel implements TopicTask.OnTopicTa
 
     /**
      * cancel tasks that change the ui
+     * topic, prepare for edit, prepare for reply tasks need to cancel all other ui changing tasks
+     * before starting
      */
     public void stopLoading() {
         if (currentTopicTask != null && currentTopicTask.getStatus() == AsyncTask.Status.RUNNING) {
@@ -201,7 +204,8 @@ public class TopicViewModel extends BaseViewModel implements TopicTask.OnTopicTa
             currentPrepareForReplyTask.cancel(true);
             prepareForReplyCallbacks.onPrepareForReplyCancelled();
         }
-        // no need to cancel reply, edit and delete task for navigation
+        // no need to cancel reply, edit and delete task, user should not have to wait for the ui
+        // after he is done posting, editing or deleting
     }
 
     @Override