make tabs contain icons instead of title

app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java

@@ -84,6 +84,15 @@ public class MainFragment extends BaseFragment implements TabLayout.OnTabSelecte
         viewPager.setOffscreenPageLimit(adapter.getCount());
 
         tabLayout.setupWithViewPager(viewPager);
+
+       if(PreferenceManager.getDefaultSharedPreferences(getActivity())
+                .getString(getString(R.string.main_page_content_key), getString(R.string.blank_page_key))
+                .equals(getString(R.string.subscription_page_key))) {
+           tabLayout.getTabAt(0).setIcon(R.drawable.ic_channel_white_24dp);
+       } else {
+           tabLayout.getTabAt(0).setIcon(R.drawable.ic_whatshot_white_24dp);
+           tabLayout.getTabAt(1).setIcon(R.drawable.ic_channel_white_24dp);
+       }
     }
 
     /*//////////////////////////////////////////////////////////////////////////
@@ -171,7 +180,8 @@ public class MainFragment extends BaseFragment implements TabLayout.OnTabSelecte
 
         @Override
         public CharSequence getPageTitle(int position) {
-            return getString(this.tabTitles[position]);
+            //return getString(this.tabTitles[position]);
+            return "";
         }
 
         @Override

app/src/main/java/org/schabi/newpipe/fragments/subscription/SubscriptionFragment.java

@@ -62,7 +62,6 @@ public class SubscriptionFragment extends BaseStateFragment<List<SubscriptionEnt
     @Nullable
     @Override
     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
-        activity.getSupportActionBar().setDisplayShowTitleEnabled(true);
         activity.getSupportActionBar().setDisplayShowTitleEnabled(true);
         activity.setTitle(R.string.tab_subscriptions);
         return inflater.inflate(R.layout.fragment_subscription, container, false);