title: Get count of members of a given mediastore genre without loading extra cursor
body: <p>I have a list of all genres present in my device displayed in a RecyclerView, the contents of mediastore query being fetched onBindViewHolder. I also want to display the number of songs in each genre along with the names of the genre. I have the genre id and can get the count as</p>
  
  <pre><code>int count;
              String[] projection = {MediaStore.Audio.Genres.Members.AUDIO_ID};
              String selection = MediaStore.Audio.Genres.Members.IS_MUSIC + "!=0";
              Uri uri = MediaStore.Audio.Genres.Members.getContentUri("external", id);
              Cursor tempcursor = fragmentActivity.getContentResolver().query(uri, projection, selection, null, null);
              if(tempcursor != null) {
                  count = tempcursor.getCount();
                  tempcursor.close();
              }
  </code></pre>
  
  <p>However, since I am fetching the genre cursor contents in onBindViewHolder, I cannot have an extra query which would hamper with smoothness of scrolling. There is a field called <code>MediaStore.Audio.Genres._COUNT</code>but it gives no such column found error during runtime. It will be really helpful if someone can point to a solution keeping scrolling acceptable and without changing my present app structure by a large margin. Thanks in advance</p>