benbaxter

@Override
public void getThumbnail(int index, ResultCallback callback) {
   LoadBitmapAsyncTask task = new LoadBitmapAsyncTask(index, callback);
   task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
}

class LoadBitmapAsyncTask extends AsyncTask<Void, Void, Bitmap> {

       final int mIndex;
       final ResultCallback mResultCallback;

benbaxter

@Override
public void getThumbnail(int index, final ResultCallback callback) {
  // Step 1. Get position from the index.
   long position = getSeekPositions()[index];

   // Step 2. Retrieve thumbnail in the background to not block the UI thread.
   retrieveThumbnailForPosition(position, index, (bitmap) -> {
       // Step 3. Return the thumbnail to be presented in the UI.
       callback.onThumbnailLoaded(bitmap, index);
   });

benbaxter

public class PlaybackSeekMetadataDataProvider extends PlaybackSeekDataProvider {
  //…
  public PlaybackSeekMetadataDataProvider(Context context, 
                                          String videoUrl, 
                                          long interval) {
    mContext = context;
    mVideoUrl = videoUrl;

    MediaMetadataRetriever retriever = new MediaMetadataRetriever();
    retriever.setDataSource(mVideoUrl, new HashMap<>());