@Override
public boolean doPrepar(Context context, String url, Map<String, String> headers, Object... objects) {
    release();
    TrackSelection.Factory videoTrackSelectionFactory =
            new AdaptiveVideoTrackSelection.Factory(BANDWIDTH_METER);
    DefaultTrackSelector trackSelector = new DefaultTrackSelector(mainThreadHandler, videoTrackSelectionFactory);
    simpleExoPlayer = ExoPlayerFactory.newSimpleInstance(context, trackSelector, new DefaultLoadControl(),
            null, false);
    simpleExoPlayer.setPlayWhenReady(true);
    MediaSource mediaSource = buildMediaSource(context, Uri.parse(url));
    simpleExoPlayer.addListener(ExoMedia.this);
    simpleExoPlayer.setVideoListener(ExoMedia.this);
    simpleExoPlayer.prepare(mediaSource, true, true);
    return true;
}
 

private TrackSelector createTrackSelector(){
    // Create a default TrackSelector
    // Measures bandwidth during playback. Can be null if not required.
    BandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
    TrackSelection.Factory videoTrackSelectionFactory =
            new AdaptiveVideoTrackSelection.Factory(bandwidthMeter);
    TrackSelector trackSelector =
            new DefaultTrackSelector(videoTrackSelectionFactory);
    return trackSelector;
}
 

@SuppressWarnings("unused")
protected MappingTrackSelector buildTrackSelector(HostActivity host,
    BandwidthMeter bandwidthMeter) {
  return new DefaultTrackSelector(new AdaptiveVideoTrackSelection.Factory(bandwidthMeter));
}
 

private void preparePlayer() {

        if (player == null){

            DrmSessionManager<FrameworkMediaCrypto> drmSessionManager = null;

            @SimpleExoPlayer.ExtensionRendererMode int extensionRendererMode =
                    ((EvercamPlayApplication) getApplication()).useExtensionRenderers()
                            ? (false ? SimpleExoPlayer.EXTENSION_RENDERER_MODE_PREFER
                            : SimpleExoPlayer.EXTENSION_RENDERER_MODE_ON)
                            : SimpleExoPlayer.EXTENSION_RENDERER_MODE_OFF;

            TrackSelection.Factory videoTrackSelectionFactory =
                    new AdaptiveVideoTrackSelection.Factory(BANDWIDTH_METER);

            trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);

            player = ExoPlayerFactory.newSimpleInstance(this, trackSelector, new DefaultLoadControl(),
                    drmSessionManager, extensionRendererMode);
            player.addListener(this);

            eventLogger = new EventLogger(trackSelector);
            eventLogger.addListener(this);
            player.addListener(eventLogger);
//        player.setAudioDebugListener(eventLogger);
            player.setVideoDebugListener(eventLogger);
            player.setMetadataOutput(eventLogger);

            Uri hlsUrl = Uri.parse(evercamCamera.getHlsUrl());

            MediaSource mediaSource = new HlsMediaSource(hlsUrl, mediaDataSourceFactory, mainHandler, eventLogger);


            boolean haveResumePosition = resumeWindow != C.INDEX_UNSET;
            if (haveResumePosition) {
                player.seekTo(resumeWindow, resumePosition);
            }
            player.prepare(mediaSource, !haveResumePosition, false);

            player.setPlayWhenReady(true);
            player.setVideoSurface(surface);

        }else{
            releasePlayer();
            preparePlayer();
        }


        /*DrmSessionManager<FrameworkMediaCrypto> drmSessionManager = null;

        @SimpleExoPlayer.ExtensionRendererMode int extensionRendererMode =
                ((EvercamPlayApplication) getApplication()).useExtensionRenderers()
                        ? (false ? SimpleExoPlayer.EXTENSION_RENDERER_MODE_PREFER
                        : SimpleExoPlayer.EXTENSION_RENDERER_MODE_ON)
                        : SimpleExoPlayer.EXTENSION_RENDERER_MODE_OFF;

        TrackSelection.Factory videoTrackSelectionFactory =
                new AdaptiveVideoTrackSelection.Factory(BANDWIDTH_METER);

        trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);

        player = ExoPlayerFactory.newSimpleInstance(this, trackSelector, new DefaultLoadControl(),
                drmSessionManager, extensionRendererMode);
        player.addListener(this);
        eventLogger = new EventLogger(trackSelector);
        eventLogger.addListener(this);
        player.addListener(eventLogger);
//        player.setAudioDebugListener(eventLogger);
        player.setVideoDebugListener(eventLogger);
        player.setMetadataOutput(eventLogger);
        Uri hlsUrl = Uri.parse(evercamCamera.getHlsUrl());
        MediaSource mediaSource = new HlsMediaSource(hlsUrl, mediaDataSourceFactory, mainHandler, eventLogger);

        player.prepare(mediaSource);
        player.setPlayWhenReady(true);
        player.setVideoSurface(surface);*/
    }