How to use tv.danmaku.ijk.media.exo.demo

@Override
public void onAudioTrackUnderrun(int bufferSize, long bufferSizeMs, long elapsedSinceLastFeedMs) {
 printInternalError("audioTrackUnderrun [" + bufferSize + ", " + bufferSizeMs + ", "
   + elapsedSinceLastFeedMs + "]", null);
}

@Override
public void onAudioTrackUnderrun(int bufferSize, long bufferSizeMs, long elapsedSinceLastFeedMs) {
 printInternalError("audioTrackUnderrun [" + bufferSize + ", " + bufferSizeMs + ", "
   + elapsedSinceLastFeedMs + "]", null);
}

@Override
public void onAudioTrackUnderrun(int bufferSize, long bufferSizeMs, long elapsedSinceLastFeedMs) {
 printInternalError("audioTrackUnderrun [" + bufferSize + ", " + bufferSizeMs + ", "
   + elapsedSinceLastFeedMs + "]", null);
}

@Override
public void onRendererInitializationError(Exception e) {
 printInternalError("rendererInitError", e);
}

@Override
public void onDrmSessionManagerError(Exception e) {
 printInternalError("drmSessionManagerError", e);
}

@Override
public void onCryptoError(CryptoException e) {
 printInternalError("cryptoError", e);
}

@Override
public void onDecoderInitializationError(DecoderInitializationException e) {
 printInternalError("decoderInitializationError", e);
}

@Override
public void onCryptoError(CryptoException e) {
 printInternalError("cryptoError", e);
}

@Override
public void onAudioTrackInitializationError(AudioTrack.InitializationException e) {
 printInternalError("audioTrackInitializationError", e);
}

@Override
public void onLoadError(int sourceId, IOException e) {
 printInternalError("loadError", e);
}

@Override
public void onRendererInitializationError(Exception e) {
 printInternalError("rendererInitError", e);
}

@Override
public void onDecoderInitializationError(DecoderInitializationException e) {
 printInternalError("decoderInitializationError", e);
}

@Override
public void onAudioTrackInitializationError(AudioTrack.InitializationException e) {
 printInternalError("audioTrackInitializationError", e);
}

@Override
public void onDrmSessionManagerError(Exception e) {
 printInternalError("drmSessionManagerError", e);
}

@Override
public void onLoadError(int sourceId, IOException e) {
 printInternalError("loadError", e);
}

@Override
public void onDecoderInitializationError(DecoderInitializationException e) {
 printInternalError("decoderInitializationError", e);
}

@Override
public void onAudioTrackInitializationError(AudioTrack.InitializationException e) {
 printInternalError("audioTrackInitializationError", e);
}

@Override
public void onAudioTrackWriteError(AudioTrack.WriteException e) {
 printInternalError("audioTrackWriteError", e);
}

@Override
public void onAudioTrackWriteError(AudioTrack.WriteException e) {
 printInternalError("audioTrackWriteError", e);
}

@Override
public void onCryptoError(CryptoException e) {
 printInternalError("cryptoError", e);
}