بازیابی متادیتا

override fun onMediaMetadataChanged(mediaMetadata: MediaMetadata) {
  mediaMetadata.title?.let(::handleTitle)
}

@Override
public void onMediaMetadataChanged(MediaMetadata mediaMetadata) {
  if (mediaMetadata.title != null) {
    handleTitle(mediaMetadata.title);
  }
}

suspend fun retrievingMetadataRetrieveMetadataWithoutPlayback(
  context: Context,
  mediaItem: MediaItem,
) {
  try {
    MetadataRetriever.Builder(context, mediaItem).build().use { metadataRetriever ->
      val trackGroups = metadataRetriever.retrieveTrackGroups().await()
      val timeline = metadataRetriever.retrieveTimeline().await()
      val durationUs = metadataRetriever.retrieveDurationUs().await()
      handleMetadata(trackGroups, timeline, durationUs)
    }
  } catch (e: IOException) {
    handleFailure(e)
  }
}

try (MetadataRetriever metadataRetriever =
    new MetadataRetriever.Builder(context, mediaItem).build()) {
  ListenableFuture<TrackGroupArray> trackGroupsFuture = metadataRetriever.retrieveTrackGroups();
  ListenableFuture<Timeline> timelineFuture = metadataRetriever.retrieveTimeline();
  ListenableFuture<Long> durationUsFuture = metadataRetriever.retrieveDurationUs();
  ListenableFuture<List<Object>> allFutures =
      Futures.allAsList(trackGroupsFuture, timelineFuture, durationUsFuture);
  Futures.addCallback(
      allFutures,
      new FutureCallback<List<Object>>() {
        @Override
        public void onSuccess(List<Object> result) {
            handleMetadata(
                Futures.getUnchecked(trackGroupsFuture),
                Futures.getUnchecked(timelineFuture),
                Futures.getUnchecked(durationUsFuture));
        }

        @Override
        public void onFailure(Throwable t) {
          handleFailure(t);
        }
      },
      executor);
}

0.until(trackGroups.length)
  .asSequence()
  .mapNotNull { trackGroups[it].getFormat(0).metadata }
  .filter { metadata -> metadata.length() == 1 }
  .map { metadata -> metadata[0] }
  .filterIsInstance<MotionPhotoMetadata>()
  .forEach(::handleMotionPhotoMetadata)

for (int i = 0; i < trackGroups.length; i++) {
  TrackGroup trackGroup = trackGroups.get(i);
  Metadata metadata = trackGroup.getFormat(0).metadata;
  if (metadata != null && metadata.length() == 1) {
    Metadata.Entry metadataEntry = metadata.get(0);
    if (metadataEntry instanceof MotionPhotoMetadata) {
      MotionPhotoMetadata motionPhotoMetadata = (MotionPhotoMetadata) metadataEntry;
      handleMotionPhotoMetadata(motionPhotoMetadata);
    }
  }
}