Lagu

Aplikasi Android TV Anda dapat mendukung beberapa trek audio/teks untuk berbagai bahasa dan setelan suara surround dengan cara yang sama seperti aplikasi penerima web. Untuk mendukung beberapa jalur dan pemilihan trek, Anda perlu mengimplementasikan hal berikut di aplikasi Android TV:

Berikan info dan status jalur

Untuk MediaInfo level atas, berikan MediaTracks yang tersedia menggunakan MediaInfoModifier:

Kotlin

val mediaInfoModifier = CastReceiverContext.getInstance()
            .mediaManager.mediaStatusModifier.mediaInfoModifier

mediaInfoModifier.setMediaTracks(Arrays.asList(
    new MediaTrack.Builder(1, MediaTrack.TYPE_AUDIO)
        .setName("English")
        ...
        build(),
    new MediaTrack.Builder(2, MediaTrack.TYPE_AUDIO)
        .setName("Spanish")
        ...
        .build()
  ))

Java

MediaInfoModifier mediaInfoModifier = CastReceiverContext.getInstance()
    .getMediaManager().getMediaStatusModifier().getMediaInfoModifier();

mediaInfoModifier.setMediaTracks(Arrays.asList(
    new MediaTrack.Builder(1, MediaTrack.TYPE_AUDIO)
        .setName("English")
        ...
        build(),
    new MediaTrack.Builder(2, MediaTrack.TYPE_AUDIO)
        .setName("Spanish")
        ...
        .build()
  ));

Gunakan MediaTracksModifier untuk mencerminkan jalur yang saat ini dipilih:

Kotlin

val mediaStatusModifier: MediaTracksModifier =
      CastReceiverContext.getInstance()
          .mediaManager.mediaStatusModifier.getMediaTracksModifer()

MediaTracksModifier.setActiveTrackIds(longArrayOf(1))

Java

MediaTracksModifier mediaStatusModifier =
  CastReceiverContext.getInstance()
    .getMediaManager().getMediaStatusModifier().getMediaTracksModifer();

MediaTracksModifier.setActiveTrackIds(new long[]{1});

Langkah-langkah di atas dapat memastikan dialog pemilihan pelacakan pengirim mencerminkan status yang benar.

Menangani pemilihan trek

Untuk mendukung pemilihan jalur, Anda harus terlebih dahulu mendeklarasikan MediaStatus.COMMAND_EDIT_TRACKS sebagai perintah media yang didukung di MediaStatusModifier:

Kotlin

CastReceiverContext
    .getInstance()
    .getMediaManager()
    .getMediaStatusModifier()
    .setMediaCommandSupported(MediaStatus.COMMAND_EDIT_TRACKS, true)

Java

CastReceiverContext
    .getInstance()
    .getMediaManager()
    .getMediaStatusModifier()
    .setMediaCommandSupported(MediaStatus.COMMAND_EDIT_TRACKS, true);

Saat pengguna memilih jalur dalam dialog pemilihan trek di sisi pengirim, aplikasi Android TV Anda akan menerima callback untuk mengubah jalur yang dipilih. Tangani perintah dengan mengganti MediaCommandCallback:

Kotlin

class MyMediaCommandCallback : MediaCommandCallback() {
  /** Text selection callback scoped to individual track types.  */
  override fun onSelectTracksByType(
        senderId: String?, type: Int, tracks: List
    ): Task {
    return Tasks.call {
        // Update the track selection in your app.
        if (type == MediaTrack.TYPE_TEXT) {
             mySelectTextTracks(tracks)
        } else if (type == MediaTrack.TYPE_AUDIO) {
             mySelectAudioTracks(tracks)
        }
        // Update the track selection in the modifier to be used in MediaStatus.
        // This is also scoped to the given track type.
        mediaStatusModifier.getMediaTracksModifier().setActiveTracksByType(
            type, tracks
        )
        null
    }
  }

  /** Callback for setting the text track style.  */
  override fun onSetTextTrackStyle(
        senderId: String?, textTrackStyle: TextTrackStyle
    ): Task {
    return Tasks.call {
        // Update the track style in your app.
        mySetTextTrackStyle(textTrackStyle)
        // Update the track style in the modifier.
        mediaStatusModifier.setTextTrackStyle(textTrackStyle)
        null
    }
  }

  // Override the following callback in case you want to handle the original
  // request. This is strongly not recommended.
  //
  // The default implementation automatically translates into
  // onSelectTracksByType() and onSetTextTrackStyle().
  override fun onEditTracksInfo(
    senderId: String?, editTracksInfoData: EditTracksInfoData
    ): Task {
       ...
  }

  // Override the following callback in case you want to handle the original
  // request. This is strongly not recommended.
  override fun onEditAudioTracks(
      senderId: String?, editAudioTracksData: EditAudioTracksData
    ): Task {
        ...
  }
}

Java

public class MyMediaCommandCallback extends MediaCommandCallback {
  /** Text selection callback scoped to individual track types. */
  @Override
  public Task onSelectTracksByType(
    String senderId, int type, List tracks) {
    return Tasks.call(() -> {
      // Update the track selection in your app.
      if (type == MediaTrack.TYPE_TEXT) {
        mySelectTextTracks(tracks);
      } else if (type == MediaTrack.TYPE_AUDIO) {
        mySelectAudioTracks(tracks);
      }
      // Update the track selection in the modifier to be used in MediaStatus.
      // This is also scoped to the given track type.
      mediaStatusModifier.getMediaTracksModifier().setActiveTracksByType(
        type, tracks);
      return null;
    });
  }

  /** Callback for setting the text track style. */
  @Override
  public Task onSetTextTrackStyle(
    String senderId, TextTrackStyle textTrackStyle) {
    return Tasks.call(() -> {
      // Update the track style in your app.
      mySetTextTrackStyle(textTrackStyle);
      // Update the track style in the modifier.
      mediaStatusModifier.setTextTrackStyle(textTrackStyle);
      return null;
    });
  }

  // Override the following callback in case you want to handle the original
  // request. This is strongly not recommended.
  //
  // The default implementation automatically translates into
  // onSelectTracksByType() and onSetTextTrackStyle().
  @Override
  public Task onEditTracksInfo(
    String senderId, EditTracksInfoData editTracksInfoData) {
    ...
  }

  // Override the following callback in case you want to handle the original
  // request. This is strongly not recommended.
  @Override
  public Task onEditAudioTracks(
    String senderId, EditAudioTracksData editAudioTracksData) {
    ...
  }
}