Chromecast SDK (Android) - 有没有办法检查投射设备上播放的媒体是否已经播放完毕？答案

【问题标题】：Chromecast SDK (Android) - is there a way to check whether the media playing on the cast device has finished playing?Chromecast SDK (Android) - 有没有办法检查投射设备上播放的媒体是否已经播放完毕？
【发布时间】：2013-11-07 21:14:25
【问题描述】：

是否有某种 onFinished 监听器？还是我们必须将当前的流位置与曲目的持续时间进行比较？

【问题讨论】：

标签： android google-cast chromecast

【解决方案1】：

它不漂亮，但你可以打这个电话：

if (mRemoteMediaPlayer.getMediaStatus().getPlayerState() ==  MediaStatus.PLAYER_STATE_IDLE
    && mRemoteMediaPlayer.getMediaStatus().getIdleReason() ==  MediaStatus.IDLE_REASON_FINISHED) {
  ...

}

【讨论】：

【解决方案2】：

Prem, 目前没有回调来注册此类事件。一种替代方法（但不那么漂亮）如下：在接收器上，侦听媒体元素的“结束”事件，并通过私有通道将事件发送回发送者。您建议的另一种方法是：根据持续时间检查位置。当 SDK 全面普及时，将有更好、更简洁的方法来实现您想要的。

【讨论】：

有什么更新吗？

【解决方案3】：

解决方案如下：你只需要多取一个变量mIdleReason。

1) 将mIdleReason初始化为

public int mIdleReason=MediaStatus.IDLE_REASON_NONE;

2) 在方法 loadMedia 处更新值

 public void loadMedia(String url, MediaMetadata movieMetadata, CastSession castSession, boolean autoPlay, long position) {
        if (castSession == null || !castSession.isConnected()) {
            return;
        }
        MediaInfo mediaInfo = new MediaInfo.Builder(url)
                .setStreamType(MediaInfo.STREAM_TYPE_BUFFERED)
                .setContentType("videos/m3u8")
                .setMetadata(movieMetadata)
                .build();
        mRemoteMediaClient = castSession.getRemoteMediaClient();
        mRemoteMediaClient.addListener(mRemoteMediaClientListener);
        mRemoteMediaClient.load(mediaInfo, autoPlay, position);

        mIdleReason = MediaStatus.IDLE_REASON_NONE;
    }

3) 在 onStatusUpdate 处更新值：

 private RemoteMediaClient.Listener mRemoteMediaClientListener = new RemoteMediaClient.Listener() {
            @Override
            public void onStatusUpdated() {
                if (mRemoteMediaClient == null || mediaPlayerListener == null) {
                    return;
                }
                MediaStatus mediaStatus = mRemoteMediaClient.getMediaStatus();

                if (mediaStatus != null) {
                    int playerStatus = mediaStatus.getPlayerState();
                    Log.d("PlayerState", "onStatusUpdated() called, progress= "+mSeekBar.getProgress() +", stream duration= "+ mRemoteMediaClient.getStreamDuration()+" mSeekBar.getProgress() == mRemoteMediaClient.getStreamDuration()="+(mSeekBar.getProgress() == mRemoteMediaClient.getStreamDuration()));
                    Log.d("PlayerState", "onStatusUpdated() called playerStatus="+playerStatus+", idleReason="+mediaStatus.getIdleReason());

 if (playerStatus == MediaStatus.PLAYER_STATE_PLAYING) {
                        mediaPlayerListener.playing();
                        mIdleReason = MediaStatus.IDLE_REASON_FINISHED;
                    } else if (playerStatus == MediaStatus.PLAYER_STATE_BUFFERING) {
                        mediaPlayerListener.buffering();
                        mIdleReason = MediaStatus.IDLE_REASON_FINISHED;
                    } else if (playerStatus == MediaStatus.PLAYER_STATE_PAUSED) {
                        mediaPlayerListener.paused();
                    } else if (playerStatus == MediaStatus.IDLE_REASON_INTERRUPTED) {
                        mediaPlayerListener.error();
                    } else if (playerStatus == MediaStatus.IDLE_REASON_ERROR) {
                        mediaPlayerListener.error();
                    }else if(playerStatus == MediaStatus.PLAYER_STATE_IDLE && mediaStatus.getIdleReason() == MediaStatus.IDLE_REASON_FINISHED&& mIdleReason == MediaStatus.IDLE_REASON_FINISHED){
                        mediaPlayerListener.played();
                    }
                }
            }

            @Override
            public void onMetadataUpdated() {
                Log.d("", "onMetadataUpdated: ");
            }

            @Override
            public void onQueueStatusUpdated() {
                Log.d("", "onQueueStatusUpdated: ");
            }

            @Override
            public void onPreloadStatusUpdated() {
                Log.d("", "onPreloadStatusUpdated: ");
            }

            @Override
            public void onSendingRemoteMediaRequest() {
                Log.d("", "onSendingRemoteMediaRequest: ");
            }

            @Override
            public void onAdBreakStatusUpdated() {
                Log.d("", "onAdBreakStatusUpdated: ");
            }
        };

【讨论】：

变量mIdleReason是多余的，你不需要它。