如何让 exoplayer 从歌曲列表中播放媒体

如何解决如何让 exoplayer 从歌曲列表中播放媒体

我正在构建一个音乐播放器应用。

在那里，有各种细分：

1. 所有歌曲 - 来自用户设备的所有歌曲
2. 播放列表 - 用户添加到播放列表的所有歌曲
3. 收藏夹 - 用户添加为收藏/喜欢的歌曲
4. 艺人歌曲 - 艺人的所有歌曲

现在，我已经设置好了一切，我可以播放“所有”歌曲等......

我想要的

当用户在：

播放列表 - 仅播放该播放列表中的歌曲列表

收藏夹 - 仅播放收藏夹中的歌曲列表

艺人歌曲 - 仅播放艺人的歌曲列表

我有各个片段的歌曲列表

现在，我只能播放用户媒体中的所有歌曲......所以，队列来自设备中的所有歌曲......我不想要。

我对ALL SONGS Segment 没有任何问题...

示例

最喜欢的歌曲片段

private var allSongs: List<Songs>? = null
roomFavSongviewmodel.getAllFavSongs.observe(viewLifecycleOwner) { songs ->
allSongs = songs .....//Now I have a list of songs a user has marked as favorite...Is there a way I can add this as the queue for exoplayer to play only this list of songs,instead of all songs from media
}

favouriteSongsAdapter.setonItemClickListener {        
mainviewmodel.playOrToggleSong(it)..//On click of a song from the list of song        
    }

主视图模型

 class Mainviewmodel @viewmodelInject constructor(
 private val musicServiceConnection: MusicServiceConnection,) : viewmodel() {

 private val _mediaItems = mutablelivedata<Resource<List<Songs>>>()
 val mediaItems: LiveData<Resource<List<Songs>>> = _mediaItems

val isConnected = musicServiceConnection.isConnected
val networkError = musicServiceConnection.networkError
val currentlyPlayingSong = musicServiceConnection.currentPlayingSong
val playBackState = musicServiceConnection.playbackState


init {

    _mediaItems.postValue(Resource.loading(null))

        musicServiceConnection.subscribe(

            MEDIA_ROOT_ID,object : MediabrowserCompat.SubscriptionCallback() {

                override fun onChildrenLoaded(
                    parentId: String,children: MutableList<MediabrowserCompat.MediaItem>
                ) {
                    super.onChildrenLoaded(parentId,children)
                    val items = children.map {

                        val album = it.description.extras?.get("album")
                        val duration = it.description.extras?.get("duration")
                        val size = it.description.extras?.get("size")
                        val dateAdded = it.description.extras?.get("dateAdded")

                        Songs(
                            mediaId = it.mediaId?.toLong(),title = it.description.title as String?,subtitle = it.description.subtitle as String?,songUri = it.description.mediaUri,albumartUri = it.description.iconUri,duration = duration as Long?,album = album as String?,size = size as Long?,dateAdded = dateAdded as String?
                        )
                    }
                    _mediaItems.value = Resource.success(items)
                }
            })
}

fun skipToNextSong(){
    musicServiceConnection.transportControls.skipToNext()
}

fun setShuffle(){
    musicServiceConnection.transportControls.setShuffleMode(PlaybackStateCompat.SHUFFLE_MODE_ALL)
}

fun offShuffle(){
    musicServiceConnection.transportControls.setShuffleMode(PlaybackStateCompat.SHUFFLE_MODE_NONE)
}

fun setRepeat(){
    musicServiceConnection.transportControls.setRepeatMode(PlaybackStateCompat.REPEAT_MODE_ONE)
}

fun offRepeat(){
    musicServiceConnection.transportControls.setRepeatMode(PlaybackStateCompat.REPEAT_MODE_NONE)
}

fun skipToPrevIoUsSong(){
    musicServiceConnection.transportControls.skipToPrevIoUs()
}

fun seekTo(pos: Long){
    musicServiceConnection.transportControls.seekTo(pos)
}

fun playOrToggleSong(
    mediaItem: Songs,toggle: Boolean = false
){
    val isPrepared = playBackState.value?.isPrepared ?: false

    if (isPrepared && mediaItem.mediaId.toString() ==
        currentlyPlayingSong.value?.getString(MetaDATA_KEY_MEDIA_ID)){
        playBackState.value?.let { playbackState ->

            when{
                playbackState.isPlaying -> if (toggle) musicServiceConnection.transportControls.pause()
                playbackState.isPlayEnabled -> musicServiceConnection.transportControls.play()
                else -> Unit
            }
        }
    }
    else{
       musicServiceConnection.transportControls.playFromMediaId(
           mediaItem.mediaId.toString(),null
       )
    }

}

override fun onCleared() {
    super.onCleared()
    musicServiceConnection.unSubscribe(
        MEDIA_ROOT_ID,object : MediabrowserCompat.SubscriptionCallback() {
        })
 }
}

有没有办法告诉 exoplayer 从特定的歌曲列表中建立它的队列？？