android-setOnCompletionListener方法未在我的媒体播放器中调用

我正在使用Kotlin开发音乐播放器应用.我在MainActivity中定义了一个mediaPlayer对象,并在SongPlayingFragments中使用它.
我遇到的问题是下一首歌曲会自动播放.
我试图找出问题所在,发现我的onCompletionListener无法正常工作,或者说没有被调用.
我自己无法解决问题,因此正在寻找任何解决方案或任何其他方式来自动更改我的歌曲.

    override fun onActivityCreated(savedInstanceState: Bundle?) {
    super.onActivityCreated(savedInstanceState)
    CurrentSongHelper.isPlaying=true
    CurrentSongHelper.isShuffle= false
    CurrentSongHelper.isLoop = false
    var path: String ?= null
    var _songArtist: String ?= null
    var _songTitle: String ?= null
    var songId: Long = 0
    try {
        path = arguments?.getString("path")
        _songArtist = arguments?.getString("SongArtist")
        _songTitle = arguments?.getString("SongTitle")
        songId = arguments?.getInt("SongId")!!.toLong()
        currentPosition = arguments!!.getInt("SongPosition")
        fetchSongs = arguments?.getParcelableArrayList("SongData")

        CurrentSongHelper.songPath=path
        CurrentSongHelper.songArtist= _songArtist
        CurrentSongHelper.songTitle= _songTitle
        CurrentSongHelper.songId= songId
        CurrentSongHelper.currentPosition= currentPosition

        updateTextViews(CurrentSongHelper?.songTitle as String,CurrentSongHelper?.songArtist as String)
    }catch (e: Exception){
        e.printstacktrace()
    }
    //processinformation(mediaPlayer as MediaPlayer)
    mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC)
    try {
        mediaPlayer.setDataSource(myActivity as Context,Uri.parse(path))
        mediaPlayer.prepare()
        mediaPlayer.start()
    }catch (e: Exception){
        e.printstacktrace()
    }
    processinformation(mediaPlayer)
    if(CurrentSongHelper.isPlaying ){
        playPauseImageButton?.setBackgroundResource(R.drawable.pause_icon)
    }else{
        playPauseImageButton?.setBackgroundResource(R.drawable.play_icon )
    }

    mediaPlayer.setonCompletionListener {
        Toast.makeText(context,"Changing Song",Toast.LENGTH_LONG).show()
        onSongComplete()
    }
    clickHandler()
    audioVisualization?.linkTo(mediaPlayer)
}

onSongComplete()函数应该更改我的歌曲.
Toast的“ Changing song”并没有消失,因此我认为无论出现什么问题,它都会导致我的Listener无法被调用.

有什么建议么？

最佳答案

更换

mediaPlayer.setonCompletionListener {
        Toast.makeText(context,Toast.LENGTH_LONG).show()
        onSongComplete()
    }

与

mediaPlayer.setonCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                Toast.makeText(context,Toast.LENGTH_LONG).show()
        onSongComplete()
            }
        });