java - Android - 媒体播放器错误 : attachnewplayer called in state 64

Question

我正在按照下面的帖子创建简单的音乐播放器，但是从列表中选择任何歌曲或从 MediaController 中按上一个/下一个都会出现以下错误。我正在使用奥利奥(Andoid 8.1.0 API 27)。

public void playSong()
{
Song playSong = songs.get(songPosn);
songTitle=playSong.getTitle();
long currSong = playSong.getID();
Uri trackUri = ContentUris.withAppendedId(android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,currSong);
try
{        
    player.setDataSource(getApplicationContext(), trackUri);
    player.prepareAsync();
}
catch(Exception e){
    Log.e("MUSIC SERVICE", "Error setting data source", e);
}

错误 MediaPlayer 错误:在状态 64 中调用了 attachnewplayer

引用:Create Simple Music Player

Answer 1

您必须重置播放器，还必须设置 setAudioStreamType，因此您的代码如下所示

try 
{
    player.reset();
    player.setDataSource(getApplicationContext(), trackUri);
    player.setAudioStreamType(AudioManager.STREAM_MUSIC);
    player.prepareAsync();
}