android中的多个媒体播放器实例

时间:2015-05-22 08:02:15

标签: android media-player multiple-instances

我在Android中使用MediaPlayer。我有来自服务器的歌曲名称和URL的所有列表。当我点击任何项目时,在MediaPlayer中播放来自服务器的歌曲。这是我点击" Listview"播放歌曲的代码。项目

    txtEndTimingForMediaPlayer.setText("");
    txtStarTimingForMediaPlayer.setText("");
    seekBarPlayer.setProgress(0);
 // this code is for stop current playing song and release media player
    if(mediaPlayer!=null && mediaPlayer.isPlaying()){
        mediaPlayer.stop();
        mediaPlayer.reset();
        mediaPlayer.release();
        mediaPlayer=null;
    }

    // start new song for play
    mediaPlayer=new MediaPlayer();
    Uri myUri1 = Uri.parse(url);

    mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    try {
        mediaPlayer.reset();
        mediaPlayer.setDataSource(getActivity(), myUri1);
        mediaPlayer.prepareAsync();

        mediaPlayer.setOnPreparedListener(new OnPreparedListener() {

            @Override
            public void onPrepared(MediaPlayer player) {
                playPause=true;
                player.start();
                mediaFileLengthInMilliseconds = player.getDuration(); 
            }
        });

        mediaPlayer.setOnCompletionListener(new OnCompletionListener() {

            @Override
            public void onCompletion(MediaPlayer mp) {
                playPause=false;
                btnPlayPause.setBackgroundResource(R.drawable.icon_play);                   
            }
        });
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (SecurityException e) {
        e.printStackTrace();
    } catch (IllegalStateException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }  

现在这个代码的问题是我连续点击歌曲,然后同一首歌多次播放。如何避免这种多实例问题。

1 个答案:

答案 0 :(得分:1)

我认为当您点击太快而无法播放相同的歌曲时,if(mediaPlayer!=null && mediaPlayer.isPlaying())不是真的,然后mediaPlayer=new MediaPlayer();正在创建新的实例和播放歌曲,这将导致多次听到同一首歌曲。调试并检查代码是否输入if (condition)