IllegalStateException异常的MediaPlayer.prepareAsync

05-19 11:52:51.622: ERROR/MediaPlayer(1291): prepareAsync called in state 8 
05-19 11:52:51.622: WARN/System.err(1291): java.lang.IllegalStateException

try { 
    mp = MediaPlayer.create(
      Main.this, 
      Uri.parse("http://codejanitor.us/good.mp3")); 
    mp.setOnPreparedListener(new OnPreparedListener() { 
     @Override 
     public void onPrepared(MediaPlayer mp) { 
      mp.start(); 
     } 
    }); 
    try { 
     mp.prepareAsync(); 
    } catch (IllegalStateException e) { 
     e.printStackTrace(); 
    } 
} finally { 
    if (mp != null) { 
     mp.release(); 
     mp = null; 
    } 
}

交替IllegalStateException异常的MediaPlayer.prepareAsync

如果我做的：

try { 
    mp = MediaPlayer.create(
      AmazonClipActivity.this, 
      Uri.parse("http://codejanitor.us/good.mp3")); 
    mp.setOnPreparedListener(new OnPreparedListener() { 
     @Override 
     public void onPrepared(MediaPlayer mp) { 
      mp.start(); 
     } 
    }); 
} finally { 
    if (mp != null) { 
     mp.release(); 
     mp = null; 
    } 
}

我得到：

05-19 12:22:57.472: DEBUG/MediaPlayer(1635): Couldn't open file on client side, trying server side 
05-19 12:22:57.472: INFO/StagefrightPlayer(68): setDataSource('http://codejanitor.us/good.mp3') 
05-19 12:22:57.482: INFO/NuHTTPDataSource(68): connect to codejanitor.us:80/good.mp3 @0 
05-19 12:23:00.632: INFO/NuCachedSource2(68): ERROR_END_OF_STREAM

来源

2011-05-19 hunterp

mp = MediaPlayer.create(...);已经准备好返回MediaPlayer，因此不能再调用prepare（或其变体）（并且也不需要onPreparedListener）。

来源

2011-05-19 16:20:38 MByD

我更新了我的问题，并且代码路径也失败了，希望您的输入 – hunterp 2011-05-19 16:25:40

请参阅此链接：http：// code .google.com/p/cyanogenmod/issues/detail？id = 1023 – MByD 2011-05-19 17:01:45

@BinyaminSharet您的链接已损坏。 – 2013-06-06 15:15:27

“在状态8中调用prepareAsync”意味着Mediaplayer已经准备好。

你在代码中调用mp.prepare();？

来源

2011-05-19 16:18:41 Jorgesys

我更新了我的问题，其代码路径也失败了，希望能够输入 – hunterp 2011-05-19 16:25:22

你更新的问题：

检查你是否在你的AndroidManifest.xml
检查Internet的权限，你是否有一些数据连接启用，只要你想从互联网上
你是什么意思串流“这个解决方案也失败了”？它是否会抛出IllegalStateException？从我看到的情况来看，它根本不会做任何事情，因为在MediaPlayer对象准备好之后注册OnPreparedListener，导致永远不会调用onPrepared()方法。

一个更好的方法是写：

MediaPlayer mp = new MediaPlayer(); 
mp.setDataSource("http://.../movie.mp4"); 
mp.setOnPreparedListener(this); 
mp.prepareAsync();

来源

2012-01-25 15:27:34 Timmos

我用下面的代码来播放声音文件HTTP。

BackgroundSound mBackgroundSound = new BackgroundSound(); 

public void onSoundRequested(final Uri uri) { 
    mBackgroundSound = new BackgroundSound(); 
    mBackgroundSound.execute(new SoundModel(dicId, uri)); 
} 

public class BackgroundSound extends AsyncTask<SoundModel, Void, Void> { 
    MediaPlayer mediaPlayer; 

    @Override 
    protected Void doInBackground(SoundModel... params) { 
     SoundModel model = params[0]; 
     final Uri uri = model.getUri(); 

     if (uri == null || uri == Uri.EMPTY) return null; 
     if (mediaPlayer != null) mediaPlayer.stop(); 

     try { 
      mediaPlayer = MediaPlayer.create(VocabularyActivity.this, uri); 
      mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 
     } catch (Exception e) { 
      // do nothing. 
     } 
     if (mediaPlayer == null) return null; 

     mediaPlayer.setVolume(1.0f, 1.0f); 
     mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { 
      @Override 
      public void onCompletion(MediaPlayer mp) { 
       mediaPlayer.reset(); 
       mediaPlayer.release(); 
       mediaPlayer = null; 
      } 
     }); 
     mediaPlayer.start(); 
     return null; 
    } 
}

它显示warnimg W/MediaPlayer: Couldn't open https://something.com/test.mp3: java.io.FileNotFoundException: No content provider: https://something.com/test.mp3但工作正常。

来源

2016-12-07 05:35:42 Youngjae

IllegalStateException异常的MediaPlayer.prepareAsync

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