Mediaplayer完美从互联网流，但不是从本地主机

Question

我有一个mediaplayer接收音频流。当我使用互联网流时，这一切都很完美。当我为了测试目的切换到我的mamp localhost url时。它给了我错误。

这是我的代码：

private void initMediaPlayer() { 
     mPlayer = new MediaPlayer(); 
     mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 
     startMP3(URL); 
    } 

    private void startMP3(String URL) { 
     if (intialStage) { 
      new Player().execute(URL); 
     } 
    } 

    class Player extends AsyncTask<String, Void, Boolean> { 

     @Override 
     protected Boolean doInBackground(String... params) { 
      Boolean prepared; 
      try { 
       Log.d(TAG, "MP3 URL: " + params[0]); 
       mPlayer.setDataSource(params[0]); 
       mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { 
        @Override 
        public void onCompletion(MediaPlayer mp) { 
         intialStage = true; 
         mPlayer.stop(); 
         mPlayer.reset(); 
         songPositionHandler.removeCallbacks(UpdateSongTime); 
        } 
       }); 

       mPlayer.prepare(); 
       prepared = true; 
      } catch (IllegalArgumentException e) { 
       prepared = false; 
       e.printStackTrace(); 
      } catch (SecurityException e) { 
       prepared = false; 
       e.printStackTrace(); 
      } catch (IllegalStateException e) { 
       prepared = false; 
       e.printStackTrace(); 
      } catch (IOException e) { 
       prepared = false; 
       e.printStackTrace(); 
      } 
      return prepared; 
     } 

     @Override 
     protected void onPostExecute(Boolean result) { 
      super.onPostExecute(result); 
      Log.d(TAG, "Prepared status:" + " " + result); 
      mPlayer.start(); 
      intialStage = false; 
      songPositionHandler = new Handler(); 
      songPositionHandler.postDelayed(UpdateSongTime, 1000); 
     } 
    } 

    private Runnable UpdateSongTime = new Runnable() { 
     public void run() { 
      Log.d(TAG, "Current sec in song: " + TimeUnit.MILLISECONDS.toSeconds(mPlayer.getCurrentPosition())); 
      songPositionHandler.postDelayed(this, 1000); 
     } 
    }; 

这是我的网址：

public static final String URL = "http://localhost:8888/test.mp3"; 

它给了我这个例外：

09-02 09:17:19.294 1835-1847/com.example.test E/MediaPlayer﹕ error (1, -2147483648) 
09-02 09:17:19.294 1835-1848/com.example.test W/System.err﹕ java.io.IOException: Prepare failed.: status=0x1 
09-02 09:17:19.294 1835-1848/com.example.test W/System.err﹕ at android.media.MediaPlayer.prepare(Native Method) 
09-02 09:17:19.294 1835-1848/com.example.test W/System.err﹕ at com.example.test.AudioWaveForm$Player.doInBackground(AudioWaveForm.java:122) 
09-02 09:17:19.294 1835-1848/com.example.test W/System.err﹕ at com.example.test.AudioWaveForm$Player.doInBackground(AudioWaveForm.java:104) 
09-02 09:17:19.294 1835-1848/com.example.test W/System.err﹕ at android.os.AsyncTask$2.call(AsyncTask.java:288) 
09-02 09:17:19.294 1835-1848/com.example.test W/System.err﹕ at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
09-02 09:17:19.294 1835-1848/com.example.test W/System.err﹕ at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) 
09-02 09:17:19.294 1835-1848/com.example.test W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
09-02 09:17:19.294 1835-1848/com.example.test W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
09-02 09:17:19.294 1835-1848/com.example.test W/System.err﹕ at java.lang.Thread.run(Thread.java:841) 

有人可以给我一个解释为什么它是与在线url一起工作，而不是与我的mamp？

Answer 1

localhost是你的android主机。如果您正在运行模拟器，请参阅本文：How to connect to my http://localhost web server from Android Emulator in Eclipse或者如果您使用的是Android设备，请指定您的PC的IP地址。