Android - 如何正确执行后台线程？

想知道是否有人可以帮助我在Android上的后台线程。Android - 如何正确执行后台线程？

我有一段代码从设备的麦克风记录下来，然后通过耳塞（1.5）播放它录制的内容。

我想在一个线程中运行它，但一直没有成功让它作为后台线程运行。

目前它运行并锁定活动，以便发生的所有事情是线程正在运行并且UI被锁定或似乎挂起。

这里是我试图做的最新的办法：我想知道是否有人可以指导我如何把它变成一个后台线程

public class LoopProg extends Activity { 


boolean isRecording; //currently not used 

    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    AudioManager audio_service = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 

    audio_service.setSpeakerphoneOn(false); 
    audio_service.setMode(AudioManager.MODE_IN_CALL); 
    audio_service.setRouting(AudioManager.MODE_NORMAL, 
    AudioManager.ROUTE_EARPIECE, AudioManager.ROUTE_ALL); 

    Record record = new Record(); 
    record.run(); 

} 

    public class Record extends Thread 
    { 


      static final int bufferSize = 200000; 
      final short[] buffer = new short[bufferSize]; 
      short[] readBuffer = new short[bufferSize]; 

      public void run() { 
      isRecording = true; 
      android.os.Process.setThreadPriority 
      (android.os.Process.THREAD_PRIORITY_URGENT_AUDIO); 

      int buffersize = AudioRecord.getMinBufferSize(11025, 
      AudioFormat.CHANNEL_CONFIGURATION_MONO, 
      AudioFormat.ENCODING_PCM_16BIT); 

          AudioRecord arec = new AudioRecord(MediaRecorder.AudioSource.MIC, 
              11025, 
              AudioFormat.CHANNEL_CONFIGURATION_MONO, 
              AudioFormat.ENCODING_PCM_16BIT, 
              buffersize); 

          AudioTrack atrack = new AudioTrack(AudioManager.STREAM_VOICE_CALL, 
              11025, 
              AudioFormat.CHANNEL_CONFIGURATION_MONO, 
              AudioFormat.ENCODING_PCM_16BIT, 
              buffersize, 
              AudioTrack.MODE_STREAM); 

          setVolumeControlStream(AudioManager.STREAM_VOICE_CALL); 


          atrack.setPlaybackRate(11025); 

          byte[] buffer = new byte[buffersize]; 
          arec.startRecording(); 
          atrack.play(); 

          while(isRecording) { 
            arec.read(buffer, 0, buffersize); 
            atrack.write(buffer, 0, buffer.length); 
          } 

          arec.stop(); 
          atrack.stop(); 
          isRecording = false; 
       } 
     } 
}

？或者可能会指点我一些可能相关的教程，我可能错过了？提前

来源

2010-01-25 Donal Rafferty