Android - 通过听筒播放音频 [英] Android - Getting audio to play through earpiece

问题描述

我目前的代码使用 AudioRecord 类从设备麦克风读取录音，然后使用 AudioTrack 类将其回放.

I currently have code that reads a recording in from the devices mic using the AudioRecord class and then playing it back out using the AudioTrack class.

我的问题是，当我播放它时，它会通过免提电话播放.

My problem is that when I play it out it plays via the speaker phone.

我希望它通过设备上的耳机播放.

I want it to play out via the ear piece on the device.

这是我的代码:

public class LoopProg extends Activity {

 boolean isRecording; //currently not used
 AudioManager am;
 int count = 0;

 /** Called when the activity is first created. */
 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
        am.setMicrophoneMute(true);
        while(count <= 1000000){
        Record record = new Record();  
        record.run();
        count ++;
        Log.d("COUNT", "Count is : " + count);
        }
    } 

   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_MUSIC, 11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, buffersize, AudioTrack.MODE_STREAM);
      am.setRouting(AudioManager.MODE_NORMAL,1, AudioManager.STREAM_MUSIC);
      int ok = am.getRouting(AudioManager.ROUTE_EARPIECE);
      Log.d("ROUTING", "getRouting = " + ok);
      setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);
      //am.setSpeakerphoneOn(true);
      Log.d("SPEAKERPHONE", "Is speakerphone on? : " + am.isSpeakerphoneOn());
      am.setSpeakerphoneOn(false);
      Log.d("SPEAKERPHONE", "Is speakerphone on? : " + am.isSpeakerphoneOn());
      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;
      }
   } 
}

如您所见，我尝试使用 AudioManager 类及其方法(包括已弃用的 setRouting 方法)的代码是否有效，但 setSpeakerphoneOn 方法似乎根本没有效果，路由方法也没有.

As you can see if the code I have tried using the AudioManager class and its methods including the deprecated setRouting method and nothing works, the setSpeakerphoneOn method seems to have no effect at all, neither does the routing method.

有没有人知道如何通过听筒而不是免提电话播放它?

Has anyone got any ideas on how to get it to play via the earpiece instead of the spaker phone?

推荐答案

刚刚让它在 2.2 上工作.我仍然需要我不太喜欢的 In_Call 设置，但我现在会处理它.我能够放弃现在已弃用的呼叫路由内容.我发现你肯定需要 Modify_Audio_Settings 权限，没有它就没有错误，但 setSpeakerPhone 方法什么都不做.这是我使用的代码的模型.

Just got it to work on 2.2. I still needed the In_Call setup which I don't really like but I'll deal with it for now. I was able to ditch the call routing stuff which is deprecated now. I found you definitely need the Modify_Audio_Settings permission, no error without it but it the setSpeakerPhone method just does nothing. Here is the mock up of the code I used.

private AudioManager m_amAudioManager;  
m_amAudioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);  
m_amAudioManager.setMode(AudioManager.MODE_IN_CALL); 
m_amAudioManager.setSpeakerphoneOn(false); 

这篇关于Android - 通过听筒播放音频的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！