如何从话筒直接在Android上播放声音音箱？

问题描述

在我的应用程序，我需要从话筒直接到扬声器的直接声音。没有其他动作。我找到了一种方法通过播放文件，并设置扬声器关直接从话筒听筒声音。所以我想音箱同样可以正常工作。但是我不知道如何摆脱正在播放的文件的事情。谢谢你。

 扬声器（）{
    m_audioManager =（AudioManager）getSystemService（Context.AUDIO_SERVICE）;
    m_audioManager.setSpeakerphoneOn（真正的）; //没有必要，我认为
    //m_audioManager.setRouting(AudioManager.MODE_NORMAL，AudioManager.ROUTE_EARPIECE，AudioManager.ROUTE_ALL）;听筒需要这个？
    setVolumeControlStream（AudioManager.STREAM_VOICE_CALL）;
    m_audioManager.setMode（AudioManager.MODE_IN_CALL）;
 

解决方案

使用AudioRecord和放大器; AudioTrack记录和放大器;玩（改变，如果扬声器需要..._音乐

 静态最终诠释BUFFERSIZE = 200000;
最终短[]缓冲区=新的短[BUFFERSIZE]
短[] readBuffer =新的短[BUFFERSIZE]
公共无效的run（）{
     isRecording = TRUE;
     android.os.Process.setThreadPriority（android.os.Process.THREAD_PRIORITY_URGENT_AUDIO）;
     INT缓冲区大小= AudioRecord.getMinBufferSize（11025，AudioFormat.CHANNEL_CONFIGURATION_MONO，AudioFormat.ENCODING_PCM_16BIT）;
     AREC =新AudioRecord（MediaRecorder.AudioSource.MIC，11025，AudioFormat.CHANNEL_CONFIGURATION_MONO，AudioFormat.ENCODING_PCM_16BIT，缓冲区大小）;
     atrack =新AudioTrack（AudioManager.STREAM_VOICE_CALL，11025，AudioFormat.CHANNEL_CONFIGURATION_MONO，AudioFormat.ENCODING_PCM_16BIT，缓冲区大小，AudioTrack.MODE_STREAM）;
     atrack.setPlaybackRate（11025）;
     byte []的缓冲区=新的字节[缓冲区大小]
     arec.startRecording（）;
     atrack.play（）;
           而（isRecording）{
               arec.read（缓冲液，0，缓冲区大小）;
               atrack.write（缓冲液，0，buffer.length）;
               }
     }
 

in my application, I need to direct sound from microphone directly to speaker. No other actions.I found a way to direct sound from microphone to earpiece by playing a file and setting speaker off. So I guess speaker can work similarly. However I don' know how to get rid of the playing file thing. Thank you.

speaker() {
    m_audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
    m_audioManager.setSpeakerphoneOn(true);  // not needed I think
    //m_audioManager.setRouting(AudioManager.MODE_NORMAL, AudioManager.ROUTE_EARPIECE, AudioManager.ROUTE_ALL); earpiece need this?
    setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);
    m_audioManager.setMode(AudioManager.MODE_IN_CALL);

解决方案

use AudioRecord & AudioTrack to record & play (change to ..._MUSIC if speaker needed

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);
     arec = new AudioRecord(MediaRecorder.AudioSource.MIC, 11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, buffersize);
     atrack = new AudioTrack(AudioManager.STREAM_VOICE_CALL, 11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, buffersize, AudioTrack.MODE_STREAM);
     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);
               }
     }

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