问Android -在智能手机和蓝牙模块之间路由音频的功能

EN

boolean isRecording=true;
int buffersize = 8000;
byte[] buffer = new byte[buffersize];

//audio configuration and SCO Bluetooth connection. 
AudioManager aManager = (AudioManager) getSystemService(AUDIO_SERVICE);
android.os.Process.setThreadPriority(
            android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
aManager.startBluetoothSco();
aManager.setBluetoothScoOn(true);
aManager.setMode(AudioManager.MODE_IN_COMMUNICATION);

//AudioRecord configuation for recording audio from babyphone.
AudioRecord  arec = new AudioRecord(
            MediaRecorder.AudioSource.VOICE_COMMUNICATION,
            8000,
            AudioFormat.CHANNEL_IN_MONO,
            AudioFormat.ENCODING_PCM_16BIT,
            buffersize); 

//AudioTrack configuation for sending audio to smartphone speaker.                
AudioTrack  atrack = new AudioTrack(AudioManager.STREAM_VOICE_CALL,
                8000,
                AudioFormat.CHANNEL_OUT_MONO,
                AudioFormat.ENCODING_PCM_16BIT,
                buffersize,
                AudioTrack.MODE_STREAM);

atrack.setPlaybackRate(8000);

//start audio recording and playing.
arec.startRecording();
atrack.play();

while(isRecording) {
    arec.read(buffer, 0, buffersize);

    atrack.write(buffer, 0, buffer.length);
}

arec.stop();
atrack.stop()