在Android中录制来自蓝牙音频设备的音频 [英] Recording Audio from a Bluetooth Audio Device in Android

问题描述

如何从配对的蓝牙音频设备(即 Android中的Moster Clarity蓝牙扬声器).

How can I record the voice from a paired Bluetooth audio device (i.e. Moster Clarity Bluetooth Speaker) in Android.

我已经在Android中与该设备配对，我想从该设备上的麦克风录制语音(而不是使用手机的内置麦克风).

I've paired with the device from within Android, and I'd like to record the voice from the microphone on the device (as opposed to using the phone's built-in microphone).

这是我用来录制的代码:

Here's the code I'm using for recording:

try {
    isRecording = true;

    recorder = new MediaRecorder();
    recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

    if (file == null) {
        File rootDir = Environment.getExternalStorageDirectory();
        file = File.createTempFile(PREFIX, EXTENSION, rootDir);
    }

    recorder.setOutputFile(file.getAbsolutePath());
    recorder.prepare();
    recorder.start();

    timDown = new RecordCountDown(10000, 1000);
    timDown.start();

} catch (Exception e) {
    Log.i("Error Message", "Error Message :" + e.getMessage());
}

我该怎么做?

推荐答案

尝试使用此代码可能对您有所帮助.

Try this code maybe helpful for you..

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

registerReceiver(new BroadcastReceiver() {

@Override
public void onReceive(Context context, Intent intent) {
    int state = intent.getIntExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, -1);
    Log.d(TAG, "Audio SCO state: " + state);

    if (AudioManager.SCO_AUDIO_STATE_CONNECTED == state) { 
        /* 
         * Now the connection has been established to the bluetooth device. 
         * Record audio or whatever (on another thread).With AudioRecord you can          record   with an object created like this:
         * new AudioRecord(MediaRecorder.AudioSource.MIC, 8000, AudioFormat.CHANNEL_CONFIGURATION_MONO,
         * AudioFormat.ENCODING_PCM_16BIT, audioBufferSize);
         *
         * After finishing, don't forget to unregister this receiver and
         * to stop the bluetooth connection with am.stopBluetoothSco();
         */
        unregisterReceiver(this);
    }

    }
}, new IntentFilter(AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED));

Log.d(TAG, "starting bluetooth");
am.startBluetoothSco();

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