How to record sound using bluetooth headset

Question

I am writing an android app for storing and managing voice memos with some basic metadata and tagging. When recording sound I use:

recorder = new MediaRecorder();         
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(currentRecordingFileName);
// and so on

This works well when using the phone in a normal fashion. However, it does not detect the presence of a bluetooth headset and still uses the phone's own microphone even when the headset is plugged in.

I also tried using MediaRecorder.AudioSource.DEFAULT, hoping it would automatically choose the correct source, but then no sound was recorded at all.

How can I a) detect if a bluetooth headset is plugged in and/or b) use a bluetooth headset as audio source for the media recorder?

Answer 1

You can detect connected bluetooth devices like this:

Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
// If there are paired devices
if (pairedDevices.size() > 0) {
    // Loop through paired devices
    for (BluetoothDevice device : pairedDevices) {
        // Add the name and address to an array adapter to show in a ListView
        mArrayAdapter.add(device.getName() + "\n" + device.getAddress());
    }
}

However, I'm not sure how you make it record from the headset and not the regular MIC