Recording with BluetoothHeadset Mic - android-studio

Question

Hei there,
I m trying to make an App with Android-Studio that can record sound using a Bluetooth-HS.
I know there are a lot of posts close to this, but i tried all the answers and it wont work for me.
My code gives me back a filled bytebuffer, however testing proves, its always the Phones Mic not the Headset-Mic.
If anyone could take a look at my code and point out why it wont use the BT-HS, that would be a huge help for me.
public class Inhalation extends AppCompatActivity {
AudioManager audioManager;
AudioRecord audioRecord=null;
Button mrecord;
Button mpause;
boolean isRecording=false;
private Thread recordingThread = null;
private int bufferSize = AudioRecord.getMinBufferSize(8000,AudioFormat.CHANNEL_IN_MONO,AudioFormat.ENCODING_PCM_16BIT);
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_inhalation);
mrecord= findViewById(R.id.Button_Record_ID);
mpause=findViewById(R.id.Button_Pause_ID);
audioManager =(AudioManager) this.getSystemService(this.AUDIO_SERVICE);
}
//is supposed to start recording using the BT MIC. Can only be called if BTSCO is connected
private void startRecording() {
audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, 8000, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);
audioRecord.startRecording();
isRecording = true;
recordingThread = new Thread(new Runnable() {
public void run() {
writeAudioDataToFile();
}
}, "AudioRecorder Thread");
recordingThread.start();
}
//picks up the recorded audiobuffer and writes it into a file
private void writeAudioDataToFile() {
String filename="record";
byte saudioBuffer[] = new byte[bufferSize];
FileOutputStream os = null;
// TODO (4) Audiorecord Filecreation
try {
os = openFileOutput(filename, Context.MODE_PRIVATE);
} catch (FileNotFoundException e) {
e.printStackTrace();
Log.d("headset_rec","false filepath");
}
while (isRecording) {
audioRecord.read(saudioBuffer, 0, bufferSize);
try {
os.write(saudioBuffer, 0, bufferSize);
// os.write(saudioBuffer);
Log.d("headset_rec","writing"+saudioBuffer[0]);
} catch (IOException e) {
e.printStackTrace();
Log.d("headset_rec","writefail");
}
}
try {
os.close();
} catch (IOException e) {
Log.d("headset_rec","close");
e.printStackTrace();
}
}
//stops the recording
private void stopRecording() {
// stops the recording activity
if (null != audioRecord) {
isRecording = false;
audioRecord.stop();
audioRecord.release();
audioRecord = null;
recordingThread = null;
}
}
public void Record_On_Click(View view){
mpause.setEnabled(true);
mrecord.setEnabled(false);
requestRecordAudioPermission();
startRecording();
}
//Button to pause
public void Record_Pause_Click(View view){
stopRecording();
// readFromFile();
mrecord.setEnabled(true);
mpause.setEnabled(false);
}
//if BluetoothSCO is connected enables recording
private BroadcastReceiver mBluetoothScoReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
int state = intent.getIntExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, -1);
System.out.println("ANDROID Audio SCO state: " + state);
if (AudioManager.SCO_AUDIO_STATE_CONNECTED == state) {
Log.d("SCOO","connected");
mrecord.setEnabled(true);
}
if(AudioManager.SCO_AUDIO_STATE_DISCONNECTED==state){
Log.d("SCOO","disconnected");
mrecord.setEnabled(false);
}
}
};
//connects to the bluetoothHeadset doing the following:
#Override
protected void onResume() {
// TODO (5) Bluetooth Mik
// Start Bluetooth SCO.
if(isRecording){
mpause.setEnabled(true);
mrecord.setEnabled(false);
}
IntentFilter intentFilter = new IntentFilter(AudioManager.ACTION_SCO_AUDIO_STATE_UPDATED);
registerReceiver(mBluetoothScoReceiver, intentFilter);
audioManager.setMode(audioManager.MODE_NORMAL);
audioManager.setBluetoothScoOn(true);
audioManager.startBluetoothSco();
// Stop Speaker.
audioManager.setSpeakerphoneOn(false);
super.onResume();
}
//Disconnects from the Bluetoothheadset doing the following
#Override
protected void onDestroy() {
audioManager.stopBluetoothSco();
audioManager.setMode(audioManager.MODE_NORMAL);
audioManager.setBluetoothScoOn(false);
// Start Speaker.
audioManager.setSpeakerphoneOn(true);
unregisterReceiver(mBluetoothScoReceiver);
super.onDestroy();
}
private void requestRecordAudioPermission() {//gets the permission to record audio
//check API version, do nothing if API version < 23!
int currentapiVersion = android.os.Build.VERSION.SDK_INT;
if (currentapiVersion > android.os.Build.VERSION_CODES.LOLLIPOP){
if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
Log.d("Activity_Request", "Wastn granted!");
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.RECORD_AUDIO)) {
Log.d("Activity_Request", "request!");
// Show an expanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
} else {
// No explanation needed, we can request the permission.
Log.d("Activity_Request", "take!");
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO}, 1);
}
}
}
}