How to Verify whether bluetooth headsets are connected on Android?

Question

How to verify if there is any bluetooth headsets conected to android at the moment?

Like:

• If there is a headset conected, the sound must route to this headset

• But if there isnt a headset, the sound must stay on speaker

• This must check during the application because if the battery of the headset goes off it must send sound to speaker back

Solution below /

public class BluetoothReceiver extends BroadcastReceiver {     private AudioManager localAudioManager;     private static final int STATE_DISCONNECTED  = 0x00000000;     private static final String EXTRA_STATE = "android.bluetooth.headset.extra.STATE";     private static final String TAG = "BluetoothReceiver";     private static final String ACTION_BT_HEADSET_STATE_CHANGED  = "android.bluetooth.headset.action.STATE_CHANGED";     private static final String ACTION_BT_HEADSET_FORCE_ON = "android.bluetooth.headset.action.FORCE_ON";     private static final String ACTION_BT_HEADSET_FORCE_OFF = "android.bluetooth.headset.action.FORCE_OFF";      @Override     public void onReceive(final Context context, final Intent intent) {         Log.i(TAG,"onReceive - BluetoothBroadcast");         localAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);         final String action = intent.getAction();         if (action.equals(ACTION_BT_HEADSET_STATE_CHANGED)) {             final int extraData = intent.getIntExtra(EXTRA_STATE, STATE_DISCONNECTED);             if (extraData == STATE_DISCONNECTED) {                 localAudioManager.setBluetoothScoOn(false);                 localAudioManager.stopBluetoothSco();                 localAudioManager.setMode(AudioManager.MODE_NORMAL);                 Log.i(TAG, "Bluetooth Headset Off " + localAudioManager.getMode());                 Log.i(TAG, "A2DP: " + localAudioManager.isBluetoothA2dpOn() + ". SCO: " + localAudioManager.isBluetoothScoAvailableOffCall());             } else {                             localAudioManager.setMode(0);                 localAudioManager.setBluetoothScoOn(true);                 localAudioManager.startBluetoothSco();                 localAudioManager.setMode(AudioManager.MODE_IN_CALL);                 Log.i(TAG, "Bluetooth Headset On " + localAudioManager.getMode());                 Log.i(TAG, "A2DP: " + localAudioManager.isBluetoothA2dpOn() + ". SCO: " + localAudioManager.isBluetoothScoAvailableOffCall());             }         }             if (action.equals(ACTION_BT_HEADSET_FORCE_ON)) {             localAudioManager.setMode(0);             localAudioManager.setBluetoothScoOn(true);             localAudioManager.startBluetoothSco();             localAudioManager.setMode(AudioManager.MODE_IN_CALL);             Log.i(TAG, "Bluetooth Headset On " + localAudioManager.getMode());             Log.i(TAG, "A2DP: " + localAudioManager.isBluetoothA2dpOn() + ". SCO: " + localAudioManager.isBluetoothScoAvailableOffCall());         }          if (action.equals(ACTION_BT_HEADSET_FORCE_OFF)) {             localAudioManager.setBluetoothScoOn(false);             localAudioManager.stopBluetoothSco();             localAudioManager.setMode(AudioManager.MODE_NORMAL);             Log.i(TAG, "Bluetooth Headset Off " + localAudioManager.getMode());             Log.i(TAG, "A2DP: " + localAudioManager.isBluetoothA2dpOn() + ". SCO: " + localAudioManager.isBluetoothScoAvailableOffCall());         }     } } 

Answer 1

Moving this to an answer so that further comments can made. Works great!

public class BluetoothReceiver extends BroadcastReceiver {     private AudioManager localAudioManager;     private static final int STATE_DISCONNECTED  = 0x00000000;     private static final String EXTRA_STATE = "android.bluetooth.headset.extra.STATE";     private static final String TAG = "BluetoothReceiver";     private static final String ACTION_BT_HEADSET_STATE_CHANGED  = "android.bluetooth.headset.action.STATE_CHANGED";     private static final String ACTION_BT_HEADSET_FORCE_ON = "android.bluetooth.headset.action.FORCE_ON";     private static final String ACTION_BT_HEADSET_FORCE_OFF = "android.bluetooth.headset.action.FORCE_OFF";      @Override     public void onReceive(final Context context, final Intent intent) {         Log.i(TAG,"onReceive - BluetoothBroadcast");         localAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);         final String action = intent.getAction();         if (action.equals(ACTION_BT_HEADSET_STATE_CHANGED)) {             final int extraData = intent.getIntExtra(EXTRA_STATE, STATE_DISCONNECTED);             if (extraData == STATE_DISCONNECTED) {                 localAudioManager.setBluetoothScoOn(false);                 localAudioManager.stopBluetoothSco();                 localAudioManager.setMode(AudioManager.MODE_NORMAL);                 Log.i(TAG, "Bluetooth Headset Off " + localAudioManager.getMode());                 Log.i(TAG, "A2DP: " + localAudioManager.isBluetoothA2dpOn() + ". SCO: " + localAudioManager.isBluetoothScoAvailableOffCall());             } else {                             localAudioManager.setMode(0);                 localAudioManager.setBluetoothScoOn(true);                 localAudioManager.startBluetoothSco();                 localAudioManager.setMode(AudioManager.MODE_IN_CALL);                 Log.i(TAG, "Bluetooth Headset On " + localAudioManager.getMode());                 Log.i(TAG, "A2DP: " + localAudioManager.isBluetoothA2dpOn() + ". SCO: " + localAudioManager.isBluetoothScoAvailableOffCall());             }         }             if (action.equals(ACTION_BT_HEADSET_FORCE_ON)) {             localAudioManager.setMode(0);             localAudioManager.setBluetoothScoOn(true);             localAudioManager.startBluetoothSco();             localAudioManager.setMode(AudioManager.MODE_IN_CALL);             Log.i(TAG, "Bluetooth Headset On " + localAudioManager.getMode());             Log.i(TAG, "A2DP: " + localAudioManager.isBluetoothA2dpOn() + ". SCO: " + localAudioManager.isBluetoothScoAvailableOffCall());         }          if (action.equals(ACTION_BT_HEADSET_FORCE_OFF)) {             localAudioManager.setBluetoothScoOn(false);             localAudioManager.stopBluetoothSco();             localAudioManager.setMode(AudioManager.MODE_NORMAL);             Log.i(TAG, "Bluetooth Headset Off " + localAudioManager.getMode());             Log.i(TAG, "A2DP: " + localAudioManager.isBluetoothA2dpOn() + ". SCO: " + localAudioManager.isBluetoothScoAvailableOffCall());         }     } }