Jak sprawdzić, czy zestawy słuchawkowe bluetooth są podłączone do systemu Android?

Question

Jak sprawdzić, czy w danej chwili są podłączone do Androida urządzenia Bluetooth?

odczuwalna:

• Jeśli jest zestaw słuchawkowy conected, trasa dźwięku musi do tego zestawu

• Ale jeśli nie ma zbyt słuchawki, dźwięk musi pozostać na głośnik

• To musi sprawdzić podczas aplikacji, ponieważ jeśli bateria zestawu słuchawkowego zgaśnie, musi wysłać dźwięk do głośnika z powrotem

Rozwiązanie poniżej/

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 to odpowiedź tak, że dalsze komentarze mogą wykonany. Działa świetnie!

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()); 
     } 
    } 
}