如何知道特定的蓝牙设备正在连接？

Question

我有一个应用程序在后台运行，需要知道何时连接了特定的蓝牙设备。 可以说我希望我的应用在背景上运行，并在设备连接到车载蓝牙时执行某些操作。 谢谢！

Answer 1

下面的代码给予其所连接

BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 

代码装置：

public void onCreate() { 
    ... 
    IntentFilter filter1 = new IntentFilter(BluetoothDevice.ACTION_ACL_CONNECTED); 
    IntentFilter filter2 = new IntentFilter(BluetoothDevice.ACTION_ACL_DISCONNECT_REQUESTED); 
    IntentFilter filter3 = new IntentFilter(BluetoothDevice.ACTION_ACL_DISCONNECTED); 
    this.registerReceiver(mReceiver, filter1); 
    this.registerReceiver(mReceiver, filter2); 
    this.registerReceiver(mReceiver, filter3); 
} 

//The BroadcastReceiver that listens for bluetooth broadcasts 
private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 
    @Override 
    public void onReceive(Context context, Intent intent) { 
     String action = intent.getAction(); 
     BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 

     if (BluetoothDevice.ACTION_FOUND.equals(action)) { 
      ... //Device found 
     } 
     else if (BluetoothAdapter.ACTION_ACL_CONNECTED.equals(action)) { 
      ... //Device is now connected 
     } 
     else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) { 
      ... //Done searching 
     } 
     else if (BluetoothAdapter.ACTION_ACL_DISCONNECT_REQUESTED.equals(action)) { 
      ... //Device is about to disconnect 
     } 
     else if (BluetoothAdapter.ACTION_ACL_DISCONNECTED.equals(action)) { 
      ... //Device has disconnected 
     }   
    } 
};