连接时如何自动连接蓝牙设备

Question

im试图自动连接以共享首选项保存的特定蓝牙设备。在我的情况下，如果蓝牙连接丢失，那么我将尝试每5秒连接一次相同的设备，如果发现它，那么我想自动连接

// Create a BroadcastReceiver for bluetooth related checks
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();

        //We don't want to reconnect to already connected device
            // When discovery finds a device
            if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                // Get the BluetoothDevice object from the Intent
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

                // Check if the found device is one we had comm with
                if(!getSharedPreferencesData("address","").equals(""))
                {
                    String address = getSharedPreferencesData("address","");
                    if(device.getAddress().equals(address)==true)
                    chatController.connect(address);
                    //sendMessage("00000000");
                }
            }

        if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {

                    Log.e("BT:","Connected");
            sendMessage("*00000000000000#");
        }else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)) {
            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                        bluetoothAdapter.startDiscovery();
                }
            }, 5000);
        }
    }
};

我已经尝试过这段代码，但是对我来说却不起作用