java - 蓝牙设备连接问题

Question

我正在开发一个 Android 应用程序，其中我正在检查两个设备是否通过蓝牙连接

我正在使用以下代码注册广播接收器。

    IntentFilter filter1 = new IntentFilter(BluetoothDevice.ACTION_ACL_CONNECTED);
    IntentFilter filter2 = new IntentFilter(BluetoothDevice.ACTION_ACL_DISCONNECTED);

    this.registerReceiver(mReceiver, filter1);
    this.registerReceiver(mReceiver, filter2);

广播接收器看起来像这样。

    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        // When discovery finds a device

        if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action))
        {   
            Log.e("bluetooth connected","bluetooth connected");
        }
        else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action))
        {
            Log.e("bluetooth not connected","bluetooth not connected");
        }    
    }
};

然而这不起作用。不确定我哪里出错了。请帮忙!谢谢!

Answer 1

您的 list 中有蓝牙权限吗？

<uses-permission android:name="android.permission.BLUETOOTH" />

您也可以这样做，而不是注册两次接收器并使用两个过滤器

IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
filter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);    

this.registerReceiver(mReceiver, filter);