如何在Xamarin.Form中使用或实现广播接收器

// 创建广播接收器类
public class MyBroadcastReceiver : BroadcastReceiver
{
    public override void OnReceive(Context context, Intent intent)
    {
        // 处理接收到的广播消息
        // 可以在这里更新UI或执行其他操作
    }
}

// 注册广播接收器
[Activity(Label = "MyApp", MainLauncher = true)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);

        // 注册广播接收器
        var receiver = new MyBroadcastReceiver();
        RegisterReceiver(receiver, new IntentFilter("com.example.MY_ACTION"));

        global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
        LoadApplication(new App());
    }
}

// 发送广播消息
public void SendBroadcastMessage()
{
    var intent = new Intent("com.example.MY_ACTION");
    SendBroadcast(intent);
}