Firebase通知单击意图在后台状态显示空-Xamarin.forms Android

在我的xamarin.forms应用程序中，我使用了Firebase推送通知。在android部分，我可以接收前台、后台和终止状态的通知。我面临的问题是，当我在后台状态或终止状态下点击通知时，我无法从

Intent

获取值；它显示null。这在早些时候就很有效了，我不知道我做错了什么。我可以在应用程序处于前台模式时获取通知值

我的FirebaseMessagingService

[Service]
[IntentFilter(new[] { "com.google.firebase.MESSAGING_EVENT" })]
public class MyFirebaseMessagingService : FirebaseMessagingService

{
    // private string TAG = "MyFirebaseMsgService";
    public static string EmployeeID = "";
    public static string StartDate = "";
    public static string NotificationType = "";
    public static string TotalHours = "";
    public static string EmployeeName = "";
    public static string EmployeeNumber = "";
    public override void OnMessageReceived(RemoteMessage message)
    {
        base.OnMessageReceived(message);
        try
        {
            SendNotification(message.GetNotification().Body, message.GetNotification().Title, message.Data);
            EmployeeID = message.Data["EmpID"].ToString();
            StartDate = message.Data["SDate"].ToString();
            NotificationType = message.Data["NotificationType"].ToString();
            TotalHours = message.Data["TotalHours"].ToString();
            EmployeeName = message.Data["EmployeeName"].ToString();
            EmployeeNumber = message.Data["EmpNo"].ToString();
        }

        catch (Exception ex)
        {
        }

    }
    private void SendNotification(string messageBody, string messageTitle, IDictionary<string, string> data)
    {

        var intent = new Intent(this, typeof(MainActivity));
        intent.PutExtra("user_notification_id", EmployeeID);

        intent.AddFlags(ActivityFlags.ClearTop);
        foreach (var key in data.Keys)
        {
            intent.PutExtra(key, data[key]);
        }
        var pendingIntent = PendingIntent.GetActivity(this, new Random().Next(), intent, PendingIntentFlags.OneShot);
        var notificationBuilder = new NotificationCompat.Builder(this, MainActivity.CHANNEL_ID).SetSmallIcon(Resource.Drawable.icon_logo).SetContentTitle(messageTitle).SetContentText(messageBody).SetAutoCancel(true).SetContentIntent(pendingIntent).SetVibrate(new long[] { 1000, 1000 }).SetSound(RingtoneManager.GetDefaultUri(RingtoneType.Notification)).SetStyle((new NotificationCompat.BigTextStyle().BigText(messageBody)));
        var notificationManager = NotificationManagerCompat.From(this); notificationManager.Notify(new Random().Next(), notificationBuilder.Build());

    }

}

---

首先，您需要在firebase负载中设置

“单击操作”：“打开活动1”

然后用

IntentFilterAttribute

[IntentFilter(new[] { "OPEN_ACTIVITY_1" }, Categories = new[] { "android.intent.category.DEFAULT" })]

如果没有单击操作，您的通知将不知道要启动哪个活动

---

注意：

OPEN\u ACTIVITY\u 1

您可以更改此值，但您需要注意的是，

Firebase

和

IntentFilter

对于这个愚蠢的问题，抱歉各位。问题是每当我单击通知时，意图都会传递给SplashActivity。我没有将意图从飞溅传递到主要活动。谢谢@Cahyo的帮助

我在

SplashActivity

[Activity(Label = "App", MainLauncher = true,
  LaunchMode = LaunchMode.SingleTop,
  ScreenOrientation = ScreenOrientation.Portrait,
  Theme = "@style/splashscreen", NoHistory = true)]
    public class SplashActivity : AppCompatActivity

    {

        static readonly string TAG = "X:" + typeof(SplashActivity).Name;

        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);

            if (Build.VERSION.SdkInt >= BuildVersionCodes.Lollipop)
            {
                Window.DecorView.SystemUiVisibility = StatusBarVisibility.Visible;
                Window.SetStatusBarColor(Android.Graphics.Color.Transparent);
            }

            InvokeMainActivity();
        }

        private void InvokeMainActivity()
        {
            var mainActivityIntent = new Intent(this, typeof(MainActivity));
            mainActivityIntent.AddFlags(ActivityFlags.NoAnimation); //Add this line
            StartActivity(mainActivityIntent);
        }

    }

 private void InvokeMainActivity()
        {
            var mainActivityIntent = new Intent(this, typeof(MainActivity));
            if (Intent.Extras != null)
            {
                mainActivityIntent.PutExtras(Intent.Extras);
            }
            mainActivityIntent.AddFlags(ActivityFlags.NoAnimation); //Add this line
            StartActivity(mainActivityIntent);
        } 

---

我没有；如果之前通知负载中没有click_action属性，并且该属性已工作，是否还有其他原因？感谢您的指导。根据firebase通知文档，“如果必须激发不同的意图，则通知消息的点击动作字段必须设置为该意图（当未指定点击动作时使用启动器意图）。”因此，我的疑问是，如果我们不使用任何特定的点击动作，Intent.GetExtra是否将为空？

 private void InvokeMainActivity()
        {
            var mainActivityIntent = new Intent(this, typeof(MainActivity));
            if (Intent.Extras != null)
            {
                mainActivityIntent.PutExtras(Intent.Extras);
            }
            mainActivityIntent.AddFlags(ActivityFlags.NoAnimation); //Add this line
            StartActivity(mainActivityIntent);
        }