Specific view not opening on notification tap when app is terminated

Question

I am working on push notifications in Xamarin.Forms using Plugin.FirebasePushNotification. Notifications are not opening specific view when app terminated(killed from taskbar).

When app open or in background, I am able to navigate to specific page when clicking on notification. This is Application class

public class AppClass : Android.App.Application, Android.App.Application.IActivityLifecycleCallbacks
{
    public override void OnCreate()
    {
        base.OnCreate();
        RegisterActivityLifecycleCallbacks(this);
        FirebasePushNotificationManager.Initialize(this,false,true);
        var instanceid = FirebaseInstanceId.Instance.Token;
    }
}

MainActivity class

protected override void OnCreate(Bundle savedInstanceState)
{
    TabLayoutResource = Resource.Layout.Tabbar;
    ToolbarResource = Resource.Layout.Toolbar;
    base.OnCreate(savedInstanceState);
    global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
    LoadApplication(new App());
}

protected override void OnNewIntent(Intent intent)
{
    base.OnNewIntent(intent);
    FirebasePushNotificationManager.ProcessIntent(this, intent);
}

App.xaml.cs class in shared project

protected override void OnStart()
{
    CrossFirebasePushNotification.Current.OnNotificationOpened += (s, p) =>
    {
        if (p.Data.ContainsKey("color"))
        {
        Device.BeginInvokeOnMainThread(() =>
        {
            Xamarin.Forms.Application.Current.MainPage.Navigation.PushModalAsync(new Page1()
            {
                BackgroundColor = Color.FromHex($"{p.Data["color"]}")
            });
        });
        }
    };
}

This is payload I am sending from Postman

{ 
 "to":"dhNe4U_jSDo:APA91bHhupDfnqW5Y9EBIfWV-uQVmq_HyPXTzBZ_TnSfM-7cDEq8SUFDLeudA4vWzyMj28E8A_c5HS0F2f5xT8quWZHcmWL8RJEbeDNre3RMsuY7brcAxqQMQOMCDcVXWDsl7s15l-NC", 
 "notification" : {
 "body" : "New announcement assigned",
 "content_available" : true,
 "priority" : "max",
 "color":"Page1",
 "content_available" : true,
 "title": "notification TITLE",
 "content_available" : true,
 "body": "notification BODY",
 },
 "data" : {
 "OrganizationId":"2",
 "color":"Page1",
 "click_action":"MainActivity"
 "sectionId":"33",
 "priority" : "high",
 "title": "notification TITLE",
 "content_available" : true,
 "body": "notification BODY",
}
}

This is my menifest class

<application android:label="FCMPush.Android">
    <uses-permission android:name="android.permission.INTERNET" />
    <receiver
      android:name="com.google.firebase.iid.FirebaseInstanceIdInternalReceiver" 
      android:exported="false" />
    <receiver
          android:name="com.google.firebase.iid.FirebaseInstanceIdReceiver"
          android:exported="true"
          android:permission="com.google.android.c2dm.permission.SEND">
        <intent-filter>
          <action android:name="com.google.android.c2dm.intent.RECEIVE" />
          <action android:name="com.google.android.c2dm.intent.REGISTRATION" />
          <category android:name="${applicationId}" />
        </intent-filter>      
    </receiver>
</application>

I have assigned this issue on GitHub as well. Thank you.

Answer 1

Well, I am not really sure where the issue might be. However, if we take a look at the docs: https://github.com/CrossGeeks/FirebasePushNotificationPlugin/blob/master/docs/GettingStarted.md, there are several things that you can try.

First of all set Exported = true and LaunchMode = LaunchMode.SingleTop in your MainActivity. Also set FirebasePushNotificationManager.ProcessIntent(this, Intent); in your onCreate(), right after LoadApplication(new App());.

Note that as of Android 8.0, you have to set DefaultNotificationChannelId and DefaultNotificationChannelName in your Application's onCreate() as well.

Then, if you have a SplashActivity, make sure you add MainLauncher = true, NoHistory = true to it, and the following code in onCreate():

var mainIntent = new Intent(Application.Context, typeof(MainActivity));

 if (Intent.Extras != null) {
     mainIntent.PutExtras(Intent.Extras);
 }
 mainIntent.SetFlags(ActivityFlags.SingleTop);
 StartActivity(mainIntent);

I would also recommend you to take a look at the following folder of the repo: https://github.com/CrossGeeks/FirebasePushNotificationPlugin/tree/master/samples/FirebasePushSample/FirebasePushSample.Android. If you carefully follow all code, it should work.