In a xamarin forms project, I have added Firebase plugin to my project to do push notification.
The plugin works well in my IOS project. I can see the data in the output and when the app is in background the notification pops up.
My problem: In my Android project the notification never pop up. I can see in output console the data send on Firebase platform, but when the app is in background the pop up does not appear and I have this error when I put the value com.AppName.urgent in my Strings.xml file
[FirebaseMessaging] Notification Channel set in AndroidManifest.xml has not been created by the app. Default value will be used.
I have not error when I put the value default but the notification still not appear
How can I make the notification appear on Android ?
Here is my code :
the strings.xml file in my android project :
<?xml version="1.0" encoding="UTF-8" ?>
<resources>
<string name="notification_channel_id">default</string>
</resources>
My Android Files : MainActivity
namespace AppName.Droid
{
[Activity(Label = "AppName", Icon = "@mipmap/icon", Theme = "@style/MainTheme", ConfigurationChanges = ConfigChanges.ScreenSize
| ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize
| ConfigChanges.Orientation, ScreenOrientation = ScreenOrientation.Portrait
)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
internal static MainActivity Instance { get; private set; }
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
LoadApplication(new App());
FirebasePushNotificationManager.ProcessIntent(this, Intent);
}
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
Stormlion.ImageCropper.Droid.Platform.OnActivityResult(requestCode, resultCode, data);
}
public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
{
Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);
base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode)
{
case AndroidMicrophoneService.RecordAudioPermissionCode:
if (grantResults[0] == Permission.Granted)
{
micService.OnRequestPermissionResult(true);
}
else
{
micService.OnRequestPermissionResult(false);
}
break;
}
}
}
}
My Firebase file : MainApplication
[Application]
public class MainApplication : Application
{
public MainApplication(IntPtr handle, JniHandleOwnership transer) : base(handle, transer)
{
}
public override void OnCreate()
{
base.OnCreate();
//Set the default notification channel for your app when running Android Oreo
if (Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.O)
{
//Change for your default notification channel id here
FirebasePushNotificationManager.DefaultNotificationChannelId = "FirebasePushNotificationChannel";
//Change for your default notification channel name here
FirebasePushNotificationManager.DefaultNotificationChannelName = "General";
}
//If debug you should reset the token each time.
#if DEBUG
FirebasePushNotificationManager.Initialize(this, true);
#else
FirebasePushNotificationManager.Initialize(this,false);
#endif
//Handle notification when app is closed here
CrossFirebasePushNotification.Current.OnNotificationReceived += (s, p) =>
{
};
}
}
In my app.xaml.cs :
public App()
{
InitializeComponent();
MainPage = new LInPage();
}
// Firebase Notifcation
CrossFirebasePushNotification.Current.OnTokenRefresh += (s, p) =>
{
System.Diagnostics.Debug.WriteLine($"MyTOKEN : {p.Token}");
};
CrossFirebasePushNotification.Current.OnNotificationReceived += (s, p) =>
{
System.Diagnostics.Debug.WriteLine("Received");
foreach (var data in p.Data)
{
System.Diagnostics.Debug.WriteLine($"Mydata {data.Key} : {data.Value}");
}
};
CrossFirebasePushNotification.Current.OnNotificationOpened += (s, p) =>
{
System.Diagnostics.Debug.WriteLine("Opened");
foreach (var data in p.Data)
{
System.Diagnostics.Debug.WriteLine($"Opended {data.Key} : {data.Value}");
}
};
}
SplashActivity.cs (Opening Screen Image) :
namespace AppName.Droid
{
[Activity(Theme = "@style/MyTheme.Splash", MainLauncher = true, NoHistory = true)]
public class SplashActivity : Activity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Create your application here
}
protected override async void OnResume()
{
base.OnResume();
await SimulateStartup();
}
async Task SimulateStartup()
{
await Task.Delay(1000); // Simulate a bit of startup work.
StartActivity(new Intent(Application.Context, typeof(MainActivity)));
}
}
}
My AndroidManifest.xml :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="98.0" package="com.AppName" android:versionCode="98">
<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="31" />
<application android:label="AppName" android:theme="@style/MainTheme" android:icon="@mipmap/icon_round">
<activity android:name="com.theartofdev.edmodo.cropper.CropImageActivity" android:theme="@style/Base.Theme.AppCompat" />
<meta-data android:name="com.google.firebase.messaging.default_notification_channel_id" android:value="@string/notification_channel_id" />
<!-- optional (needed if default theme has no action bar) -->
<service android:name="crc6494e14b9856016c30.PNFirebaseMessagingService" android:exported="false">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
</application>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-feature android:name="android.hardware.location" android:required="false" />
<uses-feature android:name="android.hardware.location.gps" android:required="false" />
<uses-feature android:name="android.hardware.location.network" android:required="false" />
<queries>
<intent>
<action android:name="android.intent.action.SENDTO" />
<data android:scheme="mailto" />
</intent>
</queries>
</manifest>
I have followed these links but without success :
