Flutter firebase messaging: Cannot solve problem with white Square instead of icon for push notifications

Question

I have created the icons here:

https://romannurik.github.io/AndroidAssetStudio/icons-notification.html#source.type=clipart&source.clipart=lightbulb_outline&source.space.trim=1&source.space.pad=0&name=ic_stat_lightbulb_outline

added the png-files to the android/app/src/main/res drawable folders and renamed the icons to notification_icon.png.

and added

<meta-data android:name="com.google.firebase.messaging.default_notification_icon" android:resource="@drawable/notification_icon" /> <meta-data android:name="com.google.firebase.messaging.default_notification_color" android:resource="@color/colorAccent" />

to the AndroidManifest.

But I still get the white square (Simulator and Device) instead of the icon.

The minSdkVersion is 19 (21 also does not work) and the targetSdkVersion is 33

Does anyone has an idea what could be the problem?

Answer 1

The problem was I defined the

<meta-data android:name="com.google.firebase.messaging.default_notification_icon"                     android:resource="@drawable/notification_icon" /> <meta-data android:name="com.google.firebase.messaging.default_notification_color"                     android:resource="@color/colorAccent" />

inside the activity-tag and not inside the application-tag