The icon shows on my Note 5 with Android 7. But it can't be shown on a S7 with Android 8 and a Note 8 with Android 9 (also can't be shown on the emulator with Android 8.1 API 24). I already put my app's icon files in the following folders
icon.png with 192x192 in drawable-xxxhdpi folder,
icon.png with 144x144 in drawable-xxhdpi folder,
icon.png with 96x96 in drawable-xhdpi,
icon.png with 72x72 in drawable-hdpi,
icon.png with 72x72 in drawable
And the AndroidManifest with
<application android:label="myAppName" android:icon="@drawable/icon">
<meta-data android:name="com.google.android.geo.API_KEY" android:value="myApp's api key" />
</application>
How to solve the problem?