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Firebase Notification Icon Is Gray

Although I did this solution which is in stackoverflow, the icon still the same.

    <meta-data   android:name="com.google.firebase.messaging.default_notification_icon"
android:resource="@mipmap/ic_launcher" />

here top icon:

enter image description here

and when I slide top bar, I see this: enter image description here

Where is the problem? I also use this website for creating transparent icon: https://jgilfelt.github.io/AndroidAssetStudio/icons-notification.html#source.space.trim=1&source.space.pad=0&name=ic_stat_ic_launcher

Also my res file like this right now (drawable folders from above link):

enter image description here

icon here: enter image description here

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Answer

The icon to be used for notifications must be white-colored and with transparent background else it will show a grey-colored box.

You can check out this article to know more.

I had the same problem and resolved it by making changes to the icon image.

Here's a sample image: Notification Logo

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source: stackoverflow.com
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