How to remove icon border in Android 12

Question

Assuming this is my app icon

It works fine in Android 11 (and below)

but when I install the app in Android 12, there is a white border around the icon in the splash screen (also a black border around the top app icon.)

Is there any way I can remove those borders? below is my splash code

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
    android:opacity="opaque">

    <item android:drawable="@color/colorBlack"/>

    <item>
        <bitmap
            android:src="@drawable/notice"/>
    </item>
</layer-list>

Also this line in my AndroidManifest.xml

 android:roundIcon="@drawable/notice"

Answer 1

There seems a misusage in your terminology splash screen. It should be called Recents screen in the screen shots.

So this is not a problem about Splash screen. This should be a problem about a launcher icon using Adaptive icon.

By default, in template projects on Android Studio, the launcher icons in the Manifest are:

android:icon="@mipmap/ic_launcher"
android:roundIcon="@mipmap/ic_launcher_round"

And both of mipmaps are:

<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
    <background android:drawable="@drawable/ic_launcher_background" />
    <foreground android:drawable="@drawable/ic_launcher_foreground" />
</adaptive-icon>

Lastly, both of these ic_launcher_foreground and ic_launcher_background are vector drawables. (note that you can also use @color instead of a vector drawable)

As you can notice, layer-list or bitmap is not used. You can use an Adaptive icon on API-26+.