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Adaptive icon does not cover default black background #522

@kamilchlebek

Description

@kamilchlebek

I noticed small issue when trying to setup splash screen on Android >= 12.

Namely there's a little bit of black color on the edges of the icon.

The issue is related with #424 which added android:inset="16.7%" to the foreground & background.
I suppose that due to calculation inaccuracy (1/6 ≈ 16.7%), the background is too small and doesn't cover default background that lies underneath.

Workaround

Change: android:inset="16.7%" to android:inset="16.6%"

Actual (left), Expected (right)

splash

Here's a StackOverflow thread that describes how are icons rendered:

https://stackoverflow.com/a/49869048/9932919

It links to android source that explains where does that black color come from:

https://android.googlesource.com/platform/frameworks/base/+/oreo-release/graphics/java/android/graphics/drawable/AdaptiveIconDrawable.java#351

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