Android Java.lang.illegalargumentexception: Path Must Be Convex

Same Application Work in Android 7 and Failed in Android 8. On an activity i am retrieving data from Fire-base database. when Fire-base database is empty then no error occurred and

Solution 1:

Looking at the stack trace, the first few lines tell a story:

java.lang.IllegalArgumentException: path must be convex
        at android.graphics.Outline.setConvexPath(Outline.java:284)
        at android.graphics.drawable.AdaptiveIconDrawable.getOutline(AdaptiveIconDrawable.java:387)
        at android.view.ViewOutlineProvider$1.getOutline(ViewOutlineProvider.java:38)
        at android.view.View.rebuildOutline(View.java:14960)
        at android.view.View.setBackgroundBounds(View.java:19416)
        at android.view.View.drawBackground(View.java:19381)

• 3rd line mentions AdaptiveIconDrawable
• 7th line mentions View.drawBackground()

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Searching for AdaptiveIconDrawable tells us that this is a new Android 8 feature:

• Android Developers reference

That explains why your code works on Android 7 but crashes on 8. On Android 7 the system does not use adaptive icons, but instead uses a normal PNG. On Android 8 it will use an adaptive icon if you have supplied one.

There seems to be something wrong with the new icon, or it just doesn't work where you are using it.

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Next we need to find out what background is breaking...

Looking at your CardView layout, you are setting your launcher icon (on Android 8 this is likely to be your AdaptiveIconDrawable) onto your CircleImageView background.

That is where the crash is happening - either the icon is not valid, or CircleImageView does not support it when used this way.

A fix would be to include a PNG icon in your app that will work as the background in this case.

Solution 2:

Assuming your icon is set up properly, try setting the icon for CircleImageView using android:src instead of android:background.