Crash with Android 4.1 with ArrayMap

Question

I get an error in my code with this logcat:

java.lang.NoClassDefFoundError: android.util.ArrayMap
at it.dd.multiplayerit.MainActivity.(MainActivi         


        

Answer 1

ArrayMap was introduced in Api level 19, but it was also released in the compatibility library v4, so it would be enough to change the import to android.support.v4.util.ArrayMap instead of android.util.ArrayMap

Answer 2

For now it migrates to AndroidX. Instead of android.util.ArrayMap you will write androidx.collection.ArrayMap