java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/util/ArrayMap;

Question

Today i found this error while trying to run my app. I made the following attempts towards solving it. - First i removed multidex support, but i can still see the slices of

Answer 1

I faced the same problem with Flutter and this question was the first link on Google when I searched my error:

java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/util/ArraySet

So the root of your problem might be same: AndroidX adaptation. Adding those lines to gradle.properties fixed my problem:

android.useAndroidX=true
android.enableJetifier=true

You may also want to add compileSdkVersion 28 to your app-level build.gradle file. For further information