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

for me I found this change fixed my issue. I had a repo that built find in July this year. Then as I kept my build environment up to date with flutter etc, it wouldn't build this project but built my other project fine. I found this difference:

--- a/android/build.gradle
+++ b/android/build.gradle
@@ -5,8 +5,8 @@ buildscript {
     }

     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
-        classpath 'com.google.gms:google-services:4.2.0'
+        classpath 'com.android.tools.build:gradle:3.3.0'
+        classpath 'com.google.gms:google-services:4.3.0'
     }
 }