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'
     }
 }

Answer 2

I had the same problem and solved it by editing the build.gradle file like this:

...

dependencies {
  implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
  testImplementation 'junit:junit:4.12'
  androidTestImplementation 'com.android.support.test:runner:1.0.2'
  androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

  //Add these lines to fix the error.
  implementation 'com.google.firebase:firebase-analytics:17.2.1'
  implementation 'com.google.firebase:firebase-auth:19.2.0'
  implementation 'com.google.firebase:firebase-firestore:21.3.0'
}

apply plugin: 'com.google.gms.google-services'

Answer 3

It looks you are missing v4 support library in your app gradle dependencies. Try by adding v4 support library

compile 'com.android.support:support-v4:25.1.1'

Answer 4

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