NoClassDefFoundError Landroid/arch/lifecycle/LifecycleDispatcher

Question

I want to try out the new lifecycle stuff from google (https://developer.android.com/arch) but getting a crash on app open. All I have done is add the dependencies. Is anyon

Answer 1

I was using some gradle configurations

android.enableR8.desugaring=false
android.enableJetifier=true
android.useAndroidX=true

To work again I removed android.enableR8.desugaring=false of gradle.properties file

Answer 2

This occurs even without Proguard. Today I could create the problem by creating the sample Flutter app in Android Studio and then running 'flutter pub upgrade'.

The solution that worked for me was to add to the app build.gradle file under 'dependencies'

dependencies { ... implementation 'com.android.support:appcompat-v7:28.0.0' }

If your app uses androidx, add to the gradle.properties file:

android.useAndroidX=true android.enableJetifier=true

Answer 3

Do you use Proguard? If so, try to turn it off:

debug {
    minifyEnabled false
    useProguard false
}

Or you can add custom rule to your Proguard config:

-keep class android.arch.** { *; }