Lambda expressions crash with IncompatibleClassChangeError in Android when using jack

Question

I am using Java 8 in my Android project. I have setup both Jack (In android application module) and Retrolambda (in other modules).

The problem I am having is that my La

Answer 1

Google are no longer supporting android-jack.

Jack is no longer supported, and you should first disable Jack to use the Java 8 support built into the default toolchain

Android Studio 3.0 and later supports Lambdas expressions. Configure build.gradle file:

android {
...
// Configure only for each module that uses Java 8
// language features (either in its source code or
// through dependencies).
compileOptions {
  sourceCompatibility JavaVersion.VERSION_1_8
  targetCompatibility JavaVersion.VERSION_1_8
 }
}

Note: If Android Studio detects that your project is using Jack, Retrolambda, or DexGuard, the IDE uses Java 8 support provided by those tools instead. However, consider migrating to the default toolchain