Error:Jack is required to support java 8 language features

Question

When I tried to update my android project to use Java 8 after getting android studio 2.1 and android N SDK by adding

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}

I had this error

Error:Jack is required to support java 8 language features. Either enable Jack or remove sourceCompatibility JavaVersion.VERSION_1_8.

What should I do?

Answer 1

Error:Jack is required to support java 8 language features. Either enable Jack or remove sourceCompatibility JavaVersion.VERSION_1_8.

The error say that you have to enable Jack.

To enable support for Java 8 in your Android project, you need to configure your build.gradle file like that

android {
  ...


  compileSdkVersion 23
  buildToolsVersion "24rc2"
  defaultConfig {
  ...
    jackOptions {
      enabled true
    }
  }

  compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
  }
}