# Fast way to setup Retrolambda on an android project.

Retrolambda is a library which allows to use Java 8 lambda expressions, method references and try-with-resources statements on Java 7, 6 or 5.

The Gradle Retrolambda Plug-in allows to integrate Retrolambda into a Gradle based build. This allows for example to use these constructs in an Android application, as standard Android development currently does not yet support Java 8.

# Setup and example how to use:

Setup Steps:

  • Download and install jdk8.
  • Add the following to your project’s main build.gradle
    buildscript {
        repositories {
        dependencies {
            classpath 'me.tatarka:gradle-retrolambda:3.2.3'
  • Now add this to your application module’s build.gradle
    apply plugin: 'com.android.application' // or apply plugin: 'java'
    apply plugin: 'me.tatarka.retrolambda'
  • Add these lines to your application module’s build.gradle to inform the IDE of the language level:
    android {
        compileOptions {
            sourceCompatibility JavaVersion.VERSION_1_8
            targetCompatibility JavaVersion.VERSION_1_8
  • Example:

    So things like this:

    button.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

    Become this:

    button.setOnClickListener(v -> log("Clicked"));