Adding Rx and Retrolambda in an Android project

build.gradle

apply plugin: 'me.tatarka.retrolambda' //actives use of Retrolambda

buildscript {
  repositories {
    jcenter(); // to find plugins
  }
  dependencies {
    classpath 'me.tatarka:gradle-retrolambda:3.3.0-beta4' //retrolambda
    classpath 'me.tatarka.retrolambda.projectlombok:lombok.ast:0.2.3.a2' //lombok for that makes lint work with retrolambda
  }
  configurations.classpath.exclude group: 'com.android.tools.external.lombok' //lombok package to exclude to make it work

}

retrolambda {
  javaVersion JavaVersion.VERSION_1_7 //what version should retrolambda generate
}

android {
  compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8 //to be able to use lambdas and stuff
    targetCompatibility JavaVersion.VERSION_1_8
  }
}

dependencies {
  compile 'io.reactivex:rxjava:1.0.10'  //RxJava
  compile 'io.reactivex:rxandroid:1.1.0'  //AndroidSchedulers.UiThread()
}