Lambda expressions in android

Question

How use lambda expressions in android? For example, I compile this code in IntelliJ IDEA:

package com.example.myapp;

import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;

public class MyActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        test s = () -> {return "Lambda expressions test";};
        AlertDialog alertDialog = new AlertDialog.Builder(this)
                .setTitle("Lambda expression")
                .setMessage(s.t())
                .create();
        alertDialog.show();
    }
}
interface test {
    public String t();
}

But have this erorrs:

Information:Using javac 1.8.0_05 to compile java sources
Information:36 errors
Information:0 warnings
Information:Compilation completed with 36 errors and 0 warnings in 29 sec
Error:Android Dex: [myappі] UNEXPECTED TOP-LEVEL EXCEPTION:
Error:Android Dex: [myappі] com.android.dx.cf.iface.ParseException: InvokeDynamic not supported 

How to set up so you can use lambda expressions?

Answer 1

Android only supports java 6 and 7. You can use plugins to get lambdas though such as https://github.com/evant/gradle-retrolambda.