Java tutorial
//package com.java2s; import android.app.Activity; import android.os.Process; import java.util.Deque; public class Main { private static Deque<Activity> sStack; public synchronized static void quit() { finishAllActivity(); Process.killProcess(Process.myPid()); } private static void finishAllActivity() { for (Activity a : sStack) { if (a != null && !a.isFinishing()) { a.finish(); } } sStack.clear(); } }