android中Activity兑现再按一次退出

android中Activity实现再按一次退出
package com.chen.b;import android.os.Handler;import android.os.HandlerThread;public class Exit { private boolean isExit = false; private Runnable task = new Runnable() { @Override public void run() { isExit = false; } }; public void doExitInOneSecond() { isExit = true; HandlerThread thread = new HandlerThread("doTask"); thread.start(); new Handler(thread.getLooper()).postDelayed(task, 1000); } public boolean isExit() { return isExit; } public void setExit(boolean isExit) { this.isExit = isExit; } }