[移动开发]Android的消息机制，handler多种用法

handler消息机制和handler多种用法：https://blog.csdn.net/yhy123456q/article/details/80666730

android中的线程和线程池：https://www.jianshu.com/p/78444487c5ab

android 快速切换到主线程更新UI的几种方法：https://blog.csdn.net/da_caoyuan/article/details/52931007

Application初始化多线程和handler机制

//多种用法具体看Handler提供的方法

private static Handler mHandler = new Handler(Looper.getMainLooper());
public static ExecutorService threadPool = Executors.newCachedThreadPool();//线程池

  mHandler.post(new Runnable() {
            @Override
            public void run() {

            }
        });

  threadPool.submit(new Runnable() {
            @Override
            public void run() {

            }
        });