Android消息机制之四---Looper，Handler，Message例子

Android消息机制之四---Looper，Handler，Message

本博客主要作用是对之前的三篇博客所讲的Message，Handler，Looper进行例子显示。

将普通线程转化为Looper线程；

public class LooperThread extends Thread{    public LooperThread(){    }    @Override    public void run() {        //将当前线程初始化为Looper线程        Looper.prepare();        /*        添加其他处理，如实例化Handler（处理MessageQueue）         */        Handler handler = new Handler(){            @Override            public void handleMessage(Message msg) {                switch (msg.what){                    case 0:                        System.out.println("Looper Thread:" + msg.arg1);                        break;                }            }        };        new Thread(new WorkThread(handler)).start();        //开始循环处理消息        Looper.loop();    }}

编写Work线程；

public class WorkThread implements Runnable{    private Handler handler = null;    public WorkThread(Handler handler){        this.handler = handler;        System.out.println("work thread start");    }    @Override    public void run() {        for(int i = 0; i < 20; i++){            if(i % 2 == 0){//                Message msg = Message.obtain();//                msg.what = 0;//                msg.arg1 = i;                Message msg = Message.obtain(handler, 0, i, 0);                handler.sendMessage(msg);            } else{                System.out.println("Work Thread:" + i);            }        }    }}

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