Android Handler(二)子线程和子线程通信

Android Handler(二)子线程和子线程通信
子线程和子线程间通过Handler通信

    发送消息的子线程

    package com.cdc.handler;
    import android.os.Handler;
    import android.os.Message;
    import android.os.SystemClock;
    //发送消息的子线程
    public class Thread1 extends Thread {
        private Handler handler;

        public Thread1(Handler handler){
            super.setName("Thread1");
            this.handler=handler;
        }
        @Override
        public void run() {
            Message msg = Message.obtain();
            msg.what = 1;
            msg.obj = System.currentTimeMillis()+"";
            handler.sendMessage(msg);
            System.out.println((Thread.currentThread().getName() + "----发送了消息！" + msg.obj));
            SystemClock.sleep(1000);
        }
    }
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    接收消息的子线程

    package com.cdc.handler;
    import android.os.Handler;
    import android.os.Looper;
    //接收消息的子线程
    public class Thread2 extends Thread{
        private Handler handler2;
        public Handler getHandler(){//注意哦，在run执行之前，返回的是null
            return handler2;
        }
        public Thread2(){
            super.setName("Thread2");
        }
        @Override
        public void run() {
            //在子线程里面新建Handler的实例，需要先调用Looper.prepare();否则会报错:Can't create handler inside thread that has not called Looper.prepare()
            Looper.prepare();
            handler2 = new Handler(){
                public void handleMessage(android.os.Message msg) {
                    //这里处理消息
                    System.out.println(("收到消息了：" + Thread.currentThread().getName() + "----" + msg.obj));
                };
            };
            Looper.loop();

        }
    }
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    调用

     private Handler myHandler=null;
     private Thread2 thread1;
     private Thread1 thread2;

    @OnClick(R.id.handler3)
    public void handler3(){
    thread1=new Thread2();
    thread1.start();
    myHandler=thread1.getHandler();
    while(myHandler==null){
    SystemClock.sleep(100);
    myHandler=thread1.getHandler();
    }
    thread2=new Thread1(myHandler);
    thread2.start();
    }
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作者：cdcdec
来源：CSDN
原文：https://blog.csdn.net/cdc_csdn/article/details/80776978
版权声明：本文为博主原创文章，转载请附上博文链接！