Android之多线程通讯handler和Message(一)

最简单的message与handler通信，学好这个是学习多线程通讯的基础，所以先从最简单的开始。

主代码：

package com.bvin.test.thread;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Button;

public class MessageActivity extends Activity implements View.OnClickListener{
    /** Called when the activity is first created. */
    Button bt;
    Handler handler = new Handler(){

        @Override
        public void handleMessage(Message msg) {
            // TODO Auto-generated method stub
            super.handleMessage(msg);
            if(msg.what==0){
                Log.e("哈哈", "接收到了消息哦");
            }
        }
        
    };
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        initViews();
    }
    
    void initViews(){
        bt = (Button)findViewById(R.id.bt);
        bt.setOnClickListener(this);
        
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        if(v == bt){
            //Message msg = new Message();
            Message msg = Message.obtain();
            msg.what = 0;
            handler.sendMessage(msg);
        }
    }
    
    
}

1.点击开始按钮

用handler发送消息，log打出来

2.log栏查看: