Android Handler简单使用

 package com.example.myhandlertest3;

 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.support.v7.app.ActionBarActivity;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.TextView;
 /**
  * Android Handler
  * @author shaobn
  * @date 2015/9/9
  */
 public class MainActivity extends ActionBarActivity {
     private Button button;
     private TextView tv;
     private Handler handler;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         button = (Button)this.findViewById(R.id.button1);
         handler = new Handler(){

             public void handleMessage(android.os.Message msg) {

                 Bundle bundle = msg.getData();
                 String data = bundle.getString("color");
                 MainActivity.this.button.append(data);
             };
         };
         final Runnable runnable = new Runnable() {

             @Override
             public void run() {
                 // TODO Auto-generated method stub
                 String color = "red";
                 Message message = new Message();
                 Bundle bundle = new Bundle();
                 bundle.putCharSequence("color", color);
                 message.setData(bundle);
                 MainActivity.this.handler.sendMessage(message);
                 try {
                     Thread.sleep(3000);
                 } catch (Exception e) {
                     // TODO: handle exception
                     e.printStackTrace();
                 }
             }
         };
         button.setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View arg0) {
                 // TODO Auto-generated method stub
                 new Thread(runnable).start();
             }
         });
     }

 }

自己随便写的一个demo，记录一下。