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。