ImageView显示网络图片

package com.example.urlimage;  

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;  

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;  

public class MainActivity extends Activity {  

    //声明地址
    private Button btn;
    private ImageView img;
    private String url = "http://imgstore04.cdn.sogou.com/app/a/100520024/877e990117d6a7ebc68f46c5e76fc47a";  

    //在消息队列中实现对控件的更改
    private Handler handle = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
            case 0:
                System.out.println("111");
                Bitmap bmp=(Bitmap)msg.obj;
                img.setImageBitmap(bmp);
                break;
            }
        };
    };  

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);  

        btn = (Button) findViewById(R.id.btn);
        img = (ImageView) findViewById(R.id.img);  

        btn.setOnClickListener(new View.OnClickListener() {  

            @Override
            public void onClick(View v) {
                //新建线程加载图片信息，发送到消息队列中
                new Thread(new Runnable() {  

                    @Override
                    public void run() {
                        // TODO Auto-generated method stub
                        Bitmap bmp = getURLimage(url);
                        Message msg = new Message();
                        msg.what = 0;
                        msg.obj = bmp;
                        System.out.println("000");
                        handle.sendMessage(msg);
                    }
                }).start();
            }
        });
    }  

    //加载图片
    public Bitmap getURLimage(String url) {
        Bitmap bmp = null;
        try {
            URL myurl = new URL(url);
            // 获得连接
            HttpURLConnection conn = (HttpURLConnection) myurl.openConnection();
            conn.setConnectTimeout(6000);//设置超时
            conn.setDoInput(true);
            conn.setUseCaches(false);//不缓存
            conn.connect();
            InputStream is = conn.getInputStream();//获得图片的数据流
            bmp = BitmapFactory.decodeStream(is);
            is.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return bmp;
    }
}