Android ImageView如何加载网络图片资源

package com.android.antking.imageview;    import java.io.InputStream;  import java.net.HttpURLConnection;  import java.net.MalformedURLException;  import java.net.URL;    import android.app.Activity;  import android.graphics.Bitmap;  import android.graphics.BitmapFactory;  import android.os.Bundle;  import android.util.Log;  import android.view.View;  import android.widget.ImageView;    public class MainActivity extends Activity {   //定义一个图片显示控件   private ImageView imageView;      /** Called when the activity is first created. */      @Override      public void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);          //图片资源          String url = "http://s16.sinaimg.cn/orignal/89429f6dhb99b4903ebcf&690";          //得到可用的图片          Bitmap bitmap = getHttpBitmap(url);          imageView = (ImageView)this.findViewById(R.id.imageViewId);          //显示          imageView.setImageBitmap(bitmap);               }      /**       * 获取网落图片资源        * @param url       * @return       */      public static Bitmap getHttpBitmap(String url){       URL myFileURL;       Bitmap bitmap=null;       try{        myFileURL = new URL(url);        //获得连接        HttpURLConnection conn=(HttpURLConnection)myFileURL.openConnection();        //设置超时时间为6000毫秒，conn.setConnectionTiem(0);表示没有时间限制        conn.setConnectTimeout(6000);        //连接设置获得数据流        conn.setDoInput(true);        //不使用缓存        conn.setUseCaches(false);        //这句可有可无，没有影响        //conn.connect();        //得到数据流        InputStream is = conn.getInputStream();        //解析得到图片        bitmap = BitmapFactory.decodeStream(is);        //关闭数据流        is.close();       }catch(Exception e){        e.printStackTrace();       }           return bitmap;             }  }