用android原生代码实现联网得到图片

package com.bruce.okhttpdemo;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.AsyncTask;import android.os.Bundle;import android.widget.ImageView;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;public class MainActivity extends Activity {    ImageView img;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initWidget();    }    private void initWidget() {        img = (ImageView) findViewById(R.id.img);        //        new AsyncTask() {  //异步删除数据，并且设置到适配器            @Override            protected Object doInBackground(Object[] objects) {                URL url = null;                try {                    url = new URL("http://d.hiphotos.baidu.com/news/q%3D100/sign=b96864cc8cd4b31cf63c90bbb7d7276f/d6ca7bcb0a46f21f4d8c21dcf1246b600d33ae81.jpg");                } catch (MalformedURLException e) {                    e.printStackTrace();                }                return getusericon(url);            }            @Override            protected void onPostExecute(Object o) {                super.onPostExecute(o);                Bitmap bitmap = (Bitmap) o;                img.setImageBitmap(bitmap);            }        }.execute();    }    /**     * 根据一个网络连接(URL)获取bitmap图像     *     * @param imageUri     * @return     */    public static Bitmap getusericon(URL imageUri) {        // 显示网络上的图片        URL myFileUrl = imageUri;        Bitmap bitmap = null;        try {            HttpURLConnection conn = (HttpURLConnection) myFileUrl                    .openConnection();            conn.setDoInput(true);            conn.connect();            InputStream is = conn.getInputStream();            bitmap = BitmapFactory.decodeStream(is);            is.close();        } catch (IOException e) {            e.printStackTrace();        }        return bitmap;    }}
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