Android 网络显示图片 通过代理访问

主要的代码参考：http://www.cnblogs.com/hnrainll/archive/2012/05/28/2522558.html

重点看如何在Android代码中设置代理。

代码如下：

public class MainDemo extends Activity {
    /** Called when the activity is first created. */

    private ImageView imageView = null;

    private String urlString = "http://s7.sinaimg.cn/middle/9b82a8c54c10ecacbb686&960";
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        imageView = (ImageView) findViewById(R.id.imageview01);
        imageView.setImageBitmap(returnBitmap(urlString));
    }

    public Bitmap returnBitmap(String url) {
        Bitmap bm = null;

        try {
            HttpURLConnection conn = getUrlConnection(url);
            conn.setDoInput(true);
            conn.connect();
            InputStream is = conn.getInputStream();
            bm = BitmapFactory.decodeStream(is);
            is.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return bm;
    }

35     private HttpURLConnection getUrlConnection(String url) {
36         java.net.Proxy p = new java.net.Proxy(java.net.Proxy.Type.HTTP,
37                         new InetSocketAddress("172.20.220.2",
38                                 8080));
39         try {
40             return (HttpURLConnection) new URL(url).openConnection(p);
41         } catch (MalformedURLException e) {
42             // TODO Auto-generated catch block
43             e.printStackTrace();
44         } catch (IOException e) {
45             // TODO Auto-generated catch block
46             e.printStackTrace();
47         }
48         return null;
49     }
}