AsyncTask实现网络图片的异步加载

 1     //-----------------------AsyncTask异步访问图片-----------------------
 2     
 3     public void showImageByAsyncTask(ImageView imageView,String url){
 4         new NewsAsyncTask(imageView).execute(url);
 5     }
 6     
 7     public class NewsAsyncTask extends AsyncTask<String, Void, Bitmap>{
 8 
 9         private ImageView mImageView;
10         
11         public NewsAsyncTask(ImageView imageView){
12             mImageView = imageView;
13         }
14         
15         @Override
16         protected Bitmap doInBackground(String... params) {
17             // TODO Auto-generated method stub
18             return getBitmapFromUrl(params[0]);
19         }
20         
21         @Override
22         protected void onPostExecute(Bitmap bitmap) {
23             // TODO Auto-generated method stub
24             super.onPostExecute(bitmap);
25             mImageView.setImageBitmap(bitmap);
26         }
27     }
28     
29     //------------------------------------------------------------------
30 }