Question

In the onCreate event i make an asynchronous request to the facebook api :

Utility.mAsyncRunner.request(null, params1,
                    new myListener());

In myListener’s onComplete Event i would like to set the image in an imageview

public class PhotoDisplayListener extends BaseRequestListener {

        @Override
        public void onComplete(final String response, final Object state) {
        //set my image with the url provided in the response
        ...parse json....
ImageView img = (ImageView)findViewById(R.id.img);


                URL ulrn = new URL(photourl);
                HttpURLConnection con = (HttpURLConnection)ulrn.openConnection();
                InputStream is = con.getInputStream();
                Bitmap bmp = BitmapFactory.decodeStream(is);
                if (null != bmp){
                    img.setImageBitmap(bmp);
                    setImage(bmp);
                    }
                else
                    System.out.println("The Bitmap is NULL");

                }catch(Exception e){} catch (FacebookError e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                    showToast(e.getMessage());
                }

}

}

the problem is that the imageview does not refresh with the new one set by me.
It sets it, by it doesn’t refresh it. If i lock and unlock the phone, the image appears as it should.
How can i force the refresh of the imageview?
Thanks!

Answer 1

You can’t update the UI thread from outside (another thread). I would recommend you to call instead a method on your activity to update the ImageView.

Article about this topic: Painless Threading