code: public void loadImage(String uri, ImageLoadingListener listener) {
  		loadImage(uri, null, null, listener, null);
  	}
docs: Adds load image task to execution pool. Image will be returned with
  {@link ImageLoadingListener#onLoadingComplete(String, android.view.View, android.graphics.Bitmap)} callback}.
  <br />
  <b>NOTE:</b> {@link #init(ImageLoaderConfiguration)} method must be called before this method call
  
  @param uri      Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
  @param listener {@linkplain ImageLoadingListener Listener} for image loading process. Listener fires events on UI
  thread if this method is called on UI thread.
  @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before