code: protected InputStream getStreamFromDrawable(String imageUri, Object extra) {
  		String drawableIdString = Scheme.DRAWABLE.crop(imageUri);
  		int drawableId = Integer.parseInt(drawableIdString);
  		return context.getResources().openRawResource(drawableId);
  	}
docs: Retrieves {@link InputStream} of image by URI (image is located in drawable resources of application).
  
  @param imageUri Image URI
  @param extra    Auxiliary object which was passed to {@link DisplayImageOptions.Builder#extraForDownloader(Object)
  DisplayImageOptions.extraForDownloader(Object)}; can be null
  @return {@link InputStream} of image