Gridview with universal image loader images are loading slowly - image

Question

i'm using universal image loader to populate thumbnails into gridview from assets gallary but images are loading slowly during scrolling up or down so i think because images are being loaded with it's current resolution so how i can change the resolution of the images for example i used to use createScaledBitmap to scale down the bitmap
Here is my code :
public class ImageAdapter extends BaseAdapter {
private Context mContext;
private List<String> mList;
private int mheight;
private int mwidth;
private InputStream is;
private HomePage homePage;
private ImageLoader imageLoader;
public ImageAdapter(Context context, List<String> list, int height, int width) {
mContext = context;
mList = list;
mheight = height;
mwidth = width;
ImageLoader imageLoader = ImageLoader.getInstance();
this.imageLoader = imageLoader;
}
#Override
public int getCount() {
return mList.size();
}
#Override
public Object getItem(int position) {
return mList.get(position).toString();
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) {
imageView = new ImageView(mContext);
} else {
imageView = (ImageView) convertView;
}
File cacheDir = new File(Environment.getExternalStorageDirectory(), "UniversalImageLoader/Cache");
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(mContext)
.threadPoolSize(5)
.memoryCacheExtraOptions(mwidth/3, mwidth/3)
.threadPriority(Thread.MIN_PRIORITY )
.memoryCache(new UsingFreqLimitedMemoryCache(5000000)) // You can pass your own memory cache implementation
.discCache(new UnlimitedDiscCache(cacheDir)) // You can pass your own disc cache implementation
.build();
imageLoader.init(config);
//
//
//display options
DisplayImageOptions options = new DisplayImageOptions.Builder()
.showStubImage(R.drawable.loading)
.showImageForEmptyUri(R.drawable.loading)
.cacheInMemory()
.cacheOnDisc()
.bitmapConfig(Bitmap.Config.RGB_565)
.imageScaleType(ImageScaleType.EXACTLY)
.build();
// // Create configuration for ImageLoader
String imString = mList.get(position);
String imageUria = "assets://"+imString;
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(mwidth/3, mwidth/3));
imageLoader.displayImage(imageUria, imageView ,options );
return imageView ;
}
}