universal image loader setwallpaper error

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Java

Mobile

Android

hello i have a problem with universal-image-loader setting wallpaper from ViewPager when i set wallpaper it sets different wallpaper or i can say it sets the next wallpaper to the one i want to set i don't know how to fix it thanks in advance ..

pager class

 @Override
        public void onLoadingComplete(String imageUri, View view,
                Bitmap loadedImage) {
            spinner.setVisibility(View.GONE);
            current_bitmap = loadedImage;
        }

    });

b.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View arg0) {
        WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
        try {
          myWallpaperManager.setBitmap(current_bitmap);
        } catch (IOException e) {
          e.printStackTrace();
        }
    }
});