Wallpaper app in Sketchware using local images

Code:

WallpaperManager wallpaperManager = WallpaperManager.getInstance(getApplicationContext());

try { 

Bitmap bitmap = ((android.graphics.drawable.BitmapDrawable) imageview.getDrawable()).getBitmap();

wallpaperManager.setBitmap(bitmap);

} 

catch (Exception g) { 

g.printStackTrace(); 

}