AsyncExecutor executor;
    AsyncResult<Pixmap> pending;

public MerchScreen(MainClass gam ) {
executor = new AsyncExecutor(1);

render()

if (pending != null) {
            if (pending.isDone()) {
                if (imageSelected1 != null) {
                    imageSelected1.dispose();
                }

                if(file.exists()) {
                    imageSelected1 = new Texture(file);
                    selected1 = new TextureRegionDrawable(new TextureRegion(imageSelected1));
                    style2.up = skin.newDrawable(skin.newDrawable(selected1));
                    style2.down = skin.newDrawable(skin.newDrawable(selected1));

                }

}

___________
public void pickingImage() {
        if (gallery != null) {
            gallery.pickImage(new GalleryOpener.Callback() {
                public void onImagePicked(final InputStream stream) {
                    loading = "Loading";
                    pending = executor.submit(new AsyncTask<Pixmap>() {
                        @Override
                        public Pixmap call() throws Exception {
                            StreamUtils.copyStream(stream, file.write(false));
                            final byte[] bytes = file.readBytes();
                            final Pixmap pix = new Pixmap(bytes, 0, bytes.length);
                            return pix;
                        }
                    });
                }
            });
        }
    }