如果我知道图片的URL，如何获取图片大小？Android (java)

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class ImageSizeFetcher extends AsyncTask<String, Void, Integer[]> {

    private OnImageSizeFetchedListener listener;

    public ImageSizeFetcher(OnImageSizeFetchedListener listener) {
        this.listener = listener;
    }

    @Override
    protected Integer[] doInBackground(String... urls) {
        String imageUrl = urls[0];
        Integer[] imageSize = new Integer[2];
        try {
            URL url = new URL(imageUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setDoInput(true);
            connection.connect();
            InputStream input = connection.getInputStream();
            Bitmap bitmap = BitmapFactory.decodeStream(input);
            imageSize[0] = bitmap.getWidth();
            imageSize[1] = bitmap.getHeight();
            bitmap.recycle();
            input.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return imageSize;
    }

    @Override
    protected void onPostExecute(Integer[] imageSize) {
        if (listener != null) {
            listener.onImageSizeFetched(imageSize[0], imageSize[1]);
        }
    }

    public interface OnImageSizeFetchedListener {
        void onImageSizeFetched(int width, int height);
    }
}

String imageUrl = "https://example.com/image.jpg";
ImageSizeFetcher imageSizeFetcher = new ImageSizeFetcher(new ImageSizeFetcher.OnImageSizeFetchedListener() {
    @Override
    public void onImageSizeFetched(int width, int height) {
        // 在这里处理获取到的图片宽度和高度
        // width为图片宽度，height为图片高度
    }
});
imageSizeFetcher.execute(imageUrl);