ImageUploader.java

package rhumbix.rhumbix;

class ImageUploader
{
    public static int[] dimension = new int[2]; // dimension[0] = width, dimension[1] = height

    void cacheImageInMemory(File imageFile) {
        ...
    }

    void uploadToServers(File imageFile) {
        ...
    }
    
    public void upload(File imageFile) throws Exception{
        Map<String,Integer> test = new HashMap<String, Integer>();
        test.put("maxWidth", 10);
        test.put("maxHeight", 20);
        if (!this.validate(imageFile, test)) {
            return
        };
        this.uploadToServer(imageFile);
        this.cacheImageInMemory(imageFile);
    }

    public boolean validate(File imageFile, Map<String,Integer> test) throws Exception{
        // imageFile needs to be valid
        if (imageFile != null) {
            dimension[0] = ImageUtil.getWidth(imageFile);
            dimension[1] = ImageUtil.getHeight(imageFile);

            int mw = test.get("maxWidth"); // maxWidth

//            if (dimension[0] > 0 && mw > 0) {
            if (dimension[0] > 0) {

                if (dimension[0] <= mw && dimension[0] > 1) {
                    int mh = test.get("maxHeight"); // maxHeight

//                    if (dimension[1] > 0 && mh > 0) {
                    if (dimension[1] > 0) {

                        if (dimension[1] <= mh && dimension[1] > 1) {
                            return true;
                        } else {
                            return false;
                        }

                        return false;

                    } else {
                        throw new Exception("Invalid height");
                    }
                } else {
                    return false;
                }

            } else {
                throw new Exception("Invalid width");
            }

        } else {
            throw new Exception("imageFile is null");
        }

    }
}

Hi Kenneth Jiang. This is an experienced React Native Developer.
I can help you. please discuss more details via chat.
skype ID
live:.cid.722115df157063d7