I’m not an Android Developer. I am a mobile test engineer. I have hired a dev team to develop my app and they did a great job as far as functionality goes. I’m not really impressed with the UI. After several attempts, I went with the best they’ve got. They didn’t provide a feature banner, Hi Res Promo and Hi Res icon images. I’ve emailed them to see if they can provide those but at this point, I may need to get the logo and color changed. If I hired another UI designer, how do I go about implementing it into my current apk file?