As an experienced Android developer with an eye for visually-pleasing and user-friendly UX/UI designs, I can confidently meet and exceed your requirements for this project. Having previously worked on numerous reverse engineering jobs, I'm quite comfortable in working with provided source code. My proficiency in Java and Kotlin adds to the versatility and quality of my work.
Specifically, my understanding of how users interact and engage with applications is valuable for your menu improvement needs. Not only can I ensure the selection menu fills the screen optimally, but I can also make effective adjustments to button sizes for better alignment. Better yet, with a keen eye for detail, I can modify font size without compromising on accessibility or legibility.
Looking into my arsenal of tools, you'll find that I primarily work with Android Studio which allows me to craft the best possible applications with little-to-no compromise. Additionally, being well acquainted with NetBeans, Cod-block, SQL sever, MySQL, etc., I have interdisciplinary expertise that allows me to see beyond just the surface aesthetic when making tweaks to your app's UI design.