Sir,
I read your requirements, and you mainly need to improve the UI of your app...
You also want to remove the warnings from your app during build process...
you can visit my portfolio and, from there you can see that I am pretty good at designing UI for any app... I can help you in any way possible to improve your app... And, since I am new here, so you don't need to worry about the quality of the work.. you will get the services work from me...
Hope to hear from you soon... Once, you tell me more about the project, I can help you with improving it, and I can also show my skills to you...
have a great day ahead.