Create android mp3 downloader source code

Hi all I need a brand new android mp3 downloader source code, so I need an experienced android app developer to build it. I need a completely new source code, instead of the existing and modified source code which is commonly sold in codecanyon or in chupamobile, or source code made from decompiled another app. The app I need is using [login to view URL] api like this app, [login to view URL], so it will just provide a legal and non-copyright songs. I also need to be able to implement my admob code in the app. The source code also should be easy to customize, like change the text and toolbar color, and easy to change the background image. Thank you.