Decode APK and Repackage

Hi Guys, We would like to develop an apps that plays video online streaming videos, we have found an very good app that can do that, we will need to decode the app, and repackage it with few changed. Including: - Logo - change the URL links for xml request. And then repackage it to APK, also provide us with the source code for future references. - Make sure the delivered APK can function as original version. If you not sure what to do , feel free to ask. Prefer someone understand chinese language since the app is in chinese.