Build me an Android app

I want an app which can be used to conduct elections. The admin can create elections and set time duration of a particular election. After specified time it should become inactive. Admin can generate keys and share it with users. Users can log into their account use that key and caste their vote. User can vote only one time with a particular key. The admin can add candidates or remove candidates. User is shown a list of candidates with their picture, name, age etc. After the time period the admin can see the results of elections along with the votes (or a sorted list of candidates from max to min votes).

I want a working apk along with source code and documentation.