Extremely minimalist Android APP that posts and receives from server

1-Tell what's your technical need to begin (domain, servers access etc) ? 2-Deliver Source of Android APP that : -Posts to a online database simple data (text, numbers, boolean) -Automatically Synchronize online database content with the phone app -The synchronized data must be stored in the phone -APP MUST be Commented 3-Setup the server side to correct synchonization.