Hello, Sir.
Please see following for checking my skill https://www.elance.com/s/rian_rian/10183#backurl=aHR0cHM6Ly93d3cuZWxhbmNlLmNvbS9yL2NvbnRyYWN0b3JzL3EtcmlhbnJpYW4=.
I have full experiences for Android app.
I have rich experience in REST API, SOAP API, JSON/XML, PHP & MySQL Web Service API, Facebook API, Twitter API, Foursquare API, MapKit, Payment Gateway APIs, External devices, eCommerce platforms.
I can complete your app in a hour.
Best Regards