Hi, I conclude your requirement into 3 things: 1. using api to extract basic info; 2. running in the background; 3. indicator at the notification bar. 1st is simple, just use api; I've done many background service coding so 2nd is not hard; I've also done the notification bar tweaking, though havent tried displaying rich content there. It should be fun though. Let's talk about more details using PM if you interested.