Android : Develop GPS tracking system

I want to develop GPS tracking system to track vehicles. Some of the basic requirements are,

1. To get longitude, latitude of vehicle


2. Stop vehicle remotely by command, or web based control panel or SMS , or when it goes beyond the specified circle in map.


3. Get some information about vehicle other than location like, Fuel , vehicle state (key on/key off) etc.

I am thinking to develop this on Android and using web services. Android phone will be fitted in vehicle forever and that will be connected to vehicle with micro controller, and will use vehicle's battery. I am having electronics resource person to deal with electronics part.

My questions are.

1. Is there any best minimal way than I am approaching ? Like, does android device really needed ?


2. Is it possible to use that without internet connection ? (I know, for the requirement no 2 and 3 internet is must, but can my first requirement cant be fulfilled without internet ? )


3. Is there any tutorials available for this ?