How do I start with this GPS app? [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered开发者_如何学Python in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 12 years ago.

I need to implement an app that can track a GPS equipped vehicle and display it on a map.. For this I need a real time GPS tracker....I want to save the real time data into a db and from there display it on a map on user request.. I have it on mind like that but how do I proceed, starting with the hardware which GPS device is most eligible, and how can I interact with the GPS tracker to retrieve its position?

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The standard for GPS devices is NMEA 0183. so you are going to either work with that format directly, find a library that works with it directly (probably the most likely option) or find a vendor specific library / API.

NMEA 0183 is getting a bit dated and actually specifies an RS-232 serial connection. Few (if any?) modern GPS devices have such connections, instead they use USB and then the manufacturer supplies a driver which makes it look like an NMEA 0183 device on a COM port.

You don't mention which platform you are using. If you can restrict yourself to Windosw 7, then Windows 7 has a new "Location and Sensors API". I've dabbled with it a little bit, and assuming you can get a practical driver for your GPS driver, this would be an easy option to implement in something like C/C++. I don't have any experience with Java->Windows API functions - so this might a complication too many.