how to use GPS in java coding

Question

I have to trace my current location when my app is open by switching on the GPS

Answer 1

Use the available Google APIs, if your planning to use your app commercially you might need a license but if there's light traffic to your API calls then you don't need a license. Note that each call to update your location is considered as a call so if your API will be making several API calls then you might need to invest in a license.