How can I get the distance between two point by latlng?

Question

I want to get the distance from A to B by latlng.When i run my app with the following code,it return a wrong result. Fx i tryed A( 31.172740,115.0081630) ,then B（30.6055980,

Answer 1

There is an api provided by android itself to get distance between two points. Use:

Location.distanceBetween(
    startLatitude,
    startLongitude,
    endLatitude,
    endLongitude,
    results);

which returns distance in meters.