How to get straight distance between two location in android?

Question

First read Question carefully ...

I need straight distance, not by walking,car,or etc.

Take a look to this image which given be

Answer 1

The Haversine function is used to find the distance between two points on a sphere.

It's fairly straightforward to extend this to finding the straight line distance between two points on the Earth. The Earth is not a perfect sphere, but this is still a good approximation using a standard measurement (called WGS84) for the radius at the equator.

As CommonsWare has said, you can do this very simply by using distanceBetween(), which uses the Haversine function and the WGS84 radius.

For better understanding of implementation/math, take a look at this sample code in Python.