如何在android中的两个位置之间获得直线距离？

Question

先仔细阅读问题......

我需要直线距离,而不是步行,汽车等.

看看下面给出的这张图片,

谷歌为我们提供驾车和驾车的距离.

但我不想要它,我希望两个位置之间的直线距离(纬度 - 经度).

显示为RED LINE.

注意:我不想在Google地图上放置红线,只想要单位距离(英里,公里等)

Answer 1

ANDROID

double distance

Location locationA = new Location(“point A”)

locationA.setLatitude(latA);

locationA.setLongitude(lngA);

Location locationB = new Location(“point B”);

locationB.setLatitude(latB);

LocationB.setLongitude(lngB);

distance = locationA.distanceTo(locationB);

MATHEMATICALY

a = distance in degrees //meterConversion = 1609;

b = 90 - latitude of point 1

c = 90 - latitude of point 2

l = longitude of point 1 - longitude of point 2

Cos(a) = Cos(b)Cos(c) + Sin(b)Sin(c)Sin(l)

d = circumference of Earth * a / 360 // circumference of Earth = 3958.7558657440545D km