之间的距离或其他检查当前位置是否在标记半径内的方法

Question

我想检查用户的当前位置是否在某个标记的特定半径范围内。我应该用 distanceBetween() 来做吗？我必须传递什么参数才能传递此函数，结果究竟是什么意思？

LatLng markerPosition = marker.getPosition();
myLocation = locationManager.getLastKnownLocation(provider);
double latitude = myLocation.getLatitude();
double longitude = myLocation.getLongitude();

distanceBetween(???);

 public static void distanceBetween (double startLatitude, double startLongitude, double endLatitude, double endLongitude, float[] results) {

}

Answer 1

你可以简单的使用

distanceTo(Location location)

从位置 class 执行此操作，例如：

Location makerLoc = new Location("marker");
markerLoc.setLatitude(markerPosition.latitude);
markerLoc.setLongitude(markerPosition.longtitude);
float meters = myLocation.distanceTo(markerLoc);

Answer 2

请使用 Google 地图工具 Library

这个库提供了非常简单的距离计算，就像您需要的那样

例如：

computeDistanceBetween() – Returns the distance, in meters, between two 
latitude/longitude coordinates.

computeHeading() – Returns the bearing, in degrees, between two 
latitude/longitude coordinates.

computeArea() – Returns the area, in square meters, of a closed path on the 
Earth.

interpolate() – Returns the latitude/longitude coordinates of a point that 
lies a given fraction of the distance between two given points. You can use 
this to animate a marker between two points, for example.

之间的距离或其他检查当前位置是否在标记半径内的方法

distanceBetween or other way to check if current position is in radius to marker

java

android

google-maps

location

latitude-longitude