需求：

• 在做移动端附近的人的功能时，通过高德定位模块得到对应的经纬度信息，但是需要知道两个点之间的距离

1、代码来源：

在Maven仓库中找到7.9.1的jar包，jar中有AMapUtils的工具类

implementation 'com.amap.api:3dmap:7.9.1'

2、二次封装

public class AMapUtils {

    public static double calculateLineDistance(LatLng var0, LatLng var1) {
        if (var0 != null && var1 != null) {
            return calculateLineDistance(var0.latitude, var0.longitude, var1.latitude, var1.longitude);
        } else {
            try {
                throw new Exception("非法坐标值");
            } catch (Exception var27) {
                var27.printStackTrace();
                return 0.0;
            }
        }
    }

    public static double calculateLineDistance(double latitude1,
                                               double longitude1,
                                               double latitude2,
                                               double longitude2) {
        try {
            double var2 = longitude1;
            double var4 = latitude1;
            double var6 = longitude2;
            double var8 = latitude2;

            var2 *= 0.01745329251994329D;
            var4 *= 0.01745329251994329D;
            var6 *= 0.01745329251994329D;
            var8 *= 0.01745329251994329D;
            double var10 = Math.sin(var2);
            double var12 = Math.sin(var4);
            double var14 = Math.cos(var2);
            double var16 = Math.cos(var4);
            double var18 = Math.sin(var6);
            double var20 = Math.sin(var8);
            double var22 = Math.cos(var6);
            double var24 = Math.cos(var8);
            double[] var28 = new double[3];
            double[] var29 = new double[3];
            var28[0] = var16 * var14;
            var28[1] = var16 * var10;
            var28[2] = var12;
            var29[0] = var24 * var22;
            var29[1] = var24 * var18;
            var29[2] = var20;
            return (Math.asin(Math.sqrt((var28[0] - var29[0]) * (var28[0] - var29[0]) + (var28[1] - var29[1]) * (var28[1] - var29[1]) + (var28[2] - var29[2]) * (var28[2] - var29[2])) / 2.0D) * 1.27420015798544E7D);
        } catch (Throwable var26) {
            var26.printStackTrace();
            return 0.0;
        }

    }

}

public final class LatLng implements Cloneable {

    public final double latitude;
    public final double longitude;

    public LatLng(double latitude, double longitude) {
        this(latitude, longitude, true);
    }

    public LatLng(double latitude, double longitude, boolean var5) {
        if (!var5) {
            this.latitude = latitude;
            this.longitude = longitude;
        } else {
            if (-180.0D <= longitude && longitude < 180.0D) {
                this.longitude = longitude;
            } else {
                this.longitude = ((longitude - 180.0D) % 360.0D + 360.0D) % 360.0D - 180.0D;
            }

            if (latitude < -90.0D || latitude > 90.0D) {
                try {
                    throw new Exception("非法坐标值");
                } catch (Exception var6) {
                    var6.printStackTrace();
                }
            }

            this.latitude = Math.max(-90.0D, Math.min(90.0D, latitude));
        }
    }

    public final LatLng clone() {
        return new LatLng(this.latitude, this.longitude);
    }

    public final int hashCode() {
        long var2 = Double.doubleToLongBits(this.latitude);
        int var1 = 31 + (int) (var2 ^ var2 >>> 32);
        var2 = Double.doubleToLongBits(this.longitude);
        return 31 * var1 + (int) (var2 ^ var2 >>> 32);
    }

    public final boolean equals(Object var1) {
        if (this == var1) {
            return true;
        } else if (!(var1 instanceof LatLng)) {
            return false;
        } else {
            LatLng var2 = (LatLng) var1;
            return Double.doubleToLongBits(this.latitude) == Double.doubleToLongBits(var2.latitude) && Double.doubleToLongBits(this.longitude) == Double.doubleToLongBits(var2.longitude);
        }
    }

    public final String toString() {
        return "lat/lng: (" + this.latitude + "," + this.longitude + ")";
    }

    public final int describeContents() {
        return 0;
    }

}

3、使用

public class Main {

    public static void main(String[] args) {

        double lat1 = 39.923423, lng1 = 116.368904;

        double lat2 = 39.922501, lng2 = 116.387271;

        double v = AMapUtils.calculateLineDistance(new LatLng(lat1, lng1), new LatLng(lat2, lng2));
        System.out.println("通过LatLng对象计算：两个点之间的距离为：" + v + " 米");

        double v1 = AMapUtils.calculateLineDistance(lat1, lng1, lat2, lng2);
        System.out.println("直接传入经纬度计算：两个点之间的距离为：" + v1 + " 米");

    }
}

4、计算结果

计算结果

• 本文地址：https://blog.csdn.net/qq_40183053/article/details/117916248