CalculateUtil.java

package com.cheng.utils;

/**
 * Created by Android on 2015/12/12.
 */
public class CalculateUtil {
    /**
     * 经纬度测距
     * @param jingdu1
     * @param weidu1
     * @param jingdu2
     * @param weidu2
     * @return
     */
    public static double distance(double jingdu1, double weidu1, double jingdu2,   double weidu2) {
        double a, b, R;
        R = 6378137; // 地球半径
        weidu1 = weidu1 * Math.PI / 180.0;
        weidu2 = weidu2 * Math.PI / 180.0;
        a = weidu1 - weidu2;
        b = (jingdu1 - jingdu2) * Math.PI / 180.0;
        double d;
        double sa2, sb2;
        sa2 = Math.sin(a / 2.0);
        sb2 = Math.sin(b / 2.0);
        d = 2
                * R
                * Math.asin(Math.sqrt(sa2 * sa2 + Math.cos(weidu1)
                * Math.cos(weidu2) * sb2 * sb2));
        return d;
    }
}