玩转手机定位 cdma

今天帮助朋友找人时研究了下手机定位，先说一下C网的。

Andriod手机可以用*#*#4636#*#* 或 *983*0#手动获取手机登记的基站位置Lat Long

如图



得到LAT和LONG后，用下面的代码获取对应的经纬度

/**
 * Latitude is a decimal number asspecified in 3GPP2 C.S0005-A v6.0.
 * It is represented in units of 0.25seconds and ranges from -1296000
 * to 1296000, both values inclusive(corresponding to a range of -90
 * to +90 degrees). Integer.MAX_VALUEis considered invalid value.
 */

/**
 * Longitude is a decimal number asspecified in 3GPP2 C.S0005-A v6.0.
 * It is represented in units of 0.25seconds and ranges from -2592000
 * to 2592000, both values inclusive(corresponding to a range of -180
 * to +180 degrees).Integer.MAX_VALUE is considered invalid value.
 */
#include <stdio.h>
int main()
{

        int iLat = 0x6a1d0;
        int iLong = 0x1a65e2;
        double fLat = (double)iLat * 90 / 1296000;
        double fLong =(double)iLong * 180 / 2592000;
        printf("lat=%lf long=%lf\n", fLat, fLong);
}

$ ./a.out
lat=30.183333 long=120.140139

好了，现在直接用Google地图/地球搜索 30.183333 120.140139，怎么样，找到了吧，呵呵

上面只是验证过程，在手机中手动获取LAT和LONG，程序实现可以调用现成的函数获取对应经纬度的整数值，然后再转换成经纬度
CdmaCellLocation.getBaseStationLatitude()
CdmaCellLocation.getBaseStationLongitude()

从核心网侧获取用户位置的信令应该也有的，等改天有时间再补上。