Android-Cdma手机定位

时间:2024-01-12 08:36:44

对于Android CDMA手机获取当前位置,其实有更便利的办法,就是哄骗CdmaCellLocation.getBaseStationLatitude(),然则getBaseStationLatitude()获取的是int值的纬度,在android doc里也没有具体的论说。国外的论坛也有人说getBaseStationLatitude()返回的是垃圾信息,昨天google到一个泡菜国兄弟的帖子才找到getBaseStationLatitude()获取的是int值与真正经纬度之间的关系。

也就是CDMA层3和谈的定义:

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

/**

* Longitude is a decimal number as specified in 3GPP2 C.S0005-A v6.0.
     * It is represented in units of 0.25 seconds and ranges -2592000
     * to 2592000, both values inclusive (corresponding to a range of -180
     * to +180 degrees). Integer.MAX_VALUE is considered invalid value.
     */

是以只要将getBaseStationLatitude()做如下处理惩罚即可:

double lat = (double)myCDMACellLoc.getBaseStationLatitude()  /14400;
double lon = (double)myCDMACellLoc.getBaseStationLongitude() /14400;

/14400即  *90/1296000

如许题目就解决了!!!

关键代码:

    1. telephonyManager =(TelephonyManager)getSystemService(TELEPHONY_SERVICE);
    2. myCDMACellLoc = (CdmaCellLocation)telephonyManager.getCellLocation();
    3. double lat = (double)myCDMACellLoc.getBaseStationLatitude()  /14400;
    4. double lon = (double)myCDMACellLoc.getBaseStationLongitude() /14400;