android_经纬度坐标系转换_010

 
public class CoordinateTrans {
	public static final String TAG = CoordinateTrans.class.getSimpleName();
	private static double x_pi = 3.14159265358979324 * 3000.0 / 180.0;
	private static double PI = 3.1415926535897932384626;
	private static double a = 6378245.0;
	private static double ee = 0.00669342162296594323;
	public static double lat = 22.561015;
	public static double lng = 113.949727;
	/**
	 * 将 BD-09 to GCJ-02
	 */
	public static double[] bd_decrypt(double bd_lat, double bd_lon) {
	    double gg_lat = 0.0;
	    double gg_lon = 0.0;
	    double location[] = new double[2];
	    double x = bd_lon - 0.0065, y = bd_lat - 0.006;
	    double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
	    double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
	    gg_lon = z * Math.cos(theta);
	    gg_lat = z * Math.sin(theta);
	    location[0] = gg_lat;
	    location[1] = gg_lon;
	    return location;
	}
	/**
	 * GCJ02 to WGS84
	 * 
	 * @param lng
	 * @param lat
	 * @returns {*[]}
	 */
	public static double[] gcj02towgs84(double lng, double lat) {
	    double location[] = {
	            lng, lat
	    };
	    if (out_of_china(lng, lat)) {
	        return location;
	    } else {
	        double dlat = transformlat(lng - 105.0, lat - 35.0);
	        double dlng = transformlng(lng - 105.0, lat - 35.0);
	        double radlat = lat / 180.0 * PI;
	        double magic = Math.sin(radlat);
	        magic = 1 - ee * magic * magic;
	        double sqrtmagic = Math.sqrt(magic);
	        dlat = (dlat * 180.0) / ((a * (1 - ee)) / (magic * sqrtmagic) * PI);
	        dlng = (dlng * 180.0) / (a / sqrtmagic * Math.cos(radlat) * PI);
	        double mglat = lat + dlat;
	        double mglng = lng + dlng;
	        lng = lng * 2 - mglng;
	        lat = lat * 2 - mglat;
	        location[0] = lng;
	        location[1] = lat;
	        return location;
	    }
	}
	/****
	 * WGS-84 to GCJ-02
	 * 
	 * @param wgsLat
	 * @param wgsLon
	 * @return [参数说明]
	 * @return double[] [返回类型说明]
	 */
	public double[] gcj_encrypt(double wgsLat, double wgsLon) {
	    double[] gcj_02 = {
	            wgsLat, wgsLon
	    };
	    if (out_of_china(wgsLat, wgsLon)) {
	        return gcj_02;
	    }
	    double[] d = this.delta(wgsLat, wgsLon);
	    gcj_02[0] = gcj_02[0] + d[0];
	    gcj_02[1] = gcj_02[1] + d[1];
	    return gcj_02;
	}
	/**
	 * GCJ-02 to BD-09
	 */
	public static double[] bd_encrypt(double gg_lat, double gg_lon) {
	    double bd_lat = 0.0;
	    double bd_lon = 0.0;
	    double location[] = new double[2];
	    double x = gg_lon, y = gg_lat;
	    double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
	    double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
	    bd_lon = z * Math.cos(theta) + 0.0065;
	    bd_lat = z * Math.sin(theta) + 0.006;
	    location[0] = bd_lat;
	    location[1] = bd_lon;
	    LogUtil.d(TAG, "bd_lat = " + bd_lat + ",bd_lon = " + bd_lon);
	    return location;
	}
	public static double transformlat(double lng, double lat) {
	    double ret = -100.0 + 2.0 * lng + 3.0 * lat + 0.2 * lat * lat + 0.1
	            * lng * lat + 0.2 * Math.sqrt(Math.abs(lng));
	    ret += (20.0 * Math.sin(6.0 * lng * PI) + 20.0 * Math.sin(2.0 * lng
	            * PI)) * 2.0 / 3.0;
	    ret += (20.0 * Math.sin(lat * PI) + 40.0 * Math.sin(lat / 3.0 * PI)) * 2.0 / 3.0;
	    ret += (160.0 * Math.sin(lat / 12.0 * PI) + 320 * Math.sin(lat * PI
	            / 30.0)) * 2.0 / 3.0;
	    return ret;
	}
	public static double transformlng(double lng, double lat) {
	    double ret = 300.0 + lng + 2.0 * lat + 0.1 * lng * lng + 0.1 * lng
	            * lat + 0.1 * Math.sqrt(Math.abs(lng));
	    ret += (20.0 * Math.sin(6.0 * lng * PI) + 20.0 * Math.sin(2.0 * lng
	            * PI)) * 2.0 / 3.0;
	    ret += (20.0 * Math.sin(lng * PI) + 40.0 * Math.sin(lng / 3.0 * PI)) * 2.0 / 3.0;
	    ret += (150.0 * Math.sin(lng / 12.0 * PI) + 300.0 * Math.sin(lng / 30.0
	            * PI)) * 2.0 / 3.0;
	    return ret;
	}
	/**
	 * 判断是否在国内，不在国内则不做偏移
	 * 
	 * @param lng
	 * @param lat
	 * @returns {boolean}
	 */
	public static boolean out_of_china(double lng, double lat) {
	    return (lng < 72.004 || lng > 137.8347)
	            || ((lat < 0.8293 || lat > 55.8271) || false);
	}
	public double[] delta(double lat, double lon) {
	    double dLat = transformlat(lon - 105.0, lat - 35.0);
	    double dLon = transformlng(lon - 105.0, lat - 35.0);
	    double radLat = lat / 180.0 * PI;
	    double magic = Math.sin(radLat);
	    magic = 1 - ee * magic * magic;
	    double sqrtMagic = Math.sqrt(magic);
	    dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * PI);
	    dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * PI);
	    double lang[] = {
	            dLat, dLon
	    };
	    return lang;
	}
}