Android中GPS坐标转换为高德地图坐标详解

public AMapLocation fromGpsToAmap(Location location) { 
    AMapLocation aMapLocation = new AMapLocation(location); 
    CoordinateConverter converter = new CoordinateConverter(mContext); 
    converter.from(CoordinateConverter.CoordType.GPS); 
    try { 
      converter.coord(new DPoint(location.getLatitude(), location.getLongitude())); 
      DPoint desLatLng = converter.convert(); 
      aMapLocation.setLatitude(desLatLng.getLatitude()); 
      aMapLocation.setLongitude(desLatLng.getLongitude()); 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } 
    return aMapLocation; 
  } 

public AMapLocation fromGpsToAmap(Location location) { 
  LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude()); 
  latLng = CoordinateUtil.transformFromWGSToGCJ(latLng); 
  AMapLocation aMapLocation = new AMapLocation(location); 
  aMapLocation.setLatitude(latLng.latitude); 
  aMapLocation.setLongitude(latLng.longitude); 
 
  return aMapLocation; 
} 

public class CoordinateUtil { 
  private static double a = 6378245.0; 
  private static double ee = 0.00669342162296594323; 
 
  /** 
   * 手机GPS坐标转火星坐标 
   * 
   * @param wgLoc 
   * @return 
   */ 
  public static LatLng transformFromWGSToGCJ(LatLng wgLoc) { 
 
    //如果在国外，则默认不进行转换 
    if (outOfChina(wgLoc.latitude, wgLoc.longitude)) { 
      return new LatLng(wgLoc.latitude, wgLoc.longitude); 
    } 
    double dLat = transformLat(wgLoc.longitude - 105.0, 
        wgLoc.latitude - 35.0); 
    double dLon = transformLon(wgLoc.longitude - 105.0, 
        wgLoc.latitude - 35.0); 
    double radLat = wgLoc.latitude / 180.0 * Math.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) * Math.PI); 
    dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * Math.PI); 
 
    return new LatLng(wgLoc.latitude + dLat, wgLoc.longitude + dLon); 
  } 
 
  public static double transformLat(double x, double y) { 
    double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y 
        + 0.2 * Math.sqrt(x > 0 ? x : -x); 
    ret += (20.0 * Math.sin(6.0 * x * Math.PI) + 20.0 * Math.sin(2.0 * x 
        * Math.PI)) * 2.0 / 3.0; 
    ret += (20.0 * Math.sin(y * Math.PI) + 40.0 * Math.sin(y / 3.0 
        * Math.PI)) * 2.0 / 3.0; 
    ret += (160.0 * Math.sin(y / 12.0 * Math.PI) + 320 * Math.sin(y 
        * Math.PI / 30.0)) * 2.0 / 3.0; 
    return ret; 
  } 
 
  public static double transformLon(double x, double y) { 
    double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 
        * Math.sqrt(x > 0 ? x : -x); 
    ret += (20.0 * Math.sin(6.0 * x * Math.PI) + 20.0 * Math.sin(2.0 * x 
        * Math.PI)) * 2.0 / 3.0; 
    ret += (20.0 * Math.sin(x * Math.PI) + 40.0 * Math.sin(x / 3.0 
        * Math.PI)) * 2.0 / 3.0; 
    ret += (150.0 * Math.sin(x / 12.0 * Math.PI) + 300.0 * Math.sin(x 
        / 30.0 * Math.PI)) * 2.0 / 3.0; 
    return ret; 
  } 
 
  public static boolean outOfChina(double lat, double lon) { 
    if (lon < 72.004 || lon > 137.8347) 
      return true; 
    if (lat < 0.8293 || lat > 55.8271) 
      return true; 
    return false; 
  } 
 
}