Android 得到照片位置信息

目前Android SDK定义的Tag有:
TAG_DATETIME    时间日期
TAG_FLASH   闪光灯
TAG_GPS_LATITUDE   纬度
TAG_GPS_LATITUDE_REF  纬度参考
TAG_GPS_LONGITUDE   经度
TAG_GPS_LONGITUDE_REF  经度参考
TAG_IMAGE_LENGTH   图片长
TAG_IMAGE_WIDTH   图片宽
TAG_MAKE   设备制造商
TAG_MODEL   设备型号
TAG_ORIENTATION   方向
TAG_WHITE_BALANCE   白平衡

String sFileName="/sdcard/DCIM/Camera/1.JPG";
try{
      ExifInterface exif = new ExifInterface(sFileName);
      String sModel=exif.getAttribute(ExifInterface.TAG_MODEL);
      Toast.makeText(PhotoCatActivity.this,"1.JPG Exif:"+sModel, Toast.LENGTH_SHORT).show();
} catch(Exception ee){
     
}

经纬度得到的数据格式是 "num1/denom1,num2/denom2,num3/denom3"，如何得到真正的经纬度呢？

public Location exif2Loc(String flNm) {
  String sLat = "", sLatR = "", sLon = "", sLonR = "";
  try {
    ExifInterface ef = new ExifInterface(flNm);
    sLat  = ef.getAttribute(ExifInterface.TAG_GPS_LATITUDE);
    sLon  = ef.getAttribute(ExifInterface.TAG_GPS_LONGITUDE);
    sLatR = ef.getAttribute(ExifInterface.TAG_GPS_LATITUDE_REF);
    sLonR = ef.getAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF);
  } catch (IOException e) {return null;}

  double lat = dms2Dbl(sLat);
  if (lat > 180.0) return null;
  double lon = dms2Dbl(sLon);
  if (lon > 180.0) return null;

  lat = sLatR.contains("S") ? -lat : lat;
  lon = sLonR.contains("W") ? -lon : lon;

  Location loc = new Location("exif");
  loc.setLatitude(lat);
  loc.setLongitude(lon);
  return loc;
}


//-------------------------------------------------------------------------
double dms2Dbl(String sDMS){
  double dRV = 999.0;
  try {
    String[] DMSs = sDMS.split(",", 3);
    String s[] = DMSs[0].split("/", 2);
    dRV = (new Double(s[0])/new Double(s[1]));
    s = DMSs[1].split("/", 2);
    dRV += ((new Double(s[0])/new Double(s[1]))/60);
    s = DMSs[2].split("/", 2);
    dRV += ((new Double(s[0])/new Double(s[1]))/3600);
  } catch (Exception e) {}
  return dRV;
}

如何根据经纬度得到具体的地址？

public final String getAddress(double latitude, double longitude) {
  Geocoder gc = new Geocoder(this, Locale.getDefault());
  StringBuilder sb = new StringBuilder();
  try {
   List

add = gc.getFromLocation(latitude, longitude, 1);
   if (add.size() > 0) {
    Address ad = add.get(0);
    sb.append(ad.getAddressLine(0));
    sb.append(ad.getAddressLine(1));
    sb.append(ad.getAddressLine(2));
   }
  } catch (Exception e) {


  }
  return sb.toString();
 }