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(); }
