Android的写EXIF GPS经纬度到JPEG失败(Android write EXIF GPS

我想补充，例如GPS数据，经度和纬度为JPEG照片。照片被Tab键卡（NFC）在logcat中可以显示正确的值捕获但这些价值不能被写入的JPG图片文件！

下面是我的代码：它是用来保存采取JPG文件并调用下面的方法，该方法被用来添加EXIF GPS参数转换成JPG格式的GPS参数，如经度和纬度都已经采取的另一项活动。

我用EXIF浏览器Firefox中看到的结果。

做为IO异常事项的位置？

以下是这可能导致失败的重要日志猫日志：11月7日至26日：48：30.386：d / NativeNfcTag（195）：标签丢失，重启轮询循环

 public static void writeFile (File photo, double latitude, double longitude) throws IOException{


    ExifInterface exif = null;

    try{
        Log.v("latiDouble", ""+latitude);
        Log.v("longiDouble", ""+longitude);
        exif = new ExifInterface(photo.getCanonicalPath());
        if (exif != null) {
        double latitu = latitude;
        double longitu = longitude;
        double alat = Math.abs(latitu);
        double along = Math.abs(longitu);
        String stringLati = convertDoubleIntoDegree(alat);
        String stringLongi = convertDoubleIntoDegree(along);
        exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE, stringLati);            
        exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE, stringLongi);
        Log.v("latiString", ""+ stringLati);
        Log.v("longiString", ""+ stringLongi);
        exif.saveAttributes();
        String lati = exif.getAttribute (ExifInterface.TAG_GPS_LATITUDE);  
         String longi = exif.getAttribute (ExifInterface.TAG_GPS_LONGITUDE);  
         Log.v("latiResult", ""+ lati);
         Log.v("longiResult", ""+ longi);

        }
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();

    }

}

以下是调用该方法的位置...

    Cursor locationCursor = dbHandler.fetchGpsLocationTypeByAttendInfoID(attendInfoId);
      if (locationCursor.getCount()>0) {
        double latitude = dbHandler.fetchDoubleItem(locationCursor,"LATITUDE");
        double longitude = dbHandler.fetchDoubleItem(locationCursor,"LONGITUDE");


            Log.v("latitude",""+latitude);
            Log.v("latitude",""+longitude);     

            try {
                GpsUtils.writeFile(photoFile, latitude, longitude);
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

    }
    dbHandler.close();

    cameraHandler.startPreview();

好吧，我这个挣扎了很长时间，但终于得到了它。我最后一次使用此代码的工作：

ExifInterface exif = new ExifInterface(imgFile.getCanonicalPath());
              //String latitudeStr = "90/1,12/1,30/1";
              double lat = location.getLatitude();
              double alat = Math.abs(lat);
              String dms = Location.convert(alat, Location.FORMAT_SECONDS);
              String[] splits = dms.split(":");
              String[] secnds = (splits[2]).split("\\.");
              String seconds;
              if(secnds.length==0)
              {
                  seconds = splits[2];
              }
              else
              {
                  seconds = secnds[0];
              }

              String latitudeStr = splits[0] + "/1," + splits[1] + "/1," + seconds + "/1";
              exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE, latitudeStr);

              exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE_REF, lat>0?"N":"S");

              double lon = location.getLongitude();
              double alon = Math.abs(lon);


              dms = Location.convert(alon, Location.FORMAT_SECONDS);
              splits = dms.split(":");
              secnds = (splits[2]).split("\\.");

              if(secnds.length==0)
              {
                  seconds = splits[2];
              }
              else
              {
                  seconds = secnds[0];
              }
              String longitudeStr = splits[0] + "/1," + splits[1] + "/1," + seconds + "/1";


              exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE, longitudeStr);
              exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF, lon>0?"E":"W");

              exif.saveAttributes();

          }