我想在jpeg照片中添加经度和纬度等GPS数据.
通过标签卡(NFC)捕获照片
在logcat中可以显示正确的值但是这些值不能写入jpg照片文件中！
通过标签卡(NFC)捕获照片
在logcat中可以显示正确的值但是这些值不能写入jpg照片文件中！
以下是我的代码：
它用于获取保存的jpg文件并调用下面的方法
该方法用于将EXIF GPS参数添加到jpg中
诸如经度和纬度的GPS参数已经在另一活动中被采用.
我在Firefox中使用EXIF Viewer来查看结果.
IO异常的位置是否重要？
以下是可能导致失败的重要日志cat日志：
07-26 11：48：30.386：D / NativeNfcTag(195)：标记丢失,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();
解决方法
好吧,我很长时间都在努力,但终于明白了.上次我使用它时这个代码工作：
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," + seconds + "/1";
exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE,longitudeStr);
exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF,lon>0?"E":"W");
exif.saveAttributes();
}