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我正在尝试将位置信息写入使用相机通过我的应用程序拍摄的照片并将控制权返回给应用程序。它在模拟器上运行时运行良好，但是当我在三星上运行时，注入设备位置信息未被捕获。请让我知道我做错了什么。

启动意图的方法

private void takePicutre(){
    Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);

    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); 
    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); 
    startActivityForResult(intent, 2);
}

创建用于保存图像的文件 Uri

private static Uri getOutputMediaFileUri(int type){
      return Uri.fromFile(getOutputMediaFile(type));
}

创建用于保存图像的文件

private static File getOutputMediaFile(int type){
    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
              Environment.DIRECTORY_PICTURES), "MyApp");

    if (! mediaStorageDir.exists()){
        if (! mediaStorageDir.mkdirs()){
            return null;
        }
    }
        String timeStamp = new
          SimpleDateFormat("yyyyMMdd_HHmmss").format(Calendar.getInstance().getTime());

    File mediaFile;
    if (type == MEDIA_TYPE_IMAGE){
        mediaFile = new File(mediaStorageDir.getPath() + File.separator +
        "IMG_"+ timeStamp + ".jpg");
    } else {
        return null;
    }

    return mediaFile;
}

写入 EXIF 数据

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

ExifInterface exif;
double latitude = cls_raw_lat;
double longitude = cls_raw_lon;
try {
 exif = new ExifInterface(fileUri.getPath());
 int num1Lat = (int)Math.floor(latitude);
 int num2Lat = (int)Math.floor((latitude - num1Lat) * 60);
 double num3Lat = (latitude - ((double)num1Lat+ ((double)num2Lat/60))) * 3600000;

 int num1Lon = (int)Math.floor(longitude);
 int num2Lon = (int)Math.floor((longitude - num1Lon) * 60);
 double num3Lon = (longitude - ((double)num1Lon+((double)num2Lon/60))) * 3600000;

exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE,
num1Lat+"/1,"+num2Lat+"/1,"+num3Lat+"/1000");                   

exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE,  
num1Lon+"/1,"+num2Lon+"/1,"+num3Lon+"/1000");


if (latitude > 0) {
    exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE_REF, "N"); 
} else {
    exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE_REF, "S");
}
if (longitude > 0) {
    exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF, "E");    
} else {
   exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF, "W");
}

exif.saveAttributes();

} catch (IOException e) {
Toast.makeText(this, "Error: "+e.getMessage(),
Toast.LENGTH_LONG).show();  
}       

}
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