Question

在我的Android应用程序中，我想从图像中获取地理标记（lat，long）信息。我有这个代码但它总是获得地理信息的空值。其他信息读得很好。我启用了卫星设置的GPS，并启用了相机应用程序中的地理标记选项。然而，当我拍照时，地理信息是空值。有谁知道出了什么问题？

我的手机是带有android 4.1.2（SGH-T989D）的三星Galaxy S2X。

        try {
            String imagefile = MyImage.getPath(this, data.getData());
            ExifInterface exifInterface = new ExifInterface(imagefile);
             String exif="Exif: " + imagefile;
               exif += "\nIMAGE_LENGTH: " + exifInterface.getAttribute(ExifInterface.TAG_IMAGE_LENGTH);
               exif += "\nIMAGE_WIDTH: " + exifInterface.getAttribute(ExifInterface.TAG_IMAGE_WIDTH);
               exif += "\n DATETIME: " + exifInterface.getAttribute(ExifInterface.TAG_DATETIME);
               exif += "\n TAG_MAKE: " + exifInterface.getAttribute(ExifInterface.TAG_MAKE);
               exif += "\n TAG_MODEL: " + exifInterface.getAttribute(ExifInterface.TAG_MODEL);
               exif += "\n TAG_ORIENTATION: " + exifInterface.getAttribute(ExifInterface.TAG_ORIENTATION);
               exif += "\n TAG_WHITE_BALANCE: " + exifInterface.getAttribute(ExifInterface.TAG_WHITE_BALANCE);
               exif += "\n TAG_FOCAL_LENGTH: " + exifInterface.getAttribute(ExifInterface.TAG_FOCAL_LENGTH);
               exif += "\n TAG_FLASH: " + exifInterface.getAttribute(ExifInterface.TAG_FLASH);
               exif += "\nGPS related:";
               exif += "\n TAG_GPS_DATESTAMP: " + exifInterface.getAttribute(ExifInterface.TAG_GPS_DATESTAMP);
               exif += "\n TAG_GPS_TIMESTAMP: " + exifInterface.getAttribute(ExifInterface.TAG_GPS_TIMESTAMP);
               exif += "\n TAG_GPS_LATITUDE: " + exifInterface.getAttribute(ExifInterface.TAG_GPS_LATITUDE);
               exif += "\n TAG_GPS_LATITUDE_REF: " + exifInterface.getAttribute(ExifInterface.TAG_GPS_LATITUDE_REF);
               exif += "\n TAG_GPS_LONGITUDE: " + exifInterface.getAttribute(ExifInterface.TAG_GPS_LONGITUDE);
               exif += "\n TAG_GPS_LONGITUDE_REF: " + exifInterface.getAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF);
               exif += "\n TAG_GPS_PROCESSING_METHOD: " + exifInterface.getAttribute(ExifInterface.TAG_GPS_PROCESSING_METHOD);

               Toast.makeText(this,
                 "finished",
                 Toast.LENGTH_LONG).show();


        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(this, e.toString(),Toast.LENGTH_LONG).show();
        }

权限

<uses-permission
    android:name="common.permission.MAPS_RECEIVE"
    android:protectionLevel="signature" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />

Android在读取地理Exif数据时获取空值

0 个答案: