前言

有时候，手机上的照片越来越多，一时想不起来从哪里照的。其实，android 照片（原图）中是可以获取到时间，地点这些信息的。本文介绍一些方法，同时也提醒大家注意信息保护。

具体步骤

1.主要android类ExifInterface

主要图片属性如下：

    public static final String TAG_APERTURE = "FNumber";
    public static final String TAG_APERTURE_VALUE = "ApertureValue";
    public static final String TAG_ARTIST = "Artist";
    public static final String TAG_BITS_PER_SAMPLE = "BitsPerSample";
    public static final String TAG_BRIGHTNESS_VALUE = "BrightnessValue";
    public static final String TAG_CFA_PATTERN = "CFAPattern";
    public static final String TAG_COLOR_SPACE = "ColorSpace";
    public static final String TAG_COMPONENTS_CONFIGURATION = "ComponentsConfiguration";
    public static final String TAG_COMPRESSED_BITS_PER_PIXEL = "CompressedBitsPerPixel";
    public static final String TAG_COMPRESSION = "Compression";
    public static final String TAG_CONTRAST = "Contrast";
    public static final String TAG_COPYRIGHT = "Copyright";
    public static final String TAG_CUSTOM_RENDERED = "CustomRendered";
    public static final String TAG_DATETIME = "DateTime";
    public static final String TAG_DATETIME_DIGITIZED = "DateTimeDigitized";
    public static final String TAG_DATETIME_ORIGINAL = "DateTimeOriginal";
    public static final String TAG_DEFAULT_CROP_SIZE = "DefaultCropSize";
    public static final String TAG_DEVICE_SETTING_DESCRIPTION = "DeviceSettingDescription";
    public static final String TAG_DIGITAL_ZOOM_RATIO = "DigitalZoomRatio";
    public static final String TAG_DNG_VERSION = "DNGVersion";
    public static final String TAG_EXIF_VERSION = "ExifVersion";
    public static final String TAG_EXPOSURE_BIAS_VALUE = "ExposureBiasValue";
    public static final String TAG_EXPOSURE_INDEX = "ExposureIndex";
    public static final String TAG_EXPOSURE_MODE = "ExposureMode";
    public static final String TAG_EXPOSURE_PROGRAM = "ExposureProgram";
    public static final String TAG_EXPOSURE_TIME = "ExposureTime";
    public static final String TAG_FILE_SOURCE = "FileSource";
    public static final String TAG_FLASH = "Flash";
    public static final String TAG_FLASHPIX_VERSION = "FlashpixVersion";
    public static final String TAG_FLASH_ENERGY = "FlashEnergy";
    public static final String TAG_FOCAL_LENGTH = "FocalLength";
    public static final String TAG_FOCAL_LENGTH_IN_35MM_FILM = "FocalLengthIn35mmFilm";
    public static final String TAG_FOCAL_PLANE_RESOLUTION_UNIT = "FocalPlaneResolutionUnit";
    public static final String TAG_FOCAL_PLANE_X_RESOLUTION = "FocalPlaneXResolution";
    public static final String TAG_FOCAL_PLANE_Y_RESOLUTION = "FocalPlaneYResolution";
    public static final String TAG_F_NUMBER = "FNumber";
    public static final String TAG_GAIN_CONTROL = "GainControl";
    public static final String TAG_GPS_ALTITUDE = "GPSAltitude";
    public static final String TAG_GPS_ALTITUDE_REF = "GPSAltitudeRef";
    public static final String TAG_GPS_AREA_INFORMATION = "GPSAreaInformation";
    public static final String TAG_GPS_DATESTAMP = "GPSDateStamp";
    public static final String TAG_GPS_DEST_BEARING = "GPSDestBearing";
    public static final String TAG_GPS_DEST_BEARING_REF = "GPSDestBearingRef";
    public static final String TAG_GPS_DEST_DISTANCE = "GPSDestDistance";
    public static final String TAG_GPS_DEST_DISTANCE_REF = "GPSDestDistanceRef";
    public static final String TAG_GPS_DEST_LATITUDE = "GPSDestLatitude";
    public static final String TAG_GPS_DEST_LATITUDE_REF = "GPSDestLatitudeRef";
    public static final String TAG_GPS_DEST_LONGITUDE = "GPSDestLongitude";
    public static final String TAG_GPS_DEST_LONGITUDE_REF = "GPSDestLongitudeRef";
    public static final String TAG_GPS_DIFFERENTIAL = "GPSDifferential";
    public static final String TAG_GPS_DOP = "GPSDOP";
    public static final String TAG_GPS_IMG_DIRECTION = "GPSImgDirection";
    public static final String TAG_GPS_IMG_DIRECTION_REF = "GPSImgDirectionRef";
    public static final String TAG_GPS_LATITUDE = "GPSLatitude";
    public static final String TAG_GPS_LATITUDE_REF = "GPSLatitudeRef";
    public static final String TAG_GPS_LONGITUDE = "GPSLongitude";
    public static final String TAG_GPS_LONGITUDE_REF = "GPSLongitudeRef";
    public static final String TAG_GPS_MAP_DATUM = "GPSMapDatum";
    public static final String TAG_GPS_MEASURE_MODE = "GPSMeasureMode";
    public static final String TAG_GPS_PROCESSING_METHOD = "GPSProcessingMethod";
    public static final String TAG_GPS_SATELLITES = "GPSSatellites";
    public static final String TAG_GPS_SPEED = "GPSSpeed";
    public static final String TAG_GPS_SPEED_REF = "GPSSpeedRef";
    public static final String TAG_GPS_STATUS = "GPSStatus";
    public static final String TAG_GPS_TIMESTAMP = "GPSTimeStamp";
    public static final String TAG_GPS_TRACK = "GPSTrack";
    public static final String TAG_GPS_TRACK_REF = "GPSTrackRef";
    public static final String TAG_GPS_VERSION_ID = "GPSVersionID";
    public static final String TAG_IMAGE_DESCRIPTION = "ImageDescription";
    public static final String TAG_IMAGE_LENGTH = "ImageLength";
    public static final String TAG_IMAGE_UNIQUE_ID = "ImageUniqueID";
    public static final String TAG_IMAGE_WIDTH = "ImageWidth";
    public static final String TAG_INTEROPERABILITY_INDEX = "InteroperabilityIndex";

2.读取图片属性

代码如下：

        try {
            ExifInterface exifInterface = new ExifInterface(imagePath);
            String datetime = exifInterface.getAttribute(ExifInterface.TAG_DATETIME);// 拍摄时间
            String deviceName = exifInterface.getAttribute(ExifInterface.TAG_MAKE);// 设备品牌
            String deviceModel = exifInterface.getAttribute(ExifInterface.TAG_MODEL); // 设备型号
            String latValue = exifInterface.getAttribute(ExifInterface.TAG_GPS_LATITUDE);
            String lngValue = exifInterface.getAttribute(ExifInterface.TAG_GPS_LONGITUDE);
            String latRef = exifInterface.getAttribute(ExifInterface.TAG_GPS_LATITUDE_REF);
            String lngRef = exifInterface.getAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF);
            if (latValue != null && latRef != null && lngValue != null && lngRef != null) {
                lat = convertRationalLatLonToFloat(latValue, latRef);
                lng = convertRationalLatLonToFloat(lngValue, lngRef);
            }
            
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

 private static float convertRationalLatLonToFloat(String rationalString, String ref) {
        String[] parts = rationalString.split(",");
        String[] pair;
        pair = parts[0].split("/");
        double degrees = Double.parseDouble(pair[0].trim())/ Double.parseDouble(pair[1].trim());

        pair = parts[1].split("/");
        double minutes = Double.parseDouble(pair[0].trim())/ Double.parseDouble(pair[1].trim());

        pair = parts[2].split("/");
        double seconds = Double.parseDouble(pair[0].trim())/ Double.parseDouble(pair[1].trim());

        double result = degrees + (minutes / 60.0) + (seconds / 3600.0);
        if ((ref.equals("S") || ref.equals("W"))) {
            return (float) -result;
        }
        return (float) result;
    }

这样就获取到了经纬度信息，然后通过经纬度获取具体地址信息。

3.经纬度解析,主要android类Geocoder

代码如下，两种方式都可以得到具体地址：

 private void getAddress(double latitude, double longitude) {
        
        Geocoder gc = new Geocoder(MainActivity.this, Locale.getDefault());
        try {
            List<Address> locationList = gc.getFromLocation(latitude, longitude, 1);
            if (locationList != null && locationList.size()>0) {
                Address address = locationList.get(0);
                String countryName = address.getCountryName(); 
                String countryCode = address.getCountryCode();
                String adminArea = address.getAdminArea(); 
                String locality = address.getLocality(); 
                String subAdminArea = address.getSubLocality(); 
                String featureName = address.getFeatureName(); 

                for (int i = 0; address.getAddressLine(i) != null; i++) {
                    String addressLine = address.getAddressLine(i);
                    System.out.println("addressLine=====" + addressLine);
                }

               /* String currentPosition = "countryName == " + countryName
                        + "\n" + "countryCode == " + countryCode
                        + "\n" + "adminArea == " + adminArea
                        + "\n" + "locality ==" + locality
                        + "\n" + "subAdminArea == " + subAdminArea
                        + "\n" + "featureName == " + featureName;
                System.out.println(currentPosition);*/
            }else{
                Toast.makeText(MainActivity.this,"无法获取地址",Toast.LENGTH_SHORT).show();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }