Add rotate support in Film Strip

Move the exif related code under src.com.android.camera.exif.
Refactor the member variables under LocalMediaData.java.
Refactor the LocalData to make sure they are immutables for thread safety.

bug:10367037

Change-Id: I0b8128a806fa9e777a87967b294555daadced1c5

1 files changed, 2407 insertions, 0 deletions

diff --git a/src/com/android/camera/exif/ExifInterface.java b/src/com/android/camera/exif/ExifInterface.java
new file mode 100644
index 000000000..340f19e1c
--- /dev/null
+++ b/src/com/android/camera/exif/ExifInterface.java
@@ -0,0 +1,2407 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.camera.exif;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.util.SparseIntArray;
+
+import java.io.BufferedInputStream;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.Closeable;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.RandomAccessFile;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.channels.FileChannel.MapMode;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Calendar;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import java.util.TimeZone;
+
+/**
+ * This class provides methods and constants for reading and writing jpeg file
+ * metadata. It contains a collection of ExifTags, and a collection of
+ * definitions for creating valid ExifTags. The collection of ExifTags can be
+ * updated by: reading new ones from a file, deleting or adding existing ones,
+ * or building new ExifTags from a tag definition. These ExifTags can be written
+ * to a valid jpeg image as exif metadata.
+ * <p>
+ * Each ExifTag has a tag ID (TID) and is stored in a specific image file
+ * directory (IFD) as specified by the exif standard. A tag definition can be
+ * looked up with a constant that is a combination of TID and IFD. This
+ * definition has information about the type, number of components, and valid
+ * IFDs for a tag.
+ *
+ * @see ExifTag
+ */
+public class ExifInterface {
+    public static final int TAG_NULL = -1;
+    public static final int IFD_NULL = -1;
+    public static final int DEFINITION_NULL = 0;
+
+    /**
+     * Tag constants for Jeita EXIF 2.2
+     */
+
+    // IFD 0
+    public static final int TAG_IMAGE_WIDTH =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0100);
+    public static final int TAG_IMAGE_LENGTH =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0101); // Image height
+    public static final int TAG_BITS_PER_SAMPLE =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0102);
+    public static final int TAG_COMPRESSION =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0103);
+    public static final int TAG_PHOTOMETRIC_INTERPRETATION =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0106);
+    public static final int TAG_IMAGE_DESCRIPTION =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x010E);
+    public static final int TAG_MAKE =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x010F);
+    public static final int TAG_MODEL =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0110);
+    public static final int TAG_STRIP_OFFSETS =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0111);
+    public static final int TAG_ORIENTATION =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0112);
+    public static final int TAG_SAMPLES_PER_PIXEL =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0115);
+    public static final int TAG_ROWS_PER_STRIP =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0116);
+    public static final int TAG_STRIP_BYTE_COUNTS =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0117);
+    public static final int TAG_X_RESOLUTION =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x011A);
+    public static final int TAG_Y_RESOLUTION =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x011B);
+    public static final int TAG_PLANAR_CONFIGURATION =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x011C);
+    public static final int TAG_RESOLUTION_UNIT =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0128);
+    public static final int TAG_TRANSFER_FUNCTION =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x012D);
+    public static final int TAG_SOFTWARE =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0131);
+    public static final int TAG_DATE_TIME =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0132);
+    public static final int TAG_ARTIST =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x013B);
+    public static final int TAG_WHITE_POINT =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x013E);
+    public static final int TAG_PRIMARY_CHROMATICITIES =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x013F);
+    public static final int TAG_Y_CB_CR_COEFFICIENTS =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0211);
+    public static final int TAG_Y_CB_CR_SUB_SAMPLING =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0212);
+    public static final int TAG_Y_CB_CR_POSITIONING =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0213);
+    public static final int TAG_REFERENCE_BLACK_WHITE =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x0214);
+    public static final int TAG_COPYRIGHT =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x8298);
+    public static final int TAG_EXIF_IFD =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x8769);
+    public static final int TAG_GPS_IFD =
+        defineTag(IfdId.TYPE_IFD_0, (short) 0x8825);
+    // IFD 1
+    public static final int TAG_JPEG_INTERCHANGE_FORMAT =
+        defineTag(IfdId.TYPE_IFD_1, (short) 0x0201);
+    public static final int TAG_JPEG_INTERCHANGE_FORMAT_LENGTH =
+        defineTag(IfdId.TYPE_IFD_1, (short) 0x0202);
+    // IFD Exif Tags
+    public static final int TAG_EXPOSURE_TIME =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x829A);
+    public static final int TAG_F_NUMBER =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x829D);
+    public static final int TAG_EXPOSURE_PROGRAM =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x8822);
+    public static final int TAG_SPECTRAL_SENSITIVITY =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x8824);
+    public static final int TAG_ISO_SPEED_RATINGS =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x8827);
+    public static final int TAG_OECF =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x8828);
+    public static final int TAG_EXIF_VERSION =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9000);
+    public static final int TAG_DATE_TIME_ORIGINAL =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9003);
+    public static final int TAG_DATE_TIME_DIGITIZED =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9004);
+    public static final int TAG_COMPONENTS_CONFIGURATION =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9101);
+    public static final int TAG_COMPRESSED_BITS_PER_PIXEL =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9102);
+    public static final int TAG_SHUTTER_SPEED_VALUE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9201);
+    public static final int TAG_APERTURE_VALUE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9202);
+    public static final int TAG_BRIGHTNESS_VALUE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9203);
+    public static final int TAG_EXPOSURE_BIAS_VALUE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9204);
+    public static final int TAG_MAX_APERTURE_VALUE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9205);
+    public static final int TAG_SUBJECT_DISTANCE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9206);
+    public static final int TAG_METERING_MODE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9207);
+    public static final int TAG_LIGHT_SOURCE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9208);
+    public static final int TAG_FLASH =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9209);
+    public static final int TAG_FOCAL_LENGTH =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x920A);
+    public static final int TAG_SUBJECT_AREA =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9214);
+    public static final int TAG_MAKER_NOTE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x927C);
+    public static final int TAG_USER_COMMENT =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9286);
+    public static final int TAG_SUB_SEC_TIME =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9290);
+    public static final int TAG_SUB_SEC_TIME_ORIGINAL =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9291);
+    public static final int TAG_SUB_SEC_TIME_DIGITIZED =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0x9292);
+    public static final int TAG_FLASHPIX_VERSION =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA000);
+    public static final int TAG_COLOR_SPACE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA001);
+    public static final int TAG_PIXEL_X_DIMENSION =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA002);
+    public static final int TAG_PIXEL_Y_DIMENSION =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA003);
+    public static final int TAG_RELATED_SOUND_FILE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA004);
+    public static final int TAG_INTEROPERABILITY_IFD =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA005);
+    public static final int TAG_FLASH_ENERGY =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA20B);
+    public static final int TAG_SPATIAL_FREQUENCY_RESPONSE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA20C);
+    public static final int TAG_FOCAL_PLANE_X_RESOLUTION =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA20E);
+    public static final int TAG_FOCAL_PLANE_Y_RESOLUTION =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA20F);
+    public static final int TAG_FOCAL_PLANE_RESOLUTION_UNIT =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA210);
+    public static final int TAG_SUBJECT_LOCATION =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA214);
+    public static final int TAG_EXPOSURE_INDEX =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA215);
+    public static final int TAG_SENSING_METHOD =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA217);
+    public static final int TAG_FILE_SOURCE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA300);
+    public static final int TAG_SCENE_TYPE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA301);
+    public static final int TAG_CFA_PATTERN =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA302);
+    public static final int TAG_CUSTOM_RENDERED =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA401);
+    public static final int TAG_EXPOSURE_MODE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA402);
+    public static final int TAG_WHITE_BALANCE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA403);
+    public static final int TAG_DIGITAL_ZOOM_RATIO =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA404);
+    public static final int TAG_FOCAL_LENGTH_IN_35_MM_FILE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA405);
+    public static final int TAG_SCENE_CAPTURE_TYPE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA406);
+    public static final int TAG_GAIN_CONTROL =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA407);
+    public static final int TAG_CONTRAST =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA408);
+    public static final int TAG_SATURATION =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA409);
+    public static final int TAG_SHARPNESS =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA40A);
+    public static final int TAG_DEVICE_SETTING_DESCRIPTION =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA40B);
+    public static final int TAG_SUBJECT_DISTANCE_RANGE =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA40C);
+    public static final int TAG_IMAGE_UNIQUE_ID =
+        defineTag(IfdId.TYPE_IFD_EXIF, (short) 0xA420);
+    // IFD GPS tags
+    public static final int TAG_GPS_VERSION_ID =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 0);
+    public static final int TAG_GPS_LATITUDE_REF =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 1);
+    public static final int TAG_GPS_LATITUDE =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 2);
+    public static final int TAG_GPS_LONGITUDE_REF =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 3);
+    public static final int TAG_GPS_LONGITUDE =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 4);
+    public static final int TAG_GPS_ALTITUDE_REF =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 5);
+    public static final int TAG_GPS_ALTITUDE =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 6);
+    public static final int TAG_GPS_TIME_STAMP =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 7);
+    public static final int TAG_GPS_SATTELLITES =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 8);
+    public static final int TAG_GPS_STATUS =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 9);
+    public static final int TAG_GPS_MEASURE_MODE =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 10);
+    public static final int TAG_GPS_DOP =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 11);
+    public static final int TAG_GPS_SPEED_REF =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 12);
+    public static final int TAG_GPS_SPEED =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 13);
+    public static final int TAG_GPS_TRACK_REF =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 14);
+    public static final int TAG_GPS_TRACK =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 15);
+    public static final int TAG_GPS_IMG_DIRECTION_REF =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 16);
+    public static final int TAG_GPS_IMG_DIRECTION =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 17);
+    public static final int TAG_GPS_MAP_DATUM =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 18);
+    public static final int TAG_GPS_DEST_LATITUDE_REF =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 19);
+    public static final int TAG_GPS_DEST_LATITUDE =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 20);
+    public static final int TAG_GPS_DEST_LONGITUDE_REF =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 21);
+    public static final int TAG_GPS_DEST_LONGITUDE =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 22);
+    public static final int TAG_GPS_DEST_BEARING_REF =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 23);
+    public static final int TAG_GPS_DEST_BEARING =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 24);
+    public static final int TAG_GPS_DEST_DISTANCE_REF =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 25);
+    public static final int TAG_GPS_DEST_DISTANCE =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 26);
+    public static final int TAG_GPS_PROCESSING_METHOD =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 27);
+    public static final int TAG_GPS_AREA_INFORMATION =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 28);
+    public static final int TAG_GPS_DATE_STAMP =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 29);
+    public static final int TAG_GPS_DIFFERENTIAL =
+        defineTag(IfdId.TYPE_IFD_GPS, (short) 30);
+    // IFD Interoperability tags
+    public static final int TAG_INTEROPERABILITY_INDEX =
+        defineTag(IfdId.TYPE_IFD_INTEROPERABILITY, (short) 1);
+
+    /**
+     * Tags that contain offset markers. These are included in the banned
+     * defines.
+     */
+    private static HashSet<Short> sOffsetTags = new HashSet<Short>();
+    static {
+        sOffsetTags.add(getTrueTagKey(TAG_GPS_IFD));
+        sOffsetTags.add(getTrueTagKey(TAG_EXIF_IFD));
+        sOffsetTags.add(getTrueTagKey(TAG_JPEG_INTERCHANGE_FORMAT));
+        sOffsetTags.add(getTrueTagKey(TAG_INTEROPERABILITY_IFD));
+        sOffsetTags.add(getTrueTagKey(TAG_STRIP_OFFSETS));
+    }
+
+    /**
+     * Tags with definitions that cannot be overridden (banned defines).
+     */
+    protected static HashSet<Short> sBannedDefines = new HashSet<Short>(sOffsetTags);
+    static {
+        sBannedDefines.add(getTrueTagKey(TAG_NULL));
+        sBannedDefines.add(getTrueTagKey(TAG_JPEG_INTERCHANGE_FORMAT_LENGTH));
+        sBannedDefines.add(getTrueTagKey(TAG_STRIP_BYTE_COUNTS));
+    }
+
+    /**
+     * Returns the constant representing a tag with a given TID and default IFD.
+     */
+    public static int defineTag(int ifdId, short tagId) {
+        return (tagId & 0x0000ffff) | (ifdId << 16);
+    }
+
+    /**
+     * Returns the TID for a tag constant.
+     */
+    public static short getTrueTagKey(int tag) {
+        // Truncate
+        return (short) tag;
+    }
+
+    /**
+     * Returns the default IFD for a tag constant.
+     */
+    public static int getTrueIfd(int tag) {
+        return tag >>> 16;
+    }
+
+    /**
+     * Constants for {@link TAG_ORIENTATION}. They can be interpreted as
+     * follows:
+     * <ul>
+     * <li>TOP_LEFT is the normal orientation.</li>
+     * <li>TOP_RIGHT is a left-right mirror.</li>
+     * <li>BOTTOM_LEFT is a 180 degree rotation.</li>
+     * <li>BOTTOM_RIGHT is a top-bottom mirror.</li>
+     * <li>LEFT_TOP is mirrored about the top-left<->bottom-right axis.</li>
+     * <li>RIGHT_TOP is a 90 degree clockwise rotation.</li>
+     * <li>LEFT_BOTTOM is mirrored about the top-right<->bottom-left axis.</li>
+     * <li>RIGHT_BOTTOM is a 270 degree clockwise rotation.</li>
+     * </ul>
+     */
+    public static interface Orientation {
+        public static final short TOP_LEFT = 1;
+        public static final short TOP_RIGHT = 2;
+        public static final short BOTTOM_LEFT = 3;
+        public static final short BOTTOM_RIGHT = 4;
+        public static final short LEFT_TOP = 5;
+        public static final short RIGHT_TOP = 6;
+        public static final short LEFT_BOTTOM = 7;
+        public static final short RIGHT_BOTTOM = 8;
+    }
+
+    /**
+     * Constants for {@link TAG_Y_CB_CR_POSITIONING}
+     */
+    public static interface YCbCrPositioning {
+        public static final short CENTERED = 1;
+        public static final short CO_SITED = 2;
+    }
+
+    /**
+     * Constants for {@link TAG_COMPRESSION}
+     */
+    public static interface Compression {
+        public static final short UNCOMPRESSION = 1;
+        public static final short JPEG = 6;
+    }
+
+    /**
+     * Constants for {@link TAG_RESOLUTION_UNIT}
+     */
+    public static interface ResolutionUnit {
+        public static final short INCHES = 2;
+        public static final short CENTIMETERS = 3;
+    }
+
+    /**
+     * Constants for {@link TAG_PHOTOMETRIC_INTERPRETATION}
+     */
+    public static interface PhotometricInterpretation {
+        public static final short RGB = 2;
+        public static final short YCBCR = 6;
+    }
+
+    /**
+     * Constants for {@link TAG_PLANAR_CONFIGURATION}
+     */
+    public static interface PlanarConfiguration {
+        public static final short CHUNKY = 1;
+        public static final short PLANAR = 2;
+    }
+
+    /**
+     * Constants for {@link TAG_EXPOSURE_PROGRAM}
+     */
+    public static interface ExposureProgram {
+        public static final short NOT_DEFINED = 0;
+        public static final short MANUAL = 1;
+        public static final short NORMAL_PROGRAM = 2;
+        public static final short APERTURE_PRIORITY = 3;
+        public static final short SHUTTER_PRIORITY = 4;
+        public static final short CREATIVE_PROGRAM = 5;
+        public static final short ACTION_PROGRAM = 6;
+        public static final short PROTRAIT_MODE = 7;
+        public static final short LANDSCAPE_MODE = 8;
+    }
+
+    /**
+     * Constants for {@link TAG_METERING_MODE}
+     */
+    public static interface MeteringMode {
+        public static final short UNKNOWN = 0;
+        public static final short AVERAGE = 1;
+        public static final short CENTER_WEIGHTED_AVERAGE = 2;
+        public static final short SPOT = 3;
+        public static final short MULTISPOT = 4;
+        public static final short PATTERN = 5;
+        public static final short PARTAIL = 6;
+        public static final short OTHER = 255;
+    }
+
+    /**
+     * Constants for {@link TAG_FLASH} As the definition in Jeita EXIF 2.2
+     * standard, we can treat this constant as bitwise flag.
+     * <p>
+     * e.g.
+     * <p>
+     * short flash = FIRED | RETURN_STROBE_RETURN_LIGHT_DETECTED |
+     * MODE_AUTO_MODE
+     */
+    public static interface Flash {
+        // LSB
+        public static final short DID_NOT_FIRED = 0;
+        public static final short FIRED = 1;
+        // 1st~2nd bits
+        public static final short RETURN_NO_STROBE_RETURN_DETECTION_FUNCTION = 0 << 1;
+        public static final short RETURN_STROBE_RETURN_LIGHT_NOT_DETECTED = 2 << 1;
+        public static final short RETURN_STROBE_RETURN_LIGHT_DETECTED = 3 << 1;
+        // 3rd~4th bits
+        public static final short MODE_UNKNOWN = 0 << 3;
+        public static final short MODE_COMPULSORY_FLASH_FIRING = 1 << 3;
+        public static final short MODE_COMPULSORY_FLASH_SUPPRESSION = 2 << 3;
+        public static final short MODE_AUTO_MODE = 3 << 3;
+        // 5th bit
+        public static final short FUNCTION_PRESENT = 0 << 5;
+        public static final short FUNCTION_NO_FUNCTION = 1 << 5;
+        // 6th bit
+        public static final short RED_EYE_REDUCTION_NO_OR_UNKNOWN = 0 << 6;
+        public static final short RED_EYE_REDUCTION_SUPPORT = 1 << 6;
+    }
+
+    /**
+     * Constants for {@link TAG_COLOR_SPACE}
+     */
+    public static interface ColorSpace {
+        public static final short SRGB = 1;
+        public static final short UNCALIBRATED = (short) 0xFFFF;
+    }
+
+    /**
+     * Constants for {@link TAG_EXPOSURE_MODE}
+     */
+    public static interface ExposureMode {
+        public static final short AUTO_EXPOSURE = 0;
+        public static final short MANUAL_EXPOSURE = 1;
+        public static final short AUTO_BRACKET = 2;
+    }
+
+    /**
+     * Constants for {@link TAG_WHITE_BALANCE}
+     */
+    public static interface WhiteBalance {
+        public static final short AUTO = 0;
+        public static final short MANUAL = 1;
+    }
+
+    /**
+     * Constants for {@link TAG_SCENE_CAPTURE_TYPE}
+     */
+    public static interface SceneCapture {
+        public static final short STANDARD = 0;
+        public static final short LANDSCAPE = 1;
+        public static final short PROTRAIT = 2;
+        public static final short NIGHT_SCENE = 3;
+    }
+
+    /**
+     * Constants for {@link TAG_COMPONENTS_CONFIGURATION}
+     */
+    public static interface ComponentsConfiguration {
+        public static final short NOT_EXIST = 0;
+        public static final short Y = 1;
+        public static final short CB = 2;
+        public static final short CR = 3;
+        public static final short R = 4;
+        public static final short G = 5;
+        public static final short B = 6;
+    }
+
+    /**
+     * Constants for {@link TAG_LIGHT_SOURCE}
+     */
+    public static interface LightSource {
+        public static final short UNKNOWN = 0;
+        public static final short DAYLIGHT = 1;
+        public static final short FLUORESCENT = 2;
+        public static final short TUNGSTEN = 3;
+        public static final short FLASH = 4;
+        public static final short FINE_WEATHER = 9;
+        public static final short CLOUDY_WEATHER = 10;
+        public static final short SHADE = 11;
+        public static final short DAYLIGHT_FLUORESCENT = 12;
+        public static final short DAY_WHITE_FLUORESCENT = 13;
+        public static final short COOL_WHITE_FLUORESCENT = 14;
+        public static final short WHITE_FLUORESCENT = 15;
+        public static final short STANDARD_LIGHT_A = 17;
+        public static final short STANDARD_LIGHT_B = 18;
+        public static final short STANDARD_LIGHT_C = 19;
+        public static final short D55 = 20;
+        public static final short D65 = 21;
+        public static final short D75 = 22;
+        public static final short D50 = 23;
+        public static final short ISO_STUDIO_TUNGSTEN = 24;
+        public static final short OTHER = 255;
+    }
+
+    /**
+     * Constants for {@link TAG_SENSING_METHOD}
+     */
+    public static interface SensingMethod {
+        public static final short NOT_DEFINED = 1;
+        public static final short ONE_CHIP_COLOR = 2;
+        public static final short TWO_CHIP_COLOR = 3;
+        public static final short THREE_CHIP_COLOR = 4;
+        public static final short COLOR_SEQUENTIAL_AREA = 5;
+        public static final short TRILINEAR = 7;
+        public static final short COLOR_SEQUENTIAL_LINEAR = 8;
+    }
+
+    /**
+     * Constants for {@link TAG_FILE_SOURCE}
+     */
+    public static interface FileSource {
+        public static final short DSC = 3;
+    }
+
+    /**
+     * Constants for {@link TAG_SCENE_TYPE}
+     */
+    public static interface SceneType {
+        public static final short DIRECT_PHOTOGRAPHED = 1;
+    }
+
+    /**
+     * Constants for {@link TAG_GAIN_CONTROL}
+     */
+    public static interface GainControl {
+        public static final short NONE = 0;
+        public static final short LOW_UP = 1;
+        public static final short HIGH_UP = 2;
+        public static final short LOW_DOWN = 3;
+        public static final short HIGH_DOWN = 4;
+    }
+
+    /**
+     * Constants for {@link TAG_CONTRAST}
+     */
+    public static interface Contrast {
+        public static final short NORMAL = 0;
+        public static final short SOFT = 1;
+        public static final short HARD = 2;
+    }
+
+    /**
+     * Constants for {@link TAG_SATURATION}
+     */
+    public static interface Saturation {
+        public static final short NORMAL = 0;
+        public static final short LOW = 1;
+        public static final short HIGH = 2;
+    }
+
+    /**
+     * Constants for {@link TAG_SHARPNESS}
+     */
+    public static interface Sharpness {
+        public static final short NORMAL = 0;
+        public static final short SOFT = 1;
+        public static final short HARD = 2;
+    }
+
+    /**
+     * Constants for {@link TAG_SUBJECT_DISTANCE}
+     */
+    public static interface SubjectDistance {
+        public static final short UNKNOWN = 0;
+        public static final short MACRO = 1;
+        public static final short CLOSE_VIEW = 2;
+        public static final short DISTANT_VIEW = 3;
+    }
+
+    /**
+     * Constants for {@link TAG_GPS_LATITUDE_REF},
+     * {@link TAG_GPS_DEST_LATITUDE_REF}
+     */
+    public static interface GpsLatitudeRef {
+        public static final String NORTH = "N";
+        public static final String SOUTH = "S";
+    }
+
+    /**
+     * Constants for {@link TAG_GPS_LONGITUDE_REF},
+     * {@link TAG_GPS_DEST_LONGITUDE_REF}
+     */
+    public static interface GpsLongitudeRef {
+        public static final String EAST = "E";
+        public static final String WEST = "W";
+    }
+
+    /**
+     * Constants for {@link TAG_GPS_ALTITUDE_REF}
+     */
+    public static interface GpsAltitudeRef {
+        public static final short SEA_LEVEL = 0;
+        public static final short SEA_LEVEL_NEGATIVE = 1;
+    }
+
+    /**
+     * Constants for {@link TAG_GPS_STATUS}
+     */
+    public static interface GpsStatus {
+        public static final String IN_PROGRESS = "A";
+        public static final String INTEROPERABILITY = "V";
+    }
+
+    /**
+     * Constants for {@link TAG_GPS_MEASURE_MODE}
+     */
+    public static interface GpsMeasureMode {
+        public static final String MODE_2_DIMENSIONAL = "2";
+        public static final String MODE_3_DIMENSIONAL = "3";
+    }
+
+    /**
+     * Constants for {@link TAG_GPS_SPEED_REF},
+     * {@link TAG_GPS_DEST_DISTANCE_REF}
+     */
+    public static interface GpsSpeedRef {
+        public static final String KILOMETERS = "K";
+        public static final String MILES = "M";
+        public static final String KNOTS = "N";
+    }
+
+    /**
+     * Constants for {@link TAG_GPS_TRACK_REF},
+     * {@link TAG_GPS_IMG_DIRECTION_REF}, {@link TAG_GPS_DEST_BEARING_REF}
+     */
+    public static interface GpsTrackRef {
+        public static final String TRUE_DIRECTION = "T";
+        public static final String MAGNETIC_DIRECTION = "M";
+    }
+
+    /**
+     * Constants for {@link TAG_GPS_DIFFERENTIAL}
+     */
+    public static interface GpsDifferential {
+        public static final short WITHOUT_DIFFERENTIAL_CORRECTION = 0;
+        public static final short DIFFERENTIAL_CORRECTION_APPLIED = 1;
+    }
+
+    private static final String NULL_ARGUMENT_STRING = "Argument is null";
+    private ExifData mData = new ExifData(DEFAULT_BYTE_ORDER);
+    public static final ByteOrder DEFAULT_BYTE_ORDER = ByteOrder.BIG_ENDIAN;
+
+    public ExifInterface() {
+        mGPSDateStampFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+    }
+
+    /**
+     * Reads the exif tags from a byte array, clearing this ExifInterface
+     * object's existing exif tags.
+     *
+     * @param jpeg a byte array containing a jpeg compressed image.
+     * @throws IOException
+     */
+    public void readExif(byte[] jpeg) throws IOException {
+        readExif(new ByteArrayInputStream(jpeg));
+    }
+
+    /**
+     * Reads the exif tags from an InputStream, clearing this ExifInterface
+     * object's existing exif tags.
+     *
+     * @param inStream an InputStream containing a jpeg compressed image.
+     * @throws IOException
+     */
+    public void readExif(InputStream inStream) throws IOException {
+        if (inStream == null) {
+            throw new IllegalArgumentException(NULL_ARGUMENT_STRING);
+        }
+        ExifData d = null;
+        try {
+            d = new ExifReader(this).read(inStream);
+        } catch (ExifInvalidFormatException e) {
+            throw new IOException("Invalid exif format : " + e);
+        }
+        mData = d;
+    }
+
+    /**
+     * Reads the exif tags from a file, clearing this ExifInterface object's
+     * existing exif tags.
+     *
+     * @param inFileName a string representing the filepath to jpeg file.
+     * @throws FileNotFoundException
+     * @throws IOException
+     */
+    public void readExif(String inFileName) throws FileNotFoundException, IOException {
+        if (inFileName == null) {
+            throw new IllegalArgumentException(NULL_ARGUMENT_STRING);
+        }
+        InputStream is = null;
+        try {
+            is = new BufferedInputStream(new FileInputStream(inFileName));
+            readExif(is);
+        } catch (IOException e) {
+            closeSilently(is);
+            throw e;
+        }
+        is.close();
+    }
+
+    /**
+     * Sets the exif tags, clearing this ExifInterface object's existing exif
+     * tags.
+     *
+     * @param tags a collection of exif tags to set.
+     */
+    public void setExif(Collection<ExifTag> tags) {
+        clearExif();
+        setTags(tags);
+    }
+
+    /**
+     * Clears this ExifInterface object's existing exif tags.
+     */
+    public void clearExif() {
+        mData = new ExifData(DEFAULT_BYTE_ORDER);
+    }
+
+    /**
+     * Writes the tags from this ExifInterface object into a jpeg image,
+     * removing prior exif tags.
+     *
+     * @param jpeg a byte array containing a jpeg compressed image.
+     * @param exifOutStream an OutputStream to which the jpeg image with added
+     *            exif tags will be written.
+     * @throws IOException
+     */
+    public void writeExif(byte[] jpeg, OutputStream exifOutStream) throws IOException {
+        if (jpeg == null || exifOutStream == null) {
+            throw new IllegalArgumentException(NULL_ARGUMENT_STRING);
+        }
+        OutputStream s = getExifWriterStream(exifOutStream);
+        s.write(jpeg, 0, jpeg.length);
+        s.flush();
+    }
+
+    /**
+     * Writes the tags from this ExifInterface object into a jpeg compressed
+     * bitmap, removing prior exif tags.
+     *
+     * @param bmap a bitmap to compress and write exif into.
+     * @param exifOutStream the OutputStream to which the jpeg image with added
+     *            exif tags will be written.
+     * @throws IOException
+     */
+    public void writeExif(Bitmap bmap, OutputStream exifOutStream) throws IOException {
+        if (bmap == null || exifOutStream == null) {
+            throw new IllegalArgumentException(NULL_ARGUMENT_STRING);
+        }
+        OutputStream s = getExifWriterStream(exifOutStream);
+        bmap.compress(Bitmap.CompressFormat.JPEG, 90, s);
+        s.flush();
+    }
+
+    /**
+     * Writes the tags from this ExifInterface object into a jpeg stream,
+     * removing prior exif tags.
+     *
+     * @param jpegStream an InputStream containing a jpeg compressed image.
+     * @param exifOutStream an OutputStream to which the jpeg image with added
+     *            exif tags will be written.
+     * @throws IOException
+     */
+    public void writeExif(InputStream jpegStream, OutputStream exifOutStream) throws IOException {
+        if (jpegStream == null || exifOutStream == null) {
+            throw new IllegalArgumentException(NULL_ARGUMENT_STRING);
+        }
+        OutputStream s = getExifWriterStream(exifOutStream);
+        doExifStreamIO(jpegStream, s);
+        s.flush();
+    }
+
+    /**
+     * Writes the tags from this ExifInterface object into a jpeg image,
+     * removing prior exif tags.
+     *
+     * @param jpeg a byte array containing a jpeg compressed image.
+     * @param exifOutFileName a String containing the filepath to which the jpeg
+     *            image with added exif tags will be written.
+     * @throws FileNotFoundException
+     * @throws IOException
+     */
+    public void writeExif(byte[] jpeg, String exifOutFileName) throws FileNotFoundException,
+            IOException {
+        if (jpeg == null || exifOutFileName == null) {
+            throw new IllegalArgumentException(NULL_ARGUMENT_STRING);
+        }
+        OutputStream s = null;
+        try {
+            s = getExifWriterStream(exifOutFileName);
+            s.write(jpeg, 0, jpeg.length);
+            s.flush();
+        } catch (IOException e) {
+            closeSilently(s);
+            throw e;
+        }
+        s.close();
+    }
+
+    /**
+     * Writes the tags from this ExifInterface object into a jpeg compressed
+     * bitmap, removing prior exif tags.
+     *
+     * @param bmap a bitmap to compress and write exif into.
+     * @param exifOutFileName a String containing the filepath to which the jpeg
+     *            image with added exif tags will be written.
+     * @throws FileNotFoundException
+     * @throws IOException
+     */
+    public void writeExif(Bitmap bmap, String exifOutFileName) throws FileNotFoundException,
+            IOException {
+        if (bmap == null || exifOutFileName == null) {
+            throw new IllegalArgumentException(NULL_ARGUMENT_STRING);
+        }
+        OutputStream s = null;
+        try {
+            s = getExifWriterStream(exifOutFileName);
+            bmap.compress(Bitmap.CompressFormat.JPEG, 90, s);
+            s.flush();
+        } catch (IOException e) {
+            closeSilently(s);
+            throw e;
+        }
+        s.close();
+    }
+
+    /**
+     * Writes the tags from this ExifInterface object into a jpeg stream,
+     * removing prior exif tags.
+     *
+     * @param jpegStream an InputStream containing a jpeg compressed image.
+     * @param exifOutFileName a String containing the filepath to which the jpeg
+     *            image with added exif tags will be written.
+     * @throws FileNotFoundException
+     * @throws IOException
+     */
+    public void writeExif(InputStream jpegStream, String exifOutFileName)
+            throws FileNotFoundException, IOException {
+        if (jpegStream == null || exifOutFileName == null) {
+            throw new IllegalArgumentException(NULL_ARGUMENT_STRING);
+        }
+        OutputStream s = null;
+        try {
+            s = getExifWriterStream(exifOutFileName);
+            doExifStreamIO(jpegStream, s);
+            s.flush();
+        } catch (IOException e) {
+            closeSilently(s);
+            throw e;
+        }
+        s.close();
+    }
+
+    /**
+     * Writes the tags from this ExifInterface object into a jpeg file, removing
+     * prior exif tags.
+     *
+     * @param jpegFileName a String containing the filepath for a jpeg file.
+     * @param exifOutFileName a String containing the filepath to which the jpeg
+     *            image with added exif tags will be written.
+     * @throws FileNotFoundException
+     * @throws IOException
+     */
+    public void writeExif(String jpegFileName, String exifOutFileName)
+            throws FileNotFoundException, IOException {
+        if (jpegFileName == null || exifOutFileName == null) {
+            throw new IllegalArgumentException(NULL_ARGUMENT_STRING);
+        }
+        InputStream is = null;
+        try {
+            is = new FileInputStream(jpegFileName);
+            writeExif(is, exifOutFileName);
+        } catch (IOException e) {
+            closeSilently(is);
+            throw e;
+        }
+        is.close();
+    }
+
+    /**
+     * Wraps an OutputStream object with an ExifOutputStream. Exif tags in this
+     * ExifInterface object will be added to a jpeg image written to this
+     * stream, removing prior exif tags. Other methods of this ExifInterface
+     * object should not be called until the returned OutputStream has been
+     * closed.
+     *
+     * @param outStream an OutputStream to wrap.
+     * @return an OutputStream that wraps the outStream parameter, and adds exif
+     *         metadata. A jpeg image should be written to this stream.
+     */
+    public OutputStream getExifWriterStream(OutputStream outStream) {
+        if (outStream == null) {
+            throw new IllegalArgumentException(NULL_ARGUMENT_STRING);
+        }
+        ExifOutputStream eos = new ExifOutputStream(outStream, this);
+        eos.setExifData(mData);
+        return eos;
+    }
+
+    /**
+     * Returns an OutputStream object that writes to a file. Exif tags in this
+     * ExifInterface object will be added to a jpeg image written to this
+     * stream, removing prior exif tags. Other methods of this ExifInterface
+     * object should not be called until the returned OutputStream has been
+     * closed.
+     *
+     * @param exifOutFileName an String containing a filepath for a jpeg file.
+     * @return an OutputStream that writes to the exifOutFileName file, and adds
+     *         exif metadata. A jpeg image should be written to this stream.
+     * @throws FileNotFoundException
+     */
+    public OutputStream getExifWriterStream(String exifOutFileName) throws FileNotFoundException {
+        if (exifOutFileName == null) {
+            throw new IllegalArgumentException(NULL_ARGUMENT_STRING);
+        }
+        OutputStream out = null;
+        try {
+            out = new FileOutputStream(exifOutFileName);
+        } catch (FileNotFoundException e) {
+            closeSilently(out);
+            throw e;
+        }
+        return getExifWriterStream(out);
+    }
+
+    /**
+     * Attempts to do an in-place rewrite the exif metadata in a file for the
+     * given tags. If tags do not exist or do not have the same size as the
+     * existing exif tags, this method will fail.
+     *
+     * @param filename a String containing a filepath for a jpeg file with exif
+     *            tags to rewrite.
+     * @param tags tags that will be written into the jpeg file over existing
+     *            tags if possible.
+     * @return true if success, false if could not overwrite. If false, no
+     *         changes are made to the file.
+     * @throws FileNotFoundException
+     * @throws IOException
+     */
+    public boolean rewriteExif(String filename, Collection<ExifTag> tags)
+            throws FileNotFoundException, IOException {
+        RandomAccessFile file = null;
+        InputStream is = null;
+        boolean ret;
+        try {
+            File temp = new File(filename);
+            is = new BufferedInputStream(new FileInputStream(temp));
+
+            // Parse beginning of APP1 in exif to find size of exif header.
+            ExifParser parser = null;
+            try {
+                parser = ExifParser.parse(is, this);
+            } catch (ExifInvalidFormatException e) {
+                throw new IOException("Invalid exif format : ", e);
+            }
+            long exifSize = parser.getOffsetToExifEndFromSOF();
+
+            // Free up resources
+            is.close();
+            is = null;
+
+            // Open file for memory mapping.
+            file = new RandomAccessFile(temp, "rw");
+            long fileLength = file.length();
+            if (fileLength < exifSize) {
+                throw new IOException("Filesize changed during operation");
+            }
+
+            // Map only exif header into memory.
+            ByteBuffer buf = file.getChannel().map(MapMode.READ_WRITE, 0, exifSize);
+
+            // Attempt to overwrite tag values without changing lengths (avoids
+            // file copy).
+            ret = rewriteExif(buf, tags);
+        } catch (IOException e) {
+            closeSilently(file);
+            throw e;
+        } finally {
+            closeSilently(is);
+        }
+        file.close();
+        return ret;
+    }
+
+    /**
+     * Attempts to do an in-place rewrite the exif metadata in a ByteBuffer for
+     * the given tags. If tags do not exist or do not have the same size as the
+     * existing exif tags, this method will fail.
+     *
+     * @param buf a ByteBuffer containing a jpeg file with existing exif tags to
+     *            rewrite.
+     * @param tags tags that will be written into the jpeg ByteBuffer over
+     *            existing tags if possible.
+     * @return true if success, false if could not overwrite. If false, no
+     *         changes are made to the ByteBuffer.
+     * @throws IOException
+     */
+    public boolean rewriteExif(ByteBuffer buf, Collection<ExifTag> tags) throws IOException {
+        ExifModifier mod = null;
+        try {
+            mod = new ExifModifier(buf, this);
+            for (ExifTag t : tags) {
+                mod.modifyTag(t);
+            }
+            return mod.commit();
+        } catch (ExifInvalidFormatException e) {
+            throw new IOException("Invalid exif format : " + e);
+        }
+    }
+
+    /**
+     * Attempts to do an in-place rewrite of the exif metadata. If this fails,
+     * fall back to overwriting file. This preserves tags that are not being
+     * rewritten.
+     *
+     * @param filename a String containing a filepath for a jpeg file.
+     * @param tags tags that will be written into the jpeg file over existing
+     *            tags if possible.
+     * @throws FileNotFoundException
+     * @throws IOException
+     * @see #rewriteExif
+     */
+    public void forceRewriteExif(String filename, Collection<ExifTag> tags)
+            throws FileNotFoundException,
+            IOException {
+        // Attempt in-place write
+        if (!rewriteExif(filename, tags)) {
+            // Fall back to doing a copy
+            ExifData tempData = mData;
+            mData = new ExifData(DEFAULT_BYTE_ORDER);
+            FileInputStream is = null;
+            ByteArrayOutputStream bytes = null;
+            try {
+                is = new FileInputStream(filename);
+                bytes = new ByteArrayOutputStream();
+                doExifStreamIO(is, bytes);
+                byte[] imageBytes = bytes.toByteArray();
+                readExif(imageBytes);
+                setTags(tags);
+                writeExif(imageBytes, filename);
+            } catch (IOException e) {
+                closeSilently(is);
+                throw e;
+            } finally {
+                is.close();
+                // Prevent clobbering of mData
+                mData = tempData;
+            }
+        }
+    }
+
+    /**
+     * Attempts to do an in-place rewrite of the exif metadata using the tags in
+     * this ExifInterface object. If this fails, fall back to overwriting file.
+     * This preserves tags that are not being rewritten.
+     *
+     * @param filename a String containing a filepath for a jpeg file.
+     * @throws FileNotFoundException
+     * @throws IOException
+     * @see #rewriteExif
+     */
+    public void forceRewriteExif(String filename) throws FileNotFoundException, IOException {
+        forceRewriteExif(filename, getAllTags());
+    }
+
+    /**
+     * Get the exif tags in this ExifInterface object or null if none exist.
+     *
+     * @return a List of {@link ExifTag}s.
+     */
+    public List<ExifTag> getAllTags() {
+        return mData.getAllTags();
+    }
+
+    /**
+     * Returns a list of ExifTags that share a TID (which can be obtained by
+     * calling {@link #getTrueTagKey} on a defined tag constant) or null if none
+     * exist.
+     *
+     * @param tagId a TID as defined in the exif standard (or with
+     *            {@link #defineTag}).
+     * @return a List of {@link ExifTag}s.
+     */
+    public List<ExifTag> getTagsForTagId(short tagId) {
+        return mData.getAllTagsForTagId(tagId);
+    }
+
+    /**
+     * Returns a list of ExifTags that share an IFD (which can be obtained by
+     * calling {@link #getTrueIFD} on a defined tag constant) or null if none
+     * exist.
+     *
+     * @param ifdId an IFD as defined in the exif standard (or with
+     *            {@link #defineTag}).
+     * @return a List of {@link ExifTag}s.
+     */
+    public List<ExifTag> getTagsForIfdId(int ifdId) {
+        return mData.getAllTagsForIfd(ifdId);
+    }
+
+    /**
+     * Gets an ExifTag for an IFD other than the tag's default.
+     *
+     * @see #getTag
+     */
+    public ExifTag getTag(int tagId, int ifdId) {
+        if (!ExifTag.isValidIfd(ifdId)) {
+            return null;
+        }
+        return mData.getTag(getTrueTagKey(tagId), ifdId);
+    }
+
+    /**
+     * Returns the ExifTag in that tag's default IFD for a defined tag constant
+     * or null if none exists.
+     *
+     * @param tagId a defined tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @return an {@link ExifTag} or null if none exists.
+     */
+    public ExifTag getTag(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return getTag(tagId, ifdId);
+    }
+
+    /**
+     * Gets a tag value for an IFD other than the tag's default.
+     *
+     * @see #getTagValue
+     */
+    public Object getTagValue(int tagId, int ifdId) {
+        ExifTag t = getTag(tagId, ifdId);
+        return (t == null) ? null : t.getValue();
+    }
+
+    /**
+     * Returns the value of the ExifTag in that tag's default IFD for a defined
+     * tag constant or null if none exists or the value could not be cast into
+     * the return type.
+     *
+     * @param tagId a defined tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @return the value of the ExifTag or null if none exists.
+     */
+    public Object getTagValue(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return getTagValue(tagId, ifdId);
+    }
+
+    /*
+     * Getter methods that are similar to getTagValue. Null is returned if the
+     * tag value cannot be cast into the return type.
+     */
+
+    /**
+     * @see #getTagValue
+     */
+    public String getTagStringValue(int tagId, int ifdId) {
+        ExifTag t = getTag(tagId, ifdId);
+        if (t == null) {
+            return null;
+        }
+        return t.getValueAsString();
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public String getTagStringValue(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return getTagStringValue(tagId, ifdId);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public Long getTagLongValue(int tagId, int ifdId) {
+        long[] l = getTagLongValues(tagId, ifdId);
+        if (l == null || l.length <= 0) {
+            return null;
+        }
+        return new Long(l[0]);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public Long getTagLongValue(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return getTagLongValue(tagId, ifdId);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public Integer getTagIntValue(int tagId, int ifdId) {
+        int[] l = getTagIntValues(tagId, ifdId);
+        if (l == null || l.length <= 0) {
+            return null;
+        }
+        return new Integer(l[0]);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public Integer getTagIntValue(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return getTagIntValue(tagId, ifdId);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public Byte getTagByteValue(int tagId, int ifdId) {
+        byte[] l = getTagByteValues(tagId, ifdId);
+        if (l == null || l.length <= 0) {
+            return null;
+        }
+        return new Byte(l[0]);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public Byte getTagByteValue(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return getTagByteValue(tagId, ifdId);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public Rational getTagRationalValue(int tagId, int ifdId) {
+        Rational[] l = getTagRationalValues(tagId, ifdId);
+        if (l == null || l.length == 0) {
+            return null;
+        }
+        return new Rational(l[0]);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public Rational getTagRationalValue(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return getTagRationalValue(tagId, ifdId);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public long[] getTagLongValues(int tagId, int ifdId) {
+        ExifTag t = getTag(tagId, ifdId);
+        if (t == null) {
+            return null;
+        }
+        return t.getValueAsLongs();
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public long[] getTagLongValues(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return getTagLongValues(tagId, ifdId);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public int[] getTagIntValues(int tagId, int ifdId) {
+        ExifTag t = getTag(tagId, ifdId);
+        if (t == null) {
+            return null;
+        }
+        return t.getValueAsInts();
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public int[] getTagIntValues(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return getTagIntValues(tagId, ifdId);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public byte[] getTagByteValues(int tagId, int ifdId) {
+        ExifTag t = getTag(tagId, ifdId);
+        if (t == null) {
+            return null;
+        }
+        return t.getValueAsBytes();
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public byte[] getTagByteValues(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return getTagByteValues(tagId, ifdId);
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public Rational[] getTagRationalValues(int tagId, int ifdId) {
+        ExifTag t = getTag(tagId, ifdId);
+        if (t == null) {
+            return null;
+        }
+        return t.getValueAsRationals();
+    }
+
+    /**
+     * @see #getTagValue
+     */
+    public Rational[] getTagRationalValues(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return getTagRationalValues(tagId, ifdId);
+    }
+
+    /**
+     * Checks whether a tag has a defined number of elements.
+     *
+     * @param tagId a defined tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @return true if the tag has a defined number of elements.
+     */
+    public boolean isTagCountDefined(int tagId) {
+        int info = getTagInfo().get(tagId);
+        // No value in info can be zero, as all tags have a non-zero type
+        if (info == 0) {
+            return false;
+        }
+        return getComponentCountFromInfo(info) != ExifTag.SIZE_UNDEFINED;
+    }
+
+    /**
+     * Gets the defined number of elements for a tag.
+     *
+     * @param tagId a defined tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @return the number of elements or {@link ExifTag#SIZE_UNDEFINED} if the
+     *         tag or the number of elements is not defined.
+     */
+    public int getDefinedTagCount(int tagId) {
+        int info = getTagInfo().get(tagId);
+        if (info == 0) {
+            return ExifTag.SIZE_UNDEFINED;
+        }
+        return getComponentCountFromInfo(info);
+    }
+
+    /**
+     * Gets the number of elements for an ExifTag in a given IFD.
+     *
+     * @param tagId a defined tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @param ifdId the IFD containing the ExifTag to check.
+     * @return the number of elements in the ExifTag, if the tag's size is
+     *         undefined this will return the actual number of elements that is
+     *         in the ExifTag's value.
+     */
+    public int getActualTagCount(int tagId, int ifdId) {
+        ExifTag t = getTag(tagId, ifdId);
+        if (t == null) {
+            return 0;
+        }
+        return t.getComponentCount();
+    }
+
+    /**
+     * Gets the default IFD for a tag.
+     *
+     * @param tagId a defined tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @return the default IFD for a tag definition or {@link #IFD_NULL} if no
+     *         definition exists.
+     */
+    public int getDefinedTagDefaultIfd(int tagId) {
+        int info = getTagInfo().get(tagId);
+        if (info == DEFINITION_NULL) {
+            return IFD_NULL;
+        }
+        return getTrueIfd(tagId);
+    }
+
+    /**
+     * Gets the defined type for a tag.
+     *
+     * @param tagId a defined tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @return the type.
+     * @see ExifTag#getDataType()
+     */
+    public short getDefinedTagType(int tagId) {
+        int info = getTagInfo().get(tagId);
+        if (info == 0) {
+            return -1;
+        }
+        return getTypeFromInfo(info);
+    }
+
+    /**
+     * Returns true if tag TID is one of the following: {@link TAG_EXIF_IFD},
+     * {@link TAG_GPS_IFD}, {@link TAG_JPEG_INTERCHANGE_FORMAT},
+     * {@link TAG_STRIP_OFFSETS}, {@link TAG_INTEROPERABILITY_IFD}
+     * <p>
+     * Note: defining tags with these TID's is disallowed.
+     *
+     * @param tag a tag's TID (can be obtained from a defined tag constant with
+     *            {@link #getTrueTagKey}).
+     * @return true if the TID is that of an offset tag.
+     */
+    protected static boolean isOffsetTag(short tag) {
+        return sOffsetTags.contains(tag);
+    }
+
+    /**
+     * Creates a tag for a defined tag constant in a given IFD if that IFD is
+     * allowed for the tag.  This method will fail anytime the appropriate
+     * {@link ExifTag#setValue} for this tag's datatype would fail.
+     *
+     * @param tagId a tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @param ifdId the IFD that the tag should be in.
+     * @param val the value of the tag to set.
+     * @return an ExifTag object or null if one could not be constructed.
+     * @see #buildTag
+     */
+    public ExifTag buildTag(int tagId, int ifdId, Object val) {
+        int info = getTagInfo().get(tagId);
+        if (info == 0 || val == null) {
+            return null;
+        }
+        short type = getTypeFromInfo(info);
+        int definedCount = getComponentCountFromInfo(info);
+        boolean hasDefinedCount = (definedCount != ExifTag.SIZE_UNDEFINED);
+        if (!ExifInterface.isIfdAllowed(info, ifdId)) {
+            return null;
+        }
+        ExifTag t = new ExifTag(getTrueTagKey(tagId), type, definedCount, ifdId, hasDefinedCount);
+        if (!t.setValue(val)) {
+            return null;
+        }
+        return t;
+    }
+
+    /**
+     * Creates a tag for a defined tag constant in the tag's default IFD.
+     *
+     * @param tagId a tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @param val the tag's value.
+     * @return an ExifTag object.
+     */
+    public ExifTag buildTag(int tagId, Object val) {
+        int ifdId = getTrueIfd(tagId);
+        return buildTag(tagId, ifdId, val);
+    }
+
+    protected ExifTag buildUninitializedTag(int tagId) {
+        int info = getTagInfo().get(tagId);
+        if (info == 0) {
+            return null;
+        }
+        short type = getTypeFromInfo(info);
+        int definedCount = getComponentCountFromInfo(info);
+        boolean hasDefinedCount = (definedCount != ExifTag.SIZE_UNDEFINED);
+        int ifdId = getTrueIfd(tagId);
+        ExifTag t = new ExifTag(getTrueTagKey(tagId), type, definedCount, ifdId, hasDefinedCount);
+        return t;
+    }
+
+    /**
+     * Sets the value of an ExifTag if it exists in the given IFD. The value
+     * must be the correct type and length for that ExifTag.
+     *
+     * @param tagId a tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @param ifdId the IFD that the ExifTag is in.
+     * @param val the value to set.
+     * @return true if success, false if the ExifTag doesn't exist or the value
+     *         is the wrong type/length.
+     * @see #setTagValue
+     */
+    public boolean setTagValue(int tagId, int ifdId, Object val) {
+        ExifTag t = getTag(tagId, ifdId);
+        if (t == null) {
+            return false;
+        }
+        return t.setValue(val);
+    }
+
+    /**
+     * Sets the value of an ExifTag if it exists it's default IFD. The value
+     * must be the correct type and length for that ExifTag.
+     *
+     * @param tagId a tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @param val the value to set.
+     * @return true if success, false if the ExifTag doesn't exist or the value
+     *         is the wrong type/length.
+     */
+    public boolean setTagValue(int tagId, Object val) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        return setTagValue(tagId, ifdId, val);
+    }
+
+    /**
+     * Puts an ExifTag into this ExifInterface object's tags, removing a
+     * previous ExifTag with the same TID and IFD. The IFD it is put into will
+     * be the one the tag was created with in {@link #buildTag}.
+     *
+     * @param tag an ExifTag to put into this ExifInterface's tags.
+     * @return the previous ExifTag with the same TID and IFD or null if none
+     *         exists.
+     */
+    public ExifTag setTag(ExifTag tag) {
+        return mData.addTag(tag);
+    }
+
+    /**
+     * Puts a collection of ExifTags into this ExifInterface objects's tags. Any
+     * previous ExifTags with the same TID and IFDs will be removed.
+     *
+     * @param tags a Collection of ExifTags.
+     * @see #setTag
+     */
+    public void setTags(Collection<ExifTag> tags) {
+        for (ExifTag t : tags) {
+            setTag(t);
+        }
+    }
+
+    /**
+     * Removes the ExifTag for a tag constant from the given IFD.
+     *
+     * @param tagId a tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     * @param ifdId the IFD of the ExifTag to remove.
+     */
+    public void deleteTag(int tagId, int ifdId) {
+        mData.removeTag(getTrueTagKey(tagId), ifdId);
+    }
+
+    /**
+     * Removes the ExifTag for a tag constant from that tag's default IFD.
+     *
+     * @param tagId a tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     */
+    public void deleteTag(int tagId) {
+        int ifdId = getDefinedTagDefaultIfd(tagId);
+        deleteTag(tagId, ifdId);
+    }
+
+    /**
+     * Creates a new tag definition in this ExifInterface object for a given TID
+     * and default IFD. Creating a definition with the same TID and default IFD
+     * as a previous definition will override it.
+     *
+     * @param tagId the TID for the tag.
+     * @param defaultIfd the default IFD for the tag.
+     * @param tagType the type of the tag (see {@link ExifTag#getDataType()}).
+     * @param defaultComponentCount the number of elements of this tag's type in
+     *            the tags value.
+     * @param allowedIfds the IFD's this tag is allowed to be put in.
+     * @return the defined tag constant (e.g. {@link #TAG_IMAGE_WIDTH}) or
+     *         {@link #TAG_NULL} if the definition could not be made.
+     */
+    public int setTagDefinition(short tagId, int defaultIfd, short tagType,
+            short defaultComponentCount, int[] allowedIfds) {
+        if (sBannedDefines.contains(tagId)) {
+            return TAG_NULL;
+        }
+        if (ExifTag.isValidType(tagType) && ExifTag.isValidIfd(defaultIfd)) {
+            int tagDef = defineTag(defaultIfd, tagId);
+            if (tagDef == TAG_NULL) {
+                return TAG_NULL;
+            }
+            int[] otherDefs = getTagDefinitionsForTagId(tagId);
+            SparseIntArray infos = getTagInfo();
+            // Make sure defaultIfd is in allowedIfds
+            boolean defaultCheck = false;
+            for (int i : allowedIfds) {
+                if (defaultIfd == i) {
+                    defaultCheck = true;
+                }
+                if (!ExifTag.isValidIfd(i)) {
+                    return TAG_NULL;
+                }
+            }
+            if (!defaultCheck) {
+                return TAG_NULL;
+            }
+
+            int ifdFlags = getFlagsFromAllowedIfds(allowedIfds);
+            // Make sure no identical tags can exist in allowedIfds
+            if (otherDefs != null) {
+                for (int def : otherDefs) {
+                    int tagInfo = infos.get(def);
+                    int allowedFlags = getAllowedIfdFlagsFromInfo(tagInfo);
+                    if ((ifdFlags & allowedFlags) != 0) {
+                        return TAG_NULL;
+                    }
+                }
+            }
+            getTagInfo().put(tagDef, ifdFlags << 24 | (tagType << 16) | defaultComponentCount);
+            return tagDef;
+        }
+        return TAG_NULL;
+    }
+
+    protected int getTagDefinition(short tagId, int defaultIfd) {
+        return getTagInfo().get(defineTag(defaultIfd, tagId));
+    }
+
+    protected int[] getTagDefinitionsForTagId(short tagId) {
+        int[] ifds = IfdData.getIfds();
+        int[] defs = new int[ifds.length];
+        int counter = 0;
+        SparseIntArray infos = getTagInfo();
+        for (int i : ifds) {
+            int def = defineTag(i, tagId);
+            if (infos.get(def) != DEFINITION_NULL) {
+                defs[counter++] = def;
+            }
+        }
+        if (counter == 0) {
+            return null;
+        }
+
+        return Arrays.copyOfRange(defs, 0, counter);
+    }
+
+    protected int getTagDefinitionForTag(ExifTag tag) {
+        short type = tag.getDataType();
+        int count = tag.getComponentCount();
+        int ifd = tag.getIfd();
+        return getTagDefinitionForTag(tag.getTagId(), type, count, ifd);
+    }
+
+    protected int getTagDefinitionForTag(short tagId, short type, int count, int ifd) {
+        int[] defs = getTagDefinitionsForTagId(tagId);
+        if (defs == null) {
+            return TAG_NULL;
+        }
+        SparseIntArray infos = getTagInfo();
+        int ret = TAG_NULL;
+        for (int i : defs) {
+            int info = infos.get(i);
+            short def_type = getTypeFromInfo(info);
+            int def_count = getComponentCountFromInfo(info);
+            int[] def_ifds = getAllowedIfdsFromInfo(info);
+            boolean valid_ifd = false;
+            for (int j : def_ifds) {
+                if (j == ifd) {
+                    valid_ifd = true;
+                    break;
+                }
+            }
+            if (valid_ifd && type == def_type
+                    && (count == def_count || def_count == ExifTag.SIZE_UNDEFINED)) {
+                ret = i;
+                break;
+            }
+        }
+        return ret;
+    }
+
+    /**
+     * Removes a tag definition for given defined tag constant.
+     *
+     * @param tagId a defined tag constant, e.g. {@link #TAG_IMAGE_WIDTH}.
+     */
+    public void removeTagDefinition(int tagId) {
+        getTagInfo().delete(tagId);
+    }
+
+    /**
+     * Resets tag definitions to the default ones.
+     */
+    public void resetTagDefinitions() {
+        mTagInfo = null;
+    }
+
+    /**
+     * Returns the thumbnail from IFD1 as a bitmap, or null if none exists.
+     *
+     * @return the thumbnail as a bitmap.
+     */
+    public Bitmap getThumbnailBitmap() {
+        if (mData.hasCompressedThumbnail()) {
+            byte[] thumb = mData.getCompressedThumbnail();
+            return BitmapFactory.decodeByteArray(thumb, 0, thumb.length);
+        } else if (mData.hasUncompressedStrip()) {
+            // TODO: implement uncompressed
+        }
+        return null;
+    }
+
+    /**
+     * Returns the thumbnail from IFD1 as a byte array, or null if none exists.
+     * The bytes may either be an uncompressed strip as specified in the exif
+     * standard or a jpeg compressed image.
+     *
+     * @return the thumbnail as a byte array.
+     */
+    public byte[] getThumbnailBytes() {
+        if (mData.hasCompressedThumbnail()) {
+            return mData.getCompressedThumbnail();
+        } else if (mData.hasUncompressedStrip()) {
+            // TODO: implement this
+        }
+        return null;
+    }
+
+    /**
+     * Returns the thumbnail if it is jpeg compressed, or null if none exists.
+     *
+     * @return the thumbnail as a byte array.
+     */
+    public byte[] getThumbnail() {
+        return mData.getCompressedThumbnail();
+    }
+
+    /**
+     * Check if thumbnail is compressed.
+     *
+     * @return true if the thumbnail is compressed.
+     */
+    public boolean isThumbnailCompressed() {
+        return mData.hasCompressedThumbnail();
+    }
+
+    /**
+     * Check if thumbnail exists.
+     *
+     * @return true if a compressed thumbnail exists.
+     */
+    public boolean hasThumbnail() {
+        // TODO: add back in uncompressed strip
+        return mData.hasCompressedThumbnail();
+    }
+
+    // TODO: uncompressed thumbnail setters
+
+    /**
+     * Sets the thumbnail to be a jpeg compressed image. Clears any prior
+     * thumbnail.
+     *
+     * @param thumb a byte array containing a jpeg compressed image.
+     * @return true if the thumbnail was set.
+     */
+    public boolean setCompressedThumbnail(byte[] thumb) {
+        mData.clearThumbnailAndStrips();
+        mData.setCompressedThumbnail(thumb);
+        return true;
+    }
+
+    /**
+     * Sets the thumbnail to be a jpeg compressed bitmap. Clears any prior
+     * thumbnail.
+     *
+     * @param thumb a bitmap to compress to a jpeg thumbnail.
+     * @return true if the thumbnail was set.
+     */
+    public boolean setCompressedThumbnail(Bitmap thumb) {
+        ByteArrayOutputStream thumbnail = new ByteArrayOutputStream();
+        if (!thumb.compress(Bitmap.CompressFormat.JPEG, 90, thumbnail)) {
+            return false;
+        }
+        return setCompressedThumbnail(thumbnail.toByteArray());
+    }
+
+    /**
+     * Clears the compressed thumbnail if it exists.
+     */
+    public void removeCompressedThumbnail() {
+        mData.setCompressedThumbnail(null);
+    }
+
+    // Convenience methods:
+
+    /**
+     * Decodes the user comment tag into string as specified in the EXIF
+     * standard. Returns null if decoding failed.
+     */
+    public String getUserComment() {
+        return mData.getUserComment();
+    }
+
+    /**
+     * Returns the Orientation ExifTag value for a given number of degrees.
+     *
+     * @param degrees the amount an image is rotated in degrees.
+     */
+    public static short getOrientationValueForRotation(int degrees) {
+        degrees %= 360;
+        if (degrees < 0) {
+            degrees += 360;
+        }
+        if (degrees < 90) {
+            return Orientation.TOP_LEFT; // 0 degrees
+        } else if (degrees < 180) {
+            return Orientation.RIGHT_TOP; // 90 degrees cw
+        } else if (degrees < 270) {
+            return Orientation.BOTTOM_LEFT; // 180 degrees
+        } else {
+            return Orientation.RIGHT_BOTTOM; // 270 degrees cw
+        }
+    }
+
+    /**
+     * Returns the rotation degrees corresponding to an ExifTag Orientation
+     * value.
+     *
+     * @param orientation the ExifTag Orientation value.
+     */
+    public static int getRotationForOrientationValue(short orientation) {
+        switch (orientation) {
+            case Orientation.TOP_LEFT:
+                return 0;
+            case Orientation.RIGHT_TOP:
+                return 90;
+            case Orientation.BOTTOM_LEFT:
+                return 180;
+            case Orientation.RIGHT_BOTTOM:
+                return 270;
+            default:
+                return 0;
+        }
+    }
+
+    /**
+     * Gets the double representation of the GPS latitude or longitude
+     * coordinate.
+     *
+     * @param coordinate an array of 3 Rationals representing the degrees,
+     *            minutes, and seconds of the GPS location as defined in the
+     *            exif specification.
+     * @param reference a GPS reference reperesented by a String containing "N",
+     *            "S", "E", or "W".
+     * @return the GPS coordinate represented as degrees + minutes/60 +
+     *         seconds/3600
+     */
+    public static double convertLatOrLongToDouble(Rational[] coordinate, String reference) {
+        try {
+            double degrees = coordinate[0].toDouble();
+            double minutes = coordinate[1].toDouble();
+            double seconds = coordinate[2].toDouble();
+            double result = degrees + minutes / 60.0 + seconds / 3600.0;
+            if ((reference.equals("S") || reference.equals("W"))) {
+                return -result;
+            }
+            return result;
+        } catch (ArrayIndexOutOfBoundsException e) {
+            throw new IllegalArgumentException();
+        }
+    }
+
+    /**
+     * Gets the GPS latitude and longitude as a pair of doubles from this
+     * ExifInterface object's tags, or null if the necessary tags do not exist.
+     *
+     * @return an array of 2 doubles containing the latitude, and longitude
+     *         respectively.
+     * @see #convertLatOrLongToDouble
+     */
+    public double[] getLatLongAsDoubles() {
+        Rational[] latitude = getTagRationalValues(TAG_GPS_LATITUDE);
+        String latitudeRef = getTagStringValue(TAG_GPS_LATITUDE_REF);
+        Rational[] longitude = getTagRationalValues(TAG_GPS_LONGITUDE);
+        String longitudeRef = getTagStringValue(TAG_GPS_LONGITUDE_REF);
+        if (latitude == null || longitude == null || latitudeRef == null || longitudeRef == null
+                || latitude.length < 3 || longitude.length < 3) {
+            return null;
+        }
+        double[] latLon = new double[2];
+        latLon[0] = convertLatOrLongToDouble(latitude, latitudeRef);
+        latLon[1] = convertLatOrLongToDouble(longitude, longitudeRef);
+        return latLon;
+    }
+
+    private static final String GPS_DATE_FORMAT_STR = "yyyy:MM:dd";
+    private static final String DATETIME_FORMAT_STR = "yyyy:MM:dd kk:mm:ss";
+    private final DateFormat mDateTimeStampFormat = new SimpleDateFormat(DATETIME_FORMAT_STR);
+    private final DateFormat mGPSDateStampFormat = new SimpleDateFormat(GPS_DATE_FORMAT_STR);
+    private final Calendar mGPSTimeStampCalendar = Calendar
+            .getInstance(TimeZone.getTimeZone("UTC"));
+
+    /**
+     * Creates, formats, and sets the DateTimeStamp tag for one of:
+     * {@link #TAG_DATE_TIME}, {@link #TAG_DATE_TIME_DIGITIZED},
+     * {@link #TAG_DATE_TIME_ORIGINAL}.
+     *
+     * @param tagId one of the DateTimeStamp tags.
+     * @param timestamp a timestamp to format.
+     * @param timezone a TimeZone object.
+     * @return true if success, false if the tag could not be set.
+     */
+    public boolean addDateTimeStampTag(int tagId, long timestamp, TimeZone timezone) {
+        if (tagId == TAG_DATE_TIME || tagId == TAG_DATE_TIME_DIGITIZED
+                || tagId == TAG_DATE_TIME_ORIGINAL) {
+            mDateTimeStampFormat.setTimeZone(timezone);
+            ExifTag t = buildTag(tagId, mDateTimeStampFormat.format(timestamp));
+            if (t == null) {
+                return false;
+            }
+            setTag(t);
+        } else {
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Creates and sets all to the GPS tags for a give latitude and longitude.
+     *
+     * @param latitude a GPS latitude coordinate.
+     * @param longitude a GPS longitude coordinate.
+     * @return true if success, false if they could not be created or set.
+     */
+    public boolean addGpsTags(double latitude, double longitude) {
+        ExifTag latTag = buildTag(TAG_GPS_LATITUDE, toExifLatLong(latitude));
+        ExifTag longTag = buildTag(TAG_GPS_LONGITUDE, toExifLatLong(longitude));
+        ExifTag latRefTag = buildTag(TAG_GPS_LATITUDE_REF,
+                latitude >= 0 ? ExifInterface.GpsLatitudeRef.NORTH
+                        : ExifInterface.GpsLatitudeRef.SOUTH);
+        ExifTag longRefTag = buildTag(TAG_GPS_LONGITUDE_REF,
+                longitude >= 0 ? ExifInterface.GpsLongitudeRef.EAST
+                        : ExifInterface.GpsLongitudeRef.WEST);
+        if (latTag == null || longTag == null || latRefTag == null || longRefTag == null) {
+            return false;
+        }
+        setTag(latTag);
+        setTag(longTag);
+        setTag(latRefTag);
+        setTag(longRefTag);
+        return true;
+    }
+
+    /**
+     * Creates and sets the GPS timestamp tag.
+     *
+     * @param timestamp a GPS timestamp.
+     * @return true if success, false if could not be created or set.
+     */
+    public boolean addGpsDateTimeStampTag(long timestamp) {
+        ExifTag t = buildTag(TAG_GPS_DATE_STAMP, mGPSDateStampFormat.format(timestamp));
+        if (t == null) {
+            return false;
+        }
+        setTag(t);
+        mGPSTimeStampCalendar.setTimeInMillis(timestamp);
+        t = buildTag(TAG_GPS_TIME_STAMP, new Rational[] {
+                new Rational(mGPSTimeStampCalendar.get(Calendar.HOUR_OF_DAY), 1),
+                new Rational(mGPSTimeStampCalendar.get(Calendar.MINUTE), 1),
+                new Rational(mGPSTimeStampCalendar.get(Calendar.SECOND), 1)
+        });
+        if (t == null) {
+            return false;
+        }
+        setTag(t);
+        return true;
+    }
+
+    private static Rational[] toExifLatLong(double value) {
+        // convert to the format dd/1 mm/1 ssss/100
+        value = Math.abs(value);
+        int degrees = (int) value;
+        value = (value - degrees) * 60;
+        int minutes = (int) value;
+        value = (value - minutes) * 6000;
+        int seconds = (int) value;
+        return new Rational[] {
+                new Rational(degrees, 1), new Rational(minutes, 1), new Rational(seconds, 100)
+        };
+    }
+
+    private void doExifStreamIO(InputStream is, OutputStream os) throws IOException {
+        byte[] buf = new byte[1024];
+        int ret = is.read(buf, 0, 1024);
+        while (ret != -1) {
+            os.write(buf, 0, ret);
+            ret = is.read(buf, 0, 1024);
+        }
+    }
+
+    protected static void closeSilently(Closeable c) {
+        if (c != null) {
+            try {
+                c.close();
+            } catch (Throwable e) {
+                // ignored
+            }
+        }
+    }
+
+    private SparseIntArray mTagInfo = null;
+
+    protected SparseIntArray getTagInfo() {
+        if (mTagInfo == null) {
+            mTagInfo = new SparseIntArray();
+            initTagInfo();
+        }
+        return mTagInfo;
+    }
+
+    private void initTagInfo() {
+        /**
+         * We put tag information in a 4-bytes integer. The first byte a bitmask
+         * representing the allowed IFDs of the tag, the second byte is the data
+         * type, and the last two byte are a short value indicating the default
+         * component count of this tag.
+         */
+        // IFD0 tags
+        int[] ifdAllowedIfds = {
+                IfdId.TYPE_IFD_0, IfdId.TYPE_IFD_1
+        };
+        int ifdFlags = getFlagsFromAllowedIfds(ifdAllowedIfds) << 24;
+        mTagInfo.put(ExifInterface.TAG_MAKE,
+                ifdFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_IMAGE_WIDTH,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_LONG << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_IMAGE_LENGTH,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_LONG << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_BITS_PER_SAMPLE,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 3);
+        mTagInfo.put(ExifInterface.TAG_COMPRESSION,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_PHOTOMETRIC_INTERPRETATION,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_ORIENTATION, ifdFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16
+                | 1);
+        mTagInfo.put(ExifInterface.TAG_SAMPLES_PER_PIXEL,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_PLANAR_CONFIGURATION,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_Y_CB_CR_SUB_SAMPLING,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_Y_CB_CR_POSITIONING,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_X_RESOLUTION,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_Y_RESOLUTION,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_RESOLUTION_UNIT,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_STRIP_OFFSETS,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_LONG << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_ROWS_PER_STRIP,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_LONG << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_STRIP_BYTE_COUNTS,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_LONG << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_TRANSFER_FUNCTION,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 3 * 256);
+        mTagInfo.put(ExifInterface.TAG_WHITE_POINT,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_PRIMARY_CHROMATICITIES,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 6);
+        mTagInfo.put(ExifInterface.TAG_Y_CB_CR_COEFFICIENTS,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 3);
+        mTagInfo.put(ExifInterface.TAG_REFERENCE_BLACK_WHITE,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 6);
+        mTagInfo.put(ExifInterface.TAG_DATE_TIME,
+                ifdFlags | ExifTag.TYPE_ASCII << 16 | 20);
+        mTagInfo.put(ExifInterface.TAG_IMAGE_DESCRIPTION,
+                ifdFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_MAKE,
+                ifdFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_MODEL,
+                ifdFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_SOFTWARE,
+                ifdFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_ARTIST,
+                ifdFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_COPYRIGHT,
+                ifdFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_EXIF_IFD,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_LONG << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_GPS_IFD,
+                ifdFlags | ExifTag.TYPE_UNSIGNED_LONG << 16 | 1);
+        // IFD1 tags
+        int[] ifd1AllowedIfds = {
+            IfdId.TYPE_IFD_1
+        };
+        int ifdFlags1 = getFlagsFromAllowedIfds(ifd1AllowedIfds) << 24;
+        mTagInfo.put(ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT,
+                ifdFlags1 | ExifTag.TYPE_UNSIGNED_LONG << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_JPEG_INTERCHANGE_FORMAT_LENGTH,
+                ifdFlags1 | ExifTag.TYPE_UNSIGNED_LONG << 16 | 1);
+        // Exif tags
+        int[] exifAllowedIfds = {
+            IfdId.TYPE_IFD_EXIF
+        };
+        int exifFlags = getFlagsFromAllowedIfds(exifAllowedIfds) << 24;
+        mTagInfo.put(ExifInterface.TAG_EXIF_VERSION,
+                exifFlags | ExifTag.TYPE_UNDEFINED << 16 | 4);
+        mTagInfo.put(ExifInterface.TAG_FLASHPIX_VERSION,
+                exifFlags | ExifTag.TYPE_UNDEFINED << 16 | 4);
+        mTagInfo.put(ExifInterface.TAG_COLOR_SPACE,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_COMPONENTS_CONFIGURATION,
+                exifFlags | ExifTag.TYPE_UNDEFINED << 16 | 4);
+        mTagInfo.put(ExifInterface.TAG_COMPRESSED_BITS_PER_PIXEL,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_PIXEL_X_DIMENSION,
+                exifFlags | ExifTag.TYPE_UNSIGNED_LONG << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_PIXEL_Y_DIMENSION,
+                exifFlags | ExifTag.TYPE_UNSIGNED_LONG << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_MAKER_NOTE,
+                exifFlags | ExifTag.TYPE_UNDEFINED << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_USER_COMMENT,
+                exifFlags | ExifTag.TYPE_UNDEFINED << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_RELATED_SOUND_FILE,
+                exifFlags | ExifTag.TYPE_ASCII << 16 | 13);
+        mTagInfo.put(ExifInterface.TAG_DATE_TIME_ORIGINAL,
+                exifFlags | ExifTag.TYPE_ASCII << 16 | 20);
+        mTagInfo.put(ExifInterface.TAG_DATE_TIME_DIGITIZED,
+                exifFlags | ExifTag.TYPE_ASCII << 16 | 20);
+        mTagInfo.put(ExifInterface.TAG_SUB_SEC_TIME,
+                exifFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_SUB_SEC_TIME_ORIGINAL,
+                exifFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_SUB_SEC_TIME_DIGITIZED,
+                exifFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_IMAGE_UNIQUE_ID,
+                exifFlags | ExifTag.TYPE_ASCII << 16 | 33);
+        mTagInfo.put(ExifInterface.TAG_EXPOSURE_TIME,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_F_NUMBER,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_EXPOSURE_PROGRAM,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_SPECTRAL_SENSITIVITY,
+                exifFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_ISO_SPEED_RATINGS,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_OECF,
+                exifFlags | ExifTag.TYPE_UNDEFINED << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_SHUTTER_SPEED_VALUE,
+                exifFlags | ExifTag.TYPE_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_APERTURE_VALUE,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_BRIGHTNESS_VALUE,
+                exifFlags | ExifTag.TYPE_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_EXPOSURE_BIAS_VALUE,
+                exifFlags | ExifTag.TYPE_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_MAX_APERTURE_VALUE,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_SUBJECT_DISTANCE,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_METERING_MODE,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_LIGHT_SOURCE,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_FLASH,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_FOCAL_LENGTH,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_SUBJECT_AREA,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_FLASH_ENERGY,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_SPATIAL_FREQUENCY_RESPONSE,
+                exifFlags | ExifTag.TYPE_UNDEFINED << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_FOCAL_PLANE_X_RESOLUTION,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_FOCAL_PLANE_Y_RESOLUTION,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_FOCAL_PLANE_RESOLUTION_UNIT,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_SUBJECT_LOCATION,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_EXPOSURE_INDEX,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_SENSING_METHOD,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_FILE_SOURCE,
+                exifFlags | ExifTag.TYPE_UNDEFINED << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_SCENE_TYPE,
+                exifFlags | ExifTag.TYPE_UNDEFINED << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_CFA_PATTERN,
+                exifFlags | ExifTag.TYPE_UNDEFINED << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_CUSTOM_RENDERED,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_EXPOSURE_MODE,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_WHITE_BALANCE,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_DIGITAL_ZOOM_RATIO,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_FOCAL_LENGTH_IN_35_MM_FILE,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_SCENE_CAPTURE_TYPE,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_GAIN_CONTROL,
+                exifFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_CONTRAST,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_SATURATION,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_SHARPNESS,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_DEVICE_SETTING_DESCRIPTION,
+                exifFlags | ExifTag.TYPE_UNDEFINED << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_SUBJECT_DISTANCE_RANGE,
+                exifFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_INTEROPERABILITY_IFD, exifFlags
+                | ExifTag.TYPE_UNSIGNED_LONG << 16 | 1);
+        // GPS tag
+        int[] gpsAllowedIfds = {
+            IfdId.TYPE_IFD_GPS
+        };
+        int gpsFlags = getFlagsFromAllowedIfds(gpsAllowedIfds) << 24;
+        mTagInfo.put(ExifInterface.TAG_GPS_VERSION_ID,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_BYTE << 16 | 4);
+        mTagInfo.put(ExifInterface.TAG_GPS_LATITUDE_REF,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_GPS_LONGITUDE_REF,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_GPS_LATITUDE,
+                gpsFlags | ExifTag.TYPE_RATIONAL << 16 | 3);
+        mTagInfo.put(ExifInterface.TAG_GPS_LONGITUDE,
+                gpsFlags | ExifTag.TYPE_RATIONAL << 16 | 3);
+        mTagInfo.put(ExifInterface.TAG_GPS_ALTITUDE_REF,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_BYTE << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_GPS_ALTITUDE,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_GPS_TIME_STAMP,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 3);
+        mTagInfo.put(ExifInterface.TAG_GPS_SATTELLITES,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_GPS_STATUS,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_GPS_MEASURE_MODE,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_GPS_DOP,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_GPS_SPEED_REF,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_GPS_SPEED,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_GPS_TRACK_REF,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_GPS_TRACK,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_GPS_IMG_DIRECTION_REF,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_GPS_IMG_DIRECTION,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_GPS_MAP_DATUM,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_GPS_DEST_LATITUDE_REF,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_GPS_DEST_LATITUDE,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_GPS_DEST_BEARING_REF,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_GPS_DEST_BEARING,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_GPS_DEST_DISTANCE_REF,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | 2);
+        mTagInfo.put(ExifInterface.TAG_GPS_DEST_DISTANCE,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_RATIONAL << 16 | 1);
+        mTagInfo.put(ExifInterface.TAG_GPS_PROCESSING_METHOD,
+                gpsFlags | ExifTag.TYPE_UNDEFINED << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_GPS_AREA_INFORMATION,
+                gpsFlags | ExifTag.TYPE_UNDEFINED << 16 | ExifTag.SIZE_UNDEFINED);
+        mTagInfo.put(ExifInterface.TAG_GPS_DATE_STAMP,
+                gpsFlags | ExifTag.TYPE_ASCII << 16 | 11);
+        mTagInfo.put(ExifInterface.TAG_GPS_DIFFERENTIAL,
+                gpsFlags | ExifTag.TYPE_UNSIGNED_SHORT << 16 | 11);
+        // Interoperability tag
+        int[] interopAllowedIfds = {
+            IfdId.TYPE_IFD_INTEROPERABILITY
+        };
+        int interopFlags = getFlagsFromAllowedIfds(interopAllowedIfds) << 24;
+        mTagInfo.put(TAG_INTEROPERABILITY_INDEX, interopFlags | ExifTag.TYPE_ASCII << 16
+                | ExifTag.SIZE_UNDEFINED);
+    }
+
+    protected static int getAllowedIfdFlagsFromInfo(int info) {
+        return info >>> 24;
+    }
+
+    protected static int[] getAllowedIfdsFromInfo(int info) {
+        int ifdFlags = getAllowedIfdFlagsFromInfo(info);
+        int[] ifds = IfdData.getIfds();
+        ArrayList<Integer> l = new ArrayList<Integer>();
+        for (int i = 0; i < IfdId.TYPE_IFD_COUNT; i++) {
+            int flag = (ifdFlags >> i) & 1;
+            if (flag == 1) {
+                l.add(ifds[i]);
+            }
+        }
+        if (l.size() <= 0) {
+            return null;
+        }
+        int[] ret = new int[l.size()];
+        int j = 0;
+        for (int i : l) {
+            ret[j++] = i;
+        }
+        return ret;
+    }
+
+    protected static boolean isIfdAllowed(int info, int ifd) {
+        int[] ifds = IfdData.getIfds();
+        int ifdFlags = getAllowedIfdFlagsFromInfo(info);
+        for (int i = 0; i < ifds.length; i++) {
+            if (ifd == ifds[i] && ((ifdFlags >> i) & 1) == 1) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    protected static int getFlagsFromAllowedIfds(int[] allowedIfds) {
+        if (allowedIfds == null || allowedIfds.length == 0) {
+            return 0;
+        }
+        int flags = 0;
+        int[] ifds = IfdData.getIfds();
+        for (int i = 0; i < IfdId.TYPE_IFD_COUNT; i++) {
+            for (int j : allowedIfds) {
+                if (ifds[i] == j) {
+                    flags |= 1 << i;
+                    break;
+                }
+            }
+        }
+        return flags;
+    }
+
+    protected static short getTypeFromInfo(int info) {
+        return (short) ((info >> 16) & 0x0ff);
+    }
+
+    protected static int getComponentCountFromInfo(int info) {
+        return info & 0x0ffff;
+    }
+
+}