Merge "Unhide ExifThumbnail.getThumbnailRange() and make it match the comment." into nyc-dev

am: e1d0cab

* commit 'e1d0cabb5f4ccc43d7fa1d84a02a87a8683f8537':
  Unhide ExifThumbnail.getThumbnailRange() and make it match the comment.

Change-Id: Ic637439d4d49829f46c64ecced05c838e45fc211

api/current.txt

@@ -20135,6 +20135,7 @@ package android.media {
     method public int getAttributeInt(java.lang.String, int);
     method public boolean getLatLong(float[]);
     method public byte[] getThumbnail();
+    method public long[] getThumbnailRange();
     method public boolean hasThumbnail();
     method public void saveAttributes() throws java.io.IOException;
     method public void setAttribute(java.lang.String, java.lang.String);

api/system-current.txt

@@ -21627,6 +21627,7 @@ package android.media {
     method public int getAttributeInt(java.lang.String, int);
     method public boolean getLatLong(float[]);
     method public byte[] getThumbnail();
+    method public long[] getThumbnailRange();
     method public boolean hasThumbnail();
     method public void saveAttributes() throws java.io.IOException;
     method public void setAttribute(java.lang.String, java.lang.String);

api/test-current.txt

@@ -20200,6 +20200,7 @@ package android.media {
     method public int getAttributeInt(java.lang.String, int);
     method public boolean getLatLong(float[]);
     method public byte[] getThumbnail();
+    method public long[] getThumbnailRange();
     method public boolean hasThumbnail();
     method public void saveAttributes() throws java.io.IOException;
     method public void setAttribute(java.lang.String, java.lang.String);

media/java/android/media/ExifInterface.java

@@ -1079,12 +1079,16 @@ public class ExifInterface {
      *
      * @return two-element array, the offset in the first value, and length in
      *         the second, or {@code null} if no thumbnail was found.
-     * @hide
      */
     public long[] getThumbnailRange() {
+        if (!mHasThumbnail) {
+            return null;
+        }
+
         long[] range = new long[2];
         range[0] = mThumbnailOffset;
         range[1] = mThumbnailLength;
+
         return range;
     }