Gallery2: Fix Gallery crash when exit playing gif pic.

When we press back key to exit playing gif pic,the decoder is
free and set to null,which casuse this bug happened.

Add a condition to avoid the NullPointerException.

CRs-fixed: 653709

Change-Id: Iab299554c252c3a1c9352b498cd946cb53e47cc7

1 files changed, 3 insertions, 0 deletions

diff --git a/src/com/android/gallery3d/util/GIFView.java b/src/com/android/gallery3d/util/GIFView.java
index fd4a5b269..86003fb31 100755
--- a/src/com/android/gallery3d/util/GIFView.java
+++ b/src/com/android/gallery3d/util/GIFView.java
@@ -174,6 +174,9 @@ public class GIFView extends ImageView implements GifAction {
                 if (!isShown() || mRedrawHandler == null) {
                     break;
                 }
+                if (mGifDecoder == null) {
+                    return;
+                }
                 GifFrame frame = mGifDecoder.next();
                 mCurrentImage = frame.mImage;