java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
	at com.zhihu.matisse.internal.entity.Item.isGif(Item.java:91)
	at com.zhihu.matisse.internal.ui.widget.PhotoGrid.setGifTag(PhotoGrid.java:88)
	at com.zhihu.matisse.internal.ui.widget.PhotoGrid.bindPhoto(PhotoGrid.java:78)
	at com.zhihu.matisse.internal.ui.adapter.AlbumPhotosAdapter.onBindViewHolder(AlbumPhotosAdapter.java:111)
	at com.zhihu.matisse.internal.ui.adapter.RecyclerViewCursorAdapter.onBindViewHolder(RecyclerViewCursorAdapter.java:44)
	at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6356)
	at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6389)
	at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5335)
	at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5598)
	at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5440)
	at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5436)
	at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2224)
	at android.support.v7.widget.GridLayoutManager.layoutChunk(GridLayoutManager.java:556)
	at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1511)
	at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:595)
	at android.support.v7.widget.GridLayoutManager.onLayoutChildren(GridLayoutManager.java:170)
	at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3583)
	at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3312)
	at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3844)
	at android.view.View.layout(View.java:17942)
	at android.view.ViewGroup.layout(ViewGroup.java:5754)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:383)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:321)
	at android.view.View.layout(View.java:17942)
	at android.view.ViewGroup.layout(ViewGroup.java:5754)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:383)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:321)
	at android.view.View.layout(View.java:17942)
	at android.view.ViewGroup.layout(ViewGroup.java:5754)
	at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1189)
	at android.view.View.layout(View.java:17942)
	at android.view.ViewGroup.layout(ViewGroup.java:5754)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:383)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:321)
	at android.view.View.layout(View.java:17942)
	at android.view.ViewGroup.layout(ViewGroup.java:5754)
	at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1982)
	at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1826)
	at android.widget.LinearLayout.onLayout(LinearLayout.java:1735)
	at android.view.View.layout(View.java:17942)
	at android.view.ViewGroup.layout(ViewGroup.java:5754)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:383)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:321)
	at android.view.View.layout(View.java:17942)
	at android.view.ViewGroup.layout(ViewGroup.java:5754)
	at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1982)
	at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1826)
	at android.widget.LinearLayout.onLayout(LinearLayout.java:1735)
	at android.view.View.layout(View.java:17942)
	at android.view.ViewGroup.layout(ViewGroup.java:5754)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:383)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:321)
	at com.android.internal.policy.DecorView.onLayout(DecorView.java:747)
	at android.view.View.layout(View.java:17942)
	at android.view.ViewGroup.layout(ViewGroup.java:5754)
	at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2737)
	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2407)
	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1481)
	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7077)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:909)
	at android.view.Choreographer.doCallbacks(Choreographer.java:711)
	at android.view.Choreographer.doFrame(Choreographer.java:646)
	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:895)
	at android.os.Handler.handleCallback(Handler.java:836)
	at android.os.Handler.dispatchMessage(Handler.java:103)
	at android.os.Looper.loop(Looper.java:203)
	at android.app.ActivityThread.main(ActivityThread.java:6412)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1113)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:974)