java.lang.NullPointerException: 尝试在为空对象上写入字段 'int android.support.v7.widget.RecyclerView$ViewHolder.mItemViewType'

at android.support.v7.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:5465) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4689) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4599) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1988) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1384) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1347) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.support.v7.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java:1174) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy(LinearLayoutManager.java:1031) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.support.v7.widget.RecyclerView.scrollByInternal(RecyclerView.java:1504) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.support.v7.widget.RecyclerView.onTouchEvent(RecyclerView.java:2461) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.view.View.dispatchTouchEvent(View.java:9295) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2547) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2240) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2553) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2553) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2553) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2553) 05-05 15:13:41.388 20154-20154/com.softinfo.zdl.smartPhone E/AndroidRuntime: at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254) 05-05