qq_38034939
qq_38034939
采纳率46.2%
2017-08-03 06:47 阅读 1.6k

帮忙看看这个android错误 !

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.lenovo.push, PID: 17578
java.lang.NullPointerException: Attempt to write to field 'int android.support.v7.widget.RecyclerView$ViewHolder.mItemViewType' on a null object reference
at android.support.v7.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:6368)
at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5555)
at android.support.v7.widget.RecyclerView$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:18799)
at android.view.ViewGroup.layout(ViewGroup.java:5952)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:18799)
at android.view.ViewGroup.layout(ViewGroup.java:5952)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:18799)
at android.view.ViewGroup.layout(ViewGroup.java:5952)
at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:131)
at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42)
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1391)
at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:870)
at android.view.View.layout(View.java:18799)
at android.view.ViewGroup.layout(ViewGroup.java:5952)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:18799)
at android.view.ViewGroup.layout(ViewGroup.java:5952)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1741)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1585)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1494)
at android.view.View.layout(View.java:18799)
at android.view.ViewGroup.layout(ViewGroup.java:5952)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:18799)
at android.view.ViewGroup.layout(ViewGroup.java:5952)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1741)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1585)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1494)
at android.view.View.layout(View.java:18799)
at android.view.ViewGroup.layout(ViewGroup.java:5952)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at com.android.internal.policy.DecorView.onLayout(DecorView.java:822)
at android.view.View.layout(View.java:18799)
at android.view.ViewGroup.layout(ViewGroup.java:5952)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2627)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2343)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1502)
E/AndroidRuntime: at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7044)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:927)
at android.view.Choreographer.doCallbacks(Choreographer.java:702)
at android.view.Choreographer.doFrame(Choreographer.java:638)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:913)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6692)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)
Application terminated.

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4条回答 默认 最新

  • qq_23126581 郭老师的小迷弟雅思莫了 2017-08-03 06:50

    空指针异常,你debug下程序喽,一步一步跟着走,看看那里没有获取的值。

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  • tydqcjj tydqcjj 2017-08-03 07:50

    空指针,检查下你的Viewholder

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  • u013122122 上善若谷 2017-08-03 08:54

    ViewHoder里面的变量接收到null值,检查下这个mItemViewType变量

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  • asasasdasfaf caolin-tech 2017-08-03 10:43

    对,mItemViewType为空

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