RecyclerView:检测到不一致.商品位置无效.原因 - 使用计时器删除项目

Question

在继续前进之前,我在google上搜索这个bug,我发现了很多可用的答案,但我的情况与他们的情况不同.

java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid item position 2(offset:2).state:3

我使用recyclerview显示民意调查问题,每个问题都有一个计时器,当计时器用完时,项目将从列表中删除.

当计时器用完时会发生异常,但仅在极少数情况下,剩余较少的时间(前100毫秒).因此,在这种情况下,recyclerview可能是膨胀项目,同时,计时器运行并且recyclerview尝试删除该项目.

错误是当计时器删除项目我得到例外.

因此,当该轮询剩余1秒或更少时,我从数据集中删除元素后解决了这个问题.所以它不会在列表中添加项目,并且将运行计时器.

如果你想产生错误,只需启动倒数计时器, bindView并在计时器用完后删除该特定项目.你必须使计时器低于500毫秒.

所以现在一切都很完美.崩溃的罕见情况已经解决,但即使剩余的时间较少,我也不想从数据集中删除元素.请给我这个bug的正确解决方案.

编辑

java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid item position 1(offset:1).state:2 com.lsjwzh.widget.recyclerviewpager.RecyclerViewPager{182da0c VFED..... .F....ID 0,0-720,1024 #7f0a01a1 app:id/recycler_view}, adapter:com.lsjwzh.widget.recyclerviewpager.RecyclerViewPagerAdapter@c9403f, layout:android.support.v7.widget.LinearLayoutManager@6fdbd0c, context:com.bitpoll.polls.MainActivity@b40f4c0
     android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5817)
     android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5752)
     android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5748)
     android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2232)
     android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1559)
     android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1519)
     android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:614)
     android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3812)
     android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3529)
     android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:4082)
     android.view.View.layout(View.java:17969)
     android.view.ViewGroup.layout(ViewGroup.java:5721)
     android.support.v4.widget.SwipeRefreshLayout.onLayout(SwipeRefreshLayout.java:606)
     android.view.View.layout(View.java:17969)
     android.view.ViewGroup.layout(ViewGroup.java:5721)
     android.widget.RelativeLayout.onLayout(RelativeLayout.java:1189)
     android.view.View.layout(View.java:17969)
     android.view.ViewGroup.layout(ViewGroup.java:5721)
     android.support.constraint.ConstraintLayout.onLayout(ConstraintLayout.java:1855)
     android.view.View.layout(View.java:17969)
     android.view.ViewGroup.layout(ViewGroup.java:5721)
     android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:132)
     android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42)
     android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1361)
     android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:894)
     android.view.View.layout(View.java:17969)
     android.view.ViewGroup.layout(ViewGroup.java:5721)
     android.widget.RelativeLayout.onLayout(RelativeLayout.java:1189)
     android.view.View.layout(View.java:17969)
     android.view.ViewGroup.layout(ViewGroup.java:5721)
     android.widget.FrameLayout.layoutChildren(FrameLayout.java:383)
     android.widget.FrameLayout.onLayout(FrameLayout.java:321)
     android.view.View.layout(View.java:17969)
     android.view.ViewGroup.layout(ViewGroup.java:5721)
     android.widget.LinearLayout.setChildFrame(LinearLayout.java:1982)
     android.widget.LinearLayout.layoutVertical(LinearLayout.java:1826)
     android.widget.LinearLayout.onLayout(LinearLayout.java:1735)
     android.view.View.layout(View.java:17969)
     android.view.ViewGroup.layout(ViewGroup.java:5721)
     android.widget.FrameLayout.layoutChildren(FrameLayout.java:383)
     android.widget.FrameLayout.onLayout(FrameLayout.java:321)
     android.view.View.layout(View.java:17969)
     android.view.ViewGroup.layout(ViewGroup.java:5721)
     android.widget.LinearLayout.setChildFrame(LinearLayout.java:1982)
     android.widget.LinearLayout.layoutVertical(LinearLayout.java:1826)
     android.widget.LinearLayout.onLayout(LinearLayout.java:1735)
     android.view.View.layout(View.java:17969)
     android.view.ViewGroup.layout(ViewGroup.java:5721)
     android.widget.FrameLayout.layoutChildren(FrameLayout.java:383)
     android.widget.FrameLayout.onLayout(FrameLayout.java:321)
     com.android.internal.policy.DecorView.onLayout(DecorView.java:753)
     android.view.View.layout(View.java:17969)

更新

这是适配器代码.

public class PollAdapter extends RecyclerView.Adapter<PollAdapter.PollViewHolder> {

    // .... 

    @Override
    public void onBindViewHolder(@NonNull PollViewHolder holder, int position) {

    // ...

        if (holder.countDownTimer != null) {
            holder.countDownTimer.cancel();
        }

        // CountDown to set Timer in poll
        holder.countDownTimer = new CountDownTimer(<Timer to be finished.>, 1000) {

            public void onTick(long millisUntilFinished) {
                holder.time.setText("<Remaining time>");
            }

            public void onFinish() {
                removeAt(holder.getAdapterPosition());
            }

        }.start();
    }

    @Override
    public int getItemCount() {
        return pollList.size();
    }

    // To Remove Poll after Time finished
    public void removeAt(int position) {
    pollList.remove(position);
        notifyItemRemoved(position);
    }
}

Answer 1

在此，当错误出现Adapter的RecyclerView不被通知的变化。

要解决此错误，请查找底层数据正在更改的所有点，Adapter没有直接的解决方案，因为这是内部崩溃，由RecyclerView

你可以做的是：

1. 既然你加入，通话notifyItemInserted时加
2. 并且因为您正在删除以及notifyItemRemoved在删除时调用

要在没有任何优化的情况下进行测试，您还可以同时调用notifyDataSetChanged这两个时间。

Answer 2

使用自定义 LinearLayoutManager

public class CustLinearLayoutManager extends LinearLayoutManager {

public CustLinearLayoutManager(Context context) {
    super(context);
}

public CustLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {
    super(context, orientation, reverseLayout);
}

public CustLinearLayoutManager(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
    super(context, attrs, defStyleAttr, defStyleRes);
}

// Something is happening here

@Override
public boolean supportsPredictiveItemAnimations() {
    return false;
  }
}

用：-

CustLinearLayoutManager clm = new CustLinearLayoutManagerr(mContext);
recyclerView.setLayoutManager(clm);

我希望它会起作用

Answer 3

这个问题主要是因为位置问题造成的。

如果您删除一个职位或进行任何更改调用notifydatasetchanged，那么只会发生更改。

简单地说，如果您删除一个位置或清除一个数组，如果 notydatasetchanged 没有被调用，则 recyclerview 将保持位置初始化。

如果有一个数据数组，我刚刚清除了该数组并尝试滚动 recyclerview 将显示此问题，因为 notydatasetchanged 未调用。（回收器视图有位置，但数组没有找到位置）

注意：抱歉我的英语不好