Question

当RecyclerView的内容发生变化时，有时会出现问题。我有搜索视图，过滤RecyclerView的数据。过滤后我调用notifyDataSetChanged（）;

我使用https://gist.github.com/mheras/0908873267def75dc746作为适配器。

我当时认为这个问题与添加页脚有关，但删除页脚问题后仍然会出现，但不是经常出现

例外：

java.lang.IllegalStateException：添加了View将RecyclerView作为父级，但视图不是真正的孩子。未过滤的索引：0 在android.support.v7.widget.RecyclerView $ LayoutManager.addViewInt（RecyclerView.java:7048）在android.support.v7.widget.RecyclerView $ LayoutManager.addView（RecyclerView.java:7012）在android.support.v7.widget.RecyclerView $ LayoutManager.addView（RecyclerView.java:7000）在android.support.v7.widget.LinearLayoutManager.layoutChunk（LinearLayoutManager.java:1428）在android.support.v7.widget.LinearLayoutManager.fill（LinearLayoutManager.java:1377）在android.support.v7.widget.LinearLayoutManager.onLayoutChildren（LinearLayoutManager.java:578）在android.support.v7.widget.RecyclerView.dispatchLayoutStep2（RecyclerView.java:3260）在android.support.v7.widget.RecyclerView.dispatchLayout（RecyclerView.java:3069）在android.support.v7.widget.RecyclerView.onLayout（RecyclerView.java:3518）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.support.v4.widget.SwipeRefreshLayout.onLayout（SwipeRefreshLayout.java:598）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.support.v7.widget.ActionBarOverlayLayout.onLayout（ActionBarOverlayLayout.java:435）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1743）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1586）在android.widget.LinearLayout.onLayout（LinearLayout.java:1495）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在com.android.internal.policy.PhoneWindow $ DecorView.onLayout（PhoneWindow.java:2678）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.view.ViewRootImpl.performLayout（ViewRootImpl.java:2171）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1931）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1107）在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:6013）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:858）在android.view.Choreographer.doCallbacks（Choreographer.java:670）在android.view.Choreographer.doFrame（Choreographer.java:606）在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:844）在android.os.Handler.handleCallback（Handler.java:739）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:148）在android.app.ActivityThread.main（ActivityThread.java:5417）在java.lang.reflect.Method.invoke（Nat

Answer 1

我遇到了同样的问题...我通过使用 ViewHolder <View <{1}}来Context parent.getContext()来解决问题/ strong>，并在对false的调用中指定 inflate ：

final override fun onCreateViewHolder(parent:ViewGroup,viewType:Int):RecyclerView.ViewHolder { View view = LayoutInflater.from(parent.getContext()) .inflate(R.layout.listitem,parent,false); return new RecyclerView.ViewHolder(view) {}; }

Answer 2

我们实际上通过编写自己的适配器来解决它：

public abstract class BaseRVAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    static final int HEADER_VIEW_TYPE = Integer.MAX_VALUE;
    static final int FOOTER_VIEW_TYPE = Integer.MAX_VALUE - 1;

    private BaseRVAdapterHeaderImpl adapterHeader;

    private BaseRVAdapterFooterImpl adapterFooter;

    public void setFooterImpl(BaseRVAdapterFooterImpl footerImpl) {
        adapterFooter = footerImpl;
    }

    public void setHeaderImpl(BaseRVAdapterHeaderImpl headerImpl) {
        adapterHeader = headerImpl;
    }

    public abstract RecyclerView.ViewHolder onCreateContentItemViewHolder(ViewGroup parent, int viewType);

    public abstract void onBindContentItemViewHolder(RecyclerView.ViewHolder holder, int position);

    public abstract int getContentItemCount();

    public int getContentItemViewType(int position) {
        return 0;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if (viewType == HEADER_VIEW_TYPE) {
            return new HeaderViewHolder(adapterHeader.getHeaderView());
        }

        if (viewType == FOOTER_VIEW_TYPE) {
            return new FooterViewHolder(adapterFooter.getFooterView());
        }

        return onCreateContentItemViewHolder(parent, viewType);
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        if (holder instanceof HeaderViewHolder) {
            //bind header view holder
        } else if (holder instanceof FooterViewHolder) {
            adapterFooter.onBind(holder.itemView);
        } else {
            onBindContentItemViewHolder(holder, position - getHeaderItemCount());
        }
    }

    @Override
    public int getItemCount() {
        return getContentItemCount() + getHeaderItemCount() + getFooterItemCount();
    }

    @Override
    public int getItemViewType(int position) {
        if (hasHeader() && position < getHeaderItemCount()) {
            return HEADER_VIEW_TYPE;
        }

        if (position == getItemCount() - 1 && hasFooter()) {
            return FOOTER_VIEW_TYPE;
        }

        return getContentItemViewType(position - getHeaderItemCount());
    }

    public int getAdapterContentPosition(RecyclerView.ViewHolder holder) {
        return holder.getAdapterPosition() - getHeaderItemCount();
    }

    public void notifyContentItemRangeInserted(int positionStart, int itemCount) {
        notifyItemRangeInserted(positionStart + getHeaderItemCount(), itemCount);
    }

    public void notifyContentItemRangeRemoved(int positionStart, int itemCount) {
        notifyItemRangeRemoved(positionStart + getHeaderItemCount(), itemCount);
    }

    public void notifyContentItemRemoved(int position) {
        notifyItemRemoved(position + getHeaderItemCount());
    }

    public void notifyContentItemChanged(int position) {
        notifyItemChanged(position + getHeaderItemCount());
    }

    public void notifyFooterItemChanged() {
        notifyItemChanged(getContentItemCount() + getFooterItemCount());
    }

    public boolean hasHeader() {
        return adapterHeader != null;
    }

    boolean hasFooter() {
        return adapterFooter != null;
    }

    public int getHeaderItemCount() {
        return hasHeader() ? 1 : 0;
    }

    public int getFooterItemCount() {
        return hasFooter() ? 1 : 0;
    }

    public interface BaseRVAdapterHeaderImpl {
        View getHeaderView();
    }

    public static abstract class BaseRVAdapterFooterImpl {
        public abstract View getFooterView();

        public void onBind(View view) {

        }
    }

    private class HeaderViewHolder extends RecyclerView.ViewHolder {
        HeaderViewHolder(View itemView) {
            super(itemView);
        }
    }

    private class FooterViewHolder extends RecyclerView.ViewHolder {
        FooterViewHolder(View itemView) {
            super(itemView);
        }
    }

    public RecyclerView.ItemDecoration getBottomItemDecoration() {
        int marginBottom = App.getContext().getResources().getDimensionPixelSize(R.dimen.dimen_small);

        return new RecyclerView.ItemDecoration() {
            @Override
            public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
                super.getItemOffsets(outRect, view, parent, state);

                int position = parent.getChildAdapterPosition(view);
                int contentItemCount = getContentItemCount();
                if (position == contentItemCount) {
                    outRect.bottom = marginBottom;
                }
            }
        };
    }
}

添加View将RecyclerView作为父级，但视图不是真正的孩子

2 个答案: