如何在已重复的View中再次重复View？安卓ListView嵌套实现求助

Hey there! Let's tackle this nested list display issue you're facing with your Android app and the SwipeLayout library. The core idea is to embed a sub-list container within each ListView item, then bind your ArrayList<SubItem> data to it. Here's a step-by-step, practical solution:

First, create the layout for your main ListView item (including the SwipeLayout and a container for sub-items). We'll use RecyclerView for sub-items (it's more efficient than nesting ListView and avoids height calculation issues):

<!-- item_main.xml: Main ListView item layout with SwipeLayout -->
<com.daimajia.swipe.SwipeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <!-- Right swipe menu (customize as needed) -->
    <LinearLayout
        android:id="@+id/right_swipe_menu"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="#E53935"
        android:orientation="horizontal">
        <Button
            android:layout_width="80dp"
            android:layout_height="match_parent"
            android:text="Delete"
            android:textColor="#FFFFFF"/>
    </LinearLayout>

    <!-- Main content area -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <!-- Main item info -->
        <TextView
            android:id="@+id/tv_main_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="16dp"
            android:textSize="18sp"
            android:textStyle="bold"/>

        <!-- Container for SubItems (RecyclerView) -->
        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/rv_sub_items"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingStart="24dp"/>

    </LinearLayout>

</com.daimajia.swipe.SwipeLayout>

Then create a simple layout for individual SubItems:

<!-- item_sub.xml: SubItem layout -->
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tv_sub_content"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="10dp"
    android:textSize="14sp"
    android:textColor="#424242"/>

Create a dedicated RecyclerView.Adapter to bind your SubItem data:

public class SubItemAdapter extends RecyclerView.Adapter<SubItemAdapter.SubViewHolder> {
    private List<SubItem> mSubItemList;

    public SubItemAdapter(List<SubItem> subItemList) {
        mSubItemList = subItemList;
    }

    @NonNull
    @Override
    public SubViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.item_sub, parent, false);
        return new SubViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull SubViewHolder holder, int position) {
        SubItem currentSubItem = mSubItemList.get(position);
        holder.tvSubContent.setText(currentSubItem.getContent()); // Replace with your SubItem's data getter
    }

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

    static class SubViewHolder extends RecyclerView.ViewHolder {
        TextView tvSubContent;

        public SubViewHolder(@NonNull View itemView) {
            super(itemView);
            tvSubContent = itemView.findViewById(R.id.tv_sub_content);
        }
    }
}

Modify your main ListView's BaseAdapter to initialize the sub-recyclerView and bind SubItem data for each main item:

public class MainItemAdapter extends BaseAdapter {
    private Context mContext;
    private List<Item> mItemList;

    public MainItemAdapter(Context context, List<Item> itemList) {
        mContext = context;
        mItemList = itemList;
    }

    @Override
    public int getCount() {
        return mItemList.size();
    }

    @Override
    public Object getItem(int position) {
        return mItemList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = LayoutInflater.from(mContext)
                    .inflate(R.layout.item_main, parent, false);
            holder = new ViewHolder();
            holder.tvMainTitle = convertView.findViewById(R.id.tv_main_title);
            holder.rvSubItems = convertView.findViewById(R.id.rv_sub_items);
            // Configure sub-recyclerView layout manager
            holder.rvSubItems.setLayoutManager(new LinearLayoutManager(mContext));
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        // Bind main item data
        Item currentItem = mItemList.get(position);
        holder.tvMainTitle.setText(currentItem.getTitle()); // Replace with your Item's data getter

        // Bind sub-item data via SubItemAdapter
        SubItemAdapter subAdapter = new SubItemAdapter(currentItem.getSubItems());
        holder.rvSubItems.setAdapter(subAdapter);

        // Configure SwipeLayout (adjust mode as needed)
        SwipeLayout swipeLayout = (SwipeLayout) convertView;
        swipeLayout.setShowMode(SwipeLayout.ShowMode.LayDown);
        // Add swipe listeners if required

        return convertView;
    }

    static class ViewHolder {
        TextView tvMainTitle;
        RecyclerView rvSubItems;
    }
}

• Avoid nesting ListView: ListView doesn't handle dynamic height well for nested scenarios, which leads to truncated sub-items. RecyclerView is the better choice here.
• Swipe conflict handling: If you encounter swipe conflicts between SwipeLayout and the sub-recyclerView, you can override the sub-recyclerView's onTouchEvent to intercept gestures when needed.
• Performance: For large datasets, consider adding view recycling optimizations (like stable IDs for adapters) and using DiffUtil for sub-item updates.

内容的提问来源于stack exchange，提问作者NameTopSecret