如何在另一个recyclerview适配器下使用recyclerview适配器？

Question

我有一个RecyclerView。它有一个自定义布局，自定义布局内部是另一个 RecyclerView。当我通知回收站视图某个项目已被删除时，我的主回收站视图已更新，但我的自定义视图回收视图未收到通知。

 SwipeDismissRecyclerViewTouchListener listener = new SwipeDismissRecyclerViewTouchListener.Builder(
            recyclerView,
            new SwipeDismissRecyclerViewTouchListener.DismissCallbacks() {
                @Override
                public boolean canDismiss(int position) {

                    return true;
                }

                @Override
                public void onDismiss(View view) {
                    // Do what you want when dismiss
                    int id = recyclerView.getChildAdapterPosition(view);
                    databaseHelper.deleteSingleItem(cartAdapter.cartItemName.get(id));

                    Log.e(TAG, "onDismiss: " + subdata.get(id) + " " + data.get(id));
                    subdataprice.remove(id);
                    subdata.remove(id);
                    addonlist.remove(id);
                    price.remove(id);
                    data.remove(id);
                    cartAdapter.notifyItemRemoved(id);

                    Log.e(TAG, data.size() + " onDismiss: size " + subdata.size());
                    totalPriceTextView.setText(String.valueOf(getTotal()));
                    cartAdapter.updateRecycler();
                }
            })
            .setIsVertical(false)
            .setItemClickCallback(new SwipeDismissRecyclerViewTouchListener.OnItemClickCallBack() {
                @Override
                public void onClick(int i) {
                    // Toast.makeText(getBaseContext(), String.format("Delete item"), Toast.LENGTH_LONG).show();

                }
            })
            .create();
    recyclerView.setOnTouchListener(listener);

这是RecyclerView滑动删除的代码。在我的购物车适配器中，我采用了另一个回收视图。任何想法如何通知适应如果从回收视图中删除任何数据。？？？

我的 onBindViewHolder Class

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

    try {
        holder.itemName.setText(String.format("%s", cartItemName.get(position)));
        holder.itemPrice.setText(String.format("£  %s", cartItemPrice.get(position)));

        AddonRecycleviewAdapter recycleViewAdapter = new AddonRecycleviewAdapter(context, listsubdata.get(position), listsubprice.get(position), listsubAddon.get(position));
        holder.addon_recycleview.setHasFixedSize(true);
        holder.addon_recycleview.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false));
        holder.addon_recycleview.setAdapter(recycleViewAdapter);


    } catch (Exception e) {
        e.printStackTrace();
    }
}

父 Recycleview

   <android.support.v7.widget.RecyclerView
                android:id="@+id/cartRecyclerView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="2dp"
                android:clipToPadding="false"
                android:padding="@dimen/item_gallery_padding"
                app:layout_behavior="@string/appbar_scrolling_view_behavior" />

子回收视图

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">


<ImageButton
    android:visibility="invisible"
    android:id="@+id/btnremove"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_margin="@dimen/standard_padding_small"
    android:background="@null"
    android:src="@drawable/ic_action_action_search"
    android:text="Remove" />


<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="@dimen/standard_padding_small"
    android:gravity="center_vertical"
    android:padding="8dp"
    android:text="+" />


<TextView
    android:id="@+id/addonNameTextView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="@dimen/standard_padding_small"
    android:layout_weight="1"
    android:ellipsize="end"
    android:gravity="center_vertical"
    android:maxLines="1"
    android:padding="8dp"
    android:text="9 inch Pizza"
    android:textAppearance="?android:attr/textAppearanceSmall"
    android:textColor="@color/secondary_text" />

<TextView
    android:id="@+id/addOnPriceTextView"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_margin="@dimen/standard_padding_small"
    android:gravity="center_vertical"
    android:maxLines="1"
    android:text="£3.15"
    android:padding="8dp"
    android:textAppearance="?android:attr/textAppearanceSmall"
    android:textColor="@color/primary_text" />
</LinearLayout>

Answer 1

首先 为什么你甚至需要一个回收器视图在另一个？ 它通常通过可扩展的回收器视图来解决。 Here is a nice tutorial.

其次，我看到这一行 cartAdapter.notifyItemRemoved(id); 第二个回收商的通知在哪里？你上面有 link 吗？你应该打电话给notifyDataSetChanged()！

而且 天哪，有这么多匿名者类！ 我什至无法理解您的代码中发生了什么！简直无法理解。认真地摆脱那些东西。

Answer 2

像这样尝试：

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

                try {
                    holder.itemName.setText(String.format("%s", cartItemName.get(position)));
                    holder.itemPrice.setText(String.format("£  %s", cartItemPrice.get(position)));

                    AddonRecycleviewAdapter recycleViewAdapter = new AddonRecycleviewAdapter(context);
                    holder.addon_recycleview.setHasFixedSize(true);
                    holder.addon_recycleview.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false));

                    //Create a setter method in AddonRecycleviewAdapter  adapter
                    holder.addon_recycleview.setLists(listsubdata.get(position), listsubprice.get(position), listsubAddon.get(position));
                    holder.addon_recycleview.setAdapter(recycleViewAdapter);



                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

在你的 setter 中这样做：

//set list of items from ParentAdapter in your AddonRecycleviewAdapter adapter
    public void setLists(List<T> l1,List<T> l2,List<T> l3) {
        //Set You list as field variable here        
        this.l1 = l1;
        this.l2 = l2;
        this.l3 = l3;
        this.notifyDataSetChanged();
    }

Answer 3

今天我终于从另一个方面得到了答案我只是在 synchronized

中调用适配器

synchronized(recyclerview){
     recycleViewAdapter = new AddonRecycleviewAdapter(context, listsubdata.get(position), listsubprice.get(position), listsubAddon.get(position));
    holder.addon_recycleview.setHasFixedSize(true);
    holder.addon_recycleview.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false));
    holder.addon_recycleview.setAdapter(recycleViewAdapter);
}

如何在另一个recyclerview适配器下使用recyclerview适配器？

How to recycleview adapter under another recycleview adapter?

android

android-adapter

notifydatasetchanged

android-recyclerview