android recycleView嵌套recycleView下拉二级列表显示（带动画）

本文已参与「新人创作礼」活动，一起开启掘金创作之路。 不多说，直接上代码

1、调用方式：

MyAdapter myAdapter = new MyAdapter(this); myAdapter.setmList(list);//list自定义数据 2、MyAdapter类

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> { private Context mContext; private List mList; private ExpandableViewHoldersUtil.KeepOneHolder keepOne;

public void setmList(List<DataIconBean> mList) {
    this.mList = mList;
}

public MyAdapter(Context context, UpDateListener listener) {
    super();
    mContext = context;
}

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

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int viewType) {
    View view = LayoutInflater.from(mContext).inflate(R.layout.item_add_custom_layout, viewGroup, false);
    return new ViewHolder(view);
}

@Override
public void onBindViewHolder(@NonNull final ViewHolder viewHolder, final int position) {
    Log.d("Logger", "MyAdapter onBindViewHolder: " + position);
    keepOne.bind(viewHolder, position);
    if (mList == null) {
        return;
    }
    //TODO第一层显示样式处理
    viewHolder.relativeLayout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            keepOne.toggle(viewHolder);
        }
    });

    viewHolder.iv_editone.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mListener.onEdit(bean);
        }
    });

    viewHolder.img_select.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            keepOne.toggle(viewHolder);
        }
    });

  
    ItemIconAddListAdapter menuAdapter = new ItemIconAddListAdapter(listItemBaseBean);
    //第二层展示样式
    viewHolder.rc_item.setLayoutManager(new GridLayoutManager(mContext, 5));
    menuAdapter.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(@NonNull BaseQuickAdapter<?, ?> adapter, @NonNull View view, int position) {
            //TODO 自己的逻辑
        }
    });
    viewHolder.rc_item.setAdapter(menuAdapter);
}

class ViewHolder extends RecyclerView.ViewHolder implements ExpandableViewHoldersUtil.Expandable, View.OnClickListener, View.OnLongClickListener {
    TextView tv_icon_name;
    ImageView img_select;
    ImageView img_icon;
    ImageView iv_editone;
    RecyclerView rc_item;
    RelativeLayout relativeLayout;

    public ViewHolder(@NonNull View itemView) {
        super(itemView);

        img_icon = itemView.findViewById(R.id.img_icon);
        img_select = itemView.findViewById(R.id.img_select);
        rc_item = itemView.findViewById(R.id.rc_item);
        tv_icon_name = itemView.findViewById(R.id.tv_icon_name);
        relativeLayout = itemView.findViewById(R.id.ll_item);
        keepOne = ExpandableViewHoldersUtil.getInstance().getKeepOneHolder();
        iv_editone = itemView.findViewById(R.id.iv_editone);
        rc_item.setVisibility(View.GONE);
        rc_item.setAlpha(0);
    }

    @Override
    public View getExpandView() {
        return rc_item;
    }

    @Override
    public void doCustomAnim(boolean isOpen) {//旋转指定图片
        if (isOpen) {
            ExpandableViewHoldersUtil.getInstance().rotateExpandIcon(img_select, 90, 0);
        } else {
            ExpandableViewHoldersUtil.getInstance().rotateExpandIcon(img_select, 0, 90);
        }
    }

    @Override
    public void onClick(View view) {
        int position = (int) view.getTag();
        Log.d("Logger", "ViewHolder onClick: ");

    }

    @Override
    public boolean onLongClick(View view) {
        int position = (int) view.getTag();
        Log.d("Logger", "ViewHolder onLongClick: ");

        return false;
    }
}

}

布局文件item_add_custom_layout.xml

<RelativeLayout xmlns:android="schemas.android.com/apk/res/and…" xmlns:app="schemas.android.com/apk/res-aut…" xmlns:tools="schemas.android.com/tools" android:id="@+id/layout_feed_back" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginBottom="13dp"

<RelativeLayout
    android:id="@+id/ll_item"
    android:layout_width="match_parent"
    android:layout_height="56dp"
    android:paddingLeft="13dp"
    android:paddingRight="13dp"
    android:orientation="horizontal">

    <ImageView
        android:id="@+id/img_select"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_marginLeft="2dp"

        android:background="@drawable/icon_left_item_default" />

    <LinearLayout
        android:id="@+id/ll_icon_bg"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_centerVertical="true"
        android:layout_marginLeft="18dp"
        android:layout_toRightOf="@+id/img_select"
        android:background="@drawable/bg_circle"
        android:gravity="center">

        <ImageView
            android:id="@+id/img_icon"
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:layout_centerInParent="true"
            android:src="@drawable/icon_expense_dining" />
    </LinearLayout>

    <TextView
        android:id="@+id/tv_icon_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_marginLeft="19dp"
        android:layout_toRightOf="@+id/ll_icon_bg"
        android:text="餐饮"
        android:textColor="@color/black" />


    <ImageView
        android:id="@+id/iv_editone"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:src="@drawable/icon_dot" />


</RelativeLayout>

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/rc_item"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/ll_item"
    android:background="@drawable/shape_listitem_gray"
    android:paddingLeft="13dp"
    android:paddingRight="13dp"
    android:paddingBottom="15dp" />

3、第二层Adapter

public class ItemIconAddListAdapter extends BaseQuickAdapter<ItemBaseBean, BaseViewHolder> { public ItemIconAddListAdapter(List list) { super(R.layout.item_two_icon_layout,list); }

@Override
protected void convert(@NotNull BaseViewHolder helper, ItemBaseBean data) {
   //TODO
    显示样式

}

}

效果图：