应用fragment中的recyclerview点击事件，实现分类列表式侧边栏

我在fragment中的recyclerview设置了点击事件，实现了一个分类列表式侧边栏的效果

左边一列的recyclerview显示线路名称，选择后会显示本线路的站点，可以下滑浏览。

效果展示：

 主要代码：

xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    tools:context=".fragment.frag2.LeftListFragment">

    <!-- TODO: Update blank fragment layout -->
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/frag_recycle_left"
        android:layout_width="105dp"
        android:layout_height="628dp"
        android:layout_margin="1dp"
        android:background="@drawable/bg_bg2"
        android:padding="3dp" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/frag_recycle_right"
        android:layout_width="308dp"
        android:layout_height="628dp"
        android:layout_marginLeft="105dp"
        android:layout_marginTop="1dp"
        android:layout_marginRight="1dp"
        android:background="@drawable/bg_bg1"
        android:padding="3dp" />


</FrameLayout>

fragment

package com.example.dataapplication.fragment.frag2;

import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.example.dataapplication.DataBase.CRUD;
import com.example.dataapplication.R;
import com.example.dataapplication.adapter.LeftListAdapter;

import java.util.ArrayList;
import java.util.List;

public class LeftListFragment extends Fragment {
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";
    private String mParam1;
    private String mParam2;
    private RecyclerView mList,mList2;
    private List<String> mData,mData2;

    private LeftListAdapter mAdapter,mAdapter2;
    public LeftListFragment() {

    }
    public static LeftListFragment newInstance(String param1, String param2) {
        LeftListFragment fragment = new LeftListFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_left_list, container, false);
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        mList = view.findViewById(R.id.frag_recycle_left);
        mList2 = view.findViewById(R.id.frag_recycle_right);
        initData1();

    }


    private void initData2(int position) {
        mData2 = new ArrayList<String>();
        CRUD crud = new CRUD(getContext());
        //导入数据
        ArrayList<String> subList = crud.PositionStation(position);

        for (int i = 0; i < subList.size(); i++) {

            String stationData = subList.get(i);
            mData2.add(stationData);
        }
        //设置布局管理器
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
        mList2.setLayoutManager(linearLayoutManager);
        //创建适配器
        mAdapter2 = new LeftListAdapter(mData2);
        //设置到listview里
        mList2.setAdapter(mAdapter2);
    }

    private void initData1() {
        mData = new ArrayList<String>();
        CRUD crud = new CRUD(getContext());
        //导入数据
        ArrayList<String> subList = crud.getArrayLine();

        for (int i = 0; i < subList.size(); i++) {

            String stationData = subList.get(i);
            mData.add(stationData);
        }
        //设置布局管理器
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
        mList.setLayoutManager(linearLayoutManager);
        //创建适配器
        mAdapter = new LeftListAdapter(mData);
        //设置到listview里
        mList.setAdapter(mAdapter);

        mAdapter.setOnItemClick1(new LeftListAdapter.OnItemClickListener1() {
            @Override
            public void OnItemClick1(int position) {
                initData2(position);
            }
        });

    }
}

crud

@SuppressLint("Range")
    public ArrayList<String> PositionStation(int position){

        SQLiteDatabase db = dbHelper.getReadableDatabase();
        ArrayList<String> ArrayOnly = new ArrayList<>();
        int number = 1;
        switch (position){
            case 0:number = 1;
            break;
            case 1:number = 2;
                break;
            case 2:number = 8;
                break;
            case 3:number = 4;
                break;
            case 4:number = 5;
                break;
            case 5:number = 6;
                break;
            case 6:number = 7;
                break;
            case 7:number = 9;
                break;
            case 8:number = 11;
                break;
            case 9:number = 10;
                break;
        }
        String the_line = number+"号"+"线";
        String sql = "Select * From bj_subway2 Where line_name=?";
        Cursor cursor = db.rawQuery(sql,new String[]{the_line});
        int i=0;
        if (cursor.moveToFirst()){
            do {
                    i++;
                    String a = cursor.getString(cursor.getColumnIndex("station_name"));
                    ArrayOnly.add(a);
            }while (cursor.moveToNext());
        }

        if(i==0)
        {
            return null;
        }
        cursor.close();
        db.close();
        return ArrayOnly;
    }