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PrimeiroFragmento.kt

package com.example.kotlindemo

import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.navigation.fragment.findNavController
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.example.kotlindemo.databinding.FragmentFirstBinding
import com.example.kotlindemo.databinding.ItemViewLinearVerticalBinding

/**
 * A simple [Fragment] subclass as the default destination in the navigation.
 */
class FirstFragment : Fragment(R.layout.fragment_first) {

   
    private var _binding: FragmentFirstBinding? = null

    // This property is only valid between onCreateView and
    // onDestroyView.
    private val binding get() = _binding!!


    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {

        _binding = FragmentFirstBinding.inflate(inflater, container, false)
        return binding.root

    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        binding.buttonFirst.setOnClickListener {
            findNavController().navigate(R.id.action_FirstFragment_to_SecondFragment)
        }

        // List的构建
        binding.recycleList.layoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
        binding.recycleList.adapter = MyAdapter()
    }

    inner class MyAdapter: RecyclerView.Adapter
                                   

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