73.10 Preparing the Main Fragment

The last remaining component to modify is the MainFragment class which needs to configure listeners on the Button views and observers on the live data objects located in the ViewModel class. Before adding this code, some preparation work needs to be performed to add some imports, variables and to obtain references to view ids. Edit the MainFragment.kt file and modify it as follows:

package com.ebookfrenzy.roomdemo.ui.main

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import androidx.lifecycle.Observer

import androidx.recyclerview.widget.LinearLayoutManager

import androidx.recyclerview.widget.RecyclerView

import com.ebookfrenzy.roomdemo.Product

import com.ebookfrenzy.roomdemo.ProductListAdapter

import kotlinx.android.synthetic.main.main_fragment.*

import java.util.*

class MainFragment : Fragment() {

 

    private var adapter: ProductListAdapter? = null

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    override fun onActivityCreated(savedInstanceState...