40.5 Implementing the View Model

With the user interface layout completed, the data model for the app needs to be created within the view model. Within the Project tool window, locate the MainViewModel.kt file, double-click on it to load it into the code editor and modify the class so that it reads as follows:

package com.ebookfrenzy.viewmodeldemo.ui.main

 

import androidx.lifecycle.ViewModel

 

class MainViewModel : ViewModel() {

 

    private val rate = 0.74f

    private var dollarText = ""

    private var result: Float = 0f

 

    fun setAmount(value: String) {

        this.dollarText = value

        result = value.toFloat() * rate

    }

 

    fun getResult(): Float {

     &...