Final Results

The modified app/build.gradle should resemble:

plugins {
  id 'com.android.application'
  id 'kotlin-android'
  id 'androidx.navigation.safeargs.kotlin'
}

android {
  compileSdk 31

  defaultConfig {
    applicationId "com.commonsware.todo"
    minSdk 21
    targetSdk 31
    versionCode 1
    versionName "1.0"

    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
  }

  buildTypes {
    release {
      minifyEnabled false
      proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
  }

  buildFeatures {
    viewBinding true
  }

  compileOptions {
    coreLibraryDesugaringEnabled true
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
  }

  kotlinOptions {
    jvmTarget = '1.8'
  }
}

dependencies {
  implementation 'androidx.core:core-ktx:1.6.0'
  implementation 'androidx.appcompat:appcompat:1.3.1'
  implementation 'androidx.constraintlayout:constraintlayout:2.1.0'
  implementation "androidx.recyclerview:recyclerview:1.2.1"
  implementation "androidx.navigation:navigation-fragment-ktx:$nav_version"
  implementation "androidx.navigation:navigation-ui-ktx:$nav_version"
  implementation 'com.google.android.material:material:1.4.0'
  implementation "io.insert-koin:koin-android:$koin_version"
  coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.5'
  testImplementation 'junit:junit:4.13.2'
  androidTestImplementation 'androidx.test.ext:junit:1.1.3'
  androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}

(from T14-ViewModel/ToDo/app/build.gradle)

Our new RosterMotor should look like:

package com.commonsware.todo

import androidx.lifecycle.ViewModel

class RosterMotor(private val repo: ToDoRepository) : ViewModel() {
  val items = repo.items
}

(from T14-ViewModel/ToDo/app/src/main/java/com/commonsware/todo/RosterMotor.kt)

ToDoApp should resemble:

package com.commonsware.todo

import android.app.Application
import org.koin.android.ext.koin.androidLogger
import org.koin.androidx.viewmodel.dsl.viewModel
import org.koin.core.context.startKoin
import org.koin.dsl.module

class ToDoApp : Application() {
  private val koinModule = module {
    single { ToDoRepository() }
    viewModel { RosterMotor(get()) }
  }

  override fun onCreate() {
    super.onCreate()

    startKoin {
      androidLogger()
      modules(koinModule)
    }
  }
}

(from T14-ViewModel/ToDo/app/src/main/java/com/commonsware/todo/ToDoApp.kt)

And the altered RosterListFragment should look like:

package com.commonsware.todo

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import org.koin.androidx.viewmodel.ext.android.viewModel

class RosterListFragment : Fragment() {
  private val motor: RosterMotor by viewModel()

  override fun onCreateView(
    inflater: LayoutInflater,
    container: ViewGroup?,
    savedInstanceState: Bundle?
  ): View? {
    return inflater.inflate(R.layout.todo_roster, container, false)
  }
}

(from T14-ViewModel/ToDo/app/src/main/java/com/commonsware/todo/RosterListFragment.kt)

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