Android Programming: The Big Nerd Ranch Guide, 5th Edition

Adding a New Fragment and ViewModel

The first step is to add a ViewModel to store the List of Crime objects you will eventually display on the screen. As you learned in Chapter 4, the ViewModel class is part of the lifecycle-viewmodel-ktx library. So begin by adding the lifecycle-viewmodel-ktx dependency to your app/build.gradle file (that is, the build.gradle file labeled Module: CriminalIntent.app).

Listing 10.1  Adding lifecycle-viewmodel-ktx dependency (app/build.gradle)

dependencies {
    ...
    implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
    implementation 'androidx.fragment:fragment-ktx:1.4.1'
    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.1'
    ...
}

Do not forget to sync your Gradle files after ...