Public final class User final String final String final String getName() "ĭriverNumber.text = ()ĭtBackgroundColor(getBackgroundColor(isSelected)) // 2 To appreciate the amount of functionality a data class provides automatically, compare the following equivalent code snippets. Utility copy() and componentN() methods.Value equality-based equals() and hashCode() methods.A correct, complete, and readable toString() method.The Kotlin compiler automatically generates the following functionality for them: Kotlin facilitates this use case with data classes.ĭata classes specialize in holding data.
In such classes, the compiler can derive some functionality from its member properties. However, classes that serve only as data models focus on properties. In object-oriented programming ( OOP), a class contains both properties and functions. Then eventually migrate the application to use data classes.īefore you do that, you need to learn more about data classes in Kotlin. So, you’ll implement the missing driver and team building functionality. But the driver selection doesn’t work, and the data models in the application use regular classes.
Tapping the Build Your Team button allows you to select drivers for your team. Then, open the starter project in Android Studio to discover Paddock Builder.īuild and run the app. If you’d like to revisit the basics, consider reading Kotlin for Android: An Introduction first.ĭownload the starter project by clicking the Download Materials button at the top or bottom of the tutorial. Note: This tutorial assumes familiarity with the basics of Kotlin for Android development.
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