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  • Jetpack Compose Annotated Strings and Brush Styles

    The previous chapter explored how we use modifiers to change the appearance and behavior of composables. Many examples used to demonstrate modifiers involved the Text composable, performing tasks such as changing the font type, size, and weight. This chapter will introduce another powerful text-related feature of Jetpack Compose, known as annotated strings. We will also…

  • How to Use Modifiers in Jetpack Compose

    In this chapter, we will introduce Compose modifiers and explain how they can be used to customize the appearance and behavior of composables. Topics covered will include an overview of modifiers and an introduction to the Modifier object. The chapter will also explain how to create and use modifiers, and how to add modifier support…

  • A Jetpack Compose Slot API Tutorial

    In this chapter, we will be creating a project within Android Studio to practice the use of slot APIs to build flexible and dynamic composable functions. This will include writing a composable function with two slots and calling that function with different content composables based on selections made by the user. About the project Once…

  • An Overview of Jetpack Compose Slot APIs

    Now that we have a better idea of what composable functions are and how to create them, it is time to explore composables that provide a slot API. In this chapter, we will explain what a slot API is, what it is used for and how you can include slots in your own composable functions.…

  • A Jetpack Compose Composition Local Tutorial

    We already know from previous chapters that user interfaces are built in Compose by constructing hierarchies of composable functions. We also know that Compose is state-driven and that state should generally be declared in the highest possible node of the composable tree (a concept referred to as state hoisting) and passed down through the hierarchy…

  • Jetpack Compose State and Recomposition

    State is the cornerstone of how the Compose system is implemented. As such, a clear understanding of state is an essential step in becoming a proficient Compose developer. In this chapter, we will explore and demonstrate the basic concepts of state and explain the meaning of related terms such as recomposition, unidirectional data flow, and…

  • Jetpack Composable Functions Overview

    Composable functions are the building blocks used to create user interfaces for Android apps when developing with Jetpack Compose. In the ComposeDemo project created earlier in the book, we made use of both the built-in compose functions provided with Compose and also created our own functions. In this chapter, we will explore composable functions in…

  • An Overview of Jetpack Compose

    Now that Android Studio has been installed and the basics of the Kotlin programing language covered, it is time to start introducing Jetpack Compose. Jetpack Compose is an entirely new approach to developing apps for all of Google’s operating system platforms. The basic goals of Compose are to make app development easier, faster, and less…

  • An Introduction to Kotlin Inheritance and Subclassing

    In The Basics of Object-Oriented Programming in Kotlin we covered the basic concepts of object-oriented programming and worked through an example of creating and working with a new class using Kotlin. In that example, our new class was not specifically derived from a base class (though, in practice, all Kotlin classes are ultimately derived from…

  • The Basics of Object-Oriented Programming in Kotlin

    Kotlin provides extensive support for developing object-oriented applications. The subject area of object-oriented programming is, however, large. As such, a detailed overview of object-oriented software development is beyond the scope of this book. Instead, we will introduce the basic concepts involved in object-oriented programming and then move on to explain the concept as it relates…