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It is a common requirement when designing user interface layouts to present information in either scrollable list or grid configurations. For basic list requirements, the Row and Column components can be re-purposed to provide vertical and horizontal lists of child composables. Extremely large lists, however, are likely to cause degraded performance if rendered using the…

When an Android application is first started, the runtime system creates a single thread in which all application components will run by default. This thread is generally referred to as the main thread. The primary role of the main thread is to handle the user interface in terms of event handling and interaction with views…

As we already know from the previous chapters, one of the ways that Compose can render user interface layouts quickly and efficiently is by limiting each composable to being measured only once during a recomposition operation. Situations sometimes arise, however, where a parent composable needs to know size information about its children before they are…

In the previous chapter, we introduced ConstraintLayout and explained how the key features of this layout manager can be used to create complex and responsive user interface designs. This chapter will describe how ConstraintLayout is used within Compose layouts while providing example implementations of the various ConstraintLayout features you can combine to design your layouts.…

So far in this book, we have introduced the Box, Column, and Row layout components provided with Compose and shown how these are used to layout child elements in an organized way. We have also covered the creation and use of custom layout modifiers and explored how these can be used to modify the position…

Although the Box, Row, and Column composables provide a great deal of flexibility in terms of layout design, situations will inevitably arise where you have a specific layout requirement that cannot be achieved using the built-in layout components. Fortunately, Compose includes several more advanced layout options. In this chapter, we will explore one of these…

Now that we understand what FlowRow and FlowColumn are and how they work, we can put his knowledge to practical use. In this chapter, we will create a project demonstrating these Flow layout components in action. Creating the FlowLayoutDemo project Launch Android Studio and select the New Project option from the welcome screen. Choose the…

Now that we have an understanding of the Compose Row and Column composables, we will move on to look at the third layout type provided by Compose in the form of the Box component. This chapter will introduce the Box layout and explore some of the key parameters and modifiers that are available when designing…

User interface design is largely a matter of selecting the appropriate interface components, deciding how those views will be positioned on the screen, and then implementing navigation between the different screens of the app. As is to be expected, Compose includes a wide range of user interface components for use when developing an app. Compose…