Programming Tutorials

Introduction Jetpack Compose, Google's modern toolkit for building native Android UIs, allows developers to create complex interfaces with minimal code. One of its strengths is the ease of customizing elements, such as tabs and indicators. In this article, we'll explore an Android Kotlin example that demonstrates how to create a TabRow with a custom tab indicator using Jetpack Compose. This example highlights how to customize the appearance and behavior of tabs, offering a sleek and visually appealing design for users. This tutorial will break down the provided example code to explain how various Compose elements work together. By the end, you'll understand how to implement and customize a tab layout using Jetpack Compose's declarative UI approach. MainActivity Structure The example begins with the MainActivity , which extends ComponentActivity . This activity serves as the entry point for the Android application. In the onCreate method, the setContent function is in...

Jetpack Compose - Customizing the TabRow Indicator Color in Android Kotlin In this article, we will explore a simple Android Kotlin project using Jetpack Compose that demonstrates how to create a custom TabRow with a modified indicator color. Jetpack Compose, Android's modern toolkit for building native UI, allows developers to easily create and modify UI components declaratively. This example focuses on customizing a TabRow component, highlighting how to set up tabs and modify the appearance of the tab indicator with minimal effort. The code we will break down consists of three main parts: the MainActivity , a Scaffold with a TopAppBar , and a MainContent composable where the TabRow is defined. We'll see how Kotlin and Jetpack Compose's declarative approach enable efficient UI creation, including how to dynamically change the selected tab and display corresponding content. The MainActivity Setup The MainActivity is the entry point of the application. It extends Compo...

Jetpack Compose: How to Use TabRow This code demonstrates how to create a basic tabbed interface using the TabRow composable in Jetpack Compose. It defines three composable functions: MainActivity , GetScaffold , and MainContent . Breakdown: MainActivity: This is the main activity class for the application. It sets the content of the activity using setContent composable and calls the GetScaffold function to define the UI. GetScaffold: This composable defines the overall structure of the app using the Scaffold composable. It includes a TopAppBar with a title and background color, a scrollable content area defined by MainContent , and a background color for the entire scaffold. MainContent: This composable handles the core functionality of the tabbed interface. It uses: remember : This is used to create a mutable state variable selectedIndex to track the currently selected tab index. tabs : This is a list containing the text labels for each tab. Column : This la...