Programming Tutorials

As Android development evolves, Jetpack Compose and Navigation components have streamlined the way developers build dynamic and responsive user interfaces. However, handling ViewModel instances effectively within these architectures is critical to avoid issues like unnecessary object recreation, memory leaks, or state loss. In this blog post, we’ll explore best practices for managing ViewModels in a navigation setup, whether you’re working with the Navigation Component or Jetpack Compose Navigation . By following these guidelines, you can build apps that are both efficient and maintainable. Understanding the Role of ViewModel in Navigation ViewModel is part of Android’s Architecture Components, designed to store and manage UI-related data in a lifecycle-conscious way. When used in navigation workflows, the ViewModel can: Maintain UI state: Survive configuration changes such as screen rotations. Decouple business logic: Isolate data handling from UI logic, adhering to the MVVM patt...

Jetpack Compose has revolutionized Android development by simplifying UI creation and enhancing code maintainability. Among its many features, the integration with ViewModels plays a crucial role in managing UI-related data and state efficiently. However, to fully harness the power of ViewModels in Jetpack Compose, it’s essential to set up the right dependencies and understand their roles. In this blog post, we will explore the essential dependencies required for using ViewModels in Jetpack Compose, discuss why they matter, and provide practical examples to help you get started. Whether you’re a seasoned developer or a beginner exploring modern Android development, this guide will help you optimize your Jetpack Compose projects. What Are ViewModels in Android? ViewModels are a key component of the Android Architecture Components. They’re designed to store and manage UI-related data in a lifecycle-conscious way, ensuring that data survives configuration changes like screen rotations. By...

In modern Android app development, Jetpack Compose has revolutionized UI creation by introducing a declarative approach that simplifies development and enhances maintainability. However, managing state across composables, particularly sub-screens, can be challenging. ViewModels, part of Android Jetpack, provide a powerful way to handle state in a lifecycle-aware manner, reducing boilerplate code and ensuring smooth app performance. This blog explores how you can simplify sub-screen composables state management using ViewModels. We’ll cover best practices, common pitfalls, and practical examples to help you build scalable and maintainable apps with Compose. Why Use ViewModels for State Management? ViewModels are specifically designed to handle UI-related data in a lifecycle-conscious way. Here’s why they are a great fit for state management in Jetpack Compose: Lifecycle Awareness : ViewModels survive configuration changes like screen rotations, ensuring state persistence. Separation of ...

Jetpack Compose has revolutionized Android UI development by providing a declarative and reactive approach to building user interfaces. One of its key promises is simplicity, but developers often find themselves facing questions about architecture and best practices—one of which is whether to pass ViewModel instances directly into composables. While it might seem convenient to do so, passing ViewModel s into composables can lead to a host of issues that undermine the principles of Compose and modern Android development. In this blog post, we will explore why this practice should be avoided, the potential pitfalls, and better alternatives to ensure clean, maintainable, and testable code. Understanding Jetpack Compose’s Principles Before diving into why passing ViewModel s in composables is discouraged, it’s essential to understand the core principles of Jetpack Compose: Declarative UI : Compose uses a declarative approach, where the UI is defined as a function of the current state. Uni...

Jetpack Compose, the modern toolkit for building native Android user interfaces, has revolutionized how developers approach UI design. With its declarative paradigm and focus on simplifying UI development, understanding core components like ViewModel becomes paramount. In this blog post, we will dive deep into the ViewModel lifecycle in Jetpack Compose, how it integrates with the Compose framework, and best practices to maximize its potential. What is a ViewModel? A ViewModel is a class designed to store and manage UI-related data in a lifecycle-conscious way. Introduced as part of Android Jetpack, the ViewModel's primary purpose is to survive configuration changes like screen rotations and provide a stable source of truth for UI data. In the context of Jetpack Compose, the ViewModel becomes even more critical because Compose’s recomposition mechanism heavily depends on state management. By leveraging ViewModel, you ensure: Separation of concerns between UI and business logic. Sta...

Introduction Jetpack Compose has revolutionized Android UI development by introducing a modern, declarative approach to building user interfaces. Unlike the traditional XML-based UI development, Jetpack Compose enables developers to create dynamic and efficient UIs with less boilerplate code. One of its strengths lies in seamlessly integrating with other Jetpack libraries, including ViewModel, Navigation, and LiveData. In this blog post, we will focus on passing a ViewModel across multiple pages in Jetpack Compose. This is a common requirement in modern Android apps where shared state management and consistent UI behavior are critical. We’ll explore how Jetpack Compose simplifies this process while adhering to Android’s best practices. Whether you’re a seasoned Android developer or just starting out, this guide will provide practical insights to enhance your app development workflow. Core Concepts Related to Jetpack Compose Declarative UI Jetpack Compose adopts a declarative paradigm, ...

Jetpack Compose has revolutionized Android development by introducing a declarative UI framework that enables developers to build modern, efficient, and maintainable user interfaces. As an essential part of Android’s modern development toolkit, Compose simplifies UI creation and state management, allowing developers to focus more on functionality and less on boilerplate code. Among the many key components of Jetpack Compose is the integration of ViewModel, which plays a vital role in managing UI-related data in a lifecycle-aware manner. In this blog post, we’ll dive deep into the two best ways to create a ViewModel in Jetpack Compose, enabling you to harness its full potential in your projects. Why Use a ViewModel in Jetpack Compose? ViewModel, part of the Android Jetpack library, is designed to store and manage UI-related data in a lifecycle-conscious way. It ensures data survives configuration changes, such as screen rotations, making it a crucial component for creating robust Androi...

Introduction In the rapidly evolving landscape of Android development, Jetpack Compose has emerged as a game-changing toolkit for building modern, efficient, and declarative UIs. By simplifying UI creation and eliminating the need for XML layouts, Jetpack Compose empowers developers to focus on crafting seamless user experiences. Among the many Jetpack libraries that integrate seamlessly with Compose, ViewModel stands out as a vital component for managing UI-related data in a lifecycle-aware manner. This blog post explores the core concepts behind ViewModel integration with Jetpack Compose, offering practical guidance, best practices, and code examples to help you effectively manage state and build responsive Android applications. Whether you’re a seasoned developer or just getting started with Compose, this guide will equip you with the tools to enhance your app development process. Core Concepts in Jetpack Compose Jetpack Compose is a declarative UI toolkit designed to streamline And...

Introduction This code demonstrates a Jetpack Compose application that utilizes Room database to manage employee data. The application allows adding new employees, deleting existing ones, and clearing all data. It leverages ViewModel to manage the data state and provide a single source of truth for the UI. Breakdown The code is organized into several classes: MainActivity.kt : This is the main activity that sets the content of the app using a Composable function called MainContent . MainContent.kt : This composable function builds the UI for the app. It retrieves data from the ViewModel, displays the number of employees, and presents a list of employees. It also provides buttons for adding new employees and clearing all data. RoomSingleton.kt : This class defines a Room database named "roomdb" with a single entity - Employee . It provides a singleton instance using the getInstance method. Employee.kt : This data class represents an employee with an ID (Long) and a ...