Integrate Swift CRUD operations with Kotlin Repository layer. Implement photo display in TaskCard using cross-platform path resolution. Add edit functionality to CreateTaskDialog with StateFlow synchronization…

Adding saveTasks() to write tasks to disk. Implementing updateTask() and deleteTask() in TaskManager with validation. Creating JNI exports to bridge Swift methods to Kotlin. By the end, you’ll have a complete CRUD system where every change persists immediately to disk. Understanding the CRUD Pattern CRUD is a standard acronym…

Connect Swift to Kotlin through Gradle. Configure automated Swift builds, integrate generated Java sources, and use TaskValidator from Kotlin…

File I/O with FileManager across iOS and Android platforms The Result type pattern for explicit, type-safe error handling StateFlow synchronization between Swift and Kotlin You’ll get started by understanding how JSON serialization works. Understanding JSON Serialization with Codable Before you can save tasks to disk, you need…

Create a custom file format for image data exchange and learn how to marshal binary data between Kotlin and Swift…

Your Swift validation logic is integrated with Kotlin - now it’s time to build the app and test it! You’ll verify that Swift correctly validates user input and see the complete system working together. Building the Application Build your app using Gradle. This will trigger the entire build pipeline…

…code manually - it’s all automated! Writing Swift Code Now you’ll write the Swift validation logic. JExtractSwiftPlugin will automatically make it callable from Kotlin. Replace the contents of taskmanager-lib/Sources/TaskManagerKit/TaskManagerKit.swift with: import Foundation // 1: TaskValidator class public class TaskValidator { // 2: Validation constants private static let minTitleLength = 3 private…

…capture in the Android layer. Handled runtime permissions with Compose utilities. Designed a custom file format for binary data exchange. Marshaled image data between Kotlin Bitmap and Swift Data types. Implemented three image processing algorithms in Swift (grayscale, blur, brightness). Understood bidirectional data flow between Kotlin and Swift. Worked with…

…null, maintaining backward compatibility. Validation: Existing validation logic remains unchanged. Task creation: Passes Optional.ofNullable(photoUri) to the Swift Task initializer. This wraps the nullable Kotlin String in a Java Optional, which swift-java maps to Swift’s Optional type. Add to list: Adds the new task to the in-memory…

JSON serialization. Handled binary file management for photos separate from JSON data. Built complete CRUD operations (Create, Read, Update, Delete) across the Swift-Kotlin boundary. Used Result types for explicit, type-safe error handling in Swift. Implemented atomic file writes to prevent data corruption. Handled cross-platform file paths…

…learned the fundamentals of Swift SDK for Android development: Lesson 1: Swift-Java interop basics, building simple computations that bridge Swift and Kotlin. Lesson 2: Camera integration and image processing with SwiftUI-like patterns, capturing photos and applying filters. These lessons taught you how to write Swift code that runs…

Introduces Swift SDK for Android and the concept of hybrid Android apps where Swift handles business logic while Kotlin manages the native…

Lesson 1, you learned how Swift business logic integrates with Kotlin UI through automatic Java bindings. Your Task Manager validates tasks using Swift, demonstrating basic data flow between languages. In this lesson, you’ll add photo capture and image processing to the Task Manager. You’ll integrate Android’s CameraX…

Encodes width and height as 8 bytes (big-endian). Write pixels: Appends processed pixel data and saves to disk. This function is called from Kotlin through the JNI bindings generated by swift-java. It handles the complete process of reading a custom format file, applying the requested filter, and writing…

…create a camera preview UI with Jetpack Compose. Camera access requires handling Android platform APIs and runtime permissions, which you’ll implement in the Kotlin layer. The captured photos will later be processed in Swift, demonstrating how platform integration and business logic can live in different layers. Getting Started Access…

Congratulations! You’ve just built a hybrid Android application using Swift SDK for Android. By combining Swift’s business logic with Kotlin’s native UI, you’ve created a Task Manager app that leverages the strengths of both languages. Key Takeaways Swift SDK for Android enables you to write Swift…