Build Modern Android Apps with Kotlin, Compose & MVVM

Discover how Kotlin is a statically typed, concise language fully interoperable with Java, enabling mixed Kotlin and Java code in one project and multiplatform targets Android, iOS, desktop, and web.

Learn to write your first Kotlin program by creating a main function, using fun, printing hello world, and running the code in an editor.

Explore the null data type and the billion-dollar mistake, and learn how Kotlin enforces nullability with nullable types. See how first name and middle name can be null or non-null.

Explore Kotlin's safe call operator for handling null values without crashes. Use the question mark and dot operator to conditionally uppercase a nullable middlename and print the result.

Learn to use an if statement as an expression in Kotlin to assign the score result to a variable, enabling cleaner, reusable grid logic with string templates.

Explore Kotlin for loops with ranges, steps, and downTo to print even numbers, count down to new year, and process student scores with if statements in a collection.

Shows how a while loop controls a simulated download from 0 to 100 MB, updates downloaded size with speed, prevents infinite loops, and uses sleep to mimic progress.

Build a number guessing game that uses a while loop to repeatedly prompt for a secret number between 1 and 10, give hints, and celebrate when the guess is correct.

Explore inheritance in Kotlin by overriding methods with the open and override keywords, and implement a custom greeting while leveraging the subclass variables.

Define a generic Kotlin function that prints any type using a type parameter T, showing how a standalone function can handle strings, numbers, and other types without duplication.

Examine abstraction in Kotlin by defining abstract classes and methods, showing only what's necessary and hiding complexity under the hood, while enforcing subclass implementations.

Apply type constraints to generics to enforce type safety, using a generic type T with an account operations interface to show balances and details for saving and current accounts.

Unlock Kotlin extension functions to add new behavior to existing classes without modifying their source, using concise syntax and examples like appending exclamations to strings and calculating list averages.

Explore Jetpack Compose, a declarative Kotlin-based UI toolkit that replaces XML, simplifies state-driven interfaces, reduces boilerplate, and delivers fast, reusable Android app UI.

Master the foundations of Jetpack Compose, from environment setup and app anatomy to layouts, state management, navigation, and a capstone using MVVM, Room, Retrofit, and coroutines.

Navigate between screens using dynamic routes and arguments in Jetpack Compose, passing a contact id through an int argument to a detail screen from a contact list.

Implement the repository pattern to abstract data origins and provide a clean data access API, establishing a single source of truth with local storage and offline-first syncing via WorkManager.

Build a today task component for the home screen with a card, row layout, a checkbox, the title, a due date, and an action chip.

Build a My Task screen composable using a view model and UI state, with tab navigation, a lazy column of tasks, and in-memory filtering in an MVVM pattern.

Build a new task screen with a view model and user interface state. Navigate back after saving using a one-time launch defect, and explore date picker and input handling.

Create a completion rate card in a compose screen using material theme, with a linear progress indicator, padding, typography, and a preview of analytics states to visualize task progress.