Gain insights into MVVM architecture in Android with Kotlin. Learn about networking with Retrofit, local storage with Room, and pagination. Discover how to build scalable, maintainable apps.

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The course focuses on the MVVM (Model-View-ViewModel) architecture in Android development using Kotlin. The MVVM is widely recommended due to its robustness, scalability, and ease of maintenance. It is a valuable skill to have for building high-performance Android applications.

Firstly, you will learn the basics of MVVM architecture and its advantages over other approaches to Android development. Then, you'll start from scratch and create layouts for a news application. Next, you'll use the Retrofit and OkHttp networking libraries and get to familiarize yourself with APIs. You'll get hands-on experience in storing data locally via the Room library. Finally, you'll be introduced to both the repository and ViewModel patterns, as well as how to work with the Paging library and deliver data to our fragments.

By the time you’re done with the course, you’ll be able to use MVVM in your Android projects, interact with APIs, store data locally, and implement pagination.

Mastering MVVM Architecture in Android Development using Kotlin

# Data classes
Data classes are used to hold data. They’re marked with the `data` keyword to tell the compiler that we’re creating this class to hold data so that it can automatically create the necessary functions to handle and process data.

data class User(val name:String, val age:Int)

A `data` class contains `state` and `fields`. For a class to be considered a data class, the following must be true:

- The primary constructor should have at least one parameter.
- Each parameter must indicate if it’s a `val` or `var`.
- Data classes cannot be `abstract`, `sealed`, `open,` or `inner`.
They can extend other classes.



## The `data` class methods

The `data` class has methods that are automatically generated when the compiler notices the class is meant to hold data and to keep our code concise. We don’t need to write a lot of boilerplate code. These methods are listed below, along with a corresponding code snippet for each.

## `toString()` method

This method returns a `string` representation of our `data.` If we were to write the class without the `data keyword,` the code would return a hashcode, not a `string` representation of the `data`.

Let’s look at an example:



Learn about the standard functionality of data classes and their purpose.


Introduction

MVVM Architecture

Layouts

Layout Design Assessment

API

Android Web Services Assessment

Utility Classes

Repository Pattern

ViewModel Pattern

Android Business Logic Assessment

Views

Conclusion

Appendix

Data Models

Data classes

The `data` class methods