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

# Saved news fragment

Create the `SavedNewsFragment.kt` class and remove the boilerplate code before heading over to the layout file. This class will be used to observe and retrieve saved articles selected by the user and display them to the user in a list supported by the `RecyclerView`.


package com.example.ui.fragments

import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.example.newsapplication.R

class SavedNewsFragment : Fragment(R.layout.fragment_saved_news) {

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        }

   }

We add `RecyclerView` in this layout, and the rest of the code remains the same, except when we add a `RecyclerView` to handle the list of saved news. Normally, `Framelayout` is used to hold child views (usually single child views), and this is the reason we have used it here: to hold the `RecyclerView` to block out an area to fit our view without overlapping.

Learn how to create a search bar and a layout for displaying saved news.

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

Saved and Searched News Layouts

Saved news fragment