Koin —A Kotlin Native Dependency Injection Library

How to scope dependencies

Introduction

As the Android team recommends, if your app contains three or fewer screens, you can go without DI. But with more than three screens, it’s always recommended to use DI.

One of the popular ways to implement DI in Android Apps is through the Dagger framework. But implementing Dagger requires a deep learning curve. One of the best alternatives is Koin, built natively on Kotlin.

If you’ve used Dagger or any DI library, you probably know the importance of scope. It enables us to determine if we’re getting the same dependent object or a new one. It also helps to release unnecessary resources and free up memory.

Scopes in Koin

Scope in Koin is similar to in Android, such as scoping a view-model to a particular activity and using it in the fragments inflated in that activity.

Out of the box, Koin has three kinds of scopes:

• single:Create an object that persistent with the entire container lifetime (Similar to Singleton).

• factory: Create a new object each time — no persistence in the container (can’t be shared).

• scoped: Create an object that persistent tied to the associated scope lifetime.

  

Single returns same instance each time, whereas factory returns new instance on every request.

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AppClues Infotech is a top Mobile App Development Company in USA building high-quality Android, iOS, and Native apps for Startups, SMBs, & Enterprises. Contact us now!

Android projects with source code - Work on real-time android projects. We’ll start project ideas from beginners level and later move to advance projects.

AppClues Infotech is a top Mobile App Development Company in USA building high-quality Android, iOS, and Native apps for Startups, SMBs, & Enterprises. Contact us now!

Hello World, today we are going to see how we can implement a dark theme or night mode in our android application. This tutorial is going to be very simple and easy to understand. The dark theme is attractive to users and it is comfortable for low light conditions.