What is Dependency Injection on Android with Dagger2?

A brief description of what dependency injection is. This is not an actual example of how to use dagger. This is purely conceptual.
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[@thearpansircar]

Just started with this series, but Mitch, here's your engagement.

[@manpreet4743]

I am big fan of you and Florian. But I am bit more towards Florian side since he is better in explaining concepts in deep :) specially dagger part

[@b.k4142]

@singleton one instance of object in memory for entire application.
exemple glide instance, retrovit, instance httpOk, things that never change!

[@breakeract796]

retrofit :))

[@educationey9572]

I have a very strange problem when i use dependency injection when i have Recyclerview in app, most of the times items will be duplicate or getting 3x item, or list won't be updated, and when i develop without DI, it's working fine, i've tried notifychange or etc, but still problem remain...Can u please use recyclerview in pro ways, since u're experienced?Thanks again.

[@codingwithmitch]

I will use a recyclerview, but I'm not injecting anything into it

[@educationey9572]

Hello, can u please do this with multiple activities and subcomponents?

[@codingwithmitch]

yep I will be covering that

[@educationey9572]

Amazing, how about retrofit? or injecting and using libraries (for examples : glide & picaso)?

[@codingwithmitch]

@@educationey9572 yep that too

[@meditaionnation7692]

my question what is dagger2 please and what are used for ? thanks just a curious dude

[@sagarock1012]

Dagger 2 is for Dependency Injection and Dagger Android (which is part of Dagger 2 its more like add on) is to reduce that boilerplate code in Fragments, Activities, or any other Android framework classes that are instantiated by the OS

[@David-yz9mb]

It would be more understandble if when you explain "@Singleton" you show the java code it replaces, most java developers are familiar with singletons I suppose, that annotation isn't more than a replacement for writing the static getInstance()... by yourself.

[@b.k4142]

I m just taking not here : dagger2 help us to architect our code.

[@InvincibleXXX]

A very important subject, but it is a pity that I can not understand what you say, and translator of subtitles is very bad (

[@erlanbulanbekov4703]

What about dependency injection with Koin?

[@codingwithmitch]

Koin is fine. If you like it use it

[@olukayodepaul7070]

still waiting for your short video on uploading image to server with retrofit. Dont mind if you add it to your paid class.

[@codingwithmitch]

That's not a short video lol. Id need to do a lot of stuff server-side before making a "short video".
I'll include it in the next course

[@olukayodepaul7070]

@@codingwithmitch the next course will be when?