Hi guys, how can i know if object wasn’t inserted on Room?

Query return null or -1?

I believe insertion statements can return a list or array of Long, which is their row id

but i find out about the deletion in the adapter

Should report to presenter... no logic in view layer

hm

@oday It makes testing and following logic much easier when the View is a dumb thing passing on UI reactions and doing presenter commands...

In mvp , you should have a interface that the view implements than, the view should report to the presenter that the interraction happen and your presenter should handle the logic accordingly

Your recycler view should never hold reference to your database instance.

Good example would be: https://github.com/grandcentrix/ThirtyInch

Your recyclerview is just a view. Lets say you were to use another view, like a button. You wouldnt expect the button to have reference to your database. No your view would implement the onclickListeren, and let the presenter know that the button was clicked

So thing with recycleeview except you create the interface

you’re explaining MVP

im talking about a case where what im interested in is inside the recycler adapter

that’s where the event I am interested in, happens

ill look into what you posted, i think it will have such an example

whatever event happens on your adapter is delegated to the presenter

so the adapter has to have a reference to the presenter

through listeners, most likely

nope

ah ok, a listener

as mentioned above, the adapter is a view and should behave as such

if the activity doesn’t make decisions related to the DB, why would it be different with the adapter?

You could always use RxJava, there's plenty of libs to make listeners out of any view interactions... then in the view class you expose those observables and listen to them on the presenter..

Yea already using that for something else, ill see how I can do that here in this case

Could do something like this: https://blog.mindorks.com/recyclerview-item-click-using-rxjava2-993fc0c78047

and expose the observable to the View interface...

there is no need for this , just create a listener. and have the view implement it

you don’t need Rx to do it

fun setOnActionDelete(listener: () -> Unit) and involk it in the onclick listener of the view that is being clicked on