I've set up a room database with 3 columns (title, descriptions, genre). I want to query the genre column with a user-specified genre(comedy, horror, etc) and return the results. DAO Interface I...

In my project i have this window to add new Contact object My Question is how i apply this Validation Attributes to WPF window like i do in Asp.net MVC .. like [Required] and some [ReularExpressi...

I am learning ViewModel and LiveData and, in the process, a doubt arose. What should I do if I need to start an Activity? Is it ok to pass the context as a parameter to the ViewModel (the context...

I have recently upgraded my android studio to version 3.2, and since everywhere I try to access fragment/activity attributes from my ViewModel classes, I get this "Cannot access android.arch.lifecy...

In a word game app I share a model between an activity and a fragment: public class MainViewModel extends AndroidViewModel { private LiveData<List<Game>> mGames; private final Mutabl...

I need to use multiple recyclerviews. In the below scenario I will require at least 6 recyclerviews. 6 = 1 for horizontal recyclerview + 3 for each fragment in viewpager + 1 for recylerview + 1 for...

I have to spend a lot of time learning and implementing Livedata (especially MediatorLivedata) in business logic because it helps to add data from various sources. Had a success with it, because I ...

I am developing an ASP.Net MVC 3 Web application and I am having some difficulties with getting the values from a checkboxlist. I have already read most of the questions on Stackoverflow around thi...

Will the onChanged method be called if we dont change the state of the activity or restart the activity? ( Even if the data changes ) . If it doesnt happen how shall i make it happen ? onCreate() ...

Currently i'm experimenting with viewmodels and was wondering if passing a viewmodel to a recyclerview adapter will cause a memory leak? The only purpose of the viewmodel in the adapter is to give ...

Looking to the code of some Google's demo app (like sunflower or Google io 2018 app) and I've noticed that for the viemodels' backing properties they use a separate instance of the same type with a...

I've used PagedList for loading page of items and display them in RecyclerView, and it is successfully displaying list of numbers(0,1,2,3....,99), the list can always be scroll up and down without ...

Now today, LiveData is very popular, How can i send data from activity to fragment using ViewModel and LiveData or vice-versa ? Please explain with coding example.

I'm new to developing web apps using ASP.NET MVC. In fact, I'm rather new to developing web apps, regardless of technology. Currently, I'm working on a project just to get to know the ASP.NET MVC ...

I have an Activity that contains 3 RecyclerViews. I need populate RecyclerViews with data from remote repository (3 different requests). Can I use multiple ViewModels in the Activity, or is there a...

Note: My question is for using DTO, ViewModel in an .NET/C# project. I know DTO, ViewModel, Models. They have specific purposes. We use DTO to transfer data and ViewModel to show data to an end us...

I have a question that is more related to proper design and architecture of MVVM than to coding itself. In my project I have a situation that on ViewModel is suplying data, that are later used in R...

I am puzzled by a (I thought) simple thing to implement; make a UI element visible depending on a binding to a view model. I use the mvvmlight framework. When the binding (boolean) is set to true t...

I have been beating my head against the wall and I cannot understand why this is happening. I am working with the new Architectural Components for Android and I am having problems updating a LiveDa...

I'm using MVC 4, .Net 4, and Visual Studio 2012. I'm trying to use a fairly complex model with one of my views, and I'm having serious trouble getting it to bind properly. The model wraps a Dicti...

I have an app that runs a service, which should continue working even when the app is closed. I need to share info between them, and I want to try doing this using a ViewModel. I know how to share ...

I am working on a large ASP.NET MVC Project(about 15 separate projects). We are using a Facade Design Pattern to call Business logic as well as other Projects. Question: in MVC application is it ...

I am looking at the https://developer.android.com/topic/libraries/architecture/saving-states. It mention of "system-initiated process death". What does it actually mean?

I wrote an Android app using MVVM where I am calling webservice from ViewModel and storing results in RoomDB. In the View I am observing ViewModel for live data. I need to show ProgressDialog while...

I'm studying Android + Kotlin and make a simple example to understand LiveData + ViewModel. It's very simple: I have one root activity and two fragments. FragmentOne has two EditTexts. That values ...