Viewmodel Questions

Let's assume that we have activity/fragment which contains a recyclerview. furthermore, it sets an adapter. for the sake of the example, let's say

I am refactoring applications that pass "application context" to the view model factory and is accessed in the view model. is there a

I am writing unit test for my viewmodel when i run test i am getting following exception lateinit property apiinterface has not

I'm trying to update data in my viewmodel here is my viewmodel; import swiftui import corelocation final class

How i can use shared viewmodel with fragments without activity? like in code but in place of requireactivity() use parentfragment. in this case

My composable is recomposing endlessly after flow collect and navigating to a new screen. i can't understand why. i'm using firebase for

I'm trying to get livedata from room. so my recycleview can have live updates if anything in database is changed i have tried with out

What is viewmodelfactory and when and why should i use it i am new to android and actually i can't understand these concepts in mvvm

I am new to dagger 2 and trying to implement it in kotlin. here i am trying to inject my repository object into viewmodel. i am successfully able

I would like to create a countdowntimer which will trigger events that will update the ui (trigger popup, start an animation,

I want to load tasks in a fragment, in fragment's onviewcreated,i register the livedata observer, in fragment's onresume,i load the

I'm using the navigation component, i want a view model to be shared between a few fragments but they should be cleared when i leave the fragments

This is rather a question for advise then how to. i am using viewmodelscope to launch jobs to interact with my database in my viewmodel.

I want to use android's room + viewmodel components for my app, but i'm not quite sure how. one of my database tables is going to represent

I have a reminder notification that is sent every few days. the sending of that notification is triggered with a repeating

I want to return count of rows from a certain query to my view ,i'm using view model this is my dao class:

I have a lot of fragment base architect component. is this true that i create viewmodel for per

I'm setting up a mvvm pattern in my android app using the viewmodel class from android. now i need to send events (eventually

In my mvvm app, i am extending androidviewmodel and through a repository class, i am trying to get an instance of a db (in a separate

Edit adding the @viewmodelkey and making sure all the viewmodels have the @inject annotation did the trick

We are using in our project koin like di library. in some

I am new to mvvm pattern, and this is a general question for me but i will use a specific example. i have: a data class

I have livedata for books in viewmodel's constructor: livedata<list<book>> books; public

In viewmodel we can apply encapsulation for mutablelivedata as shown in

Context so, i've been working with the mvvm architecture just for a couple of projects. i'm still trying to figure out

I have custom implementation of viewmodel.factory which is provided by lambda injected by dagger2

I followed this room with a

I am working on a viewpager with 6 tabs where it has only one fragment timeslistfragment depending

I was left with some questions regarding viewmodels after reading this:

I'm using coroutines for the first time and i'm having troubles testing my work on a viewmodel. the test fails with

I tried to use livedata transformations.map() to check the result and update the ui. but transformations.map() callback not triggered without an

I am using mvvm architecture to hit a web service through retrofit in android studio. i have handled the response of the service in my view class.

I would like to enable a appcompatbutton when all fields in a form are complete. i am using a viewmodel and would like to use databinding

We have been discussing about this but we don't know the reason of creating a viewmodel factory to create a viewmodel instead of instantiate the

Following the codelab demo from google

My current android application contains a recyclerview that has a checkbox present in each item within the list. my issue is that on

I saw two classes with a similar name, viewmodelproviders, and viewmodelprovider. can anyone explain what are the difference between these

I try get a user from a rest api for do login in my android app for get this i have the next code loginactivity.java

In my asp:net mvc app i have a method as shown below and i try to pass the form data (single item of a list) to the controller. i also need to

I recently started studying android kotlin and i am expecting this to have a very simple answer but i have a viewmodel which has a method called

I'm trying to implement android paging library with viewmodel and kotlin coroutines i have a

I have created sample app to demo my question: a textview and a button, text view visibility is bound to

I'm working on a new project that implements mvvm. can i use a viewmodel that is observed for two activities ? or should i make one viewmodel for

Looking at the google docs for

For java project, in order to recognize android.arch.lifecycle.viewmodelproviders, i simply define the following in my build

I'm using dagger2 for di in android app, i want inject viewmodel in a fragment by androidinjector and have this two line

I am new to kotlin. here is is my java code i wanted to convert it in kotlin public class favouritesviewmodel extends

In a word game app i share a model between an activity and a fragment: public class mainviewmodel extends androidviewmodel {

I am using live data in my application and i have a view model that extends from viewmodel. in my view model, i have a list

I'm trying to use viewmodel together within my earthquakeactivity but i keep getting this error: wrong 1st argument

When dealing with coroutines inside a viewmodel is best to have said viewmodel implement coroutinescope so all coroutines are

Viewmodel's purpose is to retain data on life

My problem is, that i need to preprocess data from the room database before showing it in my view. therefore here some context of

I have an app, which displays 4 lists of words in a fragment (reusing the same class!): 2-letter words 3-letter words

Suppose i have got a list of data in the room db. let the data be: setid, formid, formname. there can be multiple formid in the single setid.

So i have an android application that has a room database, this backend is managed by a class that acts as a repository which feeds my view model,

I have an issue with the preserving bundled data of an activity. certain memory cleaners (such as clean master), as well as the gc of certain

Inside my fragment i initialize a viewmodel using viewmodelproviders. i want it to take its

I'm new with the viewmodel and i understand that it's a powerful and easy way to communicate with fragments. my problem is the following

I'm studying google architecture components with mvvm and noticed that repository sends to constructor of viewmodel. the

I am new in kotlin and i am getting unresolved reference when compiling it can not get a reference to my class, here are both

When app start i need to download data and populate all viewmodels to avoid slowdowns during the app usage. first activity is:

I have 1 activity that only displays and deletes notes from a

In kotlin i'm using viewmodel = viewmodelproviders.of(this).get(homeviewmodel::class.java) to retrieve a

I'm an android beginner, and just looking for some advice with regard to app architecture - specifically relating to using viewmodels. there is no

I have been coding into flutter and is wondering if there is any kind of viewmodel thing that is supported in flutter. main purpose of viemodel

I try understanding viewmodel. i create viewmodel: public class usersviewmodel extends viewmodel { private final

This will create myviewmodel object with default or zero parameters. myactivity

Are viewmodels independent of activity/fragment lifecycles or just their configuration changes. when will they cease to exist and the subsequent

I am new to android arch components. i am trying to make a basic todo app using android view model and live data. what is the best way to make

I have an activity that uses the

I'm not sure if i understand viewmodel architecture correctly in android. i suppose viewmodel lifecycle is tie to the activity so we

What is the best way to name methods in the viewmodel classes? based on its action/behavior or the lifecycle of the

For android mvvm architecture, in all the examples that i have seen, people either use room to store/retrieve data or they get data directly from

I found a case when architecture components viewmodel isn't retained - in short it goes as follows: activity is started

I was trying to fetch a list of custom object data from room using livedata and viewmodel. while using livedata's getvalue() method, returns null

Scenario i have a quizz generator, which generates a sequence of quizzes of different classes. the sequence is of unlimited length.

I have a method getrandomwordfornotification in viewmodel(watch listfragment) which returns random word from database. and i want to show returned

I am trying to use exoplayer in my app, and i am following mvvm design pattern, i want to make playerviewmodel class where it handle all the

I'm learning kotlin and android architecture components. i have a simple use case of a map toggle button on a google map. i want to use

I've been trying to share information between fragments using viewmodel's and livedata's. but when i change from first fragment to

I'm currently trying to share data between my two fragments with the help of a view model

Take the following simplified viewmodel: const observablemodule = require("tns-core-modules/data/observable"); function

After initializing my viewmodel from the activity, i initialize the sharedpreference variable (sharedprefs) in the viewmodel from the

I am developing android app and i have implemented success and failure cases in viemodel class but i am getting following mismatch type mismatch.

I'm learning koin right now and here is my trouble. when i'm trying to run the application, i get this error: kt:23) at

I have an activity. this activity is receiving some arguments. at the moment, i'm able to create a viewmodel with those parameters

Public class mainactivity extends activity { @override protected void oncreate(bundle savedinstancestate) {

I recently started with the viewmodel and androidviewmodel, i see there are different approach to initialise a viewmodel instance, for me all

So here's my situation. let's say i have a view called theview.cshtml. theview.cshtml has a viewmodel called

I need to access the data in the nested dictionary of the memodel struct. from both the music and image dictionary. please any help is needed to

As a beginner it is very hard to understand what are these things is there any resource which can give a grasp knowledge of things in easy

A simple androidviewmodel looks like class appviewmodel(application: application) : androidviewmodel(application)

I have a model property which the controller sets to 1 but in my view i see it as 0 and 1 depending on how i access it. view snippet

Inside the viewmodel i've defined 2 stores and i'm using a gridpanel as view. is there any chance to state if else condition for

I have the following model binding. <!-- ko foreach: rctapplyvacancy.rctvacancies --> <tr> // some td

How can i pass an argument from navhostcontroller to my viewmodel init{}?

I'm new to android architecture components and i have read

I'm pretty new to mvc, but now feel pretty comfortable with the pattern, particularly finding viewmodels to be an excellent bridge between