Architecture Questions

First of all, i know how to build a java application. but i have always been puzzled about where to put my classes. there are proponents for

I was recently introduced to mongodb and going through the installation guide i came to know that we have to first run the daemon (mongod) and

I just wanted to see if i could have your thoughts on the design of some work i am currently doing. here's the current situation -

"main.v:38: error: malformed statement". in adder module call. i want to implement alu in verilog but i got this

I'm making a small application in elm. it displays a timer on the screen, and when the timer reaches zero, it plays a sound. i'm having trouble

I have started using aspects for parameter validation in our development framework. it works nicely, and i enjoy not littering the first half of

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

I have few questions in order to understand the mvvm architecture for ios as below - how is model different from the view-model?

I have to set up pagination for my android project. but i'm a little bit confused since there are two different libraries with same class names

I'm having a problem when dealing with multiple navhosts. this issue is very similar to the one asked

I am getting this error: illegalstateexception: view android.widget.linearlayout{649700d v.e...... ......i. 0,0-0,0} does

I have been trying out navigation component for a while now but somehow not getting the reason (or explanation) behind current lifecycle of

I am using from room and i am using from addmigrations from 1 to 2 but say me: expected:

I'm creating an app that interacts with a firestore database. as of now i have a singleton class, databasemanager that has all the

I have a very simple express js server that accepts a request from a client, performs some business logic and respond back to the client. the

I am trying to use the latest update of nav component in my application where i can add dialog(bottomsheetdialogfragment) in

I am trying to understand an

I have a mutablelivedata and i want to add a list inside, but seems the below code doesn't work:

I recently updated my dependencies to include the onbackpressedcallback change from an interface into an abstract class. i

I'm using the navigation architecture component in my single activity app and it works fine but what i'm facing is that in one of the fragments i

I am using bottom navigation with

I am refactoring our codebase. right now we have a singleton repository which ceates network requests and manages operators chaining with rxjava

Input validation is a business logic so we should hide this process in the domain layer. as discussed

I have this in app gradle: apply plugin: 'androidx.navigation.safeargs' implementation

I'm trying to use two-way databinding on a edittext, that works fine if i expose the field as mutablelivedata as it is usually seen on examples i

I am currently using bottom navigation like in

I am trying to send a bytearray as an input data to my worker class inside the workrequest. is there a way to send bytearray and receive the same

I have implemented navigation drawer with navigation components in android. i have 5 fragments that i want to go back to my

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 am trying to use the navigation component to show a date picker dialog fragment. i am getting the following error:

In the android docs, it states: the navigation component is designed for apps that have one main activity with multiple

I am building a service where each user will be able to have a long running task (think web scraper). an express api will be used to manage users

I have simple login in my app which validates username and password in server side and base on that show a toast message.

I want to implement an androidx-navigation by using

I'm trying to use android workmanager in an application in order to schedule some background task. the requirement is to cancel the api request

I have completed reso coder tutorial about clean architecture with tdd in flutter apps. but there are two points

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

I have screen like below which contain a navigation drawer and bottom navigation on same screen:

I'm showing a fragment using the androidx navigation architecture component. the fragment is shown by an arcmotion shared element

I'am using laravel + nuxt for current project. web app has user pages and admin pages. user pages are working in laravel + nuxt spa but admin

When working with objects in a certain manner, my code tends to get unreadble. i am looking for some ideas to change my architecture to make it

I have a multi-module project, where i need to handle deep-linking within the app. the deep-links can be to any feature module with it's own

I'm using the single activity multi fragments with navigation component.how do i hide the bottom navigation bar for some of the fragments?

I have a node rest api using express and javascript. i created a database class that is able to connect, disconnect and execute the

In an app i'm working on, i need to very simply fetch data from a room database. there are relations involved. everything was working perfectly

I would like to change the menu items displayed in my actionbar depending on the current destination of my

I've been using mvp for a long time now and i'm starting to transfer to a hybrid state between mvp and mvvm in detail my apps will go like

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

I want to design a cross-platform (android, ios, and web) plugin-able software that means everyone can easily develop a plugin for it and users

I want to have a backbutton in the default actionbar on an new androidx jetpack navigation app. i follow the google

Navigation component crash on the device rotate 2019-04-15 11:50:08.589 21493-21493/me.rankov.kaboom e/androidruntime: fatal

I really backed myself into a corner & have no idea how to re-design to fix this smoothly while keeping my functionality. i tried moving the

I am using dagger 2 and i have a dicomponent defined as follows: @singleton @component(modules = {

I use navigation component in project. trying to set up shared element transitions from recycler. and enter transition in the second fragment

I am writing some instrumented tests for an app with one activity and multiple fragments using the navigation component. the

Is it really necessary to use usecases in my android clean architecture? in the android jetpack

I'm trying to implement the new navigation component with dynamic features so the structure looks like this: app

I want to inject a new destination to the current nav graph. i notice navgraph has a method void

Hi : ) i am a flutter developer. in clean archtecture the idea of layered architecture, and in particular that the business logic should be

Yesterday i tested my app in some virtual devices in genymotion, and i realized some times, app sends infinite sync requests to the server on some

I'm looking for way to react to events like oncomplete(), onfailure(), ... inside of a viewmodel. for

This is a question mostly about the best practice, i'm new to flutter dev and to the bloc architecture, to summarize i have an app that has an

I have a fragment with viewpager inside it, which contains 3 tabs. i have used jetpack navigation to

I am implementing the flutter project in tdd clean architecture by following this video:

I am developing an application that must be compatible with all android device architectures. also, some of these devices may have uhf reader

All the examples, i have seen, initialize objectbox in a state(less/full)widget. i am using a layered architecture (currently refactoring to ddd)

When i launch my app, i should select start activity, depending on room data. like this: if there is no user (by login string,

In my app i have two activities (authenticationactivity and mainactivity), each one with a nav graph and a big flow of fragments. i've created an

I'm using new android architectural components : mvvm, livedata, etc. as recommended by android documentation as well as in many blogs, in order

I have an app with about 10 work modes. each "mode" works with the same api-endpoints, but differs from others in 2-5 columns that it uses and

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

I recently switched over to android navigation, but have encountered a fair amount of situations (in different parts of the code), where i

So i have an issue with aac navigation. i have multiple fragments in one activity. i inflate the menu options in mainactivity so that each

I am trying to use navigation controller in android

Important links:

I'm using android's aac navigation component and have implemented conditional navigation for my login flow as described in this post:

How does one pass argument(s) to a nested navigation architecture component graph? let's say i construct my navigation graph to navigate

I would like to update some fields from table 1 to be the same as the values from another table (or even a subquery).

I have two domains abc.com and xyz.com pointing to the same nodejs server. based on the domain i want to load the

So i have used the navigation architecture components with java although i followed the codelabds that use kotlin. my code is working but i have

In the navigation library version alpha09+ (using alpha11) i am experiencing a classnotfoundexception for one of my data classes which i defined

Should i make a intent that leads to the mainactivity and then navigate function there. or is there another way?

Trouble i build flutter app + dart. now i am trying to catch all future exceptions in one place (class)

This is a simple example of a navigation setup that i can't get to work with the navigation component library, after researching for some

I want to start a worker that performs some task, and in case of error tries again after some delay with exponential backoff

I have an abstract class like this: public abstract class notificationparent { @serializedname(sercons.c_notification_id)

I'm developing server side app on node.js and i thinking about config file usage. but when i google it.. well as for now i have more

I started build an e-commerce app that allows people buy one item by turn. however, i don't have deep knowledge about flutter app architecture to

I'm using 2 components of the jetpack: paging library and navigation. in my case, i have 2 fragment: listmoviesfragment &

I am trying to inject viewmodel with help of a common viewmodelproviderfactory in dagger2.

I am and android developer and i have worked on all of these three architecture patterns in my applications. also i have gone through several

I am using navigation architecture component library and my app's starting point is this fragment: class mainfragment :

I have android app, size of my android apk file is 25mb. so while creating apk file i want to know how many supported architectures

I am playing with the preview version of androidstudio - 3.4 canary 9. i selected the default login activity option from

I recently saw that google has a great library for paginating data. in this google io:

I'm using the navigation architecture component and i have a setup similar to this one

I have created an animation using xml for fade in and out and attached it to the fragment using the drop down in navigation drop for

I've create simple app using mvvm pattern with livedata to observe data. the list i display is displayed in a fragment. everything seems okay to