Android Development Tutorial – MVVM Design Patterns Login Validation

this simple login application is made by MVVM, we have to Create so many classes and methods. so can you please elaborate me what are the benefits and advantges for using MVVM in this app?

package name must need 1) lowercase 2) don't use System Keyword : ex) interface etc…

When in Kotlin?

How can we show Confirmation alert dialog using MVVM ?

app:onClick="@{loginmodelView::onLoginClicked} this is not accepted by my code instead of that android:onClick="@{(v)-> loginmodelView.onLoginClicked(v)}" this worked WHY?? Following errors also coming whyi resolved but i want o know exact reason of occured issue 1) Identifiers must have user defined types from the XML file. 2)cannot find symbol class LoginFragMvvm BindingImpl.

Thanks 🙂

why do you never speak in your tutorials :(?

error: cannot find symbol class ViewModel

help me.

Nice one. Thanks 🙂

Sir, 
I've follow the tutorial step by step but when I build, the "generatedJava" package have a class "ActivityMainBinding" and there has some error : error: cannot find symbol class ViewModel
when I import it with : import com.example.vincenttieng.perfumemvvm.ViewModel;

Could you help me ? Thanks

"Caution: A ViewModel must never reference a view, Lifecycle, or any class that may hold a reference to the activity context." straight from the android page on ViewModels!

I am sorry, but this is misinformation because it looks like a model view presenter

Great tutorial, but addTextChangedListener just keeps on giving me error that the attribute 'packagename:addTextChangedListener' is not found 🙁

Caution: A ViewModel must never reference a view, Lifecycle, or any class that may hold a reference to the activity context.

This is INCORRECT and one of the worst tutorials I have ever seen TBH! This is hybrid of MVP + MVVM because you are using callbacks and interface to deliver the result (login success or failed). In MVVM, the ViewModel is "Stream" of data / UI State where the View (Activity) "Observes" for the change. You should use RxJava or LiveData for this purpose.
Also the ViewModel shouldn't have the reference to android framework like View, TextWatcher. That's the purpose of MVVM to separate the View with the display and business logic.

please sir talk in your videos.

do you have tutorial bookmarks or favorite

Thank u dear …How i can send and receive data by Bluetooth .. Or ..TCP/server.. Plz.

could you make a Video chat App…..

thanks my master

Isn't it an architectural pattern?

Can you take video about Firebase auth login with Mvp??

Thanks very much man!!!!

yeh dear it's great i suggest you my dear to continues the php and android using mysql database and apply this functionality using php& mysql . thanks for your time .

Make an animation app in flutter

How to program an application to watch movies

Make image spinner which will calculate points . On image there will points which user can able to claims