viewmodel

问题 So, I am using Koin for dependency injection, Here is what I did inside a activity class ModuleDetailActivity : AppCompatActivity() { private lateinit var moduleId:String private lateinit var levelModule:Level.Module private val moduleViewModel: ModuleViewModel by viewModel { parameterOf(moduleId, levelModule) } override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) ... ... moduleId = intent.getString("module_id") levelModule = intent.getParcelable("level

问题 So here's my situation. Let's say I have a view called TheView.cshtml. TheView.cshtml has a ViewModel called TheViewModel.cs . In TheViewModel.cs , resides a List of an object ( TheObject ) called TheObjectList . I have an editor template for TheObject called TheObject.cshtml . Using this editor template, I can simply display all of the items in the TheObjectList with @Html.EditorFor(model => model.TheObjectList) . However, now I want to dynamically add objects to this list. I have a AJAX

问题 So here's my situation. Let's say I have a view called TheView.cshtml. TheView.cshtml has a ViewModel called TheViewModel.cs . In TheViewModel.cs , resides a List of an object ( TheObject ) called TheObjectList . I have an editor template for TheObject called TheObject.cshtml . Using this editor template, I can simply display all of the items in the TheObjectList with @Html.EditorFor(model => model.TheObjectList) . However, now I want to dynamically add objects to this list. I have a AJAX

问题 I am using only dagger2 ( not dagger-android ) in my project. It's working fine to inject the ViewModel using multibinding. But there's one problem with that previously without dagger2 I was using the same instance of viewmodel used in activity in multiple fragments (using fragment-ktx method activityViewModels()), but now since dagger2 is injecting the view model it's always gives the new instance (checked with hashCode in each fragment) of the viewmodel for each fragment, that's just breaks

问题 This issue was originally observed in a project with MVVM architecture (single activity / multiple fragments) when performing an insert/delete operation to the database and then navigating back to the home fragment. The home fragment then resubscribes to the LiveData in the home ViewModel and LiveData emits twice: One incorrect stale event corresponding to before the database operation A second correct event corresponding to after the database operation I have created a very simple example

问题 I am new to the mvvm pattern. I created a ViewModel for the main activity. Now I want to get an instance of the ViewModel in the main activity. Most Tutorials and answers here on Stackoverflow suggest using ViewModelProviders.of(... , but this is depreceated. So according to this question on stackoverflow: ViewModelProviders is deprecated in 1.1.0 main activity in onCreate, I do the following (and I could swear I already had it running): mainActivityViewModel = new ViewModelProvider(this).get

问题 I am new to the mvvm pattern. I created a ViewModel for the main activity. Now I want to get an instance of the ViewModel in the main activity. Most Tutorials and answers here on Stackoverflow suggest using ViewModelProviders.of(... , but this is depreceated. So according to this question on stackoverflow: ViewModelProviders is deprecated in 1.1.0 main activity in onCreate, I do the following (and I could swear I already had it running): mainActivityViewModel = new ViewModelProvider(this).get

问题 I am trying to implement ViewModel in a 100% Kotlin app. Every piece of documentation I can find says I want to use this to get the ViewModel instance: ViewModelProviders.of(this).get(CustomViewModel::class.java) According to the docs, I should be able to import this with: import android.arch.lifecycle.ViewModelProviders This import is unresolved though. I am using the following in my build file: def androidArchVersion = '1.1.1' implementation "android.arch.lifecycle:viewmodel:

问题 I have built a fragment that basically contains a Recyclerviewer with a custom ViewModel for my Data type using data binding and LiveData (which is a piece of code that I frequently implement) but in this time a runtime exception error has occurred! /AndroidRuntime: FATAL EXCEPTION: main Process: com.example.tdm_project, PID: 9460 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.tdm_project/com.example.tdm_project.MainActivity}: java.lang.RuntimeException: Cannot

问题 I have created ViewModel class, and trying to create an instance of my ViewModel class using ViewModelProvider. At runtime, I'm getting this error "Cannot create an instance of class className ViewModel. Here are the required codes: MainActivity.java public class MainActivity extends AppCompatActivity { MainActivityViewModel mainActivityViewModel; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);