EN
RU
ES
ZH
FR
DE
PT
AR
HI
alex_dev30
·
How to notify observer when adding an item to a LiveData list?
Hi! I'm new to Android development in Kotlin and trying to understand the MVVM architecture. I have a ViewModel that stores a list of items (e.g., tasks) in LiveData>. I want that when a new item is added to this list, all subscribed observers (e.g., Activity or Fragment) receive a notification and update the UI.
The problem is that LiveData does not track changes inside the list itself. If I just do myList.add(newTask), the observers don't trigger because the reference to the list object remains the same. I tried calling postValue() and setValue() after adding, but that doesn't help.
Here's an example of my code:
```kotlin
class TaskViewModel : ViewModel() {
private val _tasks = MutableLiveData>(mutableListOf())
val tasks
No answers yet.
Log in to leave an answer
Blogs
GraphQL API with Go: Step-by-Step Practical Tutorial
TypeScript: "Element implicitly has an 'any' type" error — analysis and solutions
Returning Iterators in Rust: Secrets of Performance and Zero-Cost Abstractions
Go in Real Projects: 5 Company Cases That Will Surprise You