Android MVVM Architecture
MVVM Architecture with Jetpack: ViewModel, LiveData, Data Binding, Separation of Concerns, Unidirectional Data Flow
1What is a ViewModel in Android?
What is a ViewModel in Android?
คำตอบ
A ViewModel is a Jetpack component that stores and manages UI-related data in a lifecycle-aware way. It survives configuration changes (screen rotation) and allows separating business logic from UI.
2How do you create a ViewModel instance in an Activity?
How do you create a ViewModel instance in an Activity?
คำตอบ
Use ViewModelProvider to create or retrieve a ViewModel instance. ViewModelProvider(this).get(MyViewModel.class) ensures you get the same instance even after screen rotation.
3Why should you never pass an Activity or View Context into a ViewModel?
Why should you never pass an Activity or View Context into a ViewModel?
คำตอบ
The ViewModel survives configuration changes and lives longer than Activities. Keeping an Activity Context reference would cause a memory leak. Use AndroidViewModel with Application Context if needed.
What is LiveData?
What is the difference between LiveData and MutableLiveData?
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หัวข้อสัมภาษณ์ Android อื่นๆ
Android Fundamentals
Android UI and Resources
Android Lifecycle
Android Navigation
Android Data Management
Android Networking
Android Testing
Android Gradle
Kotlin Language Essentials for Android
Room Database
Background Work
Jetpack Compose
Permissions and Device Features
Firebase for Android
Advanced Android Networking
Kotlin Collections and Operators
Kotlin Coroutines and Flow
Android Dependency Injection
Android MVI Architecture
Android Clean Architecture
Android Compose Advanced
Android Performance and Monitoring
Android Security and Privacy
Android CI/CD and Release
Android UX and Form Factors
Android Testing Advanced
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