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Question 1

Which mixin should be used to observe Flutter app lifecycle state changes?

Accepted Answer

WidgetsBindingObserver is Flutter's official mixin for observing app lifecycle state changes. It needs to be added to the State class and the observer registered with WidgetsBinding.instance.addObserver in initState, then removed in dispose.

Question 2

Which WidgetsBindingObserver method is called when the app lifecycle state changes?

Accepted Answer

The didChangeAppLifecycleState method is called whenever the app lifecycle state changes. It receives an AppLifecycleState parameter indicating the new state of the application (resumed, inactive, paused, detached, hidden).

Question 3

Which AppLifecycleState indicates the app is visible and responding to user input?

Accepted Answer

The resumed state indicates the app is visible, in the foreground, and responding to user input. This is the normal operating state where the user is actively interacting with the application.

Application Lifecycle

Which mixin should be used to observe Flutter app lifecycle state changes?

回答

Which WidgetsBindingObserver method is called when the app lifecycle state changes?

回答

Which AppLifecycleState indicates the app is visible and responding to user input?

回答

When does AppLifecycleState.inactive occur on iOS?

Which AppLifecycleState indicates the app is no longer visible to the user?

その他のFlutter面接トピック

Dart Basics

Dart Language Essentials

Flutter Fundamentals

Widget Lifecycle

Local Storage

Layouts & Constraints

ListView & GridView

Navigation & Routing

Basic State Management

Provider Pattern

Networking & HTTP

JSON Serialization

Local Database

Forms & Validation

Animations

Firebase Integration

Unit Testing

Widget Testing

Build & Deployment

Package Management

Memory & Performance

Streams & RxDart

Advanced State Management

Flutter Design Patterns

Performance Optimization

Platform Channels

Custom Painting

Flutter Application Architecture

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