# Android Compose 고급 (Android)

> Jetpack Compose 고급: custom layouts, 성능, 애니메이션, 제스처, 테스트

- 17 면접 질문
- Senior
- [면접 질문: Android](https://sharpskill.dev/ko/technologies/android/interview-questions.md)

## 1. Compose에서 Custom Layout을 만드는 방법은?

**답변**

Layout { measurables, constraints -> } 함수를 사용합니다. measurables.forEach { it.measure(constraints) }로 자식을 측정하고, layout(width, height) { placeables.forEach { it.place(x, y) } }로 배치합니다.

## 2. SubcomposeLayout이란 무엇인가요?

**답변**

SubcomposeLayout은 제약 조건이나 다른 자식의 측정값에 기반하여 자식을 동적으로 구성할 수 있습니다. 한 요소의 크기가 다른 요소에 의존하는 레이아웃에 유용합니다 (예: body를 구성하기 전에 header를 측정).

## 3. Compose 생명주기의 3단계는 무엇인가요?

**답변**

3단계는 다음과 같습니다: 1) Composition (UI 트리 생성, @Composable 실행), 2) Layout (요소 측정 및 배치), 3) Drawing (화면 렌더링). 이 단계들을 이해하면 성능 최적화에 도움이 됩니다.

## 14개 추가 질문 이용 가능

- derivedStateOf는 무엇에 사용되나요?
- Compose에서 리컴포지션을 최적화하는 방법은?

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## 기타 Android 면접 주제

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- [Android Testing Advanced](https://sharpskill.dev/ko/technologies/android/interview-questions/android-testing-advanced.md): 18개 질문, Senior

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