JetCaster 샘플: Horologist 라이브러리를 사용하여 다양한 화면 크기에서 작동하도록 앱을 빌드하는 더 복잡한 예입니다.
앱에서 스크롤 레이아웃 사용
화면을 구현할 때는 이 페이지 앞부분에 표시된 스크롤 레이아웃을 기본 선택으로 사용하세요. 이렇게 하면 사용자가 디스플레이 환경설정이나 Wear OS 기기 화면 크기와 관계없이 앱 구성요소에 액세스할 수 있습니다.
다양한 기기 크기 및 글꼴 크기 조정의 영향
대화상자
대화상자는 스크롤할 수 있어야 합니다(그렇지 않을 만한 타당한 이유가 없는 한).
AlertDialog 구성요소는 반응형이며 콘텐츠가 표시 영역 높이를 초과하는 경우 기본적으로 스크롤할 수 있습니다.
맞춤 화면에는 스크롤되지 않는 레이아웃이 필요할 수 있습니다.
일부 화면은 스크롤되지 않는 레이아웃에 적합할 수 있습니다. 미디어 앱의 기본 플레이어 화면, 피트니스 앱의 운동 화면 등이 여기에 해당합니다.
이 경우 Figma 디자인 키트에 제공된 표준 가이드를 참고하고 올바른 여백을 사용하여 화면 크기에 맞게 반응하는 디자인을 구현합니다.
브레이크포인트를 통해 차별화된 환경 제공
더 큰 디스플레이를 사용하면 콘텐츠와 기능을 추가할 수 있습니다. 이러한 차별화된 환경을 구현하려면 화면 크기 중단점을 사용하여 화면 크기가 225dp를 초과하면 다른 레이아웃을 표시합니다.
constvalLARGE_DISPLAY_BREAKPOINT=225@ComposablefunisLargeDisplay()=LocalConfiguration.current.screenWidthDp>=LARGE_DISPLAY_BREAKPOINT// ...// ... use in your Composables:if(isLargeDisplay()){// Show additional content.}else{// Show content only for smaller displays.}// ...
이 페이지에 나와 있는 콘텐츠와 코드 샘플에는 콘텐츠 라이선스에서 설명하는 라이선스가 적용됩니다. 자바 및 OpenJDK는 Oracle 및 Oracle 계열사의 상표 또는 등록 상표입니다.
최종 업데이트: 2025-08-23(UTC)
[[["이해하기 쉬움","easyToUnderstand","thumb-up"],["문제가 해결됨","solvedMyProblem","thumb-up"],["기타","otherUp","thumb-up"]],[["필요한 정보가 없음","missingTheInformationINeed","thumb-down"],["너무 복잡함/단계 수가 너무 많음","tooComplicatedTooManySteps","thumb-down"],["오래됨","outOfDate","thumb-down"],["번역 문제","translationIssue","thumb-down"],["샘플/코드 문제","samplesCodeIssue","thumb-down"],["기타","otherDown","thumb-down"]],["최종 업데이트: 2025-08-23(UTC)"],[],[],null,["# Develop for different screen sizes\n\nCompose for Wear OS Material version 2.5 3\n\n*** ** * ** ***\n\nYour app should work well on Wear OS devices of all sizes, taking advantage of\nadditional space where available, and still look great on smaller screens too.\nThis guide provides recommendations for achieving this user experience.\n\nTo learn more about the design principles for adaptive layouts, read the\n[design guidance](/design/ui/wear/guides/foundations/adaptive-layouts).\n\n\nBuild responsive layouts using Material 3\n-----------------------------------------\n\nLayouts should have [percentage-based margins](/design/ui/wear/guides/foundations/canonical-adaptive-layouts#non-scrolling-responsiveness). Because Compose works by default in absolute values instead, use `rememberResponsiveColumnPadding` from the [Horologist Library](https://github.com/google/horologist) to calculate the padding and pass it to the `ScreenScaffold`'s `contentPadding` parameter and the `TransformingLazyColumn`'s `contentPadding` parameter.\n\n\u003cbr /\u003e\n\nThe following code snippet uses a\n`TransformingLazyColumn` component to create content that looks great on a variety\nof Wear OS screen sizes: \n\n```kotlin\nval columnState = rememberTransformingLazyColumnState()\nval contentPadding = rememberResponsiveColumnPadding(\n first = ColumnItemType.ListHeader,\n last = ColumnItemType.Button,\n)\nval transformationSpec = rememberTransformationSpec()\nScreenScaffold(\n scrollState = columnState,\n contentPadding = contentPadding\n) { contentPadding -\u003e\n TransformingLazyColumn(\n state = columnState,\n contentPadding = contentPadding\n ) {\n item {\n ListHeader(\n modifier = Modifier.fillMaxWidth().transformedHeight(this, transformationSpec),\n transformation = SurfaceTransformation(transformationSpec)\n ) {\n Text(text = \"Header\")\n }\n }\n // ... other items\n item {\n Button(\n modifier = Modifier.fillMaxWidth().transformedHeight(this, transformationSpec),\n transformation = SurfaceTransformation(transformationSpec),\n onClick = { /* ... */ },\n icon = {\n Icon(\n imageVector = Icons.Default.Build,\n contentDescription = \"build\",\n )\n },\n ) {\n Text(\n text = \"Build\",\n maxLines = 1,\n overflow = TextOverflow.Ellipsis,\n )\n }\n }\n }\n}https://github.com/android/snippets/blob/dd30aee903e8c247786c064faab1a9ca8d10b46e/wear/src/main/java/com/example/wear/snippets/m3/list/List.kt#L53-L96\n```\n\nThis example also demonstrates `ScreenScaffold` and `AppScaffold`.\nThese coordinate between the App and individual screens\n([navigation routes](/training/wearables/compose/navigation)) to ensure the correct scrolling behavior and\n`TimeText` positioning.\n\nFor the top and bottom padding, also note the following:\n\n- The specification of the first and last `ItemType`, to determine the correct padding.\n- The use of `ListHeader` for the first item in the list, because `Text` headers shouldn't have padding.\n\nFull specifications can be found in the [Figma design kits](/design/ui/wear/guides/foundations/download). For more\ndetails and examples, see:\n\n- The [Horologist library](https://github.com/google/horologist) - provides helpers to help build optimized and differentiated apps for Wear OS.\n- The [ComposeStarter sample](https://github.com/android/wear-os-samples/tree/m3/ComposeStarter) - an example showing the principles outlined in this guide.\n- The [JetCaster sample](https://github.com/android/compose-samples/tree/main/Jetcaster) - a more complex example of building an app to work with different screen sizes, using the Horologist library.\n\nUse scrolling layouts in your app\n---------------------------------\n\nUse a scrolling layout, as shown earlier on this page, as the default choice\nwhen implementing your screens. This lets users reach your app's components\nregardless of display preferences or Wear OS device screen size. \n\n*The effect of different device sizes\nand font-scaling.*\n\n### Dialogs\n\nDialogs should also be scrollable, unless there is a very good reason not to.\n\nThe [`AlertDialog`](/reference/kotlin/androidx/wear/compose/material3/package-summary?#AlertDialog(kotlin.Boolean,kotlin.Function0,kotlin.Function0,androidx.compose.ui.Modifier,kotlin.Function0,kotlin.Function0,androidx.compose.foundation.layout.Arrangement.Vertical,androidx.compose.foundation.layout.PaddingValues,androidx.compose.ui.window.DialogProperties,kotlin.Function1)) component is responsive and is scrollable by default\nif the content exceeds the viewport height.\n\n\n### Custom screens might require non-scrolling layouts\n\nSome screens may still be suited to non-scrolling layouts. Several examples\ninclude the main player screen in a media app and the workout screen in a\nfitness app.\n\nIn these cases, look at the canonical guidance provided in the\n[Figma design kits](/design/ui/wear/guides/foundations/download), and implement a design that is responsive to the size\nof the screen, using the correct margins.\n\nProvide differentiated experiences through breakpoints\n------------------------------------------------------\n\nWith larger displays, you can introduce additional content and features. To\nimplement this sort of differentiated experience, use *screen size breakpoints*,\nshowing a different layout when the screen size exceeds 225 dp: \n\n```kotlin\nconst val LARGE_DISPLAY_BREAKPOINT = 225\n\n@Composable\nfun isLargeDisplay() =\n LocalConfiguration.current.screenWidthDp \u003e= LARGE_DISPLAY_BREAKPOINT\n\n// ...\n// ... use in your Composables:\n if (isLargeDisplay()) {\n // Show additional content.\n } else {\n // Show content only for smaller displays.\n }\n // ... \nhttps://github.com/android/snippets/blob/dd30aee903e8c247786c064faab1a9ca8d10b46e/wear/src/main/java/com/example/wear/snippets/m3/list/List.kt#L140-L158\n```\n\nThe [design guidance](/design/ui/wear/guides/foundations/larger-screens-differentiated) illustrates more of these opportunities.\n\nTest combinations of screen and font sizes using previews\n---------------------------------------------------------\n\n[Compose previews](/develop/ui/compose/tooling/previews) help you develop for a variety of Wear OS screen sizes.\nUse both the devices and font-scaling preview definitions to see the following:\n\n- How your screens look at the extremes of sizing, for example, largest font paired with smallest screen.\n- How your differentiated experience behaves across breakpoints.\n\nEnsure you implement previews using [`WearPreviewDevices`](/reference/kotlin/androidx/wear/compose/ui/tooling/preview/WearPreviewDevices) and\n[`WearPreviewFontScales`](/reference/kotlin/androidx/wear/compose/ui/tooling/preview/WearPreviewFontScales) for all the screens in your app. \n\n```kotlin\n@WearPreviewDevices\n@WearPreviewFontScales\n@Composable\nfun ComposeListPreview() {\n ComposeList()\n}https://github.com/android/snippets/blob/dd30aee903e8c247786c064faab1a9ca8d10b46e/wear/src/main/java/com/example/wear/snippets/m3/list/List.kt#L162-L167\n```\n\nScreenshot testing\n------------------\n\nBeyond preview testing, screenshot testing lets you test against a range of\nexisting hardware sizes. This is particularly useful where those devices might\nnot be immediately available to you, and the issue may not present itself on\nother screen sizes.\n\nScreenshot testing also helps you identify regressions at specific locations in\nyour codebase.\n\nOur samples use [Roborazzi](https://github.com/takahirom/roborazzi) for screenshot testing:\n\n1. Configure your [project](https://github.com/android/wear-os-samples/blob/main/ComposeStarter/build.gradle.kts) and [app](https://github.com/android/wear-os-samples/blob/main/ComposeStarter/app/build.gradle.kts) `build.gradle` files to use Roborazzi.\n2. Create a screenshot test for each screen you have in your app. For example, in the ComposeStarter sample, a test for the [`GreetingScreen`](https://github.com/android/wear-os-samples/blob/main/ComposeStarter/app/src/main/java/com/example/android/wearable/composestarter/presentation/MainActivity.kt#L109) is implemented as seen in [`GreetingScreenTest`](https://github.com/android/wear-os-samples/blob/main/ComposeStarter/app/src/test/java/presentation/GreetingScreenTest.kt):\n\n @RunWith(ParameterizedRobolectricTestRunner::class)\n class GreetingScreenTest(override val device: WearDevice) : WearScreenshotTest() {\n override val tolerance = 0.02f\n\n @Test\n fun greetingScreenTest() = runTest {\n AppScaffold {\n GreetingScreen(greetingName = \"screenshot\", onShowList = {})\n }\n }\n\n companion object {\n @JvmStatic\n @ParameterizedRobolectricTestRunner.Parameters\n fun devices() = WearDevice.entries\n }\n }\n\nSome important points to note:\n\n- `WearDevice.entries` contains definitions for most popular Wear OS devices so that the tests are run on a representative range of screen sizes.\n\n### Generate golden images\n\nTo generate images for your screens, run the following command in a terminal: \n\n ./gradlew recordRoborazziDebug\n\n### Verify images\n\nTo verify changes against existing images, run the following command in a\nterminal: \n\n ./gradlew verifyRoborazziDebug\n\nFor a full example of screenshot testing, see the [ComposeStarter](https://github.com/android/wear-os-samples/tree/main/ComposeStarter) sample."]]