מעבר מ-Material 2.5 ל-Material 3 ב-Compose ל-Wear OS

implementation("androidx.wear.compose:compose-foundation:1.8.0-alpha02")
implementation("androidx.wear.compose:compose-navigation:1.8.0-alpha02")

@Composable
fun myApp() {
    val dynamicColorScheme = dynamicColorScheme(LocalContext.current)
    MaterialTheme(colorScheme = dynamicColorScheme ?: myBrandColors) {}
}

internal val myBrandColors: ColorScheme = ColorScheme( /* Specify colors here */)
Color.kt

val state = rememberTransformingLazyColumnState()
ScreenScaffold(
    scrollState = state,
    edgeButton = {
        EdgeButton(
            onClick = { },
            modifier = Modifier.scrollable(
                state,
                orientation = Orientation.Vertical,
                reverseDirection = true,
                // Apply overscroll to the EdgeButton for proper scrolling behavior.
                overscrollEffect = rememberOverscrollEffect(),
            ),
        ) {
            Text(stringResource(R.string.show))
        }
    },
) { contentPadding ->
    TransformingLazyColumn(state = state, contentPadding = contentPadding) {
        // additional code here
        // ...
    }
}
Button.kt

AppScaffold {
    val pagerState = rememberPagerState(pageCount = { 10 })

    HorizontalPagerScaffold(pagerState = pagerState) {
        HorizontalPager(
            state = pagerState,
            flingBehavior =
                PagerScaffoldDefaults.snapWithSpringFlingBehavior(
                    state = pagerState
                ),
        ) { page ->
            AnimatedPage(pageIndex = page, pagerState = pagerState) {
                val columnState = rememberTransformingLazyColumnState()
                val transformationSpec = rememberTransformationSpec()

                ScreenScaffold(
                    scrollState = columnState,
                ) { contentPadding ->
                    TransformingLazyColumn(
                        state = columnState,
                        contentPadding = contentPadding,
                    ) {
                        item {
                            ListHeader(
                                modifier = Modifier
                                    .fillMaxWidth()
                                    .transformedHeight(this, transformationSpec)
                                    .minimumVerticalContentPadding(
                                        ListHeaderDefaults.minimumTopListContentPadding
                                    ),
                                transformation = SurfaceTransformation(transformationSpec),
                            ) {
                                Text(text = "Pager sample")
                            }
                        }
                        item {
                            Card(
                                modifier = Modifier
                                    .fillMaxWidth()
                                    .transformedHeight(this, transformationSpec)
                                    .minimumVerticalContentPadding(
                                        CardDefaults.minimumVerticalListContentPadding
                                    ),
                                transformation = SurfaceTransformation(transformationSpec),
                            ) {
                                if (page == 0) {
                                    Text(text = "Page #$page. Swipe right")
                                } else {
                                    Text(text = "Page #$page. Swipe left and right")
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
Pager.kt

@Composable
fun VerticalPagerScaffoldSample() {
    AppScaffold {
        val pagerState = rememberPagerState(pageCount = { 10 })

        VerticalPagerScaffold(pagerState = pagerState) {
            VerticalPager(
                state = pagerState,
                flingBehavior =
                    PagerScaffoldDefaults.snapWithSpringFlingBehavior(
                        state = pagerState
                    ),
            ) { page ->
                AnimatedPage(pageIndex = page, pagerState = pagerState) {
                    ScreenScaffold {
                        Column(
                            modifier = Modifier.fillMaxSize(),
                            horizontalAlignment = Alignment.CenterHorizontally,
                            verticalArrangement = Arrangement.Center,
                        ) {
                            Text(text = "Page #$page")
                            Spacer(modifier = Modifier.height(8.dp))
                            Text(text = "Swipe up and down")
                        }
                    }
                }
            }
        }
    }
}
Pager.kt

val columnState = rememberTransformingLazyColumnState()
val transformationSpec = rememberTransformationSpec()
ScreenScaffold(
    scrollState = columnState
) { contentPadding ->
    TransformingLazyColumn(
        state = columnState,
        contentPadding = contentPadding
    ) {
        item {
            ListHeader(
                modifier = Modifier
                    .fillMaxWidth()
                    .transformedHeight(this, transformationSpec)
                    .minimumVerticalContentPadding(ListHeaderDefaults.minimumTopListContentPadding),
                transformation = SurfaceTransformation(transformationSpec)
            ) {
                Text(text = "Header")
            }
        }
        // ... other items
        item {
            Button(
                modifier = Modifier
                    .fillMaxWidth()
                    .transformedHeight(this, transformationSpec)
                    .minimumVerticalContentPadding(ButtonDefaults.minimumVerticalListContentPadding),
                transformation = SurfaceTransformation(transformationSpec),
                onClick = { /* ... */ },
                icon = {
                    Icon(
                        imageVector = Icons.Default.Build,
                        contentDescription = "build",
                    )
                },
            ) {
                Text(
                    text = "Build",
                    maxLines = 1,
                    overflow = TextOverflow.Ellipsis,
                )
            }
        }
    }
}
List.kt