Android Compose Accompaniist Pager 中的 TabRowTab 重组问题

我试图在Jetpack Compose中创建一个示例选项卡视图，因此其 struct 将类似于 在父TabRow中，我们迭代选项卡标题并创建可组合的选项卡.

更精确的代码将如下所示.

@OptIn(ExperimentalPagerApi::class)
@Composable
private fun MainApp() {
    Scaffold(
        topBar = {
            TopAppBar(
                title = { Text(stringResource(R.string.app_name)) },
                backgroundColor = MaterialTheme.colors.surface
            )
        },
        modifier = Modifier.fillMaxSize()
    ) { padding ->
        Column(Modifier.fillMaxSize().padding(padding)) {
            val pagerState = rememberPagerState()
            val coroutineScope = rememberCoroutineScope()
            val tabContents = listOf(
                "Home" to Icons.Filled.Home,
                "Search" to Icons.Filled.Search,
                "Settings" to Icons.Filled.Settings
            )
            HorizontalPager(
                count = tabContents.size,
                state = pagerState,
                contentPadding = PaddingValues(horizontal = 32.dp),
                modifier = Modifier
                    .weight(1f)
                    .fillMaxWidth()
            ) { page ->
                PagerSampleItem(
                    page = page
                )
            }

            TabRow(
                selectedTabIndex = pagerState.currentPage,
                backgroundColor = MaterialTheme.colors.surface,
                contentColor = MaterialTheme.colors.onSurface,
                indicator = { tabPositions ->
                    TabRowDefaults.Indicator(
                        Modifier
                            .pagerTabIndicatorOffset(pagerState, tabPositions)
                            .height(4.dp)
                            .background(
                                color = Color.Green,
                                shape = RectangleShape
                            )
                    )
                }
            ) {
                tabContents.forEachIndexed { index, pair: Pair<String, ImageVector> ->
                    Tab(
                        selected = pagerState.currentPage == index,
                        selectedContentColor = Color.Green,
                        unselectedContentColor = Color.Gray,
                        onClick = {
                            coroutineScope.launch {
                                pagerState.animateScrollToPage(index)
                            }
                        },
                        text = { Text(text = pair.first) },
                        icon = { Icon(imageVector = pair.second, contentDescription = null) }
                    )
                }
            }
        }
    }
}

@Composable
internal fun PagerSampleItem(
    page: Int
) {
    // Displays the page index
    Text(
        text = page.toString(),
        modifier = Modifier
            .padding(16.dp)
            .background(MaterialTheme.colors.surface, RoundedCornerShape(4.dp))
            .sizeIn(minWidth = 40.dp, minHeight = 40.dp)
            .padding(8.dp)
            .wrapContentSize(Alignment.Center)
    )
}

我的问题是，每当我们点击选项卡项时，内部内容都会奇怪地重新组合.我不能理解为什么会发生这种事.

Am attaching an image of the recomposition counts below, please take a look that too, it would be good if you guys can help me more for understand this, also for future developers.个

在这个阶段有两个问题需要解决

1. Whether it will create any performance issue, when the view getting more complex个
2. How to resolve this recompostion issue个

非常感谢.