Android Compose 控件学习四（MediumTopAppBar）

原创已于 2025-04-29 13:36:35 修改 · 165 阅读

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于 2025-04-29 13:29:49 首次发布

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1.添加库

    implementation("androidx.navigation:navigation-common:2.8.9")
    implementation("androidx.navigation:navigation-compose:2.8.9")
    implementation("androidx.compose.material3:material3:1.3.2")
    implementation("androidx.compose.material3.adaptive:adaptive:1.1.0")
    implementation("androidx.compose.material3.adaptive:adaptive-layout-android:1.1.0")
    implementation("androidx.compose.material3.adaptive:adaptive-navigation-android:1.1.0")
    implementation("androidx.compose.material3.adaptive:adaptive-navigation:1.1.0")
    implementation("androidx.compose.material3:material3-adaptive-navigation-suite:1.3.2")
    implementation("androidx.compose.material:material:1.8.0")
    implementation("androidx.compose.material:material-icons-extended:1.7.8")
    implementation("androidx.compose.material:material-icons-core:1.7.8")
    implementation("androidx.compose.material3:material3-window-size-class:1.3.2")

2.示例

val scrollBehavior = TopAppBarDefaults.enterAlwaysScrollBehavior(rememberTopAppBarState())

    Scaffold(
        modifier = Modifier.nestedScroll(scrollBehavior.nestedScrollConnection),
        topBar = {
            MediumTopAppBar(
                colors = TopAppBarDefaults.topAppBarColors(
                    containerColor = MaterialTheme.colorScheme.primaryContainer,
                    titleContentColor = MaterialTheme.colorScheme.primary,
                ),
                title = {
                    Text(
                        "Medium Top App Bar",
                        maxLines = 1,
                        overflow = TextOverflow.Ellipsis
                    )
                },
                navigationIcon = {
                    IconButton(onClick = { /* do something */ }) {
                        Icon(
                            imageVector = Icons.AutoMirrored.Filled.ArrowBack,
                            contentDescription = "Localized description"
                        )
                    }
                },
                actions = {
                    IconButton(onClick = { /* do something */ }) {
                        Icon(
                            imageVector = Icons.Filled.Menu,
                            contentDescription = "Localized description"
                        )
                    }
                },
                scrollBehavior = scrollBehavior
            )
        },
    ) { innerPadding ->
        innerPadding
        //ScrollContent(innerPadding)
    }