Jetpack Compose Academy · 课时

Row：并排放置元素

将子元素从左到右排列。

Row：并排放置元素 是 CoddyKit 上的免费 Jetpack Compose Academy 课时。这是第 2 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 Jetpack Compose Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Jetpack Compose Academy 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Side by Side

When you want children in a horizontal line, you use a Row. It is the sideways sibling of Column. ➡️

Your First Row

A Row takes a trailing lambda just like Column. Each child you call inside lands next to the previous one, left to right.

Row {
    Text("Left")
    Text("Right")
}

Order Is Left to Right

Children flow in source order across the screen. The first Composable sits at the start, the next beside it, and so on.

A Classic Icon Plus Label

Rows shine for small pairs, like an Icon next to a Text label. That side-by-side combo is everywhere in real apps.

Row {
    Icon(Icons.Default.Star, null)
    Text("Favorite")
}

Spacing Between Children

Use horizontalArrangement with spacedBy to drop an even gap between each child instead of padding them one by one.

Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
    Text("A")
    Text("B")
}

Aligning Children Vertically

Set verticalAlignment to line children up across the row's height. CenterVertically keeps an icon and tall text neatly centered.

Row(verticalAlignment = Alignment.CenterVertically) {
    Icon(Icons.Default.Star, null)
    Text("Centered")
}

Pushing Items Apart

Arrangement.SpaceBetween pins the first child to the start and the last to the end, spreading any extra space between them.

Row(horizontalArrangement = Arrangement.SpaceBetween) {
    Text("Start")
    Text("End")
}

Sharing Space with Weight

Give a child weight in its modifier to make it claim the leftover width. Two equal weights split the row evenly.

Row {
    Text("Half", Modifier.weight(1f))
    Text("Half", Modifier.weight(1f))
}

Rows Don't Scroll Yet

A plain Row does not scroll. Children that overflow the width get clipped, so keep a basic Row to content that fits.

Adding Horizontal Scroll

For wide content, attach horizontalScroll to the Row's modifier and the whole strip becomes swipeable sideways.

Row(modifier = Modifier.horizontalScroll(rememberScrollState())) {
    Text("Wide content")
}

Rows Inside Columns

Most screens combine both. A Column stacks sections vertically while each section uses a Row to lay its pieces side by side.

Quick Check

Let's confirm how a Row lays out its children.

Recap: Row

You learned Row: it places children left to right, uses arrangement and alignment to position them, and shares width with weight for flexible layouts.

常见问题解答

「Row：并排放置元素」课时是免费的吗？

是的 — 「Row：并排放置元素」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Jetpack Compose Academy 课程的其余内容，请升级到 CoddyKit PRO。 Jetpack Compose Academy 课程共包含 4 节课。

「Row：并排放置元素」这节课中我会学到什么？

将子元素从左到右排列。你通过在浏览器中直接运行的动手代码来练习 Jetpack Compose Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Jetpack Compose Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Jetpack Compose Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 2 节课，共 4 节。

「Row：并排放置元素」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Jetpack Compose Academy 课中编写并运行代码吗？

能。每节 Jetpack Compose Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

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