Jetpack Compose Academy · 课时

weight 与弹性尺寸

在行和列中按比例分配空间。

weight 与弹性尺寸 是 CoddyKit 上的免费 Jetpack Compose Academy 课时。这是第 4 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。

Flexible Space

Sometimes you want children to share space, not take fixed sizes. The weight modifier divides leftover room proportionally. ⚖️

Where weight Lives

weight works only inside a Row or Column. It is part of the layout scope those containers provide to their children.

Equal Split

Give two children the same weight and they share the space evenly, each taking half of what is available.

Box(Modifier.weight(1f))
Box(Modifier.weight(1f))

Uneven Split

Weights are ratios. A child with weight(2f) gets twice the space of a sibling with weight(1f).

Box(Modifier.weight(2f))
Box(Modifier.weight(1f))

Fixed Plus Flexible

Mix and match: give one child a fixed size and let another use weight to absorb whatever space remains.

Box(Modifier.width(80.dp))
Box(Modifier.weight(1f))

Push to the Edge

A single weight on a spacer acts like a push, sending the next child all the way to the far end of the row.

Text("Left")
Spacer(Modifier.weight(1f))
Text("Right")

Weights Run First

Compose measures fixed children first, then splits the leftover space among weighted ones. That is why weight needs siblings to push against.

The fill Flag

By default a weighted child fills its share. Pass fill = false to let it stay smaller than the space it was given.

Modifier.weight(1f, fill = false)

Weighted Columns

The same idea works vertically. In a Column, weight divides the leftover height instead of width.

Column {
  Box(Modifier.weight(1f))
  Box(Modifier.weight(1f))
}

Responsive by Design

Because weights are ratios, your layout scales gracefully across phone and tablet widths without hardcoded numbers.

A Common Pattern

Label on the left, value filling the rest: a weighted row is the classic recipe for clean settings and list rows.

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

Quick Check

Two children sit in a Row with weight(3f) and weight(1f). How is the space shared?

Recap

You can now share space flexibly. weight splits leftover room by ratio inside Rows and Columns for responsive layouts. 🎯

常见问题解答

「weight 与弹性尺寸」课时是免费的吗？

是的 — 「weight 与弹性尺寸」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。

「weight 与弹性尺寸」这节课中我会学到什么？

在行和列中按比例分配空间。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 4 节课，共 4 节。

「weight 与弹性尺寸」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。

此课程中的所有课时

← 返回 Jetpack Compose Academy