Jetpack Compose Academy · 课时

使用 Icon 显示 Material 图标

在任意位置使用内置图标集。

使用 Icon 显示 Material 图标 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。

Meet the Icon Composable

For small symbols like a heart or a back arrow, Compose gives you Icon. It is lighter than Image and tints itself to your theme.

A Library of Icons

You get hundreds of ready-made symbols from Icons, the Material icon set. No drawing, no exporting, just reference one by name.

Icon(imageVector = Icons.Default.Favorite, contentDescription = "Like")

imageVector Is the Symbol

Icon takes an imageVector, a vector graphic from the Material set. Because it is a vector, it stays crisp at any size.

Five Visual Styles

Each symbol comes in styles: Default, Outlined, Rounded, Sharp, and TwoTone. Pick the one that matches your app personality.

Icon(Icons.Outlined.Settings, contentDescription = "Settings")

Extended Icon Pack

The base set is small to keep apps lean. Add the material-icons-extended dependency to unlock thousands more symbols.

Icons Tint Automatically

By default an Icon paints itself with the current content color from your theme, so it always looks consistent without you setting a color.

Override the Tint

Want a custom color? Pass a tint argument and the symbol repaints in exactly that shade.

Icon(Icons.Default.Star, contentDescription = null, tint = Color.Yellow)

Sizing an Icon

Icons render at 24dp by default, the Material standard. Change it with a Modifier.size just like any other composable.

Icon(Icons.Default.Home, contentDescription = null, modifier = Modifier.size(32.dp))

Describe It Too

Like Image, Icon needs a contentDescription. Describe its action, such as "Add to favorites", or pass null if a nearby label already explains it.

Icons Inside Buttons

Icons shine inside other composables. Dropping an Icon into an IconButton gives you a tappable, perfectly sized action.

IconButton(onClick = {}) { Icon(Icons.Default.Delete, "Delete") }

Icon from a Drawable

You can also build an Icon from your own asset using painterResource instead of imageVector, keeping the same automatic tinting.

Quick Check

What is the default color an Icon uses when you do not set a tint?

Recap: Material Icons

You now use Icon for crisp vector symbols, choose a style, override the tint, and size with a modifier. Next: scaling images! 🎯

常见问题解答

「使用 Icon 显示 Material 图标」课时是免费的吗？

是的 — 「使用 Icon 显示 Material 图标」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。

「使用 Icon 显示 Material 图标」这节课中我会学到什么？

在任意位置使用内置图标集。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。

「使用 Icon 显示 Material 图标」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