Kotlin Multiplatform Academy · 课时

启用 Compose Multiplatform

添加插件和您的第一个共享可组合函数

启用 Compose Multiplatform 是 CoddyKit 上的免费 Kotlin Multiplatform Academy 课时。这是第 1 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 Kotlin Multiplatform Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Kotlin Multiplatform 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。

One UI, Every Screen

Compose Multiplatform lets you describe your UI once in Kotlin and render it on Android, iOS and desktop. The same screen code runs everywhere. 🎉

Built on Jetpack Compose

If you know Jetpack Compose, you already know most of this. Compose Multiplatform brings that same declarative toolkit to every target you support.

Add the Compose Plugin

You enable it by adding the Compose Gradle plugin alongside the Kotlin Multiplatform plugin in your shared module. That unlocks the composable APIs.

plugins {
    kotlin("multiplatform")
    id("org.jetbrains.compose")
}

Pull In the Compose BOM

The Compose dependencies live behind a single accessor. You add the runtime, foundation and material libraries from the compose extension so versions stay aligned.

kotlin {
    sourceSets {
        commonMain.dependencies {
            implementation(compose.material3)
        }
    }
}

Your First Shared Composable

A composable is just a Kotlin function marked with @Composable. Put it in commonMain and it becomes available to every platform at once.

import androidx.compose.runtime.Composable
import androidx.compose.material3.Text

@Composable
fun Greeting(name: String) {
    Text("Hello, " + name)
}

A Root App Composable

Most projects expose one top-level App composable in shared code. Each platform simply calls into it, so the whole UI tree is shared.

@Composable
fun App() {
    Greeting("KMP")
}

Material Theming Comes Along

Compose Multiplatform ships Material components and theming, so buttons, text fields and colors look consistent across platforms out of the box.

@Composable
fun App() {
    MaterialTheme {
        Greeting("KMP")
    }
}

Android Hosts It Natively

On Android you mount the shared App inside an Activity using setContent, exactly like a normal Compose app. Nothing special is required.

class MainActivity : ComponentActivity() {
    override fun onCreate(b: Bundle?) {
        super.onCreate(b)
        setContent { App() }
    }
}

iOS and Desktop Plug In Too

iOS and desktop each have a tiny entry point that hosts the same App composable. You write the screen once and host it from every target.

Live Previews Still Work

You keep fast iteration with @Preview in your IDE, so you see your shared composable render without launching a full device build each time.

What This Unlocks

With Compose enabled, your UI joins your logic in shared code. The result is one codebase driving pixel-identical screens on phones and desktops.

Quick Check

Where does a shared composable belong?

Recap: Compose Everywhere

You enabled the Compose plugin, wrote a shared composable in commonMain, wrapped it in MaterialTheme and saw how each platform hosts the same App. One UI, every screen. 🚀

常见问题解答

「启用 Compose Multiplatform」课时是免费的吗？

是的 — 「启用 Compose Multiplatform」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 Kotlin Multiplatform Academy 课程的其余内容，请升级到 CoddyKit PRO。 Kotlin Multiplatform Academy 课程共包含 4 节课。

「启用 Compose Multiplatform」这节课中我会学到什么？

添加插件和您的第一个共享可组合函数你通过在浏览器中直接运行的动手代码来练习 Kotlin Multiplatform 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 Kotlin Multiplatform Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Kotlin Multiplatform 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 1 节课，共 4 节。

「启用 Compose Multiplatform」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 Kotlin Multiplatform Academy 课中编写并运行代码吗？

能。每节 Kotlin Multiplatform 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 Kotlin Multiplatform Academy