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从 Android 应用调用共享代码

将共享函数接入 Jetpack 界面

从 Android 应用调用共享代码 是 CoddyKit 上的免费 Kotlin Multiplatform 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 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。

Android Sees Shared Code

The Android app already depends on your shared module, so the greet function is just another Kotlin call from Android's point of view.

No Special Import

Because it is all Kotlin on the JVM, you simply import the shared package like any local class. There is no bridge or wrapper needed.

import com.example.shared.greet

Call It Directly

From an Activity or composable you call greet like a normal function. The shared logic runs right inside the Android process.

val message = greet("Android")

Show It On Screen

Feed the returned String into a Text composable. The user sees a greeting that was computed by your shared code.

Text(text = greet("Android"))

Inside a Composable

Keep the call simple. The composable only displays the result; the wording itself lives safely in commonMain.

@Composable
fun Hello() {
    Text(greet("Android"))
}

Gradle Wires It Up

The Android module lists the shared module under implementation in its build file. That dependency is what makes the import resolve.

implementation(project(":shared"))

Same JVM, Same Types

Android runs on the JVM, just like the shared module's android target. Strings and numbers map across with zero conversion.

Pass Real Data

You can pass any String, like a user's name from state. The shared function stays the same no matter who calls it.

val msg = greet(userName)

Build and Run

Hit Run in Android Studio and pick an emulator. Your greeting appears, proving the shared module is fully connected. 🚀

If the Import Fails

An unresolved import usually means a sync is missing. Click sync in Gradle so Android Studio re-reads the dependency.

Logic Stays Shared

Notice you wrote zero greeting logic here. Android is just a consumer, which is exactly the role KMP wants the UI layer to play.

Quick Check

How does Android reach the shared function?

Recap

You wired the shared module into Android with a dependency, imported greet, and showed its result in Compose. No bridge required. 🎉

常见问题解答

「从 Android 应用调用共享代码」课时是免费的吗？

是的 — 「从 Android 应用调用共享代码」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。

「从 Android 应用调用共享代码」这节课中我会学到什么？

将共享函数接入 Jetpack 界面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 2 节课，共 4 节。

「从 Android 应用调用共享代码」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。

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