197 lines
8.2 KiB
Markdown
197 lines
8.2 KiB
Markdown
[](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub)
|
||
[](https://opensource.org/licenses/Apache-2.0)
|
||
# [Compose Multiplatform](https://github.com/JetBrains/compose-multiplatform) Mobile Application
|
||
|
||
Use this template to start developing your own Compose Multiplatform application targeting Android and iOS (Alpha).
|
||
|
||
## Setting up your development environment
|
||
|
||
Your Compose Multiplatform application targeting Android and iOS is a Kotlin Multiplatform project.
|
||
Let's make sure you have set up your environment for mobile development with Kotlin Multiplatform.
|
||
|
||
> **Warning**
|
||
> Writing and running iOS-specific code for a simulated or real device requires macOS. This is an Apple limitation.
|
||
|
||
To work with this template, you will need:
|
||
- A machine running a recent version of macOS
|
||
- [Xcode](https://developer.apple.com/xcode/)
|
||
- [Android Studio](https://developer.android.com/studio)
|
||
- [Kotlin Multiplatform Mobile plugin](https://plugins.jetbrains.com/plugin/14936-kotlin-multiplatform-mobile)
|
||
- [CocoaPods](https://kotlinlang.org/docs/native-cocoapods.html)
|
||
|
||
### Checking your development environment with `kdoctor`
|
||
|
||
**Before opening the project in Android Studio**, use [`kdoctor`](https://github.com/Kotlin/kdoctor) to ensure your development environment is configured correctly. Install `kdoctor` via [`brew`](https://brew.sh/):
|
||
```
|
||
brew install kdoctor
|
||
```
|
||
|
||
Then, run `kdoctor` from your terminal. If everything is set up correctly, you should see valid output. Otherwise, `kdoctor` will provide you which parts of your setup still need configuration:
|
||
|
||
```
|
||
Environment diagnose (to see all details, use -v option):
|
||
[✓] Operation System
|
||
[✓] Java
|
||
[✓] Android Studio
|
||
[✓] Xcode
|
||
[✓] Cocoapods
|
||
|
||
Conclusion:
|
||
✓ Your system is ready for Kotlin Multiplatform Mobile Development!
|
||
```
|
||
|
||
## Opening the project
|
||
Use Android Studio to open the project. Make sure you have the [Kotlin Multiplatform Mobile plugin](https://plugins.jetbrains.com/plugin/14936-kotlin-multiplatform-mobile) installed.
|
||
|
||
## Examining the project structure
|
||
|
||
Switch to the Project View to see all files and targets belonging to the project.
|
||
|
||
|
||
|
||
Your Compose Multiplatform project includes three modules:
|
||
|
||
### `shared`
|
||
This Kotlin module that contains the logic common for both Android and iOS applications – the code you share between platforms.
|
||
|
||
**This is also where you will write your Compose Multiplatform code**.
|
||
|
||
The shared root `@Composable` function for your app lives in `shared/src/commonMain/kotlin/App.kt`.
|
||
|
||
`shared` uses Gradle as the build system. You can add dependencies and change settings in `shared/build.gradle.kts`. The shared module builds into an Android library and an iOS framework.
|
||
|
||
### `androidApp`
|
||
|
||
This Kotlin module that builds into an Android application. It uses Gradle as the build system. The androidApp module depends on and uses the shared module as a regular Android library.
|
||
|
||
### `iosApp`
|
||
This is the Xcode project that builds into an iOS application. It depends on and uses the shared module as a CocoaPods dependency.
|
||
|
||
## Running your application
|
||
|
||
## Android
|
||
To run your application on an Android emulator:
|
||
|
||
- Create an [Android virtual device](https://developer.android.com/studio/run/managing-avds#createavd).
|
||
- Select the `androidApp` run configuration.
|
||
- Select your target device and press **Run**.
|
||
|
||
|
||
|
||
|
||
|
||
<details>
|
||
<summary>Using Gradle</summary>
|
||
|
||
`./gradlew installDebug` - install Android application on an Android device (on a real device or on an emulator)
|
||
|
||
</details>
|
||
|
||
## iOS
|
||
|
||
We suggest going through the "Hello, World" steps of creating and deploying a sample project in Xcode to a simulator and/or your physical device.
|
||
A video tutorial for setting up Xcode and running your first "Hello, World" application is available in [this Standford CS193P lecture recording](https://youtu.be/bqu6BquVi2M?start=716&end=1399).
|
||
|
||
### Running on an iOS simulator
|
||
|
||
Once you have configured your environment correctly, you will be able to select which iOS simulator to run your application in Android Studio on by modifying the `iosApp` run configuration.
|
||
|
||
Select "Run" | "Edit Configurations..." and navigate to the "iOS Application" | "iosApp" run configuration. In the "Execution target" drop-down, select your target device.
|
||
|
||
|
||
|
||
|
||
|
||
Press the "Run" button to run your Compose Multiplatform app on the iOS simulator.
|
||
|
||
|
||
|
||
### Running on a real iOS device
|
||
|
||
Running your Compose Multiplatform application on a physical device can be done for free. You need:
|
||
- an [Apple ID](https://support.apple.com/en-us/HT204316)
|
||
- the registered iOS device in Xcode
|
||
|
||
Before you continue, make sure that you can successfully run a plain "Hello, World" application from Xcode on your physical device.
|
||
|
||
To run the application, set the `TEAM_ID` associated with your Apple ID in `iosApp/Configuration/Config.xcconfig`.
|
||
|
||
#### Finding your Team ID
|
||
Use `kdoctor --team-ids` to find and set your Team ID. This will list all Team IDs currently configured on your system, for example:
|
||
```
|
||
3ABC246XYZ (Max Sample)
|
||
ZABCW6SXYZ (SampleTech Inc.)
|
||
```
|
||
|
||
<details>
|
||
<summary>Alternative way of finding your Team ID</summary>
|
||
|
||
If you're running into trouble with the method described above, you can try this alternative method.
|
||
- Run the `iosApp` run configuration from Android Studio (it will fail)
|
||
- Open the `iosApp/iosApp.xcworkspace` in Xcode
|
||
- Select `iosApp` in the menu on the left side
|
||
- Navigate to "Signing & Capabilities"
|
||
- Select your Personal Team in the "Team" dropdown. If you haven't set up your team, use the "Add account..." option and follow the steps inside Xcode.
|
||
</details>
|
||
|
||
Set this Team ID in `iosApp/Configuration/Config.xcconfig` in the `TEAM_ID` field.
|
||
|
||
After that you can re-open the project in Android Studio, and it will show the registered iOS device in the `iosApp`
|
||
run configuration.
|
||
|
||
|
||
### Make your first changes
|
||
|
||
The common entry point for your Compose Multiplatform app is located in `shared/src/commonMain/kotlin/App.kt`. Here, you will see the code that is responsible for rendering the "Hello, World" button. If you make changes here, you will see them reflected on both Android and iOS:
|
||
```kotlin
|
||
@Composable
|
||
internal fun App() {
|
||
MaterialTheme {
|
||
var text by remember { mutableStateOf("Hello, World!") }
|
||
|
||
Button(onClick = {
|
||
text = "Hello, ${getPlatformName()}"
|
||
}) {
|
||
Text(text)
|
||
}
|
||
}
|
||
}
|
||
```
|
||
|
||
Update the shared code by adding a text field that will update the name displayed on the button:
|
||
|
||
```kotlin
|
||
@Composable
|
||
internal fun App() {
|
||
MaterialTheme {
|
||
var text by remember { mutableStateOf("Hello, World!") }
|
||
Column {
|
||
Button(onClick = {
|
||
text = "Hello, ${getPlatformName()}"
|
||
}) {
|
||
Text(text)
|
||
}
|
||
TextField(text, onValueChange = { text = it })
|
||
}
|
||
}
|
||
}
|
||
```
|
||
|
||
|
||
|
||
### Configuring the iOS application
|
||
|
||
This template contains a `iosApp/Configuration/Config.xcconfig` configuration file that allows you to configure most basic properties without having to move to Xcode. It contains:
|
||
- `APP_NAME` - target executable and application bundle name
|
||
- `BUNDLE_ID` - [bundle identifier](https://developer.apple.com/documentation/bundleresources/information_property_list/cfbundleidentifier#discussion)
|
||
- `TEAM_ID` - [Team ID](https://developer.apple.com/help/account/manage-your-team/locate-your-team-id/#:~:text=A%20Team%20ID%20is%20a,developer%20in%20App%20Store%20Connect.)
|
||
|
||
Note: To configure the `APP_NAME` setting, open `Config.xcconfig` in any text editor *before opening* the project in Android Studio, and set the desired name.
|
||
|
||
If you need to change this setting after you open the project in Android Studio, please do the following:
|
||
- close the project in Android Studio
|
||
- run `./cleanup.sh` in your terminal
|
||
- change the setting
|
||
- open the project in Android Studio again
|
||
|
||
For configuring advanced settings, you can use Xcode. Open the `iosApp/iosApp.xcworkspace` in Xcode after opening the project in Android Studio, and use Xcode to make your changes.
|