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Kotlin-Multiplatform (Android, iOS, JS & JVM Desktop App)

kotlin-version kotlin-weekly

License: GPL v3

This example shows how to create a simple Android/iOS/JVM/JS project sharing some Kotlin code. This app saves on a local database your favourites locations and get the current weather of them from OpenWeatherMap.

In this app we share common code for both platforms (Android/iOS) to get data from an API (in this case OpenWeatherMap). The libraries that we use are:

Tests:

  • MockK: mocking library for Kotlin

Android App - Master Branch

With this app you can get the weather of your locations using KTor:

And add and save on SQLDelight database your favourite locations:

iOS App

Open XCode and select the project:

JVM - Desktop App

To execute this version as desktop app, you have to execute this code on your console:

./gradlew JavaFxApp:run

By default the JDBC SQLite is created in memory. If you want to persist your database in your disk, you have to indicate the path when you create the database driver:

SQLDriver.kt
JdbcSqliteDriver("jdbc:sqlite:$your_database_path")

JS App

If you want to launch a web to get the weather you can try executing the next commands:

./gradlew JsApp:run
./gradlew BackEnd:run
--> localhost:8080

Current weather is not shown when you launch the browser? If you have this problem (Module not found: Error: Can't resolve 'core-js/features/object/assign') try to reinstall the node module core-js:

npm install core-js

I have followed these examples:

https://kotlinlang.org/docs/tutorials/native/mpp-ios-android.html

https://www.raywenderlich.com/1022411-kotlin-multiplatform-project-for-android-and-ios-getting-started

https://proandroiddev.com/kotlin-multiplatform-very-beginners-guide-part-3-database-e34c92daf41c