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DiceRoller

README.md

DiceRoller

DiceRoller is a sample app using the Kotlin Multiplatform DataStore library to store and observe preferences.

Android & iOS apps with shared data layer

How it works

The app can roll a given number of dice with the given number of sides and display the results. You can also choose to roll numbers until each die produces a unique value.

You can change the settings for the rolls on the bottom half of the screen. Saving the settings writes them to DataStore, which the top of the screen then observes, using the new settings for subsequent rolls.

The shared module is the data layer implementation which includes the code accessing Preferences DataStore as well as the dice rolling logic. The androidApp and iosApp modules both depend on the shared module, and they contain an Android app with Jetpack Compose UI and an iOS app with SwiftUI, respectively.

Running the app

Android

  1. Open the DiceRoller Gradle project in Android Studio
  2. Run the app in the androidApp module

iOS

The iOS application can only be built and run on macOS. You also need to have CocoaPods installed, which can generally be done by running brew install cocoapods or sudo gem install cocoapods.

See CocoaPods Overview and Setup and Check your environment for more details.

From Android Studio
  1. Install the Kotlin Multiplatform Mobile plugin
  2. Open the DiceRoller Gradle project in Android Studio
  3. Choose the iosApp run configuration and run it
From Xcode
  1. Run ./gradlew shared:podInstall in the DiceRoller folder to initialize the project
    • You can skip this step if you've already opened the project in Android Studio and performed a Gradle sync
  2. Open iosApp.xcworkspace (and NOT iosApp.xcodeproj!) in Xcode and start the active scheme

License

Copyright 2022 The Android Open Source Project

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.