This is a Kotlin Multiplatform library for storing key-value data in Android and iOS applications. It is designed to provide a consistent interface for storing and retrieving data across both platforms. Under the hood, the library uses Shared Preferences on Android and User Defaults on iOS.

Android API Level >= 21 iOS ios_arm64 and ios_x64 targets

To use the library, you need to add the library to your project dependencies. Here's how you can do it in Gradle:

Add mavenCentral to your repositories in the build.gradle.kts file:

repositories {
    mavenCentral()
    // others
}

Add the library to your project dependencies in the commonMain:

 commonMain {
    dependencies {
        implementation("com.matsawa:userpreferences:0.0.1")
        // others
    }
}

After adding the library, you can use it in your code. Here is an example of how to store and retrieve a String value:

// Store a value
userPreferences.addString("myKey", "myValue")

// Retrieve a value
val value = userPreferences.getString("myKey")

The library also supports other basic data types, such as Boolean, Int, Long, Float, and Double:

// Store a value
userPreferences.addBoolean("myKey", true)

// Retrieve a value
val value = userPreferences.getBoolean("myKey")

You can also retrieve any data type with a default value if the key is not found in storage:

// Retrieve a value with a default if not found
val value = userPreferences.getInt("myKey", defaultValue = value)

You can remove a single element by key:

// Remove a single element by key
userPreferences.remove("myKey")

You can remove all elements:

// Remove all elements
userPreferences.clear()

You can check if an element exists:

// Check if an element exists
val exists = userPreferences.contains("myKey")

For more information on how to use the library, please check our sample.

Contributions to the library are welcome. If you find a bug or have a feature request, please open an issue on the GitHub repository. If you would like to contribute code, please fork the repository and submit a pull request.

The library is released under the MIT License. Please see the LICENSE file for more information.