Millises etapis või juhtudel on soovitatav luua Singleton mustri objekt rakenduses?

It is recommended to create a Singleton pattern in cases where it is necessary to guarantee a single instance of a class throughout the application's lifecycle. In Android, this is often used for resource managers, settings, databases, or services that need to be globally accessible.

Creating a Singleton:

• During application initialization, if the object is needed immediately (e.g., in the Application class).
• Lazily, upon the first access to the object, if its creation is resource-intensive and not always necessary.

In Kotlin, a singleton is usually created using an object (object), which is instantiated lazily and is thread-safe:

object MySingleton {
    fun doSomething() {
        // logic
    }
}

This way, the Singleton is created upon first access, which is optimal in terms of performance and resource management.