how to use singleton class in android (java/kotlin) | Singleton Class in Android How To Use It?

Singleton Class in Android How To Use It?
how to use singleton class in android (java/kotlin)

What is an example of a singleton?
Example of singleton classes is Runtime class, Action Servlet, Service Locator. Private constructors and factory methods are also an example of the singleton class.

Why singleton is not good?
By using singletons in your project, you start to create technical debt. Singletons tend to spread like a virus because it's so easy to access them. It's difficult to keep track of where they're used and getting rid of a singleton can be a refactoring nightmare in large or complex projects.

Why singleton is used?
A singleton should be used when managing access to a resource shared by the entire application. It would be destructive to potentially have multiple instances of the same class. Making sure that access to shared resources is thread-safe is one very good example of where this kind of pattern can be vital.

What is singleton class where is it used?
It is used where only a single instance of a class is required to control the action throughout the execution. A singleton class shouldn't have multiple instances in any case and at any cost. Singleton classes are used for logging, driver objects, caching and thread pool, database connections

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