How can I use the singleton pattern in an Android project?

Question

I know about singleton, but I can't use it in an Android project. I am a beginner in Android.

How and where can we use singleton in an Android project for large data? I have used it for simple values.

Answer 1

Singleton in Android is the same as singleton in Java:

A basic singleton class example:

public class AppManager
{
    private static AppManager    _instance;

    private AppManager()
    {

    }

    public synchronized static AppManager getInstance()
    {
        if (_instance == null)
        {
            _instance = new AppManager();
        }
        return _instance;
    }
}