How to get current on screen activity? [duplicate]

Possible Duplicate:

Android: How can I get the current foreground activity (from a service)?

In a method I have to know which activity is on the screen. How do I get the current activity?

Sometimes Fragments need to know which Activity they belong to. For this, use Fragment.getActivity(). This works since API 11.Refer this

How do I get the current activity

You don't. There may not be a "current activity".