How to save an in game screenshot directly to gallery?

I have been searching a lot for the answer to the question. First question is that "is that even possible to save the captured screenshot directly to gallery?" Currently I am using "application.captureScreenshot();" to capture the screenshot and it works fine and saves the screenshot to the persistent data path. But what to do when I have to display the captured screenshot in the android gallery? Currently it doesn't display there. Please help, thanks.