How to switch between running application in android

Most of time, when we are on android and we need two or more application running simultaneously. In this situations we usually stuck, how to switch between two apps like Alt+Tab in Windows environment.

So here is a trick, this is not proper solution but work.

Simply hold down "home" key for a little while, you will got a pop-up window, which show all recently or running apps.

So switch to your desired apps easily.