Android users who have used their devices for a while might know how hard it has been to take a screenshot on their devices. Earlier versions of Android required a user to root their device before they could take a screen capture of their screen.
iOS users have always found it easier to take screenshots on the iPhone, iPad or iPod Touch. Thankfully, Google has also made it far more easier to take screenshots in Ice Cream Sandwich and Jelly Bean.
If you are looking to take a screenshot on your Android device running Ice Cream Sandwich or Jelly Bean, you can do so by clicking the volume down button and the power button (please hold them down for one second at-least). Once you do that, you will hear a click sound and an animation and the screenshot will be saved in your gallery.
Taking a screenshot on the Nexus 7 and Galaxy Nexus is similar as well.