How to Take a Screenshot on Android: Taking Screenshot of your Android phone is differ from device to device and little confusing too. Some of them are tricks and other are apps.
Here is list of shortcuts and apps to take screenshots on your Android device easily.
For ICS 4.0 and Above:
If your phone running on Ice Cream Sandwich or above it is very easy to take a screenshot of your phone. Just press the volume down and power button at the same time and hold them for a second and your phone will take a screenshot. It will automatically saved to Gallery.
For Android 2.3 and Below:
Android 2.3 and below doesn’t have screenshotting built-in. Some devices like Samsung do have these features. For example press the Home and Power buttons at the same time to take a shot.
You can take a screenshot on any Android device using Google’s Android SDK. After you’ve set up the Android SDK, all you have to do is connect your Android phone or tablet to your computer with its USB cable and use the SDK.