To take a screenshot with an Android smartphone, there is no need to install any application. With a simple keystroke you can record what you see on the screen as an image.
Step 1: Press the Home button at the bottom of the screen and hold.
Step 2: Then press the Power/Sleep button on the right or top of the screen and release both buttons.
Step 3: Your screenshot is automatically saved in the folder/sdcard/ScreenCapture.