Simple tips to take screen capture of android phone.
1. On your Android 4.0 / ICS phone, go to the screen you want to capture.
2. Then press and hold the Volume Down and Power buttons for 2-3 seconds.
3. This will capture the screen and save it into your Gallery > Screenshots. On your phone’s memory card or memory, it will save these photos into the Pictures/Screenshots folder.
As simple as 1, 2, 3
This is the sample taken with built-in features of Android 4.0 and above.