How is animation accomplished in these apps?
<p>Most of the Android users use the <a href="http://www.talkandroid.com/23387-go-sms-for-android-is-a-clean-alternative-sms-app/" rel="nofollow">GO SMS</a> app, and the iPhone users use their normal messaging app (Android rocks). Now, whenever a user types a message and presses the send button, the message's edit text field sets a glossy green background, also the green colored background comes floating at the back of the edit text field. How do they do it?</p>

<p>(I have been searching this for a while, but was unable to find an answer.)</p>
