What is the best way to implement action bar like twitter sample UI Pattern.
Twitter for Android: A closer look at Android’s evolving UI patterns Pattern 4: Action Bar http://android-developers.blogspot.com/2010/05/twitter-for-android-closer-look-at.html
Yet another action bar implementation can be found here (shameless plug), https://github.com/johannilsson/android-actionbar. It's implemented as a library project so there's no need to copy-paste resources.
Implementation wise it's built as a widget that extends a RelativeLayout with it own layout for the actions and the bar. This makes it possible to add it to layouts with it own xml snippet.
And then later on refer to it in a activity to add actions.