In this example you can see how to implement the Up Navigation, i.e. the option to go back to a previous activity using the button in the upper left of the action bar.
The previous activity can be a fixed activity or an activity determined at runtime.
In the post Tab Layout in Android with ActionBar and Fragment the fragments can’t be replaced later, in this post I write the changes in order to replace the first fragment of the first tab with a third fragment using a button at runtime.
In the post Tab Layout in Android with ActionBar and Fragment as dnoray wrote in his comment, there is a problem: when you rotate the screen (ctrl + F11 in the emulator) there is an overlap of the two fragments as seen in the figure.
For a further discussion on this topic you can read this.
The idea for this post came to me after reading the comment of Esthon Wood: “do you have any idea on how to save the state of the WebView? I mean, the webview refreshes everytime I tap on the tab.” in the post Tab Layout in Android with ActionBar and Fragment.
In the post Tab Layout in Android with ActionBar and Fragment I wrote an example about tabs in an action bar where each label open a fragment that you can not change at runtime.
In this post I explain how to replace a fragment with an other using a button.
In a previous post I wrote an example of Layout Tab using a TabActivity class that it is deprecated since version 3.0 Honeycomb of Android.
In this post I develop the same interface using ActionBar and Fragment, and I tried wherever possible to limit the changes to the files *.xml.