Why TabActivity is deprecated in android

To fix the issue you can do Yes the usage of TabActivity has been deprecated since android 3.0. From now on fragments are supposed to be used. The android compatibility library is a standalone library in the form of a jar file which can be included in projects. This library makes available the api's for fragments and other new functions introduced in Honeycomb for devices with os version less than 3.0. With the compatibility library fragments can be implmented from android 1.5 upwards.

it helps some times Not sure if you're still looking (hopefully not :) ) but here's a really good one: how to use fragments

it helps some times In the Android docs you find an example of how to use a TabHost with Fragments. No TabActivity needed. Here is the example: http://developer.android.com/resources/samples/Support4Demos/src/com/example/android/supportv4/app/FragmentTabs.html

may help you .
For Android 4.0+ version, what is the best way to implement this?