 <p>First, don't use action bar tabs because they are deprecated (find an alternative <a href="http://stackoverflow.com/questions/24473213/action-bar-navigation-modes-are-deprecated-in-android-l">Action bar navigation modes are deprecated in Android L</a>).</p> <p>Second, optimize fragments that are contained in ViewPager.</p> <p>Third, optimize everything else (like navigation drawer listview)</p>