FragmentManager in android : Ok i Moved the NavigationTabbedActivity from one project to another but, im getting this Error `setSupportActionBar` method cannot be found.Ive tried replacing the the import widget.toolbar with 

`import android.support.v7.widget.Toolbar;`

but it Doesnt solve the problem , and im having problem with
 
`getSupportFragmentManager` this method cannot be found , Actually it needs the class to extend with Activity but in my case the Class already extends an CustomActivity which inturn Extends default AndroidActivity,i tried extending the customActivity with AppCombatActivity but it didnt work either.Is this error because i copied the file ?where am i wrong? 
