Q: Cannot work with SherlockFragment I have a problem with SherlockFragment. 
If I change "extends SherlockFragment" with "Fragment", works perfectly. 
But when working with Sherlock, I would it work this way.
This code is a fragment:
import com.actionbarsherlock.app.SherlockFragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;


public class Box extends SherlockFragment {

    public Box(){}

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.box, container, false);
        return rootView;
    }
}

In my ActivityMain.java i have this:
SherlockFragment fragment = null;

It works with Fragment fragment = null;
And i call it:
fragment= new Box();

But the problem is the .replace in this code:
 FragmentManager fragmentManager = getFragmentManager();
 fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();


A: change the getFragmentManager to getSupportFragmentManager for using sherlockfragment 
FragmentManager fragmentManager = getSupportFragmentManager();
 fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();

