How to make fragment transaction when clicked on a listitem?

Question

I have an activity where it contains an ActionBar (with four tabs) a fragment respectively assigned to each of these tabs. In these fragments I've assigned some ListAdapters filled with string values, clickable that furthermore I want to operate. When clicking on an item I want that app to send from that fragment to another. I know that I have to use FragmentManager() and FragmentTransaction() but since I'm new to Android dev I demand of any kind of help, help that is appreciated.

Here's the snippet code of one of the tabs(UserFragment.java):

    import android.app.ListFragment;
    import android.content.Intent;
    import android.os.Bundle;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.AdapterView;
    import android.widget.AdapterView.OnItemClickListener;
    import android.widget.ArrayAdapter;
    import android.widget.ListView;


/** This is a listfragment class */
public class UserFragment extends ListFragment 
{

    /** An array of items to display in ArrayList */
    String user_items[] = new String[]
    {
        "Account",
        "Addresses",         
        "Payment Providers",
        "Profile",
        "Transactions",
        "Wallet"
    };

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
    {
        /** Creating array adapter to set data in listview */
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity().getBaseContext(), android.R.layout.simple_expandable_list_item_1, user_items);

        /** Setting the array adapter to the listview */
        setListAdapter(adapter);

        getListView().setOnItemClickListener(new OnItemClickListener()
        {
            public void onItemClick(AdapterView<?> parent, View view, int pos,
                    long id) 
            {
                Intent myIntent = new Intent(getActivity().getBaseContext(), Profile.class);
                startActivity(myIntent);            
            }       
        }); 
        return super.onCreateView(inflater, container, savedInstanceState);     
    }

    @Override
    public void onStart() 
    {
        super.onStart();

        /** Setting the multiselect choice mode for the listview */
        getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
    }
}

The Profile.java activity code:

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
public class Profile extends Activity 
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.profile_layout);

        //Button test = (Button) findViewById(R.id.btnTest);
    }
}

Answer 1

I found what was wrong. After a long search I learnt that if the onCreateView() method is static than it's all good to set listener/s but in this case while we fill an array-adapter of string than it's a no-go since first of first it has to created its View therefore doesn't let the app to make any further listeners. In order to make that available, the onActivityCreated(Bundle) should be initiated/created between onCreateView() and onStart() methods and insert the rest of the code.

Here's the solution to link a ListFragment to another FragmentActivity class:

public void onActivityCreated(Bundle savedInstanceState)
    {    
        super.onActivityCreated(savedInstanceState);

        getListView().setOnItemClickListener(new OnItemClickListener()
        {
            public void onItemClick(AdapterView<?> parent, View view, int pos,
                    long id) 
            {
                Intent myIntent = new Intent(getActivity().getBaseContext(), Profile.class);
                startActivity(myIntent);            
            }       
        });
    }