ViewPager and PagerTabStrip

AppViewPager.java

package ch.pboos.android.sample.viewpager;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class MainActivity extends FragmentActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_activity);
        ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
        viewPager.setAdapter(new SampleFragmentPagerAdapter());
    }

    public class SampleFragmentPagerAdapter extends FragmentPagerAdapter {
        private static final String[] TITLES = new String[] { 
          "Page 1", 
          "Page 2", 
          "Page 3" 
        };

        public static final int NUM_TITLES = TITLES.length;

        public SampleFragmentPagerAdapter() {
            super(getSupportFragmentManager());
        }

        @Override
        public int getCount() {
            return NUM_TITLES;
        }
        
        @Override
        public CharSequence getPageTitle(int position) {
            return TITLES[position];
        }

        @Override
        public Fragment getItem(int position) {
            return PageFragment.create(position + 1);
        }
    }

    public static class PageFragment extends Fragment {
        public static final String ARG_PAGE = "ARG_PAGE";

        private int mPage;

        public static PageFragment create(int page) {
            Bundle args = new Bundle();
            args.putInt(ARG_PAGE, page);
            PageFragment fragment = new PageFragment();
            fragment.setArguments(args);
            return fragment;
        }

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            mPage = getArguments().getInt(ARG_PAGE);
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View view = inflater.inflate(R.layout.fragment_page, container, false);
            TextView textView = (TextView) view;
            textView.setText("Fragment #" + mPage);
            return view;
        }
    }
}

fragment_page.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center" />

main_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <android.support.v4.view.PagerTabStrip
        android:id="@+id/pager_header"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="top"
        android:background="#000"
        android:paddingBottom="4dp"
        android:paddingTop="4dp"
        android:textColor="#fff" />

</android.support.v4.view.ViewPager>