Scrollable Tabs + Swipe, einzelne Activities

protected void onListItemClick(ListView l, View v, int position, long id)	{		super.onListItemClick(l, v, position, id);		String classname = classes[position];											/*wir laden das Objekt das an der Stelle "position" angeklickt											  wird, von unserem "classes"Array in classname.											  in "classes" stehen die namen der Activities die geladen werden											  können. */		try 		{			Class ourClass = Class.forName("com.thenewboston.android.bucky." +classname);											/*hier wird der pfad angegeben in dem die Activities liegen											  + den Activity namen */			Intent ourIntent = new Intent(Menu.this, ourClass);			startActivity(ourIntent);		}		catch (ClassNotFoundException e) 		{			e.printStackTrace();		}

package com.example.carmanager;import java.util.Locale;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentActivity;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentPagerAdapter;import android.support.v4.view.ViewPager;import android.view.LayoutInflater;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.Button;import android.widget.TextView;public class MainActivity extends FragmentActivity {	/**	 * The {@link android.support.v4.view.PagerAdapter} that will provide	 * fragments for each of the sections. We use a	 * {@link android.support.v4.app.FragmentPagerAdapter} derivative, which	 * will keep every loaded fragment in memory. If this becomes too memory	 * intensive, it may be best to switch to a	 * {@link android.support.v4.app.FragmentStatePagerAdapter}.	 */	SectionsPagerAdapter mSectionsPagerAdapter;	/**	 * The {@link ViewPager} that will host the section contents.	 */	ViewPager mViewPager;		Button btnFuel, btnKost, btnStat, btnCal;		@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		// Create the adapter that will return a fragment for each of the three		// primary sections of the app.		mSectionsPagerAdapter = new SectionsPagerAdapter(				getSupportFragmentManager());		// Set up the ViewPager with the sections adapter.		mViewPager = (ViewPager) findViewById(R.id.pager);		/*mViewPager.setOnPageChangeListener(					//sascha	        	new ViewPager.SimpleOnPageChangeListener() {	            	@Override	            	public void onPageSelected(int position) {	                	// When swiping between pages, select the	                	// corresponding tab.	                	getActionBar().setSelectedNavigationItem(position);	            	}	        	});  		*/		mViewPager.setAdapter(mSectionsPagerAdapter);				/*		btnFuel = (Button)findViewById(R.id.buttonFuel);		//sascha		btnKost = (Button)findViewById(R.id.buttonKost);		btnStat = (Button)findViewById(R.id.buttonStat);		btnCal = (Button)findViewById(R.id.buttonCal);		*/					}	@Override	public boolean onCreateOptionsMenu(Menu menu) {		// Inflate the menu; this adds items to the action bar if it is present.		getMenuInflater().inflate(R.menu.main, menu);		return true;	}	/**	 * A {@link FragmentPagerAdapter} that returns a fragment corresponding to	 * one of the sections/tabs/pages.	 */	public class SectionsPagerAdapter extends FragmentPagerAdapter {		public SectionsPagerAdapter(FragmentManager fm) {			super(fm);		}		@Override		public Fragment getItem(int position) {			// getItem is called to instantiate the fragment for the given page.			// Return a DummySectionFragment (defined as a static inner class			// below) with the page number as its lone argument.			Fragment fragment = new DummySectionFragment();			Bundle args = new Bundle();			args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);			fragment.setArguments(args);			return fragment;		}		@Override		public int getCount() {			//Seiten des Strip			// Show 4 total pages.			return 4;		}		@Override		public CharSequence getPageTitle(int position) {			Locale l = Locale.getDefault();			switch (position) {			case 0:				return getString(R.string.title_section1).toUpperCase(l);			case 1:				return getString(R.string.title_section2).toUpperCase(l);			case 2:				return getString(R.string.title_section3).toUpperCase(l);			case 3:				return getString(R.string.title_section4).toUpperCase(l);			}			return null;		}	}	/**	 * A dummy fragment representing a section of the app, but that simply	 * displays dummy text.	 */	public static class DummySectionFragment extends Fragment {		/**		 * The fragment argument representing the section number for this		 * fragment.		 */		public static final String ARG_SECTION_NUMBER = "section_number";		public DummySectionFragment() {		}		@Override		public View onCreateView(LayoutInflater inflater, ViewGroup container,				Bundle savedInstanceState) {			View rootView = inflater.inflate(R.layout.fragment_main_dummy,					container, false);			TextView dummyTextView = (TextView) rootView					.findViewById(R.id.buttonFuel);			//dummyTextView.setText(Integer.toString(getArguments().getInt(			//		ARG_SECTION_NUMBER)));			dummyTextView.setText("eigener String");						return rootView;		}	}}

public static class MainFragment1 extends Fragment