App stürzt nach drücken der Back-Taste bei super.onCreate() ab

Intent iIntent = new Intent(MainActivity.this, SelectFile.class);
iInten.putExtra("TEST1", "Teststring 1");
startActivityForResult(iIntent, 0);

@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		// ----------//
		// SelectFile//
		// ----------//
		if (requestCode == 0) {
			if (resultCode == RESULT_OK) {
				createAbfrage();
				createStatistik();
			}
		}
	}

private void createAbfrage() {
		int ID = 1;

		FrameLayout frameLayout = new FrameLayout(this);
		frameLayout.setId(ID);
		LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.MATCH_PARENT, 7);

		
		llFragmentContainer.addView(frameLayout, 0, layoutParams);

	
		FragmentManager fm = getSupportFragmentManager();
		FragmentTransaction transaction = fm.beginTransaction();
		Anzeige abfrageObj = new Anzeige();

		transaction.add(ID, abfrageObj, "fragment_one");
		transaction.commit();
		fm.executePendingTransactions();
	}



	private void createStatistik() {
		int ID = 2;

		FrameLayout frameLayout = new FrameLayout(this);
		frameLayout.setId(ID);
		LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.MATCH_PARENT, 3);

		llFragmentContainer.addView(frameLayout, 1, layoutParams);

		

		StatistikInterface statistikObj = new StatistikInterface(true); 

		FragmentManager fm = getSupportFragmentManager();
		FragmentTransaction transaction = fm.beginTransaction();

		transaction.add(ID, statistikObj, "fragment_two");
		transaction.commit();
		fm.executePendingTransactions();
	}

@Override
	protected void onCreate(Bundle savedInstanceState) {
		//TODO HIER ENTSTEHT DER FHELER
		super.onCreate(savedInstanceState);

		setContentView(R.layout.main_activity_multiview);

	
		ActionBar actionBar = getActionBar();
		actionBar.setCustomView(R.layout.actionbar);
		actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_SHOW_HOME);

		TextView tvOeffnen = (TextView) actionBar.getCustomView().findViewById(R.id.tvMenuDateiOeffnen);
		tvOeffnen.setOnClickListener(this);
		tvMenuLektionWahl = (TextView) actionBar.getCustomView().findViewById(R.id.tvMenuLektionWahl);
		tvMenuLektionWahl.setOnClickListener(this);


		if (findViewById(R.id.llFragmentContainer) != null) {
			llFragmentContainer = (LinearLayout) findViewById(R.id.llFragmentContainer); 
		}
	}

03-09 07:03:06.104: D/dalvikvm(7909): newInstance failed: no <init>()

[COLOR="Red"]
public StatistikInterface(){
	super();
}[/COLOR]

public StatistikInterface(boolean statistikUebersichtActiveStatus) {
	this.statistikUebersichtActiveStatus = statistikUebersichtActiveStatus;
}