Incompatible types of fragment

Hi I have small app in android where Im using fragments with navigation drawer for menu. But now I want show in my fragments dialog popup window when user click on something and there I get these errors: MainActivity: ``` private void displayView(int position) { // update the main content by replacing fragments Fragment fragment = null; switch (position) { case 0: fragment = new HomeFragment(); break; case 1: fragment = new FindPeopleFragment(); break; default: break; } if (fragment != null) { FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction() .replace(R.id.frame_container, fragment).commit(); // update selected item and title, then close the drawer mDrawerList.setItemChecked(position, true); mDrawerList.setSelection(position); setTitle(navMenuTitles[position]); mDrawerLayout.closeDrawer(mDrawerList); } else { // error in creating fragment Log.e("MainActivity", "Error in creating fragment"); } } ``` First error I get on fragment = new HomeFragment(); >>incompatible types. Second error on HomeFragment at onCreateView method >> method does not override or implement a method from a supertype HomeFragment: ``` public class HomeFragment extends FragmentActivity { public HomeFragment(){} @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_home, container, false); final RelativeLayout rlPolievkaShowDialog=(RelativeLayout)rootView.findViewById(R.id.rlPolievkaButton); rlPolievkaShowDialog.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { } }); return rootView; } private void showDialog() { DialogFragment newFragment = DialogFragmentAlergeny.newInstance(); newFragment.show(getSupportFragmentManager(), "dialog"); } ``` } DialogFragmentAlergeny: ``` public class DialogFragmentAlergeny extends DialogFragment { public static DialogFragmentAlergeny newInstance() { DialogFragmentAlergeny frag = new DialogFragmentAlergeny(); return frag; } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(getActivity()); View view = getActivity().getLayoutInflater().inflate(R.layout.alergeny_dialog, null); alertDialogBuilder.setView(view); alertDialogBuilder.setTitle(getString(R.string.alergeny_dialog_title)); alertDialogBuilder.setPositiveButton("OK", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); return alertDialogBuilder.create(); } ``` }