Filling ListView only 2 times

Faced with a very ambiguous problem. Perhaps the solution lies in some small detail, but I just can not figure it out. There is a Fragment with a ListView. There is a database from where ArrayList<Class> is taken and sent to FragmentA adapter. At the first transition to this fragment A , the ListView is not displayed. If you return to the previous fragmentB and once again go to fragment A , then the ListView is displayed. What could be the problem? I rewrote the adapter several times, but the problem was not solved. Here is the fragment code:

 public class RegionListFrag extends android.support.v4.app.Fragment { ArrayList<String> names = new ArrayList<>(); RegionAddAdapter regionAddAdapter; ListView listView; DBHelper dbHelper; SQLiteDatabase db; final String LOG_TAG = "myLogs"; RegionNameClass regionNameClass; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); ((MainActivity)getActivity()).changeTbOn(); MainActivity.toolbar.setTitle("Регионы"); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.region_layout, container, false); MainActivity.toolbar.setTitle("Регионы"); listView = (ListView) rootView.findViewById(R.id.region_lv); regionAddAdapter = new RegionAddAdapter(getActivity(), setRv()); listView.setAdapter(regionAddAdapter); listView.setPadding(0, 110, 0, 0); return rootView; } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.menu_toolbar, menu); super.onCreateOptionsMenu(menu,inflater); Menu myMenu = menu; MenuItem nextItem = myMenu.findItem(R.id.accept_category); nextItem.setVisible(true); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) { getFragmentManager().popBackStack(); getFragmentManager().beginTransaction().commit(); return true; } if (item.getItemId() == R.id.accept_category) { } return super.onOptionsItemSelected(item); } ArrayList<RegionNameClass> setRv(){ dbHelper = new DBHelper(getActivity()); db = dbHelper.getWritableDatabase(); Cursor c = db.query("regiontable", null, null, null, null, null, null); ArrayList<RegionNameClass> rvArray = new ArrayList<RegionNameClass>(); while(c.moveToNext()){ String name = c.getString(c.getColumnIndex("regNames")); RegionNameClass regionObj = new RegionNameClass(name); rvArray.add(regionObj); } Log.d(LOG_TAG, "кол-во массива - " + rvArray.size()); return rvArray; } } 

Adapter code:

 public class RegionAddAdapter extends ArrayAdapter<RegionNameClass> { private static ArrayList<RegionNameClass> list = new ArrayList<RegionNameClass>(); private final Activity context; public ArrayList<RegionNameClass> selectedStrings = new ArrayList<RegionNameClass>(); final String LOG_TAG = "myLogs"; RegionNameClass regionNameClass; public RegionAddAdapter(Activity context, ArrayList<RegionNameClass> top) { super(context, R.layout.region_row, list); this.context = context; list = top; } static class ViewHolder { protected TextView myTv; } @Override public View getView(int position, View convertView, ViewGroup parent) { View view = null; RegionNameClass myClass = getItem(position); if (convertView == null) { convertView = LayoutInflater.from(getContext()).inflate(R.layout.region_row, parent, false); } TextView tvName = (TextView) convertView.findViewById(R.id.region_tv); tvName.setText(myClass.name); return convertView; } }