protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
SetContentView(Resource.Layout.activity_main);
toolbar = FindViewById <Android.Support.V7.Widget.Toolbar>(Resource.Id.toolbar);
SetSupportActionBar(toolbar);
FloatingActionButton fab = FindViewById <FloatingActionButton>(Resource.Id.fab);
fab.Click += FabOnClick;
//DrawerLayout drawer = FindViewById<DrawerLayout>(Resource.Id.drawer_layout);
//ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, Resource.String.navigation_drawer_open, Resource.String.navigation_drawer_close);
//drawer.AddDrawerListener(toggle);
//toggle.SyncState();
NavigationView navigationView = FindViewById <NavigationView>(Resource.Id.nav_view);
navigationView.SetNavigationItemSelectedListener(this);
worksList = SQLiteDb.GetWorks();
mainListView = FindViewById <ListView>(Resource.Id.mainListView);
mainListView.SetSelection(0);
mainListView.ItemClick += MainListView_ItemClick;
mainListView.ItemLongClick += MainListView_ItemLongClick;
UpdateAdapter();
SQLiteDb.StartApp(this); // starting load words to library
}