Fixed category filter

app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/MainActivity.kt

@@ -332,6 +332,7 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
         adapter.addFragment(CategoriesFragment(), getString(R.string.categories_title))
 
         viewpager.adapter = adapter
+        viewpager.offscreenPageLimit = 3
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {

app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/CategoriesFragment.kt

@@ -35,7 +35,7 @@ class CategoriesFragment : Fragment() {
     }
 
     private fun prepareDatabaseConnection() {
-        val dbHelper = DBStorageController(requireContext(), sharedPreferences.getString("currentGroup", "database")!!)
+        val dbHelper = DBStorageController(requireContext(), sharedPreferences.getString("currentGroup", "offline")!!)
         categoryDAO = CategoryDAO(dbHelper)
     }