onCreateMenu For Search

MainActivity.kt

 val search = menu.findItem(R.id.searchItems)
        searchView = search.actionView as androidx.appcompat.widget.SearchView
        searchView.isSubmitButtonEnabled = true
        searchView.setOnQueryTextListener(object: androidx.appcompat.widget.
                                          SearchView.OnQueryTextListener{
            override fun onQueryTextSubmit(query: String?): Boolean {
                if (query != null) {
                    getItemsFromDb(query)
                }
                return true
            }

            override fun onQueryTextChange(newText: String?): Boolean {
                if (newText != null) {
                    getItemsFromDb(newText)
                }
                return true
            }

        })