AndroidViewModel has no zero argument constructor

if you're using hilt, you probably forgot to annotate your activity with @AndroidEntryPoint

apparently if I change

recipeViewModel = new ViewModelProvider(this).get(RecipeViewModel.class);

to this

recipeViewModel = new ViewModelProvider(this, ViewModelProvider.AndroidViewModelFactory.getInstance(this.getApplication())).get(RecipeViewModel.class);

It works. I don't know why this solution works could someone explain?