android - how to use viewmodel by ktx?

Question

I want to use it like the official website val viewModel by viewModels { SavedStateViewModelFactory(application, this) }

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Yes, it's much simpler than using ViewModelProvider...

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We all know that a ViewModel can be encapsulated in a basefragment, so I want to know how to encapsulate it by by viewmodels.

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I tried to encapsulate basefragment, but I had a problem with generics

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just like as follow:
my baseFragment:

abstract class AbsFragment444<DB :ViewDataBinding, VM :ViewModel> :Fragment(){ 

    ***//other var
    ***//other var
    ***//other var

      
    protected  val mViewModel: VM by    viewModels(this,SavedStateViewModelFactory(requireActivity().application,this))
}

However, the compiler prompts: cannot use 'VM' as modified type parameter. Use a class instead

What should I do?

question from:https://stackoverflow.com/questions/65896296/how-to-use-viewmodel-by-ktx

Answer 1

Waitting for answers