Cannot create instance of class ViewModel while using MVVM

Question

I have created ViewModel class, and trying to create an instance of my ViewModel class using ViewModelProvider. At runtime, I\'m getting this error

Answer 1

As per the Lifecycle 2.2.0 release notes:

ViewModelProviders.of() deprecation: ViewModelProviders.of() has been deprecated. You can pass a Fragment or FragmentActivity to the new ViewModelProvider(ViewModelStoreOwner) constructor to achieve the same functionality when using Fragment 1.2.0.

That last part is important, as otherwise new ViewModelProvider(this) will only use the NewInstanceFactory you see in the exception, which doesn't support AndroidViewModel. AppCompat 1.1.0 only depends on Fragment 1.1.0, so you're not getting the support for the ViewModelProvider constructor you're using.

Therefore, you should upgrade to Fragment 1.2.0 or higher (currently 1.2.4):

implementation 'androidx.fragment:fragment:1.2.4'