Android Arch Components ViewModel and LiveData trigger after screen rotation

Question

I have a problem when using ViewModel and LiveData I am new using ViewModel and LiveData arch components and have the problem when using frag

Answer 1

It's how LiveData and ViewModel works. You are getting same ViewModel with same LiveData and LiveData has previous object, User for instance, with previous credentials when you call ViewModelProviders.of(this).get(MainViewModel::class.java). You can reset User of LiveData onPause()or onStop() to reset it to initial state.

I don't know how you call toast, if you can share your ViewModel and MainActivity i can be more specific.