CODEWITHSUNDEEP
androidkotlinfragmentlifecycle
RWass
RWass

Reputation: 1

Android kotlin viewlifecycleowner sometimes is null in fragment

In my fragment, I use viewlifecycleowner to observe live data but in some cases my app crashes with this log:

Fatal Exception: java.lang.IllegalStateException: Can't access the Fragment View's LifecycleOwner when getView() is null i.e., before onCreateView() or after onDestroyView()

So I ask how to reproduce and avoid this issue please!

Upvotes: 0

Views: 1997

Answers (2)

herik hamzah
herik hamzah

Reputation: 1

I'm using observe(this@yourfragment) instead observe(viewlifecycleowner). And add @SuppressLint("FragmentLiveDataObserve") on the top of the method.

This work for me.

Upvotes: 0

mightyWOZ
mightyWOZ

Reputation: 8335

You should register your LiveData observer in Fragment's onViewCreated. where viewlifecycleowner can never be null.

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    viewModel.someLiveData.observe(viewLifecycleOwner, Observer<Something> { 
        // Update the UI.
    })
}

Upvotes: 1

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