Update ViewModel and View fails - kotlin

Question

I'm trying to use Fragment and ViewModel to update a value from my view using ViewModel.
The problem is that is not updating the value that I want to send via viewModel (now it's hardcoded but I'm thinking in an API request to know a number to set it into my viewModel using postValue and this is not working as I expected)
Here's my code:
Fragment
private var numberedValue = 0.0
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
setupObservers()
setupView()
}
private fun setupObservers(){
viewModel.obtainNumberedValue()
viewModel.getNumberedValue().observe(viewLifecycleOwner, { it ->
numberedValue = it
})
}
private fun setupView(){
binding.tvValue.text = numberedValue.toString()
}
ViewModel
private val numberedValue = MutableLiveData<Double>().apply { value = 0.0 }
fun obtainNumberedValue() {
numberedValue.postValue(200.00)
}
fun getNumberedValued(): LiveData<Double> = numberedValue
Ps. I got 0.0 instead 200.0

Answer 1

I think that you can improve your code if you do something like this
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
setupObservers()
}
private fun setupObservers(){
viewModel.obtainNumberedValue()
viewModel.getNumberedValue().observe(viewLifecycleOwner, { it ->
setupTextView(it)
})
}
private fun setupTextView(value: Double) {
binding.tvValue.text = "$value"
}
We remove this line private var numberedValue = 0.0
and we add the method inside to the observer method and in in we get any update in the value the ui will be updated