Communicate from composable to fragment using viewmodel

Question

Communicate from composable to fragment using viewmodel

I am having a Composable

@Composable
fun SimpleBottomButton(SCVM: StudioComposeViewModel) {
    Button(onClick = {
        SCVM.setbottomButtonClick(2)
    }) {
        Text(text = "Bottom Button")
    }
}

and a viewmodel

class ComposeViewModel(
    savedStateHandle: SavedStateHandle,
) : ViewModel() {
 private val _bottomButtonClick = MutableStateFlow(
        savedStateHandle["BottomButtonClick"] ?: 0
    )
    val bottomButtonClick
        get() =  _bottomButtonClick.asStateFlow()
    fun setbottomButtonClick(valuer: Int) {
        _bottomButtonClick.value = valuer
    }

}

in the fragment I want to get the data from viewmodel in a Fragment using this

 viewLifecycleOwner.lifecycleScope.launch {
            SCVM.bottomButtonClick.flowWithLifecycle(viewLifecycleOwner.lifecycle, Lifecycle.State.STARTED)
                .collect {
                    Log.e("bottomButtonClick",it.toString())

                    Toast.makeText(requireActivity(), it.toString(),Toast.LENGTH_SHORT).show()

                }
        }

However the data is not received

Answer 1

I think you will receive the first click event as your state flow changes its value from 0 to 2. All the next events will not be emitted because StateFlow will not emit a new value if the new value is equal to its current value.

See

Values in state flow are conflated using Any.equals comparison in a similar way to distinctUntilChanged operator.