How to browse stepper from inside a fragment

[mspnr]

Here is a question regarding your example of using the stepper.

In your example with numbered tabs stepper, the only way to go to next step is by clicking the button in the activity itself: https://github.com/acefalobi/android-stepper/blob/9859d114536e1a7015beb5fc1b77cefa1fa4955a/app/src/main/java/com/aceinteract/android/stepper/presentation/samples/NumberedTabStepperActivity.kt#L60

I would like to build some buttons for going back and forth in the fragment itself (because some processing logic is related to the steps).

What would be your advice to trigger jump between steps from inside the fragment?

[acefalobi]

An easy way to get this done would be to use a shared viewmodel with an observer.

Something like this in your viewmodel

private val _stepChange = MutableStateFlow(StepChangeType.IDLE)
val stepChange: StateFlow<StepChangeType>get() = _stepChange

fun goToNextStep() {
    _stepChange.value = StepChangeType.NEXT_STEP
}

fun goToPreviousStep() {
    _stepChange.value = StepChangeType.PREVIOUS_STEP
}

In your activity, you can then collect the flow.

viewModel.stepChange.onEach {
    when (it.type) {
        StepChangeType.NEXT_STEP -> stepper.goToNextStep()                    
        StepChangeType.PREVIOUS_STEP -> stepper.goToPreviousStep()
    }
}.launchIn(lifecycleScope)

StepChange.kt

enum class StepChangeType { IDLE, NEXT_STEP, PREVIOUS_STEP }

You could also use LiveData for this.

[acefalobi]

Closing this because it seems it has been answered