Android jetpack navigation component result from dialog

Question

So far I\'m successfully able to navigate to dialogs and back using only navigation component. The problem is that, I have to do some stuff in dialog and return result to the fr

Answer 1

When you use Navigation Component with dialogs, this part of code looks not so good (for me it returned nothing)

navController.currentBackStackEntry?.savedStateHandle?.getLiveData("key")?.observe(
viewLifecycleOwner) { result ->
// Do something with the result.}

You need to try way from official docs and it help me a lot

This part is working for me:

 val navBackStackEntry = navController.getBackStackEntry(R.id.target_fragment_id)

    // Create observer and add it to the NavBackStackEntry's lifecycle
    val observer = LifecycleEventObserver { _, event ->
        if (event == Lifecycle.Event.ON_RESUME
            && navBackStackEntry.savedStateHandle.contains("key")
        ) {
            val result =
                navBackStackEntry.savedStateHandle.get("key")
            // Do something with the result

        }
    }
    navBackStackEntry.lifecycle.addObserver(observer)

    // As addObserver() does not automatically remove the observer, we
    // call removeObserver() manually when the view lifecycle is destroyed
    viewLifecycleOwner.lifecycle.addObserver(LifecycleEventObserver { _, event ->
        if (event == Lifecycle.Event.ON_DESTROY) {
            navBackStackEntry.lifecycle.removeObserver(observer)
        }
    })

And in your dialog:

navController.previousBackStackEntry?.savedStateHandle?.set(
            "key",
            true
        )