Kotlin Android debounce

Question

Is there any fancy way to implement debounce logic with Kotlin Android?

I\'m not using Rx in project.

There is a way in Java, but it is too big

Answer 1

@masterwork,

Great answer. This is my implementation for a dynamic searchbar with an EditText. This provides great performance improvements so the search query is not performed immediately on user text input.

    fun AppCompatEditText.textInputAsFlow() = callbackFlow {
        val watcher: TextWatcher = doOnTextChanged { textInput: CharSequence?, _, _, _ ->
            offer(textInput)
        }
        awaitClose { this@textInputAsFlow.removeTextChangedListener(watcher) }
    }

        searchEditText
                .textInputAsFlow()
                .map {
                    val searchBarIsEmpty: Boolean = it.isNullOrBlank()
                    searchIcon.isVisible = searchBarIsEmpty
                    clearTextIcon.isVisible = !searchBarIsEmpty
                    viewModel.isLoading.value = true
                    return@map it
                }
                .debounce(750) // delay to prevent searching immediately on every character input
                .onEach {
                    viewModel.filterPodcastsAndEpisodes(it.toString())
                    viewModel.latestSearch.value = it.toString()
                    viewModel.activeSearch.value = !it.isNullOrBlank()
                    viewModel.isLoading.value = false
                }
                .launchIn(lifecycleScope)
    }