Michael Ferguson fergusonm

Android developer at 1Password (opinions expressed are my own and not that of my employer)

fergusonm / gist:bc12dfe20562389c6064c1efa158ce66

Created September 3, 2019 14:29

Method level logging live template. Logs the method name with all arguments.

	Saved as "mlog" with Kotlin statement applicability. (Obviously change to suit your own needs.)

	android.util.Log.d("LOGLOGLOG", "$className$ $METHOD_NAME$() called with: " + $args$)

	Params:
	classname - kotlinClassName()
	METHOD_NAME - kotlinFunctionName()
	args - groovyScript("'\"' + _1.collect { it + ' = [\" + ' + it + ' + \"]'}.join(', ') + '\"'", functionParameters())

fergusonm / gist:fb1da641246bd68275597561baa636e7

Last active September 26, 2022 08:01

Single Live Event Stream Sample

	class MainViewModel : ViewModel() {

	sealed class Event {
	object NavigateToSettings: Event()
	data class ShowSnackBar(val text: String): Event()
	data class ShowToast(val text: String): Event()
	}

	private val eventChannel = Channel<Event>(Channel.BUFFERED)
	val eventsFlow = eventChannel.receiveAsFlow()

fergusonm / MainViewModel

Created January 26, 2021 23:03

	class MainViewModel : ViewModel() {

	sealed class Event {
	object NavigateToSettings: Event()
	data class ShowSnackBar(val text: String): Event()
	data class ShowToast(val text: String): Event()
	}

	private val eventChannel = Channel<Event>(Channel.BUFFERED)
	val eventsFlow = eventChannel.receiveAsFlow()

fergusonm / launch in example

Last active February 21, 2021 23:55

Fragment, observe using view lifecycle scope

	override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
	super.onViewCreated(view, savedInstanceState)
	viewModel.eventsFlow
	.onEach {
	when (it) {
	is MainViewModel.Event.NavigateToSettings -> {}
	is MainViewModel.Event.ShowSnackBar -> {}
	is MainViewModel.Event.ShowToast -> {}
	}
	}

fergusonm / gist:32b5be1af5bf6dd1f7f286c2f1081eda

Last active March 15, 2021 19:18

lanchWhenX flow collector

	override fun onCreate(savedInstanceState: Bundle?) {
	super.onCreate(savedInstanceState)
	// get your view model here

	lifecycleScope.launchWhenStarted {
	viewModel.eventsFlow
	.collect {
	when (it) {
	MainViewModel.Event.NavigateToSettings -> {}
	is MainViewModel.Event.ShowSnackBar -> {}

fergusonm / gist:29a27494714dd65c1588a593b88a9dcf

Created January 26, 2021 23:06

rxjava observation between start and stop

	override fun onStart() {
	super.onStart()
	disposable = viewModel.eventsFlow
	.asObservable() // converting to Rx for the example
	.subscribe {
	when (it) {
	MainViewModel.Event.NavigateToSettings -> {}
	is MainViewModel.Event.ShowSnackBar -> {}
	is MainViewModel.Event.ShowToast -> {}
	}

fergusonm / gist:35a9b2ac4ba885ffc659db492f1f83c2

Created January 26, 2021 23:07

flow observation between start and stop

	override fun onStart() {
	super.onStart()
	job = viewModel.eventsFlow
	.onEach {
	when (it) {
	MainViewModel.Event.NavigateToSettings -> {}
	is MainViewModel.Event.ShowSnackBar -> {}
	is MainViewModel.Event.ShowToast -> {}
	}
	}

fergusonm / FlowObserver.kt

Created January 26, 2021 23:07

Flow observer

	class FlowObserver<T> (
	lifecycleOwner: LifecycleOwner,
	private val flow: Flow<T>,
	private val collector: suspend (T) -> Unit
	) {

	private var job: Job? = null

	init {
	lifecycleOwner.lifecycle.addObserver(LifecycleEventObserver {

fergusonm / Example observers

Last active February 22, 2021 00:05

Fragment flow observer usage

	override fun onCreate(savedInstanceState: Bundle?) {
	super.onCreate(savedInstanceState)

	viewModel.eventsFlow
	.onEach {
	when (it) {
	MainViewModel.Event.NavigateToSettings -> {}
	is MainViewModel.Event.ShowSnackBar -> {}
	is MainViewModel.Event.ShowToast -> {}
	}

fergusonm / gist:2a87652f85e7391b922245e7e1412958

Created January 26, 2021 23:09

Basic one shot event flow

	private val eventChannel = Channel<Event>(Channel.BUFFERED)
	val eventsFlow = eventChannel.receiveAsFlow()