RxPM-library

Reactive implementation of Presentation Model pattern in Android

Transcript

1. RxPM — реактивная реализация паттерна Presentation Model Дмитрий Горбунов Senior Android Developer
2. Why Use RxPM?
3. RxPM
4. val inProgress = State<Boolean>(initialValue = false) // Изменяем значение в PresentationModel inProgress.consumer.accept(true) // Подписываемся на изменения во View pm.inProgress.observable.bindTo(progressBar.visibility()) RxPM - State 4
5. val buttonClicks = Action<Unit>() // Слушаем клики в PresentationModel buttonClicks.observable .subscribe { // handle click } .untilDestroy() // Привязываемся во View button.clicks().bindTo(pm.buttonClicks.consumer) RxPM - Action 5
6. val errorMessage = Command<String>(bufferSize = 1) // Посылаем сообщение из PresentationModel errorMessage.consumer.accept(message) // Слушаем команды во View pm.errorMessage.observable.bindTo { // show alert dialog } RxPM - Command 6
7. RxPM - Command 7
8. class DataPresentationModel(private val dataModel: DataModel) : PresentationModel() { val data = State<List<Item>>(emptyList()) val inProgress = State(false) val errorMessage = Command<String>() val refreshAction = Action<Unit>() // ... } RxPM - PresentationModel 8
9. class DataPresentationModel(private val dataModel: DataModel) : PresentationModel() { val data = State<List<Item>>(emptyList()) val inProgress = State(false) val errorMessage = Command<String>() val refreshAction = Action<Unit>() override fun onCreate() { super.onCreate() refreshAction.observable .skipWhileInProgress(inProgress.observable) .flatMapSingle { dataModel.loadData() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .bindProgress(inProgress.consumer) .doOnError { errorMessage.consumer.accept("Loading data error") } } .retry() .subscribe(data.consumer) .untilDestroy() // обновляем данные при входе на экран refreshAction.consumer.accept(Unit) } } RxPM - PresentationModel 9
10. class DataFragment : PmSupportFragment<DataPresentationModel>() { override fun providePresentationModel() = DataPresentationModel(DataModel()) override fun onBindPresentationModel(pm: DataPresentationModel) { pm.inProgress.observable.bindTo(swipeRefreshLayout.refreshing()) pm.data.observable.bindTo { // adapter.setItems(it) } pm.errorMessage.observable.bindTo { // show alert dialog } swipeRefreshLayout.refreshes().bindTo(pm.refreshAction.consumer) } } RxPM - PmView 10
11. Two-way Data Binding 11
12. Two-way Data Binding 12
13. Two-way Data Binding 13
14. Two-way Data Binding 14
15. Two-way Data Binding 15
16. Two-way Data Binding 16
17. Two-way Data Binding 17
18. RxPM - Controls 18 // Объявляем в PresentationModel val name = inputControl( formatter = { it.take(50).toUpperCase() } ) val checked = checkControl(initialChecked = false) // Привязываем виджеты во View pm.name bindTo editText pm.checked bindTo checkBox
19. Спасибо за внимание! /** * @author Dmitriy Gorbunov (dmdev) * @author Vasili Chyrvon (Jeevuz) */ Telegram : https://t.me/Rx_PM GitHub : https://github.com/dmdevgo/RxPM Habrahabr : https://habrahabr.ru/company/mobileup/blog/326962/ https://habrahabr.ru/company/mobileup/blog/342850/ Дмитрий Горбунов: dg@mobileup.ru