adgvcxz / ViewModel

基于RxJava分离Model和View，通过Event更新Model和View

ViewModel

以RxJava为基础，分离Model与View，以Event来驱动更新Model和View

支持Activity Fragment RecyclerView ViewPager 以及普通自定义View

支持DSL:

viewModel.bindEvent {
    add({ start.clicks() }, { TimerViewModel.Event.StartButtonClicked })
    add({ stop.clicks() }, { TimerViewModel.Event.StopButtonClicked })
}

viewModel.bindModel {
    add({ status }, { time.text = "Timer" }) { filter { it == TimerViewModel.TimerStatus.Completed } }
    add({ time }, { time.text = toString() }) { filter { viewModel.currentModel().status == TimerViewModel.TimerStatus.Timing } }
}

以RecyclerView为例:

• 初始化

val viewModel = SimpleRecyclerViewModel()
// 多类型
// 配置每个ViewModel对应的View
val adapter = RecyclerAdapter(viewModel) {
    when (it) {
        is TextItemViewModel -> TextItemView()
        else -> LoadingItemView()
    }
}
recyclerView.layoutManager = LinearLayoutManager(this)
recyclerView.adapter = adapter

...

class TextItemView : IDefaultView<TextItemViewModel> {
    override fun bind(viewHolder: ItemViewHolder, viewModel: TextItemViewModel, position: Int) {
        //绑定View与Model
        ...
    }
}

• 更新

//刷新数据
viewmodel.action.onNext(SetData(arrayListOf()))

//在尾部插入数据
viewodel.action.onNext(AppendData(arrayListOf()))

等等...

也可以自定义想要的操作，仅仅发送一次事件，无需notifyDataSetChanged()或者notifyItemRangeInserted()等操作

内部已经实现自动Refresh或者LoadMore等操作，只需要

1. 绑定SwipeRefreshLayout

viewModel.toEventBind(disposables) {
    add({ refreshes() }, refreshLayout, { Refresh })
}

2. 实现request方法

override fun request(refresh: Boolean): Observable<IMutation> {
    //refresh: 
    //true: 下拉刷新数据
    //false: 列表在底部加载更多数据
    ...
}

• ItemClickListener(可以重复监听)

adapter.itemClicks().subscribe()

adapter.itemClicks().subscribe()

• 同步列表页面和详情页面的Model和View 同样只需要定义事件以及做好监听

导入

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}

dependencies {
    implementation 'com.github.adgvcxz.viewModel:viewmodel:0.7.4'
    implementation 'com.github.adgvcxz.viewModel:recyclerviewmodel:0.7.4'
    implementation 'com.github.adgvcxz.viewModel:viewpagermodel:0.7.4'
}

Thanks

ReactorKit