如何使用RxJava处理回收站视图的项目单击 [英] How to handle Item clicks for a recycler view using RxJava

问题描述

我很想找出对回收者视图中的项目单击做出响应的最佳方法是什么.

I was interested to find out what is the best way to respond to a item click of a recycler view.

通常，我将向ViewHolder添加一个onclick()侦听器，并将结果通过接口传递回活动/片段.

Normally I would add a onclick() listener to the ViewHolder and pass back results to the activity/fragment through a interface.

我考虑过要在onBindViewHolder中添加一个Observable，但是我不想为每个项目绑定创建一个新的Observable.

I thought about adding a Observable in the onBindViewHolder but i do not want to create a new Observable for every item binding.

推荐答案

您可以使用 RxBinding ，然后在适配器内部创建一个主题，然后将所有事件重定向到该主题，并仅创建该主题的吸气剂以充当可观察对象，最后只订阅该可观察对象.

You can use RxBinding and then create a subject inside of your adapter, then redirect all the events to that subject and just create a getter of the subject to act as an observable and finally just subscribe you on that observable.

private PublishSubject<View> mViewClickSubject = PublishSubject.create();

public Observable<View> getViewClickedObservable() {
    return mViewClickSubject.asObservable();
}

@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup pParent, int pViewType) {
    Context context = pParent.getContext();
    View view = (View) LayoutInflater.from(context).inflate(R.layout.your_item_layout, pParent, false);
    ViewHolder viewHolder = new ViewHolder(view);

    RxView.clicks(view)
            .takeUntil(RxView.detaches(pParent))
            .map(aVoid -> view)
            .subscribe(mViewClickSubject);

    return viewHolder;
}

一个用法示例可以是:

mMyAdapter.getViewClickedObservable()
        .subscribe(view -> /* do the action. */);

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