RxJava:如何将对象列表转换为另一个对象列表 [英] RxJava: How to convert List of objects to List of another objects

问题描述

我有SourceObjects列表，我需要将其转换为ResultObjects列表.

I have the List of SourceObjects and I need to convert it to the List of ResultObjects.

我可以使用ResultObject的方法将一个对象获取到另一个对象:

I can fetch one object to another using method of ResultObject:

convertFromSource(srcObj);

我当然可以这样:

public void onNext(List<SourceObject> srcObjects) {
   List<ResultsObject> resObjects = new ArrayList<>();
   for (SourceObject srcObj : srcObjects) {
       resObjects.add(new ResultsObject().convertFromSource(srcObj));
   }
}

但对于能够展示如何使用 rxJava 进行相同操作的人，我将不胜感激.

but I will be very appreciate to someone who can show how to do the same using rxJava.

推荐答案

如果您的 Observable 发出 List ，则可以使用以下运算符:

If your Observable emits a List, you can use these operators:

• flatMapIterable (将您的列表转换为Observable项)
• 地图(将您的商品转换为其他商品)

• toList 运算符(将完成的Observable转换为Observable，后者从完成的Observable发出项目列表)

• flatMapIterable (transform your list to an Observable of items)
• map (transform your item to another item)

• toList operators (transform a completed Observable to a Observable which emit a list of items from the completed Observable)

Observable<SourceObjet> source = ...
source.flatMapIterable(list -> list)
      .map(item -> new ResultsObject().convertFromSource(item))
      .toList()
      .subscribe(transformedList -> ...);

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