Kotlin：如何从 Rxjava 一次输出 ArrayList答案

【问题标题】：Kotlin: How to Output at a time the ArrayList from RxjavaKotlin：如何从 Rxjava 一次输出 ArrayList
【发布时间】：2020-01-23 09:14:08
【问题描述】：

我想在 ArrayList 的时候打印。

之前：

class ExampleUnitTest {
    @Test
    fun test(){
        val stringArray = arrayOf("10", "20", "30", "40", "30", "20", "10", "5", "20", "30", "20", "30").map { it }
        println(stringArray.toString())
    }
}

# output is :
[10, 20, 30, 40, 30, 20, 10, 5, 20, 30, 20, 30]

之后：

# I Want to output Like this :
10, 20, 30, 40, 30, 20, 10, 5, 20, 30, 20, 30

如何通过 Reactivex Java(RxJava) 进行这种编码

# something like... e.g..
Observable ...{
   ... ...
}.subscribeOn(Schedulers.io())
.subscribe({
   ... ...
})

【问题讨论】：

Observable.just(someList) 会给你 1 个发射 - 一个列表

标签： java android kotlin rx-java rx-kotlin

【解决方案1】：

我自己解决了这个问题！

val sample = listOf("a","b","c","d","e","f","g")
        Observable.fromIterable(sample.withIndex())
            .subscribeOn(Schedulers.io())
            .subscribe({ (index, item) ->
                print(if(sample.size > index) item else "$item, ")
                println()
            },
            { e -> e.printStackTrace() },
            { println("finished!") }
        )

【讨论】：

【解决方案2】：

您可以使用 fromArray 运算符和一些字符串内置函数

      val stringArray = arrayOf("10", "20", "30", "40", "30", "20", "10", "5", "20", "30", "20", "30")

        Observable.fromArray(stringArray).map {
            Arrays.toString(it).replace("[","").replace("]","")
        } .subscribe(
            {
//               Desired OP: 10, 20, 30, 40, 30, 20, 10, 5, 20, 30, 20, 30
                Log.d("test"," $it")
            }
        )

【讨论】：