重复利用同一AsyncTask的最佳解决方案? [英] Optimal solution for utilizing the same AsyncTask repeatedly?

问题描述

我知道AsyncTask只能运行一次.我知道一种解决方法，但是我需要AsyncTask中的一个使用复杂(?)进程的变量.这是我用于调用AsyncTask的代码

I know that an AsyncTask can be run only once. I know a way around that, but I need a variable from the AsyncTask that uses complicated(?) processes. This is my code for calling the AsyncTask

val thr=NewTask()
    thr.delegate = this
    button.setOnClickListener {
        thr.execute()
    }

NewTask.doOnBackground()只是将请求发送到URL的普通方法. onPostExecute()有点不同:

NewTask.doOnBackground() is just a normal method sending the request to the URL. onPostExecute() is a bit different:

public override fun onPostExecute(result: String?) {
    //super.onPostExecute(result)
    delegate!!.processFinish(result!!)
}

委托是AsyncResponse的变量吗?这是一个包含processFinish抽象方法的接口，该方法采用字符串，不返回任何内容.

with delegate being a variable of AsyncResponse? which is an interface containing processFinish abstract method taking a string and returning nothing.

我的问题是，如何在仍然获得响应的同时重复运行AsyncTask?预先感谢.

My question is, how can I run the AsyncTask repeatedly while still getting the response? Thanks in advance.

推荐答案

最后，我决定使用协程.协程易于使用，比AsyncTask容易得多.我不知道为什么我怕他们.这是我使用的代码:

Finally, I settled on using coroutines with this. Coroutines are easy to use, much easier than AsyncTask. I don't know why I was scared of them. Here is the code I used:

class CoRoutine{
suspend fun httpGet(url: String = "https://boogle.org): String {
    val arr = ArrayList<String>()
    withContext(Dispatchers.IO) {
        val url = URL(url)

        with(url.openConnection() as HttpURLConnection) {
            requestMethod = "GET"  // optional default is GET

            //arr.add(responseCode)

            inputStream.bufferedReader().use {
                it.lines().forEach { line ->
                    //println(line)
                    arr.add(line as String)
                }
            }
        }
    }
    return arr.get(0)
}
}

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