Question

我是android studio“kotlin”的新用户，我尝试从url数据json，内容JSONObject和JSONArray获取信息，我的代码正常工作和JSONObject很好，但我仍然遇到JSONArray的问题。

这是我的代码，任何人都可以帮助我如何从我的网址获取JSONArray

  fun buclick(view:View){
        val flightSearch=editText2.text.toString()
        val url="xxxxxxx-flight=$flightSearch"
    MyAsyncTask().execute(url)
    }


    inner  class  MyAsyncTask:AsyncTask<String,String,String>(){

        override fun onPreExecute() {
            super.onPreExecute()
        }

        override fun doInBackground(vararg p0: String?): String {
            //تمرير بيانات هنا
            try {
                val url=URL(p0[0])
                val urlConnect = url.openConnection() as HttpURLConnection
                urlConnect.connectTimeout=500

                val dataJsonAsString=convertStreanToString(urlConnect.inputStream)
                publishProgress(dataJsonAsString)
            }catch (ex:Exception){

            }

            return  ""
        }


        override fun onProgressUpdate(vararg values:String?) {

            val json=JSONObject(values[0])
            val query= json.getJSONObject("identification")
            val sunrise=query.getString("id")
            flighttext.text="sunrise time" + sunrise

        }
        override fun onPostExecute(result: String?) {
            super.onPostExecute(result)
        }

        fun convertStreanToString(inputStream:InputStream):String{
            val  bufferReader = BufferedReader(InputStreamReader(inputStream))
            var line:String
            var allstring:String=""

            try {
                do {
                    line=bufferReader.readLine()
                    if(line!=null)
                        allstring+=line
                }while (line!=null)
                bufferReader.close()
            }catch (ex:Exception){}


            return allstring
        }

    }

//مالنا شغل ببيها
    override fun onBackPressed() {
        if (drawer_layout.isDrawerOpen(GravityCompat.START)) {
            drawer_layout.closeDrawer(GravityCompat.START)
        } else {
            super.onBackPressed()
        }
    }

my data json url

Answer 1

以下是如何从此响应中获取可用性数组。

{＆＃34;身份证明＆＃34;：{ ＆＃34; id＆＃34;：＆＃34; f7c2de9＆＃34;，＆＃34; row＆＃34;：4606622416，＆＃34; number＆＃34;：{ ＆＃34;默认＆＃34;：＆＃34; QR402＆＃34;，＆＃34;替代＆＃34;：null }，＆＃34;呼号＆＃34;：＆＃34; QTR402＆＃34; }，＆＃34;可用性＆＃34;：[ ＆＃34; AGE＆＃34 ;, ＆＃34; MSN＆＃34; ]}

    val json=JSONObject(values[0])
    val availabilityArray = json.getJSONArray("availability")

您的代码应该像

 fun buclick(view:View){
        val flightSearch=editText2.text.toString()
        val url="xxxxxxx-flight=$flightSearch"
    MyAsyncTask().execute(url)
    }


    inner  class  MyAsyncTask:AsyncTask<String,String,String>(){

        override fun onPreExecute() {
            super.onPreExecute()
        }

        override fun doInBackground(vararg p0: String?): String {
            //تمرير بيانات هنا
            try {
                val url=URL(p0[0])
                val urlConnect = url.openConnection() as HttpURLConnection
                urlConnect.connectTimeout=500

                val dataJsonAsString=convertStreanToString(urlConnect.inputStream)
                publishProgress(dataJsonAsString)
                val json=JSONObject(dataJsonAsString);
                ///here is the required array
                val availabilityArray = json.getJSONArray("availability")
                val query= json.getJSONObject("identification")
                val sunrise=query.getString("id")
                flighttext.text="sunrise time" + sunrise
            }catch (ex:Exception){

            }

            return  ""
        }


        override fun onProgressUpdate(vararg values:String?) {

//update progressbar


        }
        override fun onPostExecute(result: String?) {
            super.onPostExecute(result)
        }

        fun convertStreanToString(inputStream:InputStream):String{
            val  bufferReader = BufferedReader(InputStreamReader(inputStream))
            var line:String
            var allstring:String=""

            try {
                do {
                    line=bufferReader.readLine()
                    if(line!=null)
                        allstring+=line
                }while (line!=null)
                bufferReader.close()
            }catch (ex:Exception){}


            return allstring
        }

    }

//مالنا شغل ببيها
    override fun onBackPressed() {
        if (drawer_layout.isDrawerOpen(GravityCompat.START)) {
            drawer_layout.closeDrawer(GravityCompat.START)
        } else {
            super.onBackPressed()
        }
    }

Answer 2

尝试以下代码

val availabilityArray = json.getJSONArray("availability")

        for (i in 0 until availabilityArray.length()){
            val winspeed = availabilityArray.getString(i);
            text.setText(winspeed)
        }

如何从url获取kotlin中的Array json

2 个答案: