Question

您好我试图在Android studio中使用Kotlin提取我的JSON文件的数据：

这是我的JSON文件：

val future = RequestFuture.newFuture < JSONObject > ()
val request = JsonObjectRequest("localhost", JSONObject(), future, future)
val requestQueue = Volley.newRequestQueue(this)
requestQueue.add(request)

try {

  val array = JSONObject().getJSONArray("server_response")
  for (i in 0..array.length() - 1) {
    val objectYear = array.getJSONObject(i)
    val year = objectYear.getString("birthday")


    val response = future.get() // this will block
    textView2.setText(year.toString) // It does not work
  }
} catch (e: JSONException) {
  e.printStackTrace()
}

我想在textView2中显示值年份，谢谢你的帮助!!!

Answer 1

试试这个

var jsonData = JSONObject()
val future = RequestFuture.newFuture < JSONObject > ()
var listener = Response.Listener<JSONObject>() {
        fun onResponse(response: JSONObject) {
            try {

                val array = response.getJSONArray("server_response")
                for (i in 0..array.length() - 1) {
                    val objectYear = array.getJSONObject(i)
                    val year = objectYear.getString("birthday")
                    val response = future.get() // this will block
                    textView2.setText(year.toString) // It does not work
                }
            } catch (e: JSONException) {
                e.printStackTrace()
            }
        }
    }
val request = JsonObjectRequest("localhost",jsonData , listener , future)
val requestQueue = Volley.newRequestQueue(this)
requestQueue.add(request)
requestQueue.start()

为什么我无法获取我的JSON文件的值？

1 个答案: