遇到「org.json.JSONException：java.lang.String類型的值不能轉換爲JSONObject」

我還是一個新手，我需要幫助。也許我錯過了一些東西......遇到「org.json.JSONException：java.lang.String類型的值不能轉換爲JSONObject」

這裏是我的PHP代碼

<?php 
    $con = mysqli_connect("localhost", "root", "", "customer"); 

    $order_name = $_POST["order_name"]; 
    $order_cust = $_POST["order_cust"]; 
    $quantity = $_POST["quantity"]; 

    $statement = mysqli_prepare($con, "INSERT INTO order (order_name, order_cust, quantity) VALUES (?, ?, ?)"); 
    mysqli_stmt_bind_param($statement, "sss", $order_name, $order_cust, $quantity); 
    mysqli_stmt_execute($statement); 

    $response = array(); 
    $response["success"] = true; 

    echo json_encode($response); 
?>

，然後這裏是我的響應代碼..

import com.android.volley.Response; 
import com.android.volley.toolbox.StringRequest; 

import java.util.HashMap; 
import java.util.Map; 


public class OrderRequest extends StringRequest { 

    private static final String ORDER_REQUEST_URL = "http://10.0.2.2/customer/Insert.php"; 
    private Map<String, String> params; 

    public OrderRequest(String order_name, String order_cust, String quantity, Response.Listener<String> listener){ 
     super(Method.POST, ORDER_REQUEST_URL, listener, null); 
     params = new HashMap<>(); 
     params.put ("order_name", order_name); 
     params.put ("order_cust", order_cust); 
     params.put ("quantity", quantity); 
    } 

    @Override 
    public Map<String, String> getParams() { 
     return params; 
    } 
}

最後，這是我的按鈕活動代碼...

bConfirm.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       final String user_id = etUsername.getText().toString(); 
       final String date = etDate.getText().toString(); 
       final String time = etTime.getText().toString(); 
       final String pax = etPax.getText().toString(); 

       Response.Listener<String> responseListener = new Response.Listener<String>() { 
        @Override 
        public void onResponse(String response) { 
         try{ 
          JSONObject jsonResponse = new JSONObject(response); 
          boolean success = jsonResponse.getBoolean("success"); 

          if(success){ 
           AlertDialog.Builder builder = new AlertDialog.Builder(ReservationActivity.this); 
           builder.setMessage("Success! Your reservation has been added to our Queue!").setNegativeButton("Confirm", null).create().show(); 
          }else{ 
           AlertDialog.Builder builder = new AlertDialog.Builder(ReservationActivity.this); 
           builder.setMessage("Reservation failed or missing credentials...").setNegativeButton("Retry", null).create().show(); 
          } 

         } catch (JSONException e) { 
          e.printStackTrace(); 
         } 
        } 
       }; 

       ReservationRequest reservationRequest = new ReservationRequest(user_id, date, time, pax, responseListener); 
       RequestQueue queue = Volley.newRequestQueue(ReservationActivity.this); 
       queue.add(reservationRequest); 
      } 
     });

這是LogCat

W/System.err: org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject

我需要幫助pleaseee ...

來源

2016-09-26 Nur Arif Safwan Abdullah

看來你的PHP代碼返回了一些JSON而不是一些JSON。它爲什麼這樣做？ – immibis

您所請求的網址不發送JSON，其向下發送HTML。所以你不能把它解析爲JSON。無論您的終端是錯誤的，它根本不會發送JSON，或者發送錯誤的HTML。或者你有服務器錯誤。

來源

2016-09-26 00:09:57

遇到「org.json.JSONException：java.lang.String類型的值不能轉換爲JSONObject」

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