来自PHP LogCat的JSON：字符串无法转换为JSONObject

Question

我想从使用PHP的mySQL数据库中获取数据。这是我第一次使用JSON远程获取数据&的真正尝试。 php文件运行正常，因为它在浏览器中输出为JSON字符串，我使用JSONLint对其进行了修改。所以，我不确定我在这里有什么问题。任何帮助将不胜感激

这是logcat的是抛出：

Error parsing data org.json.JSONException: Value <?xml of type java.lang.String cannot be converted to JSONObject 
threadid=9: thread exiting with uncaught exception (group=0x401dce20) 
FATAL EXCEPTION: Thread-10 
java.lang.NullPointerException 
at com.andaero.test.JSON.JSONMain$1.run(JSONMain.java:39) 
at java.lang.Thread.run(Thread.java:1020) 

UPDATE：我从PHP文件中删除的回声法马克要求。我认为这与“JSONArray A = json.getJSONArray（”监管“），我也尝试过其他人的，没有办法为准做

这里是类：。

public class JSONfunctions { 

    public static JSONObject getJSONfromURL(String url) { 
     InputStream is = null; 
     String result = "regulatory"; 
     JSONObject jArray = null; 

     // http post 
     try { 
      HttpClient httpclient = new DefaultHttpClient(); 
      HttpPost httppost = new HttpPost(url); 
      HttpResponse response = httpclient.execute(httppost); 
      HttpEntity entity = response.getEntity(); 
      is = entity.getContent(); 

     } catch (Exception e) { 
      Log.e("log_tag", "Error in http connection " + e.toString()); 
     } 

     // convert response to string 
     try { 
      BufferedReader reader = new BufferedReader(new InputStreamReader(
        is, "iso-8859-1"), 8); 
      StringBuilder sb = new StringBuilder(); 
      String line = null; 
      while ((line = reader.readLine()) != null) { 
       sb.append(line + "\n"); 
      } 
      is.close(); 
      result = sb.toString(); 
     } catch (Exception e) { 
      Log.e("log_tag", "Error converting result " + e.toString()); 
     } 

     try { 

      jArray = new JSONObject(result); 
     } catch (JSONException e) { 
      Log.e("log_tag", "Error parsing data " + e.toString()); 
     } 

     return jArray; 
    } 
} 

列表活动：

public class JSONMain extends ListActivity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.listview); 

     final ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>(); 

     new Thread(new Runnable() { 
      public void run() { 
       JSONObject json = JSONfunctions 
         .getJSONfromURL("http://192.168.1.34/andaero/regulatory_list_ASC.php"); 

       try { 

        JSONArray a = json.getJSONArray("regulatory"); 

        for (int i = 0; i < a.length(); i++) { 
         HashMap<String, String> map = new HashMap<String, String>(); 
         JSONObject e = a.getJSONObject(i); 

         map.put("id", String.valueOf(i)); 
         map.put("label", e.getString("label")); 
         map.put("title", e.getString("title")); 
         map.put("caption", e.getString("description")); 
         map.put("dummy", e.getString("gotoURL")); 
         mylist.add(map); 
        } 
       } catch (JSONException e) { 
        Log.e("log_tag", "Error parsing data " + e.toString()); 
       } 
      } 
     }).start(); 

     ListAdapter adapter = new SimpleAdapter(this, mylist, 
       R.layout.list_item, new String[] { "label", "title", "caption", 
         "dummy" }, new int[] { R.id.label, R.id.listTitle, 
         R.id.caption, R.id.dummy }); 

     setListAdapter(adapter); 

     final ListView lv = getListView(); 
     lv.setTextFilterEnabled(true); 
     lv.setOnItemClickListener(new OnItemClickListener() { 
      public void onItemClick(AdapterView<?> parent, View view, 
        int position, long id) { 
       @SuppressWarnings("unchecked") 
       HashMap<String, String> o = (HashMap<String, String>) lv 
         .getItemAtPosition(position); 
       Toast.makeText(JSONMain.this, 
         "ID '" + o.get("id") + "' was clicked.", 
         Toast.LENGTH_SHORT).show(); 

      } 
     }); 
    } 
} 

编辑：的PHP：

<?php 
//MySQL Database Connect 
include 'andaerologin.php'; 

mysql_select_db("andaero"); 
$sql=mysql_query("select * from regulatory_list"); 

$output = new stdClass(); 
$output->regulatory = array(); 
while($row = mysql_fetch_assoc($sql)) { 
    $output->regulatory[] = $row; 
} 

header('Cache-Control: no-cache, must-revalidate'); 
header('Content-type: application/json'); 
echo (json_encode($output)); 

mysql_close(); 
?> 

的JSON返回的数据**（在部分 - 的数据是保密& JSON已经被验证为每以上!!）

[ 
{ 
_id: "**", 
label: "**", 
title: "**", 
description: "**", 
date: "**", 
gotoURL: null, 
intent: "QueryDisplay" 
}, * additional rows.....> 
] 
} 

Answer 1

很明显，你试图解析和收到Value <?xml of type java.lang.String，而不是那里的JSON数据