如何使用flightstatus API它在Android

Question

我試圖使用API​​便可獲得飛行狀態返回null flightstatus.com

的httpEntity.getContent();得到空從URL

，它給錯誤

status: 405 
code: METHOD_NOT_ALLOWED 
message: Method not allowed. 

和日誌所賜：

org.json.JSONException: Value status of type java.lang.String cannot be converted to JSONObject 

請幫助

I'm using the following url

和下面的代碼

主java類

package com.airportkwt; 

import java.util.ArrayList; 
import java.util.HashMap; 

import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 

import android.app.Activity; 
import android.app.ListActivity; 
import android.app.ProgressDialog; 
import android.os.Bundle; 
import android.os.StrictMode; 
import android.util.Log; 
import android.view.KeyEvent; 
import android.view.Window; 
import android.widget.ListAdapter; 
import android.widget.ListView; 
import android.widget.SimpleAdapter; 

public class FlightStatus extends ListActivity { 

    // url to make request 
    private static String url = "https://api.flightstats.com/flex/flightstatus/rest/v2/json/airport/status/OKBK/dep/2013/2/27/13?appId=16decbe1&appKey=2ed0ada41c7ef6c31253ce11c93b8692&utc=false&numHours=6&maxFlights=10"; 

    // JSON Node names 
    private static final String TAG_Array = "flightStatuses"; 
    private static final String TAG_ID = "flightId"; 
    private static final String TAG_DepAIrportCode = "departureAirportFsCode"; 
    private static final String TAG_ArrAIrportCode = "arrivalAirportFsCode"; 
    private static final String TAG_FlightNum = "flightNumber"; 

    // contacts JSONArray 
    JSONArray contacts = null; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.flightstatus); 

     if (android.os.Build.VERSION.SDK_INT > 9) { 
       StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); 
       StrictMode.setThreadPolicy(policy); 
      } 






     // Hashmap for ListView 
     ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>(); 

     // Creating JSON Parser instance 
     jsonParser jParser = new jsonParser(); 

     // getting JSON string from URL 
     JSONObject json = jParser.getJSONFromUrl(url); 

     try { 
      // Getting Array of Contacts 
      contacts = json.getJSONArray(TAG_Array); 

      // looping through All Contacts 
      for(int i = 0; i < contacts.length(); i++){ 
       JSONObject c = contacts.getJSONObject(i); 

       // Storing each json item in variable 
       String id = c.getString(TAG_ID); 
       String name = c.getString(TAG_DepAIrportCode); 
       String email = c.getString(TAG_ArrAIrportCode); 
       String address = c.getString(TAG_FlightNum); 


      // creating new HashMap 
       HashMap<String, String> map = new HashMap<String, String>(); 

       // adding each child node to HashMap key => value 
       map.put(TAG_ID, id); 
       map.put(TAG_DepAIrportCode, name); 
       map.put(TAG_ArrAIrportCode, email); 

       // adding HashList to ArrayList 
       contactList.add(map); 
      } 



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




     /** 
     * Updating parsed JSON data into ListView 
     * */ 
     ListAdapter adapter = new SimpleAdapter(this, contactList, 
       R.layout.list_departures, 
       new String[] { TAG_DepAIrportCode, TAG_ArrAIrportCode }, new int[] { 
         R.id.name, R.id.email, R.id.mobile }); 

     setListAdapter(adapter); 

jsonParser的Java類

package com.airportkwt; 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.io.UnsupportedEncodingException; 

import org.apache.http.HttpEntity; 
import org.apache.http.HttpResponse; 
import org.apache.http.client.ClientProtocolException; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.json.JSONException; 
import org.json.JSONObject; 

import android.os.AsyncTask; 
import android.util.Log; 

public class jsonParser { 

    static InputStream is = null; 
    static JSONObject jObj = null; 
    static String json = ""; 

    // constructor 
    public jsonParser() { 

    } 

    public JSONObject getJSONFromUrl(String url) { 

     // Making HTTP request 
     try { 
      // defaultHttpClient 
      DefaultHttpClient httpClient = new DefaultHttpClient(); 
      HttpPost httpPost = new HttpPost(url); 


      HttpResponse httpResponse = httpClient.execute(httpPost); 
      HttpEntity httpEntity = httpResponse.getEntity(); 
      is = httpEntity.getContent();   

     } catch (UnsupportedEncodingException e) { 
      e.printStackTrace(); 
     } catch (ClientProtocolException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 

     try { 
      BufferedReader reader = new BufferedReader(new InputStreamReader(
        is), 8); 
      StringBuilder sb = new StringBuilder(); 
      String line = null; 
      while ((line = reader.readLine()) != null) { 
       sb.append(line + "\n"); 
      } 
      is.close(); 
      json = sb.toString(); 
     } catch (Exception e) { 
      Log.e("Buffer Error", "Error converting result " + e.toString()); 
     } 

     // try parse the string to a JSON object 
     try { 
      jObj = new JSONObject(json); 
     } catch (JSONException e) { 
      Log.e("JSON Parser", "Error parsing data " + e.toString()); 
     } 

     // return JSON String 
     return jObj; 

    } 
} 

---

Answer 1

我找到了解決辦法

的API返回休息，需要休息的要求不是JSON

public static JSONObject queryRESTurl(String url) { 
     HttpClient httpclient = new DefaultHttpClient(); 
     HttpGet httpget = new HttpGet(url); 
     HttpResponse response; 

     try { 
       response = httpclient.execute(httpget); 
       Log.i("TAG", "Status:[" + response.getStatusLine().toString() + "]"); 
       HttpEntity entity = null; 
       try{ 
        entity = response.getEntity(); 
       }catch(Exception e){ 
        Log.e("log_tag", "Error in http connection "+e.toString()); 
       } 
       if (entity != null) { 

        InputStream instream = entity.getContent(); 

         String result = RestClient.convertStreamToString(instream); 
         Log.i("TAG", "Result of converstion: [" + result + "]"); 

         instream.close(); 
         //return result; 

         try { 
          jObj = new JSONObject(result); 
         } catch (JSONException e) { 
          Log.e("JSON Parser", "Error parsing data " + e.toString()); 
         } 
         return jObj; 

       } 
     } catch (ClientProtocolException e) { 
       Log.e("REST", "There was a protocol based error", e); 
     } catch (IOException e) { 
       Log.e("REST", "There was an IO Stream related error", e); 
     } 

     return null; 
    }