轉換結果的錯誤HttpPost android

Question

我一直在從一個服務器拉一些JSON字符串的應用程序。要訪問JSON我需要做一個關鍵和祕密的職位。否則，我會收到一條錯誤消息，指出密鑰和/或祕密丟失。

我JSONfunctions.java

package com.spxc.ssa.streaming.task; 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.List; 

import org.apache.http.HttpEntity; 
import org.apache.http.HttpResponse; 
import org.apache.http.NameValuePair; 
import org.apache.http.client.ClientProtocolException; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.entity.UrlEncodedFormEntity; 
import org.apache.http.client.methods.HttpGet; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.entity.StringEntity; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.apache.http.message.BasicNameValuePair; 
import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 

import android.util.Log; 

public class JSONfunctions { 

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

     //http post 
     try{ 

      HttpClient httpclient = new DefaultHttpClient(); 
      HttpPost httppost = new HttpPost(url); 

      try { 
       // Add your data 
       List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2); 
       nameValuePairs.add(new BasicNameValuePair("key", "12345")); 
       nameValuePairs.add(new BasicNameValuePair("secret", "AndDev is Cool!")); 
       httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 

       // Execute HTTP Post Request 
       HttpResponse response = httpclient.execute(httppost); 

      } catch (ClientProtocolException e) { 
       // TODO Auto-generated catch block 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
      } 


       //mhfgpammv9f94ddayh8GSweji 

     }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; 
    } 
} 

我的活動：

package com.spxc.ssa.streaming; 

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

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

import android.app.ProgressDialog; 
import android.content.Intent; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.ListAdapter; 
import android.widget.ListView; 
import android.widget.SimpleAdapter; 

import com.actionbarsherlock.app.SherlockListActivity; 
import com.actionbarsherlock.view.MenuItem; 
import com.spxc.ssa.streaming.task.JsonAsync; 
import com.spxc.ssa.streaming.task.JsonAsync.JsonListener; 

public class ListMoviesController extends SherlockListActivity implements 
     OnClickListener { 

    private ProgressDialog mDialog; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     // getWindow().setFormat(PixelFormat.TRANSLUCENT); 
     setContentView(R.layout.dblist); 
     getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
     getSupportActionBar().setTitle("Movies"); 

     JsonAsync asyncTask = new JsonAsync(); 
     // Using an anonymous interface to listen for objects when task 
     // completes. 
     asyncTask.setJsonListener(new JsonListener() { 
      @Override 
      public void onObjectReturn(JSONObject object) { 
       handleJsonObject(object); 
      } 
     }); 
     // Show progress loader while accessing network, and start async task. 
     mDialog = ProgressDialog.show(this, getSupportActionBar().getTitle(), 
       getString(R.string.loading), true); 
     asyncTask.execute("http://sirsmokealot.ch/api/video/movies/"); 

    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     switch (item.getItemId()) { 
     case android.R.id.home: 
      finish(); 
      break; 
     } 
     return false; 
    } 

    @Override 
    public void onClick(View v) { 
     // TODO Auto-generated method stub 

    } 

    private void handleJsonObject(JSONObject object) { 
     ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>(); 

     try { 

      JSONArray shows = object.getJSONArray("items"); 

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

       map.put("video_id", String.valueOf(i)); 
       map.put("video_title", "" + e.getString("video_title")); 
       map.put("video_channel", "" + e.getString("video_channel")); 
       map.put("video_location", "" + e.getString("video_location")); 
       mylist.add(map); 
      } 
     } catch (JSONException e) { 
      Log.e("log_tag", "Error parsing data " + e.toString()); 
     } 

     ListAdapter adapter = new SimpleAdapter(this, mylist, R.layout.dbitems, 
       new String[] { "video_title", "video_location" }, new int[] { R.id.item_title, 
         R.id.item_subtitle }); 

     setListAdapter(adapter); 

     final ListView lv = getListView(); 
     lv.setTextFilterEnabled(true); 
     lv.setOnItemClickListener(new OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> parent, View view, 
        int position, long id) { 
       @SuppressWarnings("unchecked") 
       HashMap<String, String> o = (HashMap<String, String>) lv 
         .getItemAtPosition(position); 

       Intent myIntent = new Intent(ListMoviesController.this, 
         TestVideoController.class); 
       myIntent.putExtra("video_title", o.get("video_title")); 
       myIntent.putExtra("video_channel", o.get("video_channel")); 
       myIntent.putExtra("video_location", o.get("video_location")); 
       startActivity(myIntent); 
      } 
     }); 

     if (mDialog != null && mDialog.isShowing()) { 
      mDialog.dismiss(); 
     } 
    } 

} 

我logcat的說：

Error converting result java.lang.NullPointerException: lock == null 
Error parsing data org.json.JSONException: End of input at character 0 of 

任何幫助，非常感謝！由於

Answer 1

您正從服務器

響應

//之後錯過這些2線執行HTTP POST請求

HttpResponse response = httpclient.execute(httppost); 
HttpEntity httpEntity = httpResponse.getEntity(); 
is = httpEntity.getContent();