的AsyncTask的Android強制關閉應用程序

可能重複：
Android Runtime Verify Error 的AsyncTask的Android強制關閉應用程序

我試圖讓一個應用程序從一個YouTube頻道顯示可用的視頻列表稱爲illbehonest。我究竟做錯了什麼？我正在使用Java-JSON庫來做到這一點。每當我嘗試去VideoPlay活動（順便說一句，它的名字與它的功能無關），應用程序強制關閉。下面的代碼：

package com.aer.illbehonest; 

import java.io.IOException; 
import java.io.InputStream; 
import java.net.MalformedURLException; 
import java.net.URL; 
import java.net.URLConnection; 
import java.util.ArrayList; 

import net.sf.json.JSONArray; 
import net.sf.json.JSONObject; 
import net.sf.json.JSONSerializer; 

import org.apache.commons.io.IOUtils; 

import android.app.Activity; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.widget.ArrayAdapter; 
import android.widget.ListView; 

public class VideoPlay extends Activity { 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_video_play); 

     new ShowTitlesTask().execute(""); 
    } 

    class ShowTitlesTask extends AsyncTask<String, Void, ArrayList<String>> { 

     ArrayList<String> titlesList; 

     @Override 
     protected ArrayList<String> doInBackground(String... args) { 

      URL jsonURL = null; 
      try { 
       jsonURL = new URL("http://gdata.youtube.com/feeds/api/users/illbehonest/uploads?v=2&alt=jsonc"); 
      } catch (MalformedURLException e3) { 
       e3.printStackTrace(); 
      } 
      URLConnection jc = null; 
      try { 
       jc = jsonURL.openConnection(); 
      } catch (IOException e2) { 
       e2.printStackTrace(); 
      } 
       InputStream is = null; 
      try { 
       is = jc.getInputStream(); 
     } catch (IOException e1) { 
     e1.printStackTrace(); 
      } 
      String jsonTxt = null; 
      try { 
       jsonTxt = IOUtils.toString(is); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 

      JSONObject json = (JSONObject) JSONSerializer.toJSON(jsonTxt); 

      JSONObject jdata = json.getJSONObject("data"); 

      JSONArray jentry = jdata.getJSONArray("items"); 
      for (int entryNumber = 0; entryNumber<=25; entryNumber++){ 
        JSONObject entry = jentry.getJSONObject(entryNumber); 
        titlesList.add(entry.getString("title")); 
      } 

      return titlesList; 
    } 
    protected void onPostExecute(ArrayList<String> result) { 
     ListView listView = (ListView)VideoPlay.this.findViewById(R.id.videolist); 
     ArrayAdapter<String> adapter = new ArrayAdapter<String> (VideoPlay.this, 
       android.R.layout.simple_list_item_1, android.R.id.text1, titlesList); 
      (listView).setAdapter(adapter); 
     } 

    } 
}

這裏的logcat的輸出：

01-14 16:58:36.699: W/dalvikvm(11938): Unable to resolve superclass of Lnet/sf/json/JSONException; (1034) 

01-14 16:58:36.707: W/dalvikvm(11938): Link of class 'Lnet/sf/json/JSONException;' failed 

01-14 16:58:36.707: W/dalvikvm(11938): VFY: unable to resolve exception class 813 (Lnet/sf/json/JSONException;) 

01-14 16:58:36.707: W/dalvikvm(11938): VFY: unable to find exception handler at addr 0x2e 

01-14 16:58:36.707: W/dalvikvm(11938): VFY: rejected Lnet/sf/json/JSONSerializer;.toJSON (Ljava/lang/Object;Lnet/sf/json/JsonConfig;)Lnet/sf/json/JSON; 

01-14 16:58:36.707: W/dalvikvm(11938): VFY: rejecting opcode 0x0d at 0x002e 

01-14 16:58:36.707: W/dalvikvm(11938): VFY: rejected Lnet/sf/json/JSONSerializer;.toJSON (Ljava/lang/Object;Lnet/sf/json/JsonConfig;)Lnet/sf/json/JSON; 

01-14 16:58:36.707: W/dalvikvm(11938): Verifier rejected class Lnet/sf/json/JSONSerializer; 

01-14 16:58:36.707: W/dalvikvm(11938): threadid=11: thread exiting with uncaught exception (group=0x41b28930) 

01-14 16:58:36.707: E/AndroidRuntime(11938): FATAL EXCEPTION: AsyncTask #1 

01-14 16:58:36.707: E/AndroidRuntime(11938): java.lang.RuntimeException: An error occured while executing doInBackground() 

01-14 16:58:36.707: E/AndroidRuntime(11938): at android.os.AsyncTask$3.done(AsyncTask.java:299) 

01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352) 

01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.FutureTask.setException(FutureTask.java:219) 

01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.FutureTask.run(FutureTask.java:239) 

01-14 16:58:36.707: E/AndroidRuntime(11938): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 

01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080) 

01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573) 

01-14 16:58:36.707: E/AndroidRuntime(11938): at java.lang.Thread.run(Thread.java:856) 

01-14 16:58:36.707: E/AndroidRuntime(11938): Caused by: java.lang.VerifyError: net/sf/json/JSONSerializer 

01-14 16:58:36.707: E/AndroidRuntime(11938): at com.aer.illbehonest.VideoPlay$ShowTitlesTask.doInBackground(VideoPlay.java:63) 

01-14 16:58:36.707: E/AndroidRuntime(11938): at com.aer.illbehonest.VideoPlay$ShowTitlesTask.doInBackground(VideoPlay.java:1) 
01-14 16:58:36.707: E/AndroidRuntime(11938): at android.os.AsyncTask$2.call(AsyncTask.java:287) 

01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.FutureTask.run(FutureTask.java:234) 

01-14 16:58:36.707: E/AndroidRuntime(11938): ... 4 more

來源

2013-01-14 Zac Canoy

有現有的回答你的問題就在這裏http://stackoverflow.com/questions/6280551/android-runtime-verify-error – Bostone

@Bostone我改變了庫，但它仍然強制關閉。我將用新的LogCat輸出更新我的問題。 –

@Bostone實際上，由於JSONSerializer，輸出大致相同，但它不在org.json中......我該怎麼做？ –

你有一個JSONException，但您還沒有任何JSONException處理程序。

，是的，Android有它自己的JSON庫，雖然GSON自帶，如果你需要存儲對象有很多按鍵，節省編碼時間的很多很好便利串行

來源

2013-01-14 22:21:50 CQM

的AsyncTask的Android強制關閉應用程序

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