Thread mit nicht abgefangener Ausnahme beenden, AyncTask # 2 Schwerwiegender Fehler

Question

Ich versuche, eine RSS News Reader-App zu erstellen, und ich verwende AsyncTask, um Threads zum Hinzufügen neuer Websites zu einer RSS-Feedliste zu verwenden. Aber wenn ich die neue URL eingebe und "HINZUFÜGEN" drücke, stürzt die App ab. Die LogCat sagt -

ThreadID 12: Gewinde mit abgefangene Ausnahme Verlassen“, "AsyncTask # 2 FATAL AUSNAHME" und java.lang.RuntimeException: Fehler beim doInBackground Ausführung()

Bitte um Hilfe! (PS I ADT verwenden.)

package com.rssnews; 

import android.app.Activity; 
import android.app.ProgressDialog; 
import android.content.Intent; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 
import java.lang.Exception; 

public class AddNewFeed extends Activity { 
Button btnSubmit; 
Button btnCancel; 
EditText txtUrl; 
TextView textViewMessage; 

RSSParser rssParser = new RSSParser(); 
RSSFeed rssFeed; 

private ProgressDialog pDialog; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.addnewfeed); 

    btnSubmit = (Button) findViewById(R.id.btnSubmit); 
    btnCancel = (Button) findViewById(R.id.btnCancel); 
    txtUrl = (EditText) findViewById(R.id.txtUrl); 
    textViewMessage = (TextView) findViewById(R.id.textViewMessage); 

    btnSubmit.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      try{ 
      String url = txtUrl.getText().toString(); 
      Log.d("URL Length", "" + url.length()); 
      if (url.length() > 0) { 
       textViewMessage.setText(""); 
       String urlPattern = "^http(s{0,1})://[a-zA-Z0-9_/\\-\\.]+\\.([A-Za-z/]{2,5})[a-zA-Z0-9_/\\&\\?\\=\\-\\.\\~\\%]*"; 
       if (url.matches(urlPattern)) { 
        new loadRSSFeed().execute(url); 
       } else { 
        textViewMessage.setText("Please enter a valid url"); 
       } 
      } else { 
       textViewMessage.setText("Please enter website url"); 
      }} 
      catch(Exception e){ 
       finish(); 
      } 
     } 
    }); 

    btnCancel.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      finish(); 
     } 
    }); 
} 

/** 
* Background Async Task to get RSS data from URL 
* */ 
class loadRSSFeed extends AsyncTask<String, String, String> { 

    /** 
    * Before starting background thread Show Progress Dialog 
    * */ 
    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     pDialog = new ProgressDialog(AddNewFeed.this); 
     pDialog.setMessage("Fetching RSS Information ..."); 
     pDialog.setIndeterminate(false); 
     pDialog.setCancelable(false); 
     pDialog.show(); 

    } 

    /** 
    * getting 
    * */ 
    @Override 
    protected String doInBackground(String... args) { 
     String url = args[0]; 
     rssFeed = rssParser.getRSSFeed(url); 
     Log.d("rssFeed", " " + rssFeed); 
     if (rssFeed != null) { 
      Log.e("RSS URL", 
        rssFeed.getTitle() + "" + rssFeed.getLink() + "" 
          + rssFeed.getDescription() + "" 
          + rssFeed.getLanguage()); 
      RSSDatabaseHandler rssDb = new RSSDatabaseHandler(
        getApplicationContext()); 
      WebSite site = new WebSite(rssFeed.getTitle(), 
        rssFeed.getLink(), rssFeed.getRSSLink(), 
        rssFeed.getDescription()); 
      rssDb.addSite(site); 
      Intent i = new Intent(getApplicationContext(), 
        RSSNewsReaderPBActivity.class); 
      // send result code 100 to notify about product update 
      setResult(100, i); 
      startActivity(i); 
      return null; 
     } else { 
      runOnUiThread(new Runnable() { 
       public void run() { 
        textViewMessage 
          .setText("Rss url not found. Please check the url or try again"); 
       } 
      }); 
     } 
     return null; 
    } 

    /** 
    * After completing background task Dismiss the progress dialog 
    * **/ 
    protected void onPostExecute(String args) { 
     pDialog.dismiss(); 
     runOnUiThread(new Runnable() { 
      public void run() { 
       if (rssFeed != null) { 
       } 
      } 
     }); 
    } 
} 

@Override 
protected void onPause() { 
    super.onPause(); 
    //pDialog.dismiss(); 
    finish(); 
} 

@Override 
public void onBackPressed() { 
    finish(); 
} 

}

04-10 13:28:50.250: W/dalvikvm(1853): threadid=12: thread exiting with uncaught exception (group=0xb1a1bb90) 
04-10 13:28:50.350: E/AndroidRuntime(1853): FATAL EXCEPTION: AsyncTask #2 
04-10 13:28:50.350: E/AndroidRuntime(1853): Process: com.rssnews, PID: 1853 
04-10 13:28:50.350: E/AndroidRuntime(1853): java.lang.RuntimeException: An error occured while executing doInBackground() 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at android.os.AsyncTask$3.done(AsyncTask.java:300) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at java.util.concurrent.FutureTask.setException(FutureTask.java:222) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at java.util.concurrent.FutureTask.run(FutureTask.java:242) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at java.lang.Thread.run(Thread.java:841) 
04-10 13:28:50.350: E/AndroidRuntime(1853): Caused by: java.lang.NoClassDefFoundError: org.jsoup.Jsoup 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at com.rssnews.RSSParser.getRSSLinkFromURL(RSSParser.java:129) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at com.rssnews.RSSParser.getRSSFeed(RSSParser.java:52) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at com.rssnews.AddNewFeed$loadRSSFeed.doInBackground(AddNewFeed.java:90) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at com.rssnews.AddNewFeed$loadRSSFeed.doInBackground(AddNewFeed.java:1) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at android.os.AsyncTask$2.call(AsyncTask.java:288) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
04-10 13:28:50.350: E/AndroidRuntime(1853):  ... 3 more 
04-10 13:28:50.700: I/Choreographer(1853): Skipped 38 frames! The application may be doing too much work on its main thread. 
04-10 13:28:51.880: I/Choreographer(1853): Skipped 95 frames! The application may be doing too much work on its main thread. 
04-10 13:28:55.320: I/Choreographer(1853): Skipped 49 frames! The application may be doing too much work on its main thread. 
04-10 13:28:56.280: I/Choreographer(1853): Skipped 96 frames! The application may be doing too much work on its main thread. 
04-10 13:28:57.920: E/WindowManager(1853): android.view.WindowLeaked: Activity com.rssnews.AddNewFeed has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{b2524248 V.E..... R.....I. 0,0-563,230} that was originally added here 
04-10 13:28:57.920: E/WindowManager(1853): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:346) 
04-10 13:28:57.920: E/WindowManager(1853): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:248) 
04-10 13:28:57.920: E/WindowManager(1853): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69) 
04-10 13:28:57.920: E/WindowManager(1853): at android.app.Dialog.show(Dialog.java:286) 
04-10 13:28:57.920: E/WindowManager(1853): at com.rssnews.AddNewFeed$loadRSSFeed.onPreExecute(AddNewFeed.java:80) 
04-10 13:28:57.920: E/WindowManager(1853): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587) 
04-10 13:28:57.920: E/WindowManager(1853): at android.os.AsyncTask.execute(AsyncTask.java:535) 
04-10 13:28:57.920: E/WindowManager(1853): at com.rssnews.AddNewFeed$1.onClick(AddNewFeed.java:45) 
04-10 13:28:57.920: E/WindowManager(1853): at android.view.View.performClick(View.java:4424) 
04-10 13:28:57.920: E/WindowManager(1853): at android.view.View$PerformClick.run(View.java:18383) 
04-10 13:28:57.920: E/WindowManager(1853): at android.os.Handler.handleCallback(Handler.java:733) 
04-10 13:28:57.920: E/WindowManager(1853): at android.os.Handler.dispatchMessage(Handler.java:95) 
04-10 13:28:57.920: E/WindowManager(1853): at android.os.Looper.loop(Looper.java:137) 
04-10 13:28:57.920: E/WindowManager(1853): at android.app.ActivityThread.main(ActivityThread.java:4998) 
04-10 13:28:57.920: E/WindowManager(1853): at java.lang.reflect.Method.invokeNative(Native Method) 
04-10 13:28:57.920: E/WindowManager(1853): at java.lang.reflect.Method.invoke(Method.java:515) 
04-10 13:28:57.920: E/WindowManager(1853): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777) 
04-10 13:28:57.920: E/WindowManager(1853): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593) 
04-10 13:28:57.920: E/WindowManager(1853): at dalvik.system.NativeStart.main(Native Method) 
04-10 13:28:57.980: I/Choreographer(1853): Skipped 62 frames! The application may be doing too much work on its main thread. 
04-10 13:29:00.400: I/Process(1853): Sending signal. PID: 1853 SIG: 9 

Answer 1

Sie versuchen, eine Aktivität aus dem Hintergrundthread zu starten (in doInBackground Methode), das ist der Grund, warum Ihre App abstürzt. Sie sollten diesen Code in onPostExecute hinzufügen.

protected void onPostExecute(String args) { 
    pDialog.dismiss(); 
    Intent i = new Intent(getApplicationContext(), RSSNewsReaderPBActivity.class); 
    setResult(100, i); 
    startActivity(i); 
}