的AsyncTask運行時錯誤異常

我的Android應用程序停止working.Here是我的AsyncTask類代碼的AsyncTask運行時錯誤異常

package com.example.hay; 

import java.io.IOException; 

import org.jsoup.Jsoup; 
import org.jsoup.nodes.Document; 

import android.content.Context; 
import android.os.AsyncTask; 
import android.widget.EditText; 

public class AsyncLoadData extends AsyncTask<String, Void, String> { 
private Context mContext; 
private ILoadDataListener mListener; 

public AsyncLoadData(Context context, ILoadDataListener listener) { 
    this.mContext = context; 
    this.mListener = listener; 
} 

@Override 
protected String doInBackground(String... params) { 
    try { 
    String url = params[0]; 
    Document doc; 
    doc = Jsoup.connect(url).get(); 
    String title = doc.text(); 
    return title; 
} catch (IOException e) { 
    // TODO Auto-generated catch block 
    e.printStackTrace(); 
    return null; 
} 
} 

@Override 
protected void onPostExecute(String result) { 
    mListener.complete(result); 
} 

@Override 
protected void onPreExecute() { 
    mListener.loading(); 
} 

public interface ILoadDataListener { 
    void loading(); 

    void complete(String result); 
} 
}

這似乎是有毛病我在後臺method.Logcat待辦事項（我不知道如何發佈logcat的日誌，以便我將只貼吧）：

01-25 20:38:52.449: E/AndroidRuntime(878): FATAL EXCEPTION: AsyncTask #1 
01-25 20:38:52.449: E/AndroidRuntime(878): java.lang.RuntimeException: An error occured while executing doInBackground() 
01-25 20:38:52.449: E/AndroidRuntime(878): at android.os.AsyncTask$3.done(AsyncTask.java:299) 
01-25 20:38:52.449: E/AndroidRuntime(878): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 
01-25 20:38:52.449: E/AndroidRuntime(878): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 
01-25 20:38:52.449: E/AndroidRuntime(878): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 
01-25 20:38:52.449: E/AndroidRuntime(878): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 
01-25 20:38:52.449: E/AndroidRuntime(878): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 
01-25 20:38:52.449: E/AndroidRuntime(878): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 
01-25 20:38:52.449: E/AndroidRuntime(878): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 
01-25 20:38:52.449: E/AndroidRuntime(878): at java.lang.Thread.run(Thread.java:856) 
01-25 20:38:52.449: E/AndroidRuntime(878): Caused by: java.lang.NoClassDefFoundError: org.jsoup.Jsoup 
01-25 20:38:52.449: E/AndroidRuntime(878): at com.example.hay.AsyncLoadData.doInBackground(AsyncLoadData.java:26) 
01-25 20:38:52.449: E/AndroidRuntime(878): at com.example.hay.AsyncLoadData.doInBackground(AsyncLoadData.java:1) 
01-25 20:38:52.449: E/AndroidRuntime(878): at android.os.AsyncTask$2.call(AsyncTask.java:287) 
01-25 20:38:52.449: E/AndroidRuntime(878): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 
01-25 20:38:52.449: E/AndroidRuntime(878): ... 5 more

謝謝你們歡呼

來源

2014-01-25 John Smith