的NullPointerException在JdwpPaquet

我試圖運行下面的Android應用程序，但我得到一個NullPointerException的NullPointerException在JdwpPaquet

Main.java

import android.app.ListActivity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.ArrayAdapter; 
import android.widget.ListView; 

public class Main extends ListActivity { 
String[] listActivityNames = 
    {"Text1", "Text2", "Text3", "Text4"}; 

    /** Called when the activity is first created. */ 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

     // Use an existing ListAdapter that will map an array 
     // of strings to TextViews 

     setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, listActivityNames)); 
     getListView().setTextFilterEnabled(true); 
} 

/*protected void onListItemClick(ListView l, View v, int position, long id) { 
    Intent myIntent = new Intent(); 
    myIntent.setClassName("com.utsc", "com.utsc.Announcements"); 
    startActivity(myIntent); 
}*/ 
}

控制檯：

[2011-01-26 13:58:57 - ddms]null 
java.lang.NullPointerException 
at com.android.ddmlib.JdwpPacket.writeAndConsume(JdwpPacket.java:213) 
at com.android.ddmlib.Client.sendAndConsume(Client.java:573) 
at com.android.ddmlib.HandleHello.sendHELO(HandleHello.java:142) 
at com.android.ddmlib.HandleHello.sendHelloCommands(HandleHello.java:65) 
at com.android.ddmlib.Client.getJdwpPacket(Client.java:670) 
at com.android.ddmlib.MonitorThread.processClientActivity(MonitorThread.java:317) 
at com.android.ddmlib.MonitorThread.run(MonitorThread.java:263) 

[2011-01-26 13:58:57 - ddms]null 
java.lang.NullPointerException 
at com.android.ddmlib.JdwpPacket.writeAndConsume(JdwpPacket.java:213) 
at com.android.ddmlib.Client.sendAndConsume(Client.java:573) 
at com.android.ddmlib.HandleHello.sendHELO(HandleHello.java:142) 
at com.android.ddmlib.HandleHello.sendHelloCommands(HandleHello.java:65) 
at com.android.ddmlib.Client.getJdwpPacket(Client.java:670) 
at com.android.ddmlib.MonitorThread.processClientActivity(MonitorThread.java:317) 
at com.android.ddmlib.MonitorThread.run(MonitorThread.java:263)

來源

2011-01-26 Silviu

發生了我也是，你過去了嗎？ – 2011-05-08 02:34:19

我試圖運行你的應用程序和它似乎運行良好。這裏是我的測試：

package com.stackoverflow.testlistactivity; 

import android.app.ListActivity; 
import android.os.Bundle; 
import android.widget.ArrayAdapter; 


public class TestListActivity extends ListActivity { 
    String[] listActivityNames = { 
     "Text1", "Text2", "Text3", "Text4" 
    }; 

    /** Called when the activity is first created. */ 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     // Use an existing ListAdapter that will map an array 
     // of strings to TextViews 

     setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, 
       listActivityNames)); 
     getListView().setTextFilterEnabled(true); 
    } 
}

來源

2011-01-26 19:40:38 Noel