NOTE: attach of thread 'Binder Thread #3' 异常

NOTE: attach of thread 'Binder Thread #3' 错误
本人写了个ListView的测试程序，但最终结果显示不出来，用logcat提示：
  04-04 07:14:26.308: INFO/AndroidRuntime(337): NOTE: attach of thread 'Binder Thread #3' failed
  04-04 07:14:28.218: INFO/ActivityManager(60): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=gao.ListView/.ListViewTest }
  04-04 07:14:28.278: INFO/AndroidRuntime(345): NOTE: attach of thread 'Binder Thread #3' failed
 我写的代码如下：
  ListViewTest.java代码：
  （1）package gao.ListView;

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

import android.app.Activity;
import android.app.ListActivity;
import android.os.Bundle;
import android.widget.SimpleAdapter;

public class ListViewTest extends ListActivity {
   
  public void onCreate(Bundle savedInstanceState, String gao) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  ArrayList< HashMap<String,String>> list = new ArrayList< HashMap<String,String>>();
  HashMap<String,String> map1 = new HashMap<String, String>();
  HashMap<String,String> map2 = new HashMap<String,String>();
  HashMap<String,String> map3 = new HashMap<String,String>();
  map1.put("user_name", "gao");
  map1.put("user_ip","192.168.0.1");
  map2.put("user_name", "yang");
  map2.put("user_ip", "192.168.0.2");
  map3.put("user_name","li");
  map3.put("uaer-ip","192.168.0.3");
  list.add(map1);
  list.add(map2);
  list.add(map3);
  SimpleAdapter listAdapter=new SimpleAdapter(this, list, R.layout.user,
  new String[]{"user_name","user_ip"}, 
  new int[]{R.id.user_name,R.id.user_ip});
  setListAdapter(listAdapter);
  }

}

（2）main.xml代码：
  <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
  <ListView
  android:id="@+id/android:list"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:scrollbars="vertical"
  ></ListView>
</LinearLayout>

（3）user.xml的代码：
  <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="horizontal"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
  <TextView
  android:id="@+id/user_name"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:textSize="10pt"
  android:singleLine="true"
  ></TextView>
   
  <TextView
  android:id="@+id/user_ip"
  android:layout_width="wrap_content"