类扩展ListActivity＆QUOT;其ID属性为“android.R.id.list'＆QUOT;

我想延长我的主要活动为ListActivity（previously延伸至：活动）使用onListItemClick，但logcat的，给我你的内容必须具备的一个ListView其id属性为机器人.r.id.list'。 （我使用SQLite，让填充ListView控件）。

I'm trying to extend my main Activity to "ListActivity" (previously extends to: Activity) to use onListItemClick, but the logcat, send me "Your content must-have a ListView whose id attribute is 'android.r.id.list'". (i'm using SQLite for populate the ListView).

MI XML是：

<ListView
    android:id="@+id/list" // to "@id/android:list" or other styles (but nothing works)
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"/> // or closing with </ListView>

这是为ListView完整的XML：

this is the complete xml for the ListView:

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

我主要的类来处理的ListView：

My main class to handle the ListView:

public class lay_main extends ListActivity{
public ListView list;
private DBHelper myAdap;


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.lay_main);

    collectXML();
    setupDataBase();
    setupAdapter();

}      
private void collectXML() 
{
    list = (ListView)findViewById(R.id.list);
}

private void setupDataBase() {
    myAdap = new DBHelper(getApplicationContext(), "courses", null, 1);
    myAdap.insertCourses();

}

private void setupAdapter()
{
if(myAdap.getCourses()!=null)
    {
    cAdapter adapter = new  cAdapter(this, R.layout.list_courses, myAdap.getCourses());
    list.setAdapter(adapter);
    }

}}

我读Android:您的内容必须有一个ListView的id属性是android.R.id.list ，或者：runtime例外的ListView的id属性是'android.R.id.list和其他问题，但不要对我的作品，这是怎么回事呢？

I read Android: Your content must have a ListView whose id attribute is android.R.id.list, or: runtime exception ListView whose id attribute is 'android.R.id.list', and other questions, but don't works for me, what's going on here?

真的希望AP preciate你的帮助

really would appreciate your help