RuntimeException: 您的内容必须有一个 ListView，其 id 属性为‘ android.R.id.list’

我得到一个运行时异常

例外: 您的内容必须有一个 ListView，其 id 为属性是‘ android.R.id.list’

我不知道怎么了。

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.newslist);
mDbHelper.open();
fillData();
}


private void fillData() {
Bundle extras = getIntent().getExtras();
long catID = extras.getLong("cat_id");
Cursor c = mDbHelper.fetchNews(catID);
startManagingCursor(c);


String[] from = new String[] { DBHelper.KEY_TITLE };
int[] to = new int[] { R.id.newslist_text };


SimpleCursorAdapter notes = new SimpleCursorAdapter(this, R.layout.text_newslist, c, from, to);
setListAdapter(notes);
}

Xml

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

Text _ newslist. xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:text="@+id/newslist_text"
android:id="@+id/newslist_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</TextView>
</LinearLayout>

93875

小开

Remove the call to setContentView - you don't need it in a ListActivity unless you're doing something radical. The code should work without it.

小开

I had a similar issue with the error message you received, and I found it was because I was extending ListActivity instead of just Activity (that's what I get for re-purposing code from a different project ;) )

小开

<ListView android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>

This will solve the error if you still want to use a ListActivity.

小开

I also faced this issue, I was extending my activity class from listactivity, but the id of my list view was not defualt I changed it back to list and now its working fine. Asim soroya

小开

Another way is, don't extend ListActivity. Just extends Activity, then you can create your list view by setContentView() and get the list view by findViewById(R.id.yourlistview).

If you extends from ListActivity, then don't use setContentView(). You need get the default list view hosted in list activity by getListView().

小开

<ListView android:id="@id/android:list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:drawSelectorOnTop="false"
android:scrollbars="vertical"/>

小开

I face like this too. In my case (Maybe not relevant with your case, just share to others) in class mainActivity.java yourClassName extends ListActivity(){...} change to yourClassName extends Activity(){...}