Android ListView无数据项时提示

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ListView
        android:id="@+id/myList"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <!-- Here is the view to show if the list is emtpy -->

    <TextView
        android:id="@+id/myText"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:text="No items." />

</LinearLayout >

private ListView mListView = null;

mListView = (ListView) findViewById(R.id.myList);
mListView.setEmptyView(findViewById(R.id.myText));

ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, generateStrings());

mListView.setAdapter(adapter);