Problema ao criar Tab Layout

Mobile
#1

Estou tentando criar um tab layout, do próprio exemplo do android: http://developer.android.com/resources/tutorials/views/hello-tabwidget.html

public class AppDroidesp extends TabActivity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        TabHost tabHost = getTabHost();
        TabHost.TabSpec spec;
        Intent intent;
       
        intent = new Intent().setClass(this, Tab1.class);
        spec = tabHost.newTabSpec("tab1").setIndicator("Tab1").setContent(intent);
       
        tabHost.addTab(spec);
       
        tabHost.setCurrentTab(1);
    }
}
public class Tab1 extends Activity{
   
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
       
        TextView textView = new TextView(this);
        textView.setText("Tab1");
        setContentView(textView);
    }
   
}
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/tabhost"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
 
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:padding="5dp">
       
        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />
           
        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:padding="5dp" />
           
    </LinearLayout>

</TabHost>

Só que no emulador aparece esse erro:
The application Droidesp (process br.droidesp) has stopped unexpectedly. Please try again

Alguem sabe o que pode ser?

#2

Se estiver usando eclipse, utilize a perspectiva DDMS para ver o log do emulador, assim você saberá onde está dando erro.

#3