Erstellen Sie Android-TextSwitcher mit einer dynamisch erzeugten Textview

Bekam ich das folgende Beispiel in der API-demos
aus dem folgenden Pfad

C:\Program Files\Android\android-sdk-windows\samples\android-10\ApiDemos\res\layout

und

C:\Program Files\Android\android-sdk-windows\samples\android-10\ApiDemos\src\com\example\android\apis\view

TextSwitcher1.java

public class TextSwitcher1 extends Activity implements
   ViewSwitcher.ViewFactory, View.OnClickListener {

   private TextSwitcher mSwitcher;

   private int mCounter = 0;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);

       setContentView(R.layout.text_switcher_1);

       mSwitcher = (TextSwitcher) findViewById(R.id.switcher);
       mSwitcher.setFactory(this);

       Animation in = AnimationUtils.loadAnimation(this,
               android.R.anim.fade_in);
       Animation out = AnimationUtils.loadAnimation(this,
               android.R.anim.fade_out);
       mSwitcher.setInAnimation(in);
       mSwitcher.setOutAnimation(out);

       Button nextButton = (Button) findViewById(R.id.next);
       nextButton.setOnClickListener(this);

       updateCounter();
   }

   public void onClick(View v) {
       mCounter++;
       updateCounter();
   }

   private void updateCounter() {
       mSwitcher.setText(String.valueOf(mCounter));
   }

   public View makeView() {
       TextView t = new TextView(this);
       t.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL);
       t.setTextSize(36);
       return t;
   }

}

TextSwitcher_1.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2007 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button android:id="@+id/next"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/text_switcher_1_next_text" />

    <TextSwitcher android:id="@+id/switcher"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>