ViewSwitcher 예제 코드

public class ViewSwitcherExample extends ListActivity

 implements OnClickListener {

    

//sample list items

static final String[] ITEMS = new String[]

          { "List Item 1", "List Item 2", 

            "List Item 3", "List Item 4", 

            "List Item 5", "List Item 6", 

            "List Item 7", "List Item 8", 

            "List Item 9", "List Item 10" };

//the ViewSwitcher

private ViewSwitcher switcher;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  

  //no window title

  requestWindowFeature(Window.FEATURE_NO_TITLE);

  

  //create the ViewSwitcher in the current context

  switcher = new ViewSwitcher(this);

  

  //footer Button: see XML1

  Button footer = (Button)View.inflate(this, R.layout.btn_loadmore, null);

  

  //progress View: see XML2

  View progress = View.inflate(this, R.layout.loading_footer, null);

  

  //add the views (first added will show first)

  switcher.addView(footer);

  switcher.addView(progress);

  

  //add the ViewSwitcher to the footer

  getListView().addFooterView(switcher);

  

  //add items to the ListView

  setListAdapter(new ArrayAdapter(this,

          android.R.layout.simple_list_item_1, ITEMS));

}

@Override /* Load More Button Was Clicked */

public void onClick(View arg0) {

//first view is showing, show the second progress view

switcher.showNext();

//and start background work

new getMoreItems().execute();

}

/** Background Task To Get More Items**/

private class getMoreItems extends AsyncTask {

@Override

protected Object doInBackground(Void… params) {

//code to add more items

//...

try {

Thread.sleep(3000); //only to demonstrate

} catch (InterruptedException e) {

e.printStackTrace();

}

return null;

}

@Override /* Background Task is Done */

protected void onPostExecute(Object result) {

//go back to the first view

switcher.showPrevious();

                        //update the ListView

}

}

}