EHXM

[도:트]'s Dev Log

안드로이드용 영어 어학기 Smart LC

스마트LC 소개 링크:
http://blog.ehxm.net/123

티스토어 링크:
http://bit.ly/awW3XW

[안드로이드 샘플코드] ViewSwitcher

Posted by EHXM. Posted in " 안드로이드/Tech Note "2010/06/08 22:16

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
		}
	}
}

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