关于android textSwitcher

[hxpax]

	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.gallery);
		gallery = (Gallery) findViewById(R.id.gallery);
		imageAdapter = new ImageAdapter(this);
		gallery.setAdapter(imageAdapter);
		gallery.setOnItemSelectedListener(this);
		
		imageSwitcher = (ImageSwitcher) findViewById(R.id.imageswitcher);
		imageSwitcher.setFactory(this);	
		imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
				android.R.anim.fade_in));
		imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
				android.R.anim.fade_out));
		textSwitcher= (TextSwitcher)findViewById(R.id.textswitcher);
		textSwitcher.setFactory(this);//debug到这里的时候显示Source not found.
		textSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));
		textSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));
	}