Android 控件之ImageSwitcher图片切换器(2)

public class ImageSwitcherDemo extends Activity implements
  OnItemSelectedListener, ViewFactory {
 private ImageSwitcher is;
 private Gallery gallery;

 private Integer[] mThumbIds = { R.drawable.b, R.drawable.c,
   R.drawable.d, R.drawable.f, R.drawable.g,
   };

 private Integer[] mImageIds = { R.drawable.b, R.drawable.c,
   R.drawable.d, R.drawable.f, R.drawable.g, };

 /*
  * (non-Javadoc)
  *
  * @see android.app.Activity#onCreate(android.os.Bundle)
  */
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  requestWindowFeature(Window.FEATURE_NO_TITLE);
  setContentView(R.layout.imageswitcherpage);

  is = (ImageSwitcher) findViewById(R.id.switcher);
  is.setFactory(this);

  is.setInAnimation(AnimationUtils.loadAnimation(this,
    android.R.anim.fade_in));
  is.setOutAnimation(AnimationUtils.loadAnimation(this,
    android.R.anim.fade_out));

  gallery = (Gallery) findViewById(R.id.gallery);

  gallery.setAdapter(new ImageAdapter(this));
  gallery.setOnItemSelectedListener(this);
 }

 @Override
 public View makeView() {
  ImageView i = new ImageView(this);
  i.setBackgroundColor(0xFF000000);
  i.setScaleType(ImageView.ScaleType.FIT_CENTER);
  i.setLayoutParams(new ImageSwitcher.LayoutParams(
    LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
  return i;
 }

 public class ImageAdapter extends BaseAdapter {
  public ImageAdapter(Context c) {
   mContext = c;
  }

  public int getCount() {
   return mThumbIds.length;
  }

  public Object getItem(int position) {
   return position;
  }

  public long getItemId(int position) {
   return position;
  }

  public View getView(int position, View convertView, ViewGroup parent) {
   ImageView i = new ImageView(mContext);

   i.setImageResource(mThumbIds[position]);
   i.setAdjustViewBounds(true);
   i.setLayoutParams(new Gallery.LayoutParams(
     LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
   i.setBackgroundResource(R.drawable.e);
   return i;
  }

  private Context mContext;

 }

 @Override
 public void onItemSelected(AdapterView<?> parent, View view, int position,
   long id) {
  is.setImageResource(mImageIds[position]);

 }

 @Override
 public void onNothingSelected(AdapterView<?> parent) {
  // TODO Auto-generated method stub

 }

}