Gallery 的 Demo(4)

        mSwitcher.setFactory(this); 
        mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, 
                android.R.anim.fade_in)); 
        mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, 
                android.R.anim.fade_out)); 
 
        Gallery gallery = (Gallery) findViewById(R.id.gallery); 
        gallery.setAdapter(new ImageAdapter(this)); 
        gallery.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
            @Override 
            public void onItemSelected(AdapterView<?> parent, View v, 
                    int position, long id) { 
                mSwitcher.setImageResource(mImageIds[position]); 
            } 
 
            @Override 
            public void onNothingSelected(AdapterView<?> arg0) { 
 
            } 
        }); 
    } 
 
    public class ImageAdapter extends BaseAdapter { 
 
        private Context mContext; 
 
        public ImageAdapter(Context context) { 
            mContext = context; 
        } 
 
        public int getCount() { 
            return mThumbIds.length; 
        } 
 
        public Object getItem(int position) { 
            return position; 
        } 
 
        public long getItemId(int position) { 
            return position;