LayoutInflater 应用

public class iconlist extends ListActivity {
    
    private static class iconAdapter extends BaseAdapter {
        private LayoutInflater mInflater;
        private Bitmap mIcon1;
        private Bitmap mIcon2;
        
        private static final String[] DATA = {
            "Jacob", "Emily", "Michael", "Isabella", 
            "Ethan", "Emma", "Joshua", "Ava",
            "Daniel", "Sophia", "Matthew", "Elizabeth"};
      
        public iconAdapter(Context context) {
            mInflater = LayoutInflater.from(context);
            mIcon1 = BitmapFactory.decodeResource(context.getResources(), 
                     android.R.drawable.sym_action_call);
            mIcon2 = BitmapFactory.decodeResource(context.getResources(), 
                     android.R.drawable.sym_call_incoming);
        }

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

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

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

        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder;

            if (convertView == null) {
                convertView = mInflater.inflate(R.layout.main, null);

                holder = new ViewHolder();
                holder.text = (TextView) convertView.findViewById(R.id.text);
                holder.icon = (ImageView) convertView.findViewById(R.id.icon);

                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }

            holder.text.setText(DATA[position]);
            holder.icon.setImageBitmap((position & 1) == 1 ? mIcon1 : mIcon2);

            return convertView;
        }

        static class ViewHolder {
            TextView text;
            ImageView icon;
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setListAdapter(new iconAdapter(this));
    }
}