android 面试之listview

public View getView(int position, View convertView, ViewGroup parent) {
View item = mInflater.inflate(R.layout.list_item_icon_text, null);
((TextView) item.findViewById(R.id.text)).setText(DATA[position]);
((ImageView) item.findViewById(R.id.icon)).setImageBitmap(
(position & 1) == 1 ? mIcon1 : mIcon2);
return item;
}

public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item, null);
}
((TextView) convertView.findViewById(R.id.text)).setText(DATA[position]);
((ImageView) convertView.findViewById(R.id.icon)).setImageBitmap(
(position & 1) == 1 ? mIcon1 : mIcon2);
return convertView;
}

public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_item_icon_text, 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;
}

listView.setOnScrollListener(new OnScrollListener() {

 @Override
public void onScrollStateChanged(AbsListView listView,
int scrollState) { //停止加载图片
if (scrollState ==
AbsListView.OnScrollListener.SCROLL_STATE_FLING) {
imageLoader.stopProcessingQueue();
} else { //开始加载图片
imageLoader.startProcessingQueue();
}
} @Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { 

// TODO Auto-generated method stub
}
});

<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:divider="@color/list_background_color"
android:dividerHeight="0dp"
android:listSelector="#00000000"
android:scrollingCache="false"
android:animationCache="false"
android:smoothScrollbar="true" />