ListView的item加載幾種不同佈局

一個ListView的item當數據不同時，要使用不同的佈局，代碼如下：

（1）先自定義一個Adapter適配器，裏面多加幾個方法

public class XListViewAdapter extends BaseAdapter{
        private ArrayList<TouTiaoBean> mArrayListBean = new ArrayList<TouTiaoBean>();
        private LayoutInflater layoutInflater;

        public XListViewAdapter(Context context){
            layoutInflater = LayoutInflater.from(context);
        }

        public void setData(ArrayList<TouTiaoBean> arrayListBean){
            mArrayListBean = arrayListBean;
            notifyDataSetChanged();
        }

        @Override
        public int getCount() {
            return mArrayListBean.size();
        }

        @Override
        public Object getItem(int position) {
            return mArrayListBean.get(position);
        }

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

        /**
         * 根據數據的不同劃分類型
         * @param position
         * @return
         */
        @Override
        public int getItemViewType(int position) {
            if (mArrayListBean.get(position).getImgextraArrayList() != null) {
                return 0;
            }else if (mArrayListBean.get(position).getEditor() != null) {
                return 1;
            }else{
                return 2;
            }
        }

        /**
         * 確定返回類型的個數，對應下面getView()方法裏要使用幾個ViewItem類
         * @return
         */
        @Override
        public int getViewTypeCount() {
            return 3;
        }

        /**
         * 根據不同類型，返回不同佈局
         * @param position
         * @param convertView
         * @param parent
         * @return
         */
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

            if (getItemViewType(position) == 0) {
                return getViewImg(position, convertView, parent);
            }else if (getItemViewType(position) == 1) {
                return null;//這裏不能返回空，不然會報空指針，而且不會報哪個位置空指針
            }else if(getItemViewType(position) == 2){
                return getViewNormal(position, convertView, parent);
            }else{
                return null;//這裏不能返回空，不然會報空指針，而且不會報哪個位置空指針
            }
        }

        /**
         * 返回的其中一種佈局方法
         * @param position
         * @param convertView
         * @param parent
         * @return
         */
        public View getViewNormal(int position, View convertView, ViewGroup parent){
            View v;
            ViewItemNormal viewItemNormal;
            if (convertView == null){
                viewItemNormal = new ViewItemNormal();
                v = layoutInflater.inflate(R.layout.toutiao_xlistview_item_normal_layout,null);
                viewItemNormal.titleImg = (ImageView) v.findViewById(R.id.toutiao_xlistview_item_normal_titleimg);
                viewItemNormal.titleTxt = (TextView) v.findViewById(R.id.toutiao_xlistview_item_normal_title_txt);
                viewItemNormal.contentTxt = (TextView) v.findViewById(R.id.toutiao_xlistview_tiem_normal_content_txt);
                v.setTag(viewItemNormal);
            }
            else{
                v = convertView;
                viewItemNormal = (ViewItemNormal) v.getTag();
            }
            TouTiaoBean touTiaoBean = (TouTiaoBean) getItem(position);
            Picasso.with(getActivity()).load(touTiaoBean.getImgsrc()).into(viewItemNormal.titleImg);
            viewItemNormal.titleTxt.setText(touTiaoBean.getTitle());
            viewItemNormal.contentTxt.setText(touTiaoBean.getDigest());
            return v;
        }

        /**
         * 返回的第二種佈局方法
         * @param position
         * @param convertView
         * @param parent
         * @return
         */
        public View getViewImg(int position, View convertView, ViewGroup parent){
            View v;
            ViewItemImg viewItemImg;
            if (convertView == null){
                viewItemImg = new ViewItemImg();
                v = layoutInflater.inflate(R.layout.toutiao_xlistview_item_img_layout,null);
                viewItemImg.aboveTxt = (TextView) v.findViewById(R.id.toutiao_xlistview_item_img_above_txt);
                viewItemImg.leftImg = (ImageView) v.findViewById(R.id.toutiao_xlistview_item_img_leftimg);
                viewItemImg.midImg = (ImageView) v.findViewById(R.id.toutiao_xlistview_item_img_midimg);
                viewItemImg.rightImg = (ImageView) v.findViewById(R.id.toutiao_xlistview_item_img_rightimg);
                v.setTag(viewItemImg);
            }
            else{
                v = convertView;
                viewItemImg = (ViewItemImg) v.getTag();
            }
            TouTiaoBean touTiaoBean = (TouTiaoBean) getItem(position);
            viewItemImg.aboveTxt.setText(touTiaoBean.getTitle());
            Picasso.with(getActivity()).load(touTiaoBean.getImgsrc()).into(viewItemImg.leftImg);
            Picasso.with(getActivity()).load(touTiaoBean.getImgextraArrayList().get(0)).into(viewItemImg.midImg);
            Picasso.with(getActivity()).load(touTiaoBean.getImgextraArrayList().get(1)).into(viewItemImg.rightImg);
            return v;
        }

        public class ViewItemNormal {
            ImageView titleImg;
            TextView titleTxt;
            TextView contentTxt;
        }

        public class ViewItemImg{
            TextView aboveTxt;
            ImageView leftImg;
            ImageView midImg;
            ImageView rightImg;
        }
    }