ListView实现不同布局的显示

Posted 2020-09-18

ListView进行不同布局的显示，就需要重写5种方法，本文以两种布局为例

。

利用假数据进行模拟：

添加适配器

class MyBaseAdapter extends BaseAdapter{

    @Override
    public int getCount() {
        return mData.size()+mReshdata.size();
    }

    @Override
    public Object getItem(int i) {

        return null;

    }

    @Override
    public long getItemId(int i) {
        return 0;
    }

    /**
     *
     * @return返回两种类型布局
     */
    @Override
    public int getViewTypeCount() {
        return 2;
    }

    /**
     * 不同布局绘制状况
   //  * @param position
     * @return
     */
    @Override
    public int getItemViewType(int position) {
        Log.d("TAG","POSITO="+position+","+"getcount="+mData.size());

        if (position<mData.size()){
            return first;
        }else {
            return second;
        }

    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        Log.d("TAG","I="+i);
        int itemViewType = getItemViewType(i);
        Log.d("TAG","itemViewType="+itemViewType);
        ViewHolder holder = null;
        ViewHolderTwo holder_se = null;
        if (view == null){
            switch (itemViewType){
                case first:
                    holder = new ViewHolder();
                    view = View.inflate(getApplicationContext(), R.layout.item_lv, null);
                    holder.tv_data = (TextView) view.findViewById(R.id.tv_sj);
                    view.setTag(holder);
                    break;
                case second:
                    holder_se = new ViewHolderTwo();
                    view = View.inflate(getApplicationContext(), R.layout.item_second, null);
                    holder_se.tv_second = (TextView) view.findViewById(R.id.tv_second);
                    view.setTag(holder_se);
                    break;
                default:
                    break;
            }
        }else {
            switch (itemViewType){
                case first:
                    holder = (ViewHolder) view.getTag();
                    break;
                case second:
                    holder_se = (ViewHolderTwo) view.getTag();
                    break;
                default:
                    break;
            }
        }
        switch (itemViewType){
            case first:
                String s = mData.get(mData.size()-1);//mData.get(i)
                holder.tv_data.setText(s);
                break;
            case second:

                Log.d("TAG","i-mData.size()="+ (i-mData.size()));

                String second = mReshdata.get(i-mData.size());
                holder_se.tv_second.setText(second);
                break;
            default:
                break;
        }
        return view;
    }
}
class ViewHolder{
    TextView tv_data;

}
class  ViewHolderTwo{
    TextView tv_second;
}
进行不同布局的加载就实现了：

布局用的就是简单的TextView就不列出了。

同理实现多种类型，按照这样的逻辑都可以实现。