多佈局的自定義Adapter

//在開發過程中，多佈局顯示item是非常重要的，下面的程式碼是自定義的adapter顯示垂直和水平佈局下的item

public class MyAdapter extends BaseAdapter {
    private final List<AnimaDec.ResultBean.BookListBean> list;
    private final Context context;
//兩種佈局
 private int typeTotal=2;
//水平佈局的索引
 private final int atype=0;
//垂直佈局的索引
 private final int btype=1;

    public MyAdapter(Context context, List<AnimaDec.ResultBean.BookListBean> list) {
        this.context=context;
        this.list=list;
    }
    public void addlist(List<AnimaDec.ResultBean.BookListBean> list2){
        list.addAll(list2);
    }
//list數量
    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int i) {
        return list.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }
//佈局型別
    @Override
    public int getItemViewType(int position) {
        AnimaDec.ResultBean.BookListBean bookListBean = list.get(position);
        String type = bookListBean.getArea();
        if(type.equals("國漫"))
        {
            return atype;
        }
        else
        {
            return btype;
        }

    }
//佈局總數
    @Override
    public int getViewTypeCount() {
        return typeTotal;
    }
//自定義佈局getView
    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
//優化自定義佈局
 ViewHolder1 vh1=null;
        ViewHolder2 vh2=null;
//獲得佈局型別總數
 int type = getItemViewType(i);
        if(view==null) {
            switch (type) {
                case atype:
                    vh1 = new ViewHolder1();
                    view = View.inflate(context, R.layout.horizontal_item, null);
                    vh1.tv_title = view.findViewById(R.id.tv_title);
                    vh1.tv_kind = view.findViewById(R.id.tv_king);
                    vh1.iv_horizontal = view.findViewById(R.id.iv_horizontal);
                    view.setTag(vh1);
                    break;
                case btype:
                    vh2 = new ViewHolder2();
                    view = View.inflate(context, R.layout.vertical_item, null);
                    vh2.tv_title2 = view.findViewById(R.id.tv_title2);
                    vh2.tv_kind2 = view.findViewById(R.id.tv_king2);
                    vh2.iv_vertical = view.findViewById(R.id.iv_vertical);
                    view.setTag(vh2);
                    break;
            }
        }
        else
        {
            switch (type){
                case atype:
vh1= (ViewHolder1) view.getTag();
                    break;
                case btype:
                    vh2= (ViewHolder2) view.getTag();
                    break;

            }
        }
        //獲得當前物件
        AnimaDec.ResultBean.BookListBean listBean = list.get(i);
        switch (type){
            case atype:
//修改文字內容
 vh1.tv_title.setText(listBean.getName());
                vh1.tv_kind.setText(listBean.getArea());
//使用ImageLoader載入佈局（ImageLoader看文章列表有介紹）
 ImageLoader.getInstance().displayImage(listBean.getCoverImg(),vh1.iv_horizontal);
                break;
            case btype:
                vh2.tv_title2.setText(listBean.getName());
                vh2.tv_kind2.setText(listBean.getArea());
                ImageLoader.getInstance().displayImage(listBean.getCoverImg(),vh2.iv_vertical);
                break;

        }

        return view;
    }
//優化類
 class ViewHolder1{
        TextView tv_title;
        TextView tv_kind;
        ImageView iv_horizontal;
    }
    class ViewHolder2{
        TextView tv_title2;
        TextView tv_kind2;
        ImageView iv_vertical;
    }
}
//自定義佈局需要注意：有幾種佈局就需要幾個優化類。