Question

我在CustomAdapter类中成功实现了Rounded Corner ListView，如下所示：

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    // convert view = design
    View v = convertView;
    if (v == null) {
        viewHolder = new ViewHolder();
        v = layoutInflater.inflate(layout, null);
        viewHolder.textTitle = (TextView) v.findViewById(R.id.textTitle);

        if (position == 0 && arrayList.size() == 1) {
            v.setBackgroundResource(R.drawable.top_list_selector);
        }
        else if (position == 0) {
            v.setBackgroundResource(R.drawable.top_list_selector);
        }
        else if (position == arrayList.size() - 1) {
            v.setBackgroundResource(R.drawable.bottom_list_selector);
        } else {
            v.setBackgroundResource(R.drawable.mid_list_selector);
        }

        v.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder) v.getTag();
    }

但我不知道如何在下面的课程中实现相同的内容，我确实理解，我必须使用arrayList代替countryList但view和{{ 1}}？

position

Answer 1

在1代码示例中，用户创建了一个自定义适配器来显示项目的列表，如

MyCustomeAdapter extends BaseAdapter

在您的代码中，您只是显示已构建的适配器，它不支持Override getView()方法，可以在其中进行所有这些更改。

因此，为了完成示例所做的操作，请创建一个类

static class MyListAdapter extends BaseAdapter {    


        private List<View> views = new ArrayList<View>();

        public void addView(View view){
            views.add(view);
        }

        public int getCount() {
            return views.size();
        }

        public Object getItem(int position) {
            return views.get(position).getTag();
        }

        public long getItemId(int position) {
            return views.get(position).getId();
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            return views.get(position);
        }
    }

而不是做

ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(getActivity(),
                R.layout.adapter_social, countryList);

待办事项

MyListAdapter listAdapter = new MyListAdapter（）;

 LayoutInflater inflater = getLayoutInflater();  

        int item_layout = 0 ;

        for(int i = 0 ; i < values.length;i++) {

            //decide which layout to show depending on the item position
            if(i==0) {
                item_layout = R.layout.top_list_layout ;
            } else if(i==values.length-1) {
                item_layout = R.layout.bottom_list_layout;
            } else {
                item_layout = R.layout.mid_list_layout;
            }


            TextView button = (TextView)inflater.inflate(item_layout, null); 

            button.setText(values[i]);
            button.setTag(new Integer(i));

            listAdapter.addView(button);
        }




        //lv.setSelector(R.color.transparent);
        lv.setAdapter(listAdapter);

如何在列表中实现圆角效应

1 个答案: