公共類ArrayAdapter時遇到麻煩延伸ArrayAdapter {自定義多種可選的ListView在Android中,滾動
private final List<String> list;
private final Activity context;
public ArrayAdapter_DiscountList(Activity context, List<Class_Model> list) {
super(context, R.layout.list, list);
this.context = context;
this.list = list;
}
static class ViewHolder {
protected TextView text;
protected ToggleButton toggle;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view = null;
if (convertView == null) {
LayoutInflater inflator = context.getLayoutInflater();
view = inflator.inflate(R.layout.list, null);
final ViewHolder viewHolder = new ViewHolder();
viewHolder.text = (TextView) view.findViewById(R.id.list_item_name);
viewHolder.toggle = (ToggleButton) view.findViewById(R.id.checkbox_toggle);
viewHolder.toggle.setVisibility(View.VISIBLE);
// TODO Auto-generated method stub
viewHolder.toggle.setOnCheckedChangeListener(
new CompoundButton.OnCheckedChangeListener()
{
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
String element = (String) viewHolder.toggle.getTag();
element.setSelected(buttonView.isChecked());
if(isChecked)
{
ArrFDItem.add(list.get(position).getName());
}else
{
ArrFDItem.remove(list.get(position).getName());
}
}
});
view.setTag(viewHolder);
viewHolder.toggle.setTag(list.get(position));
} else {
view = convertView;
((ViewHolder) view.getTag()).toggle.setTag(list.get(position));
}
ViewHolder holder = (ViewHolder) view.getTag();
holder.text.setText(list.get(position).getName());
holder.toggle.setChecked(list.get(position).isSelected());
return view;
}
}
工作正常,但scrollng列表視圖時,它的去除列表中的項目,以及與postion of list.get(position).getName();僅獲得0-5(一次只有6個列表項目在列表視圖中可見)。我必須在列表中選擇更多項目,並且必須根據列表中的切換選擇來添加/刪除。請幫忙。感謝你...
嗨,第一次感謝您的回覆。不知何故,我知道在滾動列表時回收convertview。但無法得到確切的解決方案。請看看問題,我已經退出了。 – Pankaj
嗨aaamos, 感謝您解釋清楚的答案,但我很抱歉,它不適合我。無論如何感謝您的關心,我會通讀您提供的文章。關於ClassModel,它被錯誤地改爲String。這與你解釋的一樣。 再次感謝你.... – Pankaj