Question

更新＃2 我有一个listView和一个适配器。 listView中的每个项目都有一个复选框。单击列表视图中的复选框时，下面的5-6项复选项（重复 - 所有复选框）也显示为按下 - 灯亮，即使没有人点击，然后检查是否实际按下了'isChecked'bool flag，这是假的。

public class watchAllAdapter扩展了ArrayAdapter {

public watchAllAdapter(Context context, ArrayList<Subject> arrayList) {
    super(context, 0, arrayList);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View listItemView = convertView;
    if (listItemView == null) {
        listItemView = LayoutInflater.from(getContext()).inflate(
                R.layout.for_each_watch_all, parent, false);
    }
    final Subject currSubject = getItem(position);

    final CheckBox cb = (CheckBox) listItemView.findViewById(R.id.checkbox_for_each);
    cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
            if (isChecked){
                currSubject.setChosen(true);
            }
            else{
                cb.setChecked(false);
                currSubject.setChosen(false);
            }
        }
    });

    return listItemView;
}

thanks =]

Answer 1

如果我是你，我建议你使用......

if(cb.isChecked()) {
    currSubject.setChosen(true);
}
else if (!cb.isChecked()) {
    currSubject.setChosen(false);
}

Answer 2

尝试遵循View Holder模式。创建一个Holder类，如果它不为null，则重用该视图。如果视图已经存在，也将onCheckedChangedListener（）设置为复选框。

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View listItemView = convertView;
    Holder holder = null;
    if (listItemView == null) {
        listItemView = LayoutInflater.from(getContext()).inflate(
                R.layout.for_each_watch_all, parent, false);
        holder = new Holder();

        holder.ckbox =(CheckBox)row.findViewById(R.id.check_box_id);

        listItemView .setTag(holder);
    }else {

        holder = (Holder) listItemView.getTag();
        holder.ckbox.setOnCheckedChangeListener(null);

    }
    final Subject currSubject = getItem(position);

    final CheckBox cb = (CheckBox) listItemView.findViewById(R.id.checkbox_for_each);
    cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
            if (isChecked){
                currSubject.setChosen(true);
            }
            else{
                cb.setChecked(false);
                currSubject.setChosen(false);
            }
        }
    });

    return listItemView;
}

private class ViewHolder {
    CheckBox checkBox;
}

列表视图/适配器中的复选框是自己“按下”的

2 个答案: