Question

我有一个带有自定义数组适配器的listview，我正在试图弄清楚如何保持检查位置的状态。我想在每次检查项时将复选框位置保存到int数组，然后在getView中如果数组包含它将设置的数字isChecked（）== true。但是，我真的不知道如何搜索数组。任何帮助都会很棒！这是适配器上的一些基本代码：

 @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        final Contact c = (Contact) getItem(position);
        final ViewHolder viewHolder = new ViewHolder();
        // if the array item is null, nothing to display, just return null
        if (c == null) {
            return null;
        }

        LayoutInflater inflater = (LayoutInflater)
        getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        TwoLineListItem view;


        if (convertView == null) {
            view = (TwoLineListItem) inflater.inflate(resourceId, parent, false);
        } else {
            view = (TwoLineListItem) convertView;
        }

        final int pos = position;
       final SharedPreferences myprefs = PreferenceManager.getDefaultSharedPreferences(getContext());
        final SharedPreferences.Editor editor = myprefs.edit();
        viewHolder.checkbox = (CheckBox)view.findViewById(R.id.checkbox);

        viewHolder.checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (buttonView.isChecked()){

                contactInfo.add(pos+","+c.getName()+","+c.getNumber());

                StringBuilder sb = new StringBuilder();
                for (String s : contactInfo)
                {
                    sb.append(s);
                    sb.append("\t");
                }

                editor.putString("contacts", sb.toString()).commit();



                }else {
                    contactInfo.remove(pos+","+c.getName()+","+c.getNumber());
                    StringBuilder sb = new StringBuilder();
                    for (String s : contactInfo)
                    {
                        sb.append(s);
                        sb.append("\t");
                    }
                    editor.putString("contacts", sb.toString()).commit();

                }
            }
        });

Answer 1

CheckBox check =(CheckBox)v.findViewById(R.id.check);
            check.setTag(new Integer(childPosition));
            check.setChecked(listEditable.get(childPosition).isSelected());
            check.setOnCheckedChangeListener(new OnCheckedChangeListener() {          
                  public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
                    {
                        Integer myPosition=(Integer)buttonView.getTag();
                        if ( isChecked )
                        {
                            listEditable.get(myPosition).setSelected(true);
                        }
                        else
                        {
                            listEditable.get(myPosition).setSelected(false);
                        }
                    }         
            });

如何记住复选框位置？

1 个答案: