黑莓 - 获取从复选框列表中选中的项 [英] Blackberry - get checked items from list with checkboxes

问题描述

如何检查所有从列表中的项目可以获取的？

How can all checked items from a list can be fetched?

我需要得到列表中的所有选择（选中）项目和填充的矢量。

I need to get all selected (checked) items from the list and populate a vector.

我没有得到所有选定的项目，我只得到上目前的重点是该项目。

I am not getting all selected items, I am getting only the item on which current focus is.

我实现listfield与复选框根据的知识库文章。

I am implementing listfield with checkboxes as per the knowledgebase article.

如果我使用getSelection（），它返回我当前突出显示列表行的索引，而不是已经检查了所有。

If I use getSelection(), it is returning me the currently highlighted list row index, and not all that have been checked.

推荐答案

正如我undestood，样品是<一个href=\"http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/800505/800345/How_To_-_Create_a_ListField_with_check_boxes.html?nodeid=1165752&vernum=0\"相对=nofollow>如何 - 创建一个ListField与复选框

As I undestood, sample is How To - Create a ListField with check boxes

然后就可以添加矢量到ListFieldCallback实现类：

Then you can add Vector to the class where ListFieldCallback is implemented:

private Vector _checkedData = new Vector();
public Vector getCheckedItems() {
        return _checkedData;
    }

和更新drawListRow是这样的：

and update drawListRow this way:

if (currentRow.isChecked())
{
    if( -1 ==_checkedData.indexOf(currentRow))
        _checkedData.addElement(currentRow);
    rowString.append(Characters.BALLOT_BOX_WITH_CHECK);
}
else
{
    if( -1 !=_checkedData.indexOf(currentRow))
        _checkedData.removeElement(currentRow);
    rowString.append(Characters.BALLOT_BOX);
}

---

如果您将使用VerticalFieldManager自定义CheckBoxField字段，你可以遍历屏幕上的所有字段（或经理），并检查其复选框字段，然后取一个值：

---

If you would use VerticalFieldManager with custom CheckBoxField, you could iterate over all fields on screen (or any manager) and check if its' checkbox field, then take a value:

class List extends VerticalFieldManager {
...
    public Vector getCheckedItems() {
        Vector result = new Vector();
        for (int i = 0, cnt = getFieldCount(); i < cnt; i++) {
            Field field = getField(i);
            if (field instanceof CheckboxField) {
                CheckboxField checkboxField = (CheckboxField) field;
                if (checkboxField.isChecked())
                    result.addElement(checkboxField);
            }
        }
        return result;
    }
}

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