android - ExpandableListView中的SwipeListView，可以吗？

Question

我正在使用 https://github.com/47deg/android-swipelistview创建带有可滑动项目的 ListView 。我想知道是否可以将此应用到 ExpandableListView 以便可以滑动子元素。

Answer 1

我已经能够让它发挥作用(至少对我而言)。以下是我采取的步骤列表:

• 复制 SwipeListView 类并重命名为 ExpandableSwipeListView。
• 让它从 ExpandableListView 扩展。
• 复制 SwipeListViewTouchListener 类并重命名为 ExpandableSwipeListViewTouchListener
• 将 ExpandableSwipeListView 内部的 SwipeListViewTouchListener 调用更改为 ExpandableSwipeListViewTouchListener。
• 将 SwipeListViewTouchListener 内的 SwipeListView 调用更改为 ExpandableSwipeListView。
• 将 ExpandableSwipeListViewTouchListener 的方法 resetItems 更改为:

-

/**
 * Adds new items when adapter is modified
 */
public void resetItems() {
    ExpandableListAdapter adp=swipeListView.getExpandableListAdapter();
    if (adp != null) {
        int count = 0;
        for (int i=0; i<adp.getGroupCount();i++){
            //Add the total children and the group itself.
            count+=adp.getChildrenCount(i) + 1;
        }
        for (int i = opened.size(); i <= count; i++) {
            opened.add(false);
            openedRight.add(false);
            checked.add(false);
        }
    }
}

• 使用以下内容在 res/values 上创建 expandableswipelistview__attrs.xml:

  <declare-styleable name="ExpandableSwipeListView">
      <attr name="swipeOpenOnLongPress"/>
      <attr name="swipeAnimationTime"/>
      <attr name="swipeOffsetLeft"/>
      <attr name="swipeOffsetRight"/>
      <attr name="swipeCloseAllItemsWhenMoveList"/>
      <attr name="swipeFrontView"/>
      <attr name="swipeBackView"/>
      <attr name="swipeGroupView" format="reference"/>
      <attr name="swipeMode"/>
      <attr name="swipeActionLeft"/>
      <attr name="swipeActionRight"/>
      <attr name="swipeDrawableChecked"/>
      <attr name="swipeDrawableUnchecked"/>
  </declare-styleable>
  

• 将标签 swipe:swipeGroupView 添加到布局上 ExpandableSwipeListView 的声明中。示例:

-

swipe:swipeGroupView="@+id/group"

• id 应该是唯一的，并且必须在您的组的布局上声明。
• 在 ExpandableSwipeListView 的初始化方法中，将所有样式更改为“ExpandableSwipeListView_...”，并在“obtainStyledAttributes”中将其设置为 R.styleable.ExpandableSwipeListView。
• 在 init 方法上添加 swipeGroupView，如 swipeFrontView，并将其传递给 ExpandableSwipeListViewTouchListener 构造函数。
• 在 ExpandableSwipeListViewTouchListener 上，在“if (allowSwipe && rect.contains(x, y)) {”之后添加以下代码:

-

//verify if it is a group:
if (child.findViewById(swipeGroupView)!=null){
    return false;
}

• 将这些方法添加到 ExpandableSwipeListView。它们有助于进行取消回调和其他操作:

-

/**
 * Returns the group and child positions for a child element.
 * This values are passed inside an array of dimension 2 where the index 0 is the group position and the index 1 is the child position.
 * @param general_position used on the list (compatible with getChildAt)
 * @return int[2] 0 => group position; 1 => child position
 */
public int[] getGroupAndChildPositions(int general_position){
    //get group and child ids
    int groupPosition=0;
    int childPosition=0;
    int helper=general_position;
    for (int i=0;i<getExpandableListAdapter().getGroupCount();i++){
        if (helper-getExpandableListAdapter().getChildrenCount(i)-1<=0){
            groupPosition=i;
            childPosition=helper-1;
            break;
        } else {
            helper-=getExpandableListAdapter().getChildrenCount(i)+1;
        }
    }
    return new int[]{groupPosition,childPosition};
}

/**
 * Returns the general position of an element on the list (used by getChildAt)
 * @param groupPosition
 * @param childPosition
 * @return the position on the list
 */
public int getGeneralPosition(int groupPosition, int childPosition){
    int position=0;
    for (int i=0;i<=groupPosition;i++){
        if (i<groupPosition)
            position+=getExpandableListAdapter().getChildrenCount(i)+1;
        else{
            position+=childPosition+1;
        }
    }
    return position;
}