Question

您好我从这里使用TouchListView控件：https://github.com/commonsguy/cwac-touchlist 我添加了一些按钮添加到页脚中的列表：

    mFooter = getLayoutInflater().inflate(R.layout.edit_homepage_footer_layout, null);
    mListView = (TouchListView) findViewById(R.id.sectionList);
    mListView.addFooterView(mFooter);

在我拖动列表中的某个项目之前，这一切似乎都正常工作，此时页脚会折叠（我认为是一个列表项的高度），模糊了我添加的按钮。

有人可以为此建议修复/解决方法吗？

Answer 1

我实际上在询问之后很快就解决了这个问题（总是那样......）

问题出在doExpansion（）和unExpandViews（）方法中，这些方法修改了列表中的每个项目，包括页脚。为了解决这个问题，我创建了一个方法来检查我们是否正在处理可拖动的项目或页脚：

private boolean isDraggableItem(View view) {
    View dragger = view.findViewById(grabberId);
    return dragger != null;
}

然后修改提到的方法如下：

private void unExpandViews(boolean deletion) {
    for (int i = 0; ; i++) {
        View v = getChildAt(i);
        if (v == null) {
            if (deletion) {
                // HACK force update of mItemCount
                int position = getFirstVisiblePosition();
                int y = getChildAt(0).getTop();
                setAdapter(getAdapter());
                setSelectionFromTop(position, y);
                // end hack
            }
            layoutChildren(); // force children to be recreated where needed
            v = getChildAt(i);
            if (v == null) {
                break;
            }
        }
        if (isDraggableItem(v)) { //check this view isn't the footer
            ViewGroup.LayoutParams params = v.getLayoutParams();
            params.height = mItemHeightNormal;
            v.setLayoutParams(params);
            v.setVisibility(View.VISIBLE);
        }
    }
}

private void doExpansion() {
    Log.d(logTag, "Doing expansion");
    int childnum = mDragPos - getFirstVisiblePosition();
    if (mDragPos > mFirstDragPos) {
        childnum++;
    }

    View first = getChildAt(mFirstDragPos - getFirstVisiblePosition());

    for (int i = 0; ; i++) {
        View vv = getChildAt(i);
        if (vv == null) {
            break;
        }
        int height = mItemHeightNormal;
        int visibility = View.VISIBLE;
        if (vv.equals(first)) {
            // processing the item that is being dragged
            if (mDragPos == mFirstDragPos) {
                // hovering over the original location
                visibility = View.INVISIBLE;
            } else {
                // not hovering over it
                height = 1;
            }
        } else if (i == childnum) {
            if (mDragPos < getCount() - 1) {
                height = mItemHeightExpanded;
            }
        }
        if (isDraggableItem(vv)) { //check this view isn't the footer
            ViewGroup.LayoutParams params = vv.getLayoutParams();
            params.height = height;
            vv.setLayoutParams(params);
            vv.setVisibility(visibility);
        }
    }
}

值得更新github项目以包含这个我认为。

将页脚添加到Android TouchListView

1 个答案: