getChildCount()返回不正确的孩子数量 [英] getChildCount() returns incorrect number of children

问题描述

我用X按钮创建了一个自定义TextView，单击该按钮后其可见性设置为GONE.现在，我想获得LinearLayout中可见的TextViews的数量.目前，我正在获取插入的TextView总数，而不是可见的总数.

I have created a custom TextView with an X button, whose visibility are set to GONE when the button is clicked. Now I want to get the number of visible TextViews in the LinearLayout. Currently, I am getting the count of total TextViews inserted rather than the visible ones.

示例:

当我有2个TextViews时，getChildCount()给出2个 但是如果我通过单击X按钮删除一个TextView，它仍然会给我2.为什么会发生这种情况?

When I have 2 TextViews, getChildCount() gives 2 but if I delete one TextView by clicking the X button, it still gives me 2. Why is this happening?

我已经创建了这样的东西:

I have created something like this:

这里的X是一个按钮，其onClick()会将TextView和Button的可见性都设置为GONE.

The X here is a button whose onClick() will set the visibility of both TextView and the Button to GONE.

推荐答案

如何获得可见孩子的数量?

how can I get the count of the visible children?

为此，您需要遍历视图/布局的子级并检查可见性.这是一个简单的循环:

Well for that you need to iterate over the children of the view/layout and check the visibility. It is a simple loop:

// untested/pseudocode
int visibleChildren = 0;
for (int i = 0; i < layout.getChildCount(); i++) {
    if (layout.getChildAt(i).getVisibility() == View.VISIBLE) {
        visibleChildren++;
    }
}

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