Android 如何在包含多个视图类型的ScrollView中检测不可见视图

目前，我在

ScrollView

// This is code for class extends from ScrollView
@Override
public void onScrollChanged(int l, int t, int oldl, int oldt) {
    super.onScrollChanged(l, t, oldl, oldt);

    LinearLayout list = (LinearLayout)this.findViewById(R.id.card_container);

    for (int i = 0; i < list.getChildCount(); ++i) {
        View card = list.getChildAt(i);

        list.getHitRect(mRect);
        // If tag == 'false' and View is visible we know that
        // View became visible during this scroll event.
        if ((Boolean) card.getTag() == false
                && card.getLocalVisibleRect(mRect)) {
            card.startAnimation(AnimationUtils.loadAnimation(getContext(),
                    R.anim.slide_up));                
            card.setTag(true);
        }
    }
}

根据上面的代码和布局，系统将知道我第一次向下滚动时，从第4个位置开始的卡不可见

但是，如果我在卡片顶部添加一些其他视图

<ScrollView>
    <LinearLayout>
        <LinearLayout button_container>
            <Button />
            <Button />
            <Button />
        </Linear>
        <LinearLayout card_container>
            <Card />
            <Card />
            <Card />
            <Card />
            <Card />
        </LinearLayout>
    </LinearLayout>
</ScrollView>

添加按钮容器后，我希望系统告诉我，从第二个位置开始的卡不可见（因为按钮容器占用了以前的一些空间）

但是，系统仍然让我知道，从第4位开始的卡不可见。（这是不正确的）

---

有什么办法可以解决这个问题吗？

我使用

getGlobalVisibleRect

。我不确定这是一个好的解决方案

// This is code for class extends from ScrollView
@Override
public void onScrollChanged(int l, int t, int oldl, int oldt) {
    super.onScrollChanged(l, t, oldl, oldt);

    LinearLayout list = (LinearLayout)this.findViewById(R.id.card_container);


    for (int i = 0; i < list.getChildCount(); ++i) {
        View card = list.getChildAt(i);

        // If tag == 'false' and View is visible we know that
        // View became visible during this scroll event.
        if ((Boolean) card.getTag() == false
                && card.getGlobalVisibleRect(mRect)) {
            card.startAnimation(AnimationUtils.loadAnimation(getContext(),
                    R.anim.slide_up));                
            card.setTag(true);
        }
    }
}

//这是从ScrollView扩展的类的代码
@凌驾
CrollChanged上的公共无效（int l、int t、int oldl、int oldt）{
super.onScrollChanged（l，t，oldl，oldt）；
LinearLayout list=（LinearLayout）this.findViewById（R.id.card\u容器）；
对于（int i=0；i

// This is code for class extends from ScrollView
@Override
public void onScrollChanged(int l, int t, int oldl, int oldt) {
    super.onScrollChanged(l, t, oldl, oldt);

    LinearLayout list = (LinearLayout)this.findViewById(R.id.card_container);


    for (int i = 0; i < list.getChildCount(); ++i) {
        View card = list.getChildAt(i);

        // If tag == 'false' and View is visible we know that
        // View became visible during this scroll event.
        if ((Boolean) card.getTag() == false
                && card.getGlobalVisibleRect(mRect)) {
            card.startAnimation(AnimationUtils.loadAnimation(getContext(),
                    R.anim.slide_up));                
            card.setTag(true);
        }
    }
}