Android:ScrollView 的总高度 [英] Android: Total height of ScrollView

问题描述

我有一个自定义的 ScrollView(扩展的 android.widget.ScrollView)，我在我的布局中使用了它.我想测量此滚动视图内容的总高度.getHeight() 和 getMeasuredHeight() 没有给我正确的值(数字太高).

I have a custom ScrollView (extended android.widget.ScrollView) which I use in my layout. I want to measure the total height of the contents of this scrollview. getHeight() and getMeasuredHeight() don't give me correct values (too high numbers).

背景信息:我想确定用户滚动了多远.我使用 onScrollChanged 来获取 X 值，但我需要知道一个百分比，所以我需要滚动条的总高度.

Background information: I want to determine how far the user has scrolled. I use onScrollChanged to get the X value, but I need to know a percentage so I'll need the total scrollbar height.

非常感谢！埃里克

推荐答案

一个 ScrollView 总是有 1 个孩子.您需要做的就是获取孩子的身高以确定总身高:

A ScrollView always has 1 child. All you need to do is get the height of the child to determine the total height:

int totalHeight = scrollView.getChildAt(0).getHeight();

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