Android: ScrollView overall height

Question

I have my own ScrollView (advanced android.widget.ScrollView), which I use in my layout. I want to measure the overall height of the contents of this scroll. getHeight () and getMeasuredHeight () do not give me the correct values ​​(numbers are too high).

Background information: I want to determine how far the user scrolls. I use onScrollChanged to get the X value, but I need to know the percentage, so I need the overall scrollbar height.

Thank you so much! Erik

Answer 1

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

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

Answer 2

See ScrollView source. Unfortunately, this method is private, but you can copy it into your own code. Please note that other answers do not include registration

 private int getScrollRange() { int scrollRange = 0; if (getChildCount() > 0) { View child = getChildAt(0); scrollRange = Math.max(0, child.getHeight() - (getHeight() - mPaddingBottom - mPaddingTop)); } return scrollRange; }