Why Android ScrollView calls onScrollChanged() when the height of its child is less than the screen?

Question

I have a ScrollView with a RelativeLayout as its only child. Lately I noticed that the method:

@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {}

is called even when the child height is less than the ScrollView height as you can see below:

this refers to my ScrollView and rl refers to the RelativeLayout.

Is this a normal behavior or am I missing something?

Edit: I'm constantly adding and removing views from the RelativeLayout so disabling the scroll/touch etc. each time doesn't seem like a good solution.

My current fix is to check whether the scroll actually changed anything, if not, I'm just ignoring it:

    // in case no actual scroll has occurred - just return.
    if (t == oldt && l == oldl) {
        return;
    }

Answer 1

This is a normal behavior

If you want to stop ScrollView Scrolling then you must try this

scroll.setEnabled(false); 
scroll.setFocusable(false); 
scroll.setHorizontalScrollBarEnabled(false); 
scroll.setVerticalScrollBarEnabled(false);

Hope so this will work