Android ScrollView Scroll to Bottom

Question

The ScrollView in Android is really confusing. I'm working on an app that adds a fragment of text to a TextView inside the ScrollView, and I want it to scroll to the bottom of the ScrollView.

I've tried these ways:

Scroll1.fullScroll(View.FOCUS_DOWN);

Scroll1.scrollTo(0, sv.getBottom());

Scroll1.scrollTo(0, Scroll1.getY() + Scroll1.getHeight());

NOTE: 1. Scroll1 is the ScrollView I used. 2. The first two methods can't scroll to the bottom. The last just doesn't work.

How can I achieve this? Please help. Thanks.

Androider · Accepted Answer · 2015-08-30 15:45:32Z

1

try this it may helps if I know your problem: paste it in scroll view in xml

android:fillViewport="true"

OR

in java activity

scrollView.setFillViewport(true);

answered Aug 30, 2015 at 15:45

Androider

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Nikhil Tambe · Accepted Answer · 2018-01-05 13:01:39Z

0

use the following code once you want to update the scrollview:

scrollView.post(new Runnable() { 
     public void run() {
         scrollView.fullScroll(View.FOCUS_DOWN);
     }
 });

answered Jan 5, 2018 at 13:01

Nikhil Tambe

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Comments

Victor Pozdnyakov · Accepted Answer · 2020-07-07 09:31:35Z

Your scrollView may not scroll to bottom in onCreate until you give some time to the view to inflate fully.

So to make it scroll...

mScrollView.postDelayed(new Runnable() {
            @Override
            public void run() {
                View lastChild = mScrollView.getChildAt(mScrollView.getChildCount() - 1);
                int bottom = lastChild.getBottom() + mScrollView.getPaddingBottom();
                int sy = mScrollView.getScrollY();
                int sh = mScrollView.getHeight();
                int delta = bottom - (sy + sh);

                mScrollView.smoothScrollBy(0, delta);
            }
        },1000);

You can also use scrollView.fullScroll(View.FOCUS_DOWN); in run()

I combinde this from a lot of answers. It finally helped me.

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