How to Programmatically Scroll a ScrollView to Bottom

Question

I've a problem I can't solve: inside a ScrollView I only have a LinearLayout. By a user action I'm programmatically adding 2 TextView on this LinearLayout, but by the default the scroll keeps on the top. Since I controll the user action, I should be easy to scroll to the bottom with something like:

ScrollView scroll = (ScrollView) this.findViewById(R.id.scroll);
scroll.scrollTo(0, scroll.getBottom());

But actually not. Because immediately after adding this two new elements getBottom() still returns the previous two. I tried to refresh the state invoking refreshDrawableState(), but I doesn't work.

Do you have any idea how could I get the actual bottom of a ScrollView after adding some elements?

Actually ScrollView may change or not change it's height(it is a container for LinearLayout). Try to use getBottom() of ScrollView's first(and single) child LinearLayout. — Olsavage
– Olsavage, Commented Nov 4, 2011 at 21:00
Both containers (ScrollView and LinearLayout) look that they have the same issue: the bottom position doesn't reflect the last added items :-/ — wikier
– wikier, Commented Nov 5, 2011 at 9:45
Post the code, where you're adding new elements. It is hard to say without your code. I think, it may be weights issue or something. — Olsavage
– Olsavage, Commented Nov 5, 2011 at 10:06

Steve Bergamini · Accepted Answer · 2020-02-07 14:52:54Z

151

You need to use the message queue or else it won't work. Try this:

scrollView.post(new Runnable() {
    @Override
    public void run() {
        scrollView.fullScroll(ScrollView.FOCUS_DOWN);
    }
});

This is what worked for me.

edited Feb 7, 2020 at 14:52

answered Apr 18, 2012 at 20:31

Steve Bergamini

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2 Comments

ashishdhiman2007 Over a year ago

this also works for NestedScrollView, i tried. Thanks

Sadda Hussain Over a year ago

this is the recommended for full scroll, scrollTo() methods does not scroll to full top.

metalwihen · Accepted Answer · 2017-11-09 08:15:10Z

86

This doesn't actually answer your question. But it's an alternative which pretty much does the same thing.

Instead of Scrolling to the bottom of the screen, change the focus to a view which is located at the bottom of the screen.

That is, Replace:

scroll.scrollTo(0, scroll.getBottom());

with:

Footer.requestFocus();

Make sure you specify that the view, say 'Footer' is focusable.

android:focusable="true"
android:focusableInTouchMode="true"

edited Nov 9, 2017 at 8:15

answered May 5, 2012 at 5:18

metalwihen

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5 Comments

Kushal Over a year ago

This focusable property is very nice to be used in this scenario... when having complex layout.. thanks

kiwicomb123 Over a year ago

I am finding it difficult to get the view at the bottom of the screen. I have a ListView that contains TextViews. I've attempted listView.getItemAtPosition(elementCount -1) to get that text view, but instead it returns a String instead of a view. I suspect that I will need to make a custom arrayAdapter in this case.

Kishan Solanki Over a year ago

when there's a button at the bottom then ripple effect would be shown in the button which makes it weired!

Vijay Over a year ago

It works perfectly if you are doing showCaseView

CoolMind Over a year ago

If you call footer.requestFocus() several times, don't forget to remove focus! footer.clearFocus() or another_edit_text.requestFocus() and then footer.requestFocus().

Marek Grzenkowicz · Accepted Answer · 2012-06-25 10:01:30Z

21

this will be ok

scrollView.post(new Runnable() {
    @Override

    public void run() {

        scroll.scrollTo(0, scroll.getBottom());

    }
});

edited Jun 25, 2012 at 10:01

Marek Grzenkowicz

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answered Jun 25, 2012 at 9:55

sxk

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Comments

TotoroTotoro · Accepted Answer · 2011-11-04 21:50:43Z

5

Have you tried scroll.fullScroll(View.FOCUS_DOWN)?

answered Nov 4, 2011 at 21:50

TotoroTotoro

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1 Comment

wikier Over a year ago

scroll.fullScroll(View.FOCUS_DOWN) was the first thing I tried, but it doesn't work.

Sunny Jha · Accepted Answer · 2021-01-06 14:03:54Z

2

Since, I am also using hide keyboard, below code with a delay of 200 milli second worked better for me. Note: I just replaced post() with postDelayed() from above examples:

    final ScrollView scrollView_main = (ScrollView) findViewById(R.id.scrollView_main);
    scrollView_main.postDelayed(new Runnable() {
        @Override
        public void run() {
            scrollView_main.fullScroll(View.FOCUS_DOWN);
        }
    }, 200);

answered Jan 6, 2021 at 14:03

Sunny Jha

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2 Comments

Vijay Over a year ago

this is copied from another answer

Sunny Jha Over a year ago

I had already added note. Note: I just replaced post() with postDelayed() from above examples The issue with me is, I am also using hide keyboard. hence post() did not help me. "200 milliseconds" delay did the magic for me.

Aalishan Ansari · Accepted Answer · 2018-05-29 09:35:00Z

0

you can apply this also

 mScrollviewHomepage.setScrollY(View.FOCUS_DOWN);

answered May 29, 2018 at 9:35

Aalishan Ansari

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Comments

Kushal Prajapati · Accepted Answer · 2022-02-08 13:28:26Z

-1

I Hope it Work

Try this:

nsscroll.post(new Runnable() { @Override

                    public void run() {

                        nsscroll.scrollTo(0, nsscroll.getBottom());

                    }
                });

answered Feb 8, 2022 at 13:28

Kushal Prajapati

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