Android ScrollView 滚动到底部

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.

Answer 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);

Answer 2

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

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

Answer 3

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.