How to Programmatically Scroll a ScrollView to Bottom

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?

Solution 1:

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.

Solution 2:

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"

Solution 3:

this will be ok

scrollView.post(new Runnable() {
    @Override

    public void run() {

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

    }
});

Solution 4:

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