How to Programmatically Scroll a ScrollView to Bottom
JavaAndroidAndroid LayoutAndroid ScrollviewJava Problem Overview
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?
Java Solutions
Solution 1 - Java
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 - Java
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 - Java
this will be ok
scrollView.post(new Runnable() {
@Override
public void run() {
scroll.scrollTo(0, scroll.getBottom());
}
});
Solution 4 - Java
Have you tried scroll.fullScroll(View.FOCUS_DOWN)
?
Solution 5 - Java
you can apply this also
mScrollviewHomepage.setScrollY(View.FOCUS_DOWN);
Solution 6 - Java
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);
Solution 7 - Java
I Hope it Work
Try this:
nsscroll.post(new Runnable() { @Override
public void run() {
nsscroll.scrollTo(0, nsscroll.getBottom());
}
});