Question

I have a ScrollView with a LinearLayout inside an I’m adding TextViews. But I always want the last added TextView to be visible, so I need the ScrollView to scroll to the Bottom, when a TextView is added. I don’t know why, but when I call scrollto(), scrollby() or fullScroll() after adding a textview, it only scrolls to the textview before the last one.

Do you know a better way to do this?

Thanks a lot!

Code:

I got a Button, which calls this function:

private void addRound() {
    // TODO Auto-generated method stub
    TextView newRound = new TextView(Stopwatch.this);
    newRound.setText("" + counter + ". - " + timerText());
    newRound.setTextSize(20);
    newRound.setGravity(Gravity.CENTER);
    linlay.addView(newRound);
    counter++;
}

After calling this function I call fullScroll().

addRound();
sv.fullScroll(View.FOCUS_DOWN);

sv ist my ScrollView, linlay is the linearlayout inside the scrollview.

Answer 1

I reckon it’s because the ScrollView is not quite updated by the time you call sv.scrollFull(View.FOCUS_DOWN); Try the following (to replace your second code sample):

addRound();
sv.post(new Runnable() {

   @Override
   public void run() {
     sv.fullScroll(View.FOCUS_DOWN);
   }
});

If the above doesn’t work, try the following (it’s not an elegant way of doing it but it may work):

addRound();
sv.postDelayed(new Runnable() {

   @Override
   public void run() {
     sv.fullScroll(View.FOCUS_DOWN);
   }
}, 100);

Hope this works!