Backing to ListActivity causing undesirable behavior

Question

I've been messing with some layouts for my ListActivity's ListView and found a problem:

When I click a list item it starts a new Activity. Unfortunately, when I click the back button to go back to my ListActivity, the scrollbar of the ListView is all the way at the top.

It used to be that, when I clicked the back button, the user would be scrolled to the same place in the list as they were before they selected the list item to launch a new screen.

I'm pretty sure I've removed all of the code I've changed, but the problem is still occurring. Any ideas?

Answer 1

If you're hitting on create in your code your list most likely is recreated and therefore position is not saved. Try to rotate device while in the ListActivity ( scroll to the middle and rotate ) and see if you see the problem . I'd cache the postion of the list and scroll List to it. Example of such things : http://developer.android.com/resources/tutorials/notepad/notepad-ex3.html

Answer 2

I figured out why this is happening

    @Override public void onStop() {
    super.onStop();
    if (mCursor != null) {
        mCursor.close();
        mCursor = null;
    }
    mAdapter.changeCursor(null);
}

I was told this is something I'm "supposed" to do. I think I can understand why. However, it causes the undesirable behavior I'm seeing here.