How to save the position of a ScrollView when the orientation changes in Android July 28, 2011

To save and restore the scroll position of a ScrollView when the phone orientation changes you can do the following:
Save the current position in the onSaveInstanceState method:

    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putIntArray("ARTICLE_SCROLL_POSITION",
                new int[]{ mScrollView.getScrollX(), mScrollView.getScrollY()});
    }

Then restore the position in the onRestoreInstanceState method, note that we need to post a runnable to the ScrollView to get this to work:

    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        final int[] position = savedInstanceState.getIntArray("ARTICLE_SCROLL_POSITION");
        if(position != null)
            mScrollView.post(new Runnable() {
                public void run() {
                    mScrollView.scrollTo(position[0], position[1]);
                }
            });
    }

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