Use smoothScrollTo in Fragment

Question

I have following situation:

I'm using a Navigation Drawer to make the user easily navigate between different topics.

You can find a picture here:

https://drive.google.com/file/d/0B2gMUEFwlGRfSHRzVlptYmFQTXc/edit?usp=sharing

When clicking on a heading, like General the only the main content view is replaced, by using a fragment and a layout file. But when the user clicks on a subheading, like Gameplay, the layout changes, AND it should scroll down to a specifc view in the layout.

So in my fragment class I'm using the "onViewCreated" method and the smoothScrollTo method, provided by a ScrollView. The ScrollView and the RelativeLayout are both not null, and set to the right id, set in "onCreateView"

Codesnippets:

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    if (getArguments().getBoolean(ARG_BOOL)) {
        scrollView = (ScrollView)getView().findViewById(scrollID);
        relativeLayout = (RelativeLayout)getView().findViewById(relativeID);

        ((ScrollView)getView().findViewById(scrollID)).smoothScrollTo(
                0, (getView().findViewById(relativeID)).getLeft());

        Toast.makeText(getApplicationContext(), "SCROLL",Toast.LENGTH_SHORT).                  
                show();
        }
     }

The problem is that it is not executing the "smoothScrollTo" method, while the toast gets executed.

Here I call the fragment (boolean scroll is used to control the smoothScrollTo method):

private void selectItem(int Id, boolean scroll) {
    Fragment fragment = new ContentFragment();
    Bundle args = new Bundle();
    args.putBoolean(ContentFragment.ARG_BOOL, scroll);
    args.putInt(ContentFragment.ARG_ITEM_ID, Id);
    fragment.setArguments(args);

    // Insert the fragment by replacing any existing fragment
    FragmentManager fragmentManager = getFragmentManager();
    fragmentManager.beginTransaction()
            .replace(R.id.content_frame, fragment)
            .commit();
    // Highlight the selected item, update the title, and close the drawer
    TextView textView = (TextView) findViewById(Id);
    getActionBar().setTitle(textView.getText());
    mDrawerLayout.closeDrawer(mDrawerList);
} 

Thanks for your help ;-)

EDIT: SOLUTION:

if (getArguments().getBoolean(ARG_BOOL)) {
    getView().findViewById(scrollID).post(new Runnable() {
        @Override
        public void run() {
            ((ScrollView) getView().findViewById(scrollID)).
                smoothScrollTo(0, (getView().findViewById(relativeID)).getTop());
        }
    });
}

Answer 1

Try calling smoothScrollTo method in calling post of the view:

ScrollView scrollView = (ScrollView)getView().findViewById(scrollID);
scrollView.post(new Runnable() {

    @Override
    public void run() {
        scrollView.smoothScrollTo(0,(getView().findViewById(relativeID)).getTop());
    }
});