Handle states of orientation changes

Question

How can I handle all states of orientation event occurs?

Something like:

• before starting (save some screen states)
• when happening (animation purposes)
• after it's happen (load the screen state)

I know that onConfigurationChanged can handle orientation changes. And I tried this:

    public void onConfigurationChanged(Configuration cfg) {
        saveState();

        super.onConfigurationChanged(cfg);

        loadState();
    }

On saveState I store the lastIndex viewed on the Gallery on SharedPreferences. On loadState I get the lastIndex from the SharedPreferences and make it as the current on the Gallery.

I tried also put loadState in the onResume method but it's not called after the orientation change occurs.

Answer 1

before starting (save some screen states)

Use onSaveInstanceState() and/or onRetainNonConfigurationInstance() and/or a fragment on which you have called setRetainInstance(true)

when happening (animation purposes)

That is handled by the OS.

after it's happen (load the screen state)

Use onRestoreInstanceState() and/or getLastNonConfigurationInstance() (if you went the fragment route, your data is just naturally still there)

I know that onConfigurationChanged can handle orientation changes.

@EightEight's answer covers this nicely.