Listeners

Setup skip button click listener

You have to implement View.OnClickListener interface and provide it to TutorialOptions.Builder#setOnSkipClickListener(OnClickListener). Example:

public class CustomTutorialFragment extends TutorialFragment {
    @Override
    protected TutorialOptions provideTutorialOptions() {
        return newTutorialOptionsBuilder(getContext())
                .setOnSkipClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Toast.makeText(getContext(), "Skip button clicked", Toast.LENGTH_SHORT).show();
                    }
                })
                // setup other configuration ...
                .build();
    }
}

Add OnTutorialPageChangeListener

You can listen change page events - just implement OnTutorialPageChangeListener and add listener via TutorialFragment#addOnTutorialPageChangeListener(OnTutorialPageChangeListener). To remove listener use TutorialFragment#removeOnTutorialPageChangeListener(OnTutorialPageChangeListener). In OnTutorialPageChangeListener#onPageChanged(int) method you will receive a page index every time page changes. If you enabled TutorialOptions.Builder#setUseAutoRemoveTutorialFragment(boolean) to true, you will receive TutorialFragment.EMPTY_FRAGMENT_POSITION (or TutorialSupportFragment.EMPTY_FRAGMENT_POSITION if you are using support library) as page index.

public class CustomTutorialFragment extends TutorialFragment
        implements OnTutorialPageChangeListener {

    private static final String TAG = "CustomTutorialFragment";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addOnTutorialPageChangeListener(this);
    }

    @Override
    public void onPageChanged(int position) {
        Log.i(TAG, "onPageChanged: position = " + position);
        if (position == TutorialFragment.EMPTY_FRAGMENT_POSITION) {
            Log.i(TAG, "onPageChanged: Empty fragment is visible");
        }
    }

}