viewpager binding adapter

example.xml

<layout>
<data>
  <variable
    name="adapter"
    type="path" />
</data>

...

</layout>

ViewPagerBindingAdapter

public class ViewPagerBindingAdapter {
    private static final Logger mLog = LoggerFactory.getLogger(ViewPagerBindingAdapter.class);

    @InverseBindingAdapter(attribute = "app:currentItem")
    public static int currentItem(@NonNull ViewPager viewpager) {
        return viewpager.getCurrentItem();
    }

    @BindingAdapter("bindOffscreenPageLimit")
    public static void bindOffscreenPageLimit(@NonNull ViewPager viewpager, int limit) {
        viewpager.setOffscreenPageLimit(limit);
    }

    @BindingAdapter("bindAdapter")
    public static void bindAdapter(@NonNull ViewPager viewpager, FragmentPagerAdapter adapter) {
        if (mLog.isTraceEnabled()) {
            mLog.trace("BIND ADAPTER " + adapter);
        }

        viewpager.setAdapter(adapter);
    }

    @BindingAdapter("bindPageChangeListener")
    public static void bindPageChangeListener(@NonNull ViewPager viewpager, ViewPager.OnPageChangeListener listener) {
        if (mLog.isTraceEnabled()) {
            mLog.trace("BIND PAGE CHANGE LISTENER");
        }

        viewpager.addOnPageChangeListener(listener);
    }
}