How to use

BackgroundToForegroundTransformer

in

com.ocnyang.pagetransformerhelp.transformer

@Override
protected void onTransform(View view, float position) {
  final float height = view.getHeight();
  final float width = view.getWidth();
  final float scale = min(position < 0 ? 1f : Math.abs(1f - position), 0.5f);
  view.setScaleX(scale);
  view.setScaleY(scale);
  view.setPivotX(width * 0.5f);
  view.setPivotY(height * 0.5f);
  view.setTranslationX(position < 0 ? width * position : -width * position * 0.25f);
}

case R.id.BackgroundToForegroundTransformer:
  getSupportActionBar().setTitle("BackgroundToForegroundTransformer");
  mBannerViewPager.setPageTransformer(new BackgroundToForegroundTransformer());
  break;
case R.id.CubeInTransformer: