viewpager pageTransformer

DepthPageTransformer.java

public class DepthPageTransformer implements ViewPager.PageTransformer {


    public static final float MIN_SCALE = 0.75f;

    @Override
    public void transformPage(View page, float position) {

        int pageWidth = page.getWidth();

        if (position < -1) {
            page.setAlpha(0);
        } else if (position <= 0) {
            page.setAlpha(1);
            page.setTranslationX(0);
            page.setScaleX(1);
            page.setScaleY(1);

        } else if (position <= 1) {
            page.setAlpha(1 - position);
            page.setTranslationX(pageWidth * -position);
            float scaleFactor = MIN_SCALE + (1 - MIN_SCALE) * (1 - Math.abs(position));
            page.setScaleX(scaleFactor);
            page.setScaleY(scaleFactor);
        } else {
            page.setAlpha(0);
        }

    }
}