如何使片段动画可滑动

Question

I want to have a swipable layout with card flip animations in between. So far I've made one with a fragment and two buttons, when I click on one, it animates to the next or previous with flip. Is it possible to do it with swipes and make the buttons obsolete?(Something to do with Viewpager maybe?)

Answer 1

Yes, you can do this with a ViewPager.PageTransformer :

public class FlipPageTransformer implements ViewPager.PageTransformer {

    @Override
    public void transformPage(View page, float position) {
        if(position >= -0.5 && position <= 0.5) {
            page.setAlpha(1);
        } else {
            page.setAlpha(0);
        }

        if(position >= -1 && position <= 1) {
            page.setTranslationX(page.getWidth() * -position);
            page.setRotationY(position * 180);
        }
    }

}

Then apply the PageTransformer to a ViewPager :

mViewPager.setPageTransformer(true, new FlipPageTransformer());