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| public class ParallaxPageTransformer implements ViewPager.PageTransformer { | |
| public void transformPage(View view, float position) { | |
| int pageWidth = view.getWidth(); | |
| if (position < -1) { // [-Infinity,-1) | |
| // This page is way off-screen to the left. | |
| view.setAlpha(1); | |
| } else if (position <= 1) { // [-1,1] | |
| dummyImageView.setTranslationX(-position * (pageWidth / 2)); //Half the normal speed | |
| } else { // (1,+Infinity] | |
| // This page is way off-screen to the right. | |
| view.setAlpha(1); | |
| } | |
| } | |
| } |
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A great example is Yahoo’s Weather app, which became popular from this particular feature. Take a look at the gif below. The ViewPager’s pages slide normally, it’s the images that move with half the normal speed.