package com.fanxin.huangfangyi.main.widget.custom; import android.annotation.SuppressLint; import android.support.v4.view.ViewPager; import android.view.View; /** * Created by Mr_immortalZ on 2016/5/2. * email : mr_immortalz@qq.com */ public class DepthPageTransformer implements ViewPager.PageTransformer { private static float MIN_SCALE = 0.75f; @SuppressLint("NewApi") @Override 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(0); } else if (position <= 0) { // [-1,0] // Use the default slide transition when // moving to the left page view.setAlpha(1); view.setTranslationX(0); view.setScaleX(1); view.setScaleY(1); } else if (position <= 1) { // (0,1] // Fade the page out. view.setAlpha(1 - position); // Counteract the default slide transition view.setTranslationX(pageWidth * -position); // Scale the page down (between MIN_SCALE and 1) float scaleFactor = MIN_SCALE + (1 - MIN_SCALE) * (1 - Math.abs(position)); view.setScaleX(scaleFactor); view.setScaleY(scaleFactor); } else { // (1,+Infinity] // This page is way off-screen to the right. //view.setAlpha(0); } } }