DepthPageTransformer.java

package com.steven.babyiyo.component;
import android.support.v4.view.ViewPager;
import android.view.View;

import com.steven.babyiyo.component.ViewPagerScroller;

import java.lang.reflect.Field;

//头部viewpager切换加动画
public class DepthPageTransformer implements ViewPager.PageTransformer {
    private static final float MIN_SCALE = 0.75f;


    public void transformPage(View view, float position) {



        //改变指示点的状态
        //把当前点enbale 为true
        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);
        }
    }



}