content: package com.allure.lbanners.utils;
  
  import android.content.Context;
  import android.support.v4.view.ViewPager;
  import android.view.animation.Interpolator;
  import android.widget.Scroller;
  
  import java.lang.reflect.Field;
  
  /**
   * 控制Viewpager切换的时间
   * Created by lm on 2016/7/8.
   */
  public class ViewPagerScroller   extends Scroller {
      private int mScrollDuration = 2000;             // 滑动速度
  
      /**
       * 设置速度速度
       * @param duration
       */
      public void setScrollDuration(int duration){
          this.mScrollDuration = duration;
      }
  
      public ViewPagerScroller(Context context) {
          super(context);
      }
  
      public ViewPagerScroller(Context context, Interpolator interpolator) {
          super(context, interpolator);
      }
  
      public ViewPagerScroller(Context context, Interpolator interpolator, boolean flywheel) {
          super(context, interpolator, flywheel);
      }
  
      @Override
      public void startScroll(int startX, int startY, int dx, int dy, int duration) {
          super.startScroll(startX, startY, dx, dy, mScrollDuration);
      }
  
      @Override
      public void startScroll(int startX, int startY, int dx, int dy) {
          super.startScroll(startX, startY, dx, dy, mScrollDuration);
      }
  
  
  
      public void initViewPagerScroll(ViewPager viewPager) {
          try {
              Field mScroller = ViewPager.class.getDeclaredField("mScroller");
              mScroller.setAccessible(true);
              mScroller.set(viewPager, this);
          } catch(Exception e) {
              e.printStackTrace();
          }
      }
  }
  