ViewPager使用笔记
1.ViewPager.setCurrentItem(position),即使已设置动画,但是没有动画效果
原因:因为ViewPager滑动之前的时间间隔太短,可以通过反射,去修改ViewPager自动滑动时间,代码实现如下
1 public class ViewPagerScroller extends Scroller { 2 3 /**ViewPager滑动时间*/ 4 private int mScrollDuration = 0; 5 6 public ViewPagerScroller(Context context, int scrollDuration){ 7 super(context); 8 mScrollDuration = scrollDuration; 9 } 10 11 public static void setViewPagerScrollDuration(ViewPager viewPager, int scrollDuration){ 12 try { 13 Field mScroller = ViewPager.class.getDeclaredField("mScroller"); 14 mScroller.setAccessible(true); 15 ViewPagerScroller scroller = new ViewPagerScroller(viewPager.getContext( ), scrollDuration); 16 mScroller.set(viewPager, scroller); 17 }catch(Exception e){ 18 e.printStackTrace(); 19 } 20 } 21 22 @Override 23 public void startScroll(int startX, int startY, int dx, int dy, int duration) { 24 super.startScroll(startX, startY, dx, dy, mScrollDuration); 25 } 26 @Override 27 public void startScroll(int startX, int startY, int dx, int dy) { 28 super.startScroll(startX, startY, dx, dy, mScrollDuration); 29 } 30 }
调用
ViewPagerScroller.setViewPagerScrollDuration(mViewPager, VIEW_PAGER_SCROLL_DURATION);