ViewPager制作循环滚动图片

原理：

核心代码如下：

private int[] hotIds = new int[] { R.drawable.hot1, R.drawable.hot2,R.drawable.hot3, R.drawable.hot4 };private List<View> pagerList;private LinearLayout pagerPoints;private void setViewPager() {pagerList = new ArrayList<View>();for (int i = 0; i < hotIds.length + 2; i++) {ImageView iv = new ImageView(SecondActivity.this);if (i == 0) {iv.setImageResource(hotIds[hotIds.length - 1]);} else if (i == hotIds.length + 1) {iv.setImageResource(hotIds[0]);} else {iv.setImageResource(hotIds[i - 1]);}pagerList.add(iv);}pagerPoints = (LinearLayout)this.findViewById(R.id.second_pager_point);for (int i = 0; i < hotIds.length; i++) {ImageView iv = new ImageView(SecondActivity.this);iv.setImageResource(R.drawable.selector_pager_point);pagerPoints.addView(iv);}ImageView firstPoint = (ImageView)pagerPoints.getChildAt(0);firstPoint.setSelected(true);mViewPager = (ViewPager) this.findViewById(R.id.second_scroll_picture);mViewPager.setAdapter(new PagerAdapter() {@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {// TODO Auto-generated method stubreturn arg0 == arg1;}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn pagerList.size();}@Overridepublic Object instantiateItem(ViewGroup container, int position) {((ViewPager) container).addView(pagerList.get(position));return pagerList.get(position);}@Overridepublic void destroyItem(ViewGroup container, int position,Object object) {((ViewPager) container).removeView(pagerList.get(position));}});mViewPager.setCurrentItem(1); // 设置当前pager为1，即开始时就可以向右活动mViewPager.setOnPageChangeListener(new OnPageChangeListener() {@Overridepublic void onPageSelected(int position) {// TODO Auto-generated method stub// System.out.println("--onPageSelected--" + position);for (int i = 0; i < pagerPoints.getChildCount(); i++) {pagerPoints.getChildAt(i).setSelected(false);}//判断是否为最前面的图片，或最后没的图片if (position == 0) {//pager划到第一页时跳到末尾页mViewPager.setCurrentItem(pagerList.size()-2, false);//设置所在图片的 点pagerPoints.getChildAt( pagerPoints.getChildCount()-1).setSelected(true);} else if (position == pagerList.size()-1) {//pager划到最后一页时跳到首页mViewPager.setCurrentItem(1, false);//设置所在图片的 点pagerPoints.getChildAt(0).setSelected(true);}else{//设置所在图片的 点pagerPoints.getChildAt(position-1).setSelected(true);}}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {}@Overridepublic void onPageScrollStateChanged(int position) {}});}