ViewPager轮播适配器_viewpager适配器实现轮播展示-优快云博客

本文介绍了一个名为SyFragmentAdapter的PagerAdapter子类，该类用于在FragmentActivity中管理一系列图像视图。通过继承PagerAdapter并覆盖关键方法，如getCount、isViewFromObject及instantiateItem等，实现了无限循环显示图像的功能。

public class SyFragmentAdapter extends PagerAdapter {

    FragmentActivity context;
    List<SyBean.DataBean> syBean;
    public SyFragmentAdapter(FragmentActivity context, List<SyBean.DataBean> syBean) {
    this.context = context;
    this.syBean = syBean;
    }

    @Override
    public int getCount() {
        return Integer.MAX_VALUE;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view==object;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        ImageView imageView = new ImageView(context);
        imageView.setScaleType(ImageView.ScaleType.FIT_XY);
        ImageLoader.getInstance().displayImage(syBean.get(position%syBean.size()).getIcon(),imageView);
        container.addView(imageView);
        return imageView;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
       // super.destroyItem(container, position, object);
        container.removeView((View) object);
    }
}