ViewPager报UnsupportedOperationException: Required method instantiateItem was not overridden错误

写一个简单的viewpager出现了下面这个报错信息。

提示我们需要重写 instantiateItem方法：

解决问题：adapter里边重写instantiateItem方法并改为如下所示。

public class PicCarouseVpAdapter extends PagerAdapter {
    private List pageList;

    public PicCarouseVpAdapter(List pageList) {
        this.pageList = pageList;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        // 返回要展示的图片数量
        return pageList.size();
    }

    @Override
    public boolean isViewFromObject(View arg0, Object arg1) {
        // TODO Auto-generated method stub
        // 刚开始用viewpager就直接写“return arg0 == arg1;”就好啦
        return arg0 == arg1;
    }


    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        container.addView(pageList.get(position));
        //每次滑动的时候把视图添加到viewpager
        return pageList.get(position);
    }


    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        // TODO Auto-generated method stub
        // 将当前位置的View移除
        container.removeView(pageList.get(position));
    }
}