到达视图寻呼机结束时将视图寻呼机移动到第一个项目

Question

以下是我的instantiateItem方法

@Override
    public Object instantiateItem(ViewGroup container, int position) {
        View itemView = mLayoutInflater.inflate(R.layout.pager_item, container, false);

        ImageView imageView = (ImageView) itemView.findViewById(R.id.img);
        TextView textView = (TextView) itemView.findViewById(R.id.txt);
        imageView.setImageResource(mResources[position]);
        textView.setText(mCompanies[position]);
        container.addView(itemView);

        return itemView;
    }

我想通过滚动来检测用户是否已到达视图寻呼机的末尾，如果用户已到达结尾，我想从左到右摇动整个viewpager。我怎么能这样做？

Answer 1

@Override
public void onPageScrollStateChanged(int state) {

     //mImageResource is image array

    if(state<mImageResources.length)
    {
   //intro_images is viewpager           
   intro_images.setCurrentItem(0,true);
    }

}

Answer 2

你可以使用OnPageChangeListener来实现这个

pager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                if(position == lastPosition){
                    pager.setCurrentItem(0, true);
                }
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });