android FragmentPagerAdapter的“标准”配置

private class ImagePagerAdapter extends FragmentPagerAdapter {

 

        public List<ImageItem> fileList;

 

        public ImagePagerAdapter(FragmentManager fm, List<ImageItem> fileList) {

            super(fm);

            this.fileList = fileList;

        }

 

        @Override

        public int getCount() {

            return fileList == null ? 0 : fileList.size();

        }

        @Override

        public int getItemPosition(Object object) {

            return POSITION_NONE;

        }

        @Override

        public boolean isViewFromObject(View view, Object obj) {

            return view == ((Fragment) obj).getView();

        }

        @Override

        public void destroyItem(ViewGroup container, int position, Object object) {

            Fragment fragment = ((Fragment) object);

            container.removeView(fragment.getView());

            FragmentUtils.removeFragmentRecently(getSupportFragmentManager(), fragment);

        }

        @Override

        public Fragment getItem(int position) {

            String url = fileList.get(position).getActualUrl();

            return ImageDetailFragment.newInstance(url);

        }

 

    }