如何在Viewpager android中替换View

Question

我想通过viewpager创建电子书阅读器，这本书有600页，这是创建600视图的不好方法，因为它需要大量的内存。在每个页面我用sqlite数据库填充视图< / p>

我认为我必须创建2个视图并替换后向和前向页面的视图。

我查了这个链接 http://developers-club.com/posts/132406/

我的代码

Fragment khatm1 =new RootFragment();
Fragment khatm2 = new StaticFragment();

/* PagerAdapter class */
public class SlidePagerAdapter extends FragmentPagerAdapter {
    public SlidePagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        /*
         * IMPORTANT: This is the point. We create a RootFragment acting as
         * a container for other fragments
         */

        if  (currentItm > 604 || currentItm < 1){
            return null;
        }

        else {

            if (currentItm == 0)
                return new RootFragment();
            else
                return new StaticFragment();
        }


    }

    @Override
    public int getCount() {
        return NUM_ITEMS;
    }


    @Override
    public Object instantiateItem(View container, int position) {
        if (position == getCount() - 1) {
            if (khatm1 == null) {
                return super.instantiateItem(container, position);
            } else {
                return khatm1;
            }
        } else {
            return super.instantiateItem(container, position);
        }
    }

    @Override
    public void destroyItem(View container, int position, Object object) {
        if (position == getCount() - 1) {

        } else {
            super.destroyItem(container, position, object);
        }
    }


}

我如何解决我的问题？