android弹出半屏界面,android – ViewPager滚动半屏

我有一个片段列表,我必须放在ViewPager中(到目前为止没问题).

ArrayList fragmentList = new ArrayList();

fragmentList.add(new fragment1());

fragmentList.add(new fragment2());

fragmentList.add(new fragment3());

fragmentList.add(new fragment4());

FragmentAdapter mAdapter = new FragmentAdapter( mFragmentManager, fragmentList);

mPager = (ViewPager) view.findViewById(R.id.pager_items_list);

mPager.setCurrentItem(0);

mPager.setAdapter(mAdapter);

mPager.setOnPageChangeListener(pageChangeListener);

适配器

public class FragmentAdapter extends FragmentStatePagerAdapter {

ArrayList fragmentsList;

public FragmentAdapter(FragmentManager fm, ArrayList fragmentsList) {

super(fm);

this.fragmentsList = fragmentsList;

}

@Override

public int getCount() {

return fragmentsList.size();

}

@Override

public Fragment getItem(int position) {

if (position

return fragmentsList.get(position);

}

return null;

}

}

我需要的是让ViewPager在屏幕上显示两个项目,但每次只滚动一个.

这张图片可以帮我解释一下我的意思：