页面滑动ViewPager

<android.support.v4.view.ViewPager                android:id="@+id/viewpager"                android:layout_width="match_parent"                android:layout_height="wrap_content" />

// 初始化PagerAdapter pagerAdapter = new PagerAdapter(getSupportFragmentManager(), mSubjectList);        binding.viewpager.setAdapter(pagerAdapter);

private class PagerAdapter extends FragmentStatePagerAdapter {        public ArrayList<IssuelistBean> issueList;        public PagerAdapter(FragmentManager fm, ArrayList<IssuelistBean> fileList) {            super(fm);            this.issueList = fileList;        }        @Override        public int getCount() {            return issueList == null ? 0 : issueList.size();        }        @Override        public Fragment getItem(int position) {            IssuelistBean issue = issueList.get(position);            return Fragment_Meeting_Subject.newInstance(issue.getId());        }    }