ViewPagerAdapter

class ViewPagerAdapter(fm: FragmentManager?) : FragmentStatePagerAdapter(fm) {

    private var mFragmentList: ArrayList<Fragment> = ArrayList()
    private var mFragmentTitleList: ArrayList<String> = ArrayList()

    fun addFragment(fragment: Fragment, s: String) {
        mFragmentList.add(fragment)
        mFragmentTitleList.add(s)
    }

    override fun getCount(): Int {
        return mFragmentList.size
    }

    override fun getItem(n: Int): Fragment {
        return mFragmentList[n]
    }

    override fun getPageTitle(n: Int): CharSequence? {
        return mFragmentTitleList[n]
    }
}