android FragmentStatePagerAdapte

class MyAdapter(fm: FragmentManager, behavior: Int) : FragmentStatePagerAdapter(fm, behavior) {

    // 设置页面数量
    override fun getCount(): Int {
        TODO("Not yet implemented")
    }

    // 获取每个item
    override fun getItem(position: Int): Fragment {
        TODO("Not yet implemented")
    }

    // 设置标题，主要是用在TabLayout
    override fun getPageTitle(position: Int): CharSequence? {
        return super.getPageTitle(position)
    }
}