无法从TabLayout中删除片段

Question

我有ViewLager的TabLayout

点击关闭按钮，我尝试删除标签

closeIcon.setOnClickListener {
    tabLayout.removeTabAt(pos)
    fragments.removeAt(pos)
    fragmentsTitle.removeAt(pos)
    notifyDataSetChanged()
}

适配器代码：

class ViewPagerAdapter(fm: FragmentManager, private val tabLayout: TabLayout,
                           private val ctx: Context) : FragmentStatePagerAdapter(fm) {

    private val fragments = ArrayList<FileFragment>()
    private val fragmentsTitle = ArrayList<String>()

    override fun getItem(position: Int): FileFragment = fragments[position]

    override fun getCount(): Int = fragments.count()

    override fun getPageTitle(position: Int): CharSequence = fragmentsTitle[position]

    fun addFragment(fragment: FileFragment, title: String) {
        fragments.add(fragment)
        fragmentsTitle.add(title)
    }
}

在MainActivity设置中ViewPager：

private fun setupViewPager(viewPager: ViewPager, tabLayout: TabLayout,
                               fragmentManager: FragmentManager, ctx: Context): ViewPagerAdapter {
    val adapter = ViewPagerAdapter(fragmentManager, tabLayout, ctx)
    viewPager.adapter = adapter
    tabLayout.setupWithViewPager(viewPager)

    return adapter
}

但是当我删除标签时，我的片段不会被删除。我也可以滚动到上一个片段

Answer 1

通过覆盖getItemPosition()

解决了问题

override fun getItemPosition(obj: Any): Int {
    return PagerAdapter.POSITION_NONE
}