<分区>
class DataFragment : Fragment() {
private var _binding: FragmentDataBinding? = null
private val binding get() = _binding!!
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val adapter = MyViewPagerAdapter(supportFragmentManager)
adapter.addFragment(DataFragment(), "Günlük")
adapter.addFragment(Data2Fragment(), "Aylık")
adapter.addFragment(Data3Fragment(), "Yıllık")
viewPager.adapter = adapter
tabs.setupWithViewPager(viewPager)
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
_binding = FragmentDataBinding.inflate(inflater, container, false)
val view = binding.root
return view
}
我设计了一个 tabLayout 并将其放在名为 DataFragment 的 fragment 中。我打开了名为 daily、monthly、yearly 的不同 fragment ，并将其添加到代码中。但是我不能在这里定义 supportFragmentManager 。它给出了 Unresolved 引用错误。
class MyViewPagerAdapter(manager: FragmentManager) : FragmentPagerAdapter(manager) {
private val fragmentList: MutableList<Fragment> = ArrayList()
private val titleList: MutableList<String> = ArrayList()
override fun getItem(position: Int): Fragment {
return fragmentList[position]
}
override fun getCount(): Int {
return fragmentList.size
}
fun addFragment(fragment: Fragment, title: String) {
fragmentList.add(fragment)
titleList.add(title)
}
override fun getPageTitle(position: Int): CharSequence? {
return titleList[position]
}
下面是我定义的适配器的代码。