我在活動中有一個父片段，在父片段中有一個子片段。兩個 Fragment 的 NavGraphs 是不同的。我想從Child Fragment訪問Parent Fragment中的函式，但是應用程式崩潰了。我該怎么做？
子片段：
class ProfilinMenu : Fragment(){
private var _binding : FragmentProfilinMenuBinding? = null
private val profilinmenubinding get() = _binding!!
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,savedInstanceState: Bundle?): View {
_binding = FragmentProfilinMenuBinding.inflate(inflater,container,false)
(parentFragment as Parent).changeName() // this is for access parent
return profilinmenubinding.root
}}
父片段：
public class Parent : Fragment() {
private var _binding : FragmentParentBinding? = null
private val parentBinding get() = _binding!!
private var instance: Parent? = null
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
_binding = FragmentParentBinding.inflate(inflater, container, false)
val view = parentBinding.root
return view
}
public fun changeName(){
parentBinding.profilinIsmin.text = "Merhaba"
}
uj5u.com熱心網友回復：
試試這個..
NavHostFragment navHostFragment = (NavHostFragment) getParentFragment();
ParentFragment parent = (ParentFragment) navHostFragment.getParentFragment();
parent.changeName()
轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/417825.html
標籤：
上一篇：底部床單在活動中沒有膨脹