kotlin fragment oncreateview
Kotlin synthetic properties are not magic and work in a very simple way. When you access btn_K , it calls for getView().findViewById(R.id.btn_K) . The problem is that you are accessing it too soon. getView() returns null in onCreateView . Try doing it in, savedInstanceState is nullable, yet you declared it as Bundle - it should be Bundle? . override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? ., All the code after return super.onCreateView(inflater, container, savedInstanceState). is unreachable. Just read IDE warnings. Also, layout becomes attached only if you returned it from onCreateView , i. e. return inflater.inflate(...) ., Add. apply plugin: 'kotlin-android-extensions'. in the app level gradle file and. import import kotlinx.android.synthetic.main.fragment_your_fragment_name.view.*. in in the onCreateView of your fragment (eg if id of your textview is textView ) ov, I've written a custom view for displaying events in a 24 hour vertical scroll timeline. In the onCreateView method in the fragment that inflates this view, I am inflating the view and then trying to set callbacks which are exposed by the view. Howeve, The Fragment class does not inflate the layout directly – it has property view: View? which holds it. This should be pretty obvious since it is created with onCreateView . In order to access the properties within the view you have to set the import impor, class frSetting : Fragment() lateinit var swSplash : Switch override fun onCreate(savInsState: Bundle?) super.onCreate(savInsState) } override fun onAttach(context: Context?) super.onAttach(context) } override fun onDetach() super.onDetach() } overri, onCreate : When a new fragment instance initializes, which always happens after it attaches to the host — fragments are a bit like viruses. onCreateView : When a fragment creates its portion of the view hierarchy, which is added to its activity's vie, From the resulting menu, select the New -> Kotlin File/Class option. Name the fragment TextFragment, change the Kind menu to Class and click OK to create the class. As3.0 fragment layout 2.png. Edit the new TextFragment.kt class file and modify it to
| 相關軟體 Android Studio 資訊 | |
|---|---|
 kotlin fragment oncreateview 相關參考資料
Kotlin Android Extensions and Fragments - Stack Overflow
Kotlin synthetic properties are not magic and work in a very simple way. When you access btn_K , it calls for getView().findViewById(R.id.btn_K) . The problem is that you are accessing it too soon. g... https://stackoverflow.com android - How to use fragments with kotlin - Stack Overflow
savedInstanceState is nullable, yet you declared it as Bundle - it should be Bundle? . override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? . https://stackoverflow.com android - Kotlin Fragment - Stack Overflow
All the code after return super.onCreateView(inflater, container, savedInstanceState). is unreachable. Just read IDE warnings. Also, layout becomes attached only if you returned it from onCreateView ... https://stackoverflow.com How to fetch resource id in fragment using kotlin in android ...
Add. apply plugin: 'kotlin-android-extensions'. in the app level gradle file and. import import kotlinx.android.synthetic.main.fragment_your_fragment_name.view.*. in in the onCreateView of yo... https://stackoverflow.com kotlin - View is null in onCreateView android - Stack Overflow
I've written a custom view for displaying events in a 24 hour vertical scroll timeline. In the onCreateView method in the fragment that inflates this view, I am inflating the view and then trying... https://stackoverflow.com Kotlin Android extensions and retained fragment - Stack Overflow
The Fragment class does not inflate the layout directly – it has property view: View? which holds it. This should be pretty obvious since it is created with onCreateView . In order to access the prop... https://stackoverflow.com Strange initializing of fields in Fragments XML - Kotlin Discussions
class frSetting : Fragment() lateinit var swSplash : Switch override fun onCreate(savInsState: Bundle?) super.onCreate(savInsState) } override fun onAttach(context: Context?) super.onAttach(contex... https://discuss.kotlinlang.org Android Fragments Tutorial: An Introduction with Kotlin - Ray Wenderlich
onCreate : When a new fragment instance initializes, which always happens after it attaches to the host — fragments are a bit like viruses. onCreateView : When a fragment creates its portion of the v... https://www.raywenderlich.com Using Fragments in Android Studio - A Kotlin Example - Techotopia
From the resulting menu, select the New -> Kotlin File/Class option. Name the fragment TextFragment, change the Kind menu to Class and click OK to create the class. As3.0 fragment layout 2.png. Ed... https://www.techotopia.com |