4

我在BottomSheetDialogFragmet() 中使用ViewModel,所以我必须用@AndroidEntryPoint 标记我的BottomSheet。

@AndroidEntryPoint
class SearchAddressDialog : BottomSheetDialogFragment() {

    private val viewModel: MyAddressesViewModel by viewModels()
    
    ......
}

但是当我尝试构建我的项目时,它给了我这个错误:

Execution failed for task ':app:kaptDebugKotlin'.
> A failure occurred while executing 
org.jetbrains.kotlin.gradle.internal.KaptWithoutKotlincTask$KaptExecutionWorkAction
> java.lang.reflect.InvocationTargetException (no error message)

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option 
to get more log output. Run with --scan to get full insights.

这是我使用 --stacktrace 运行的输出

https://gist.github.com/javlonrahimov/95de968645cace1dfb6e425381f8014b

如果我删除我的 BottomSheetFragmen() 上方的 @AndroidEntryPoint,它正在构建和安装应用程序。但是当我尝试打开 bottomSheet 时,应用程序崩溃了,因为我将存储库注入到 ViewModel:

java.lang.RuntimeException: Cannot create an instance of class uz.unical.other.ui.my_addresses.view_model.MyAddressesViewModel
    at androidx.lifecycle.ViewModelProvider$NewInstanceFactory.create(ViewModelProvider.java:221)
    at androidx.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.java:278)
    at androidx.lifecycle.SavedStateViewModelFactory.create(SavedStateViewModelFactory.java:112)
    at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:185)
    at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:150)
    at androidx.lifecycle.ViewModelLazy.getValue(ViewModelProvider.kt:54)
    at androidx.lifecycle.ViewModelLazy.getValue(ViewModelProvider.kt:41)
    at uz.unical.other.ui.my_addresses.dialogs.SearchAddressDialog.getViewModel(SearchAddressDialog.kt:26)
    at uz.unical.other.ui.my_addresses.dialogs.SearchAddressDialog.onResume(SearchAddressDialog.kt:86)
    at androidx.fragment.app.Fragment.performResume(Fragment.java:3039)
    at androidx.fragment.app.FragmentStateManager.resume(FragmentStateManager.java:607)
    at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:306)
    at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2189)
    at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2100)
    at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:2002)
    at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:524)
    at android.os.Handler.handleCallback(Handler.java:938)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:246)
    at android.app.ActivityThread.main(ActivityThread.java:8528)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
 Caused by: java.lang.InstantiationException: java.lang.Class<uz.unical.other.ui.my_addresses.view_model.MyAddressesViewModel> has no zero argument constructor
    at java.lang.Class.newInstance(Native Method)
    at androidx.lifecycle.ViewModelProvider$NewInstanceFactory.create(ViewModelProvider.java:219)
    at androidx.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.java:278) 
    at androidx.lifecycle.SavedStateViewModelFactory.create(SavedStateViewModelFactory.java:112) 
    at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:185) 
    at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:150) 
    at androidx.lifecycle.ViewModelLazy.getValue(ViewModelProvider.kt:54) 
    at androidx.lifecycle.ViewModelLazy.getValue(ViewModelProvider.kt:41) 
    at uz.unical.other.ui.my_addresses.dialogs.SearchAddressDialog.getViewModel(SearchAddressDialog.kt:26) 
    at uz.unical.other.ui.my_addresses.dialogs.SearchAddressDialog.onResume(SearchAddressDialog.kt:86) 
    at androidx.fragment.app.Fragment.performResume(Fragment.java:3039) 
    at androidx.fragment.app.FragmentStateManager.resume(FragmentStateManager.java:607) 
    at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:306) 
    at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2189) 
    at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2100) 
    at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:2002) 
    at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:524) 
    at android.os.Handler.handleCallback(Handler.java:938) 
    at android.os.Handler.dispatchMessage(Handler.java:99) 
    at android.os.Looper.loop(Looper.java:246) 
    at android.app.ActivityThread.main(ActivityThread.java:8528) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130) 

@AndroidEntryPoint在其他普通片段上正常工作。

更新:

这是我的视图模型:

@HiltViewModel
class MyAddressesViewModel @Inject constructor(
   private val repository: AddressRepository,
   private val geocoderRepository: GeocoderRepository
) : ViewModel() {}

更新 2:现在我正在注释 BottomSheetDialogFragment(),它在构建时给了我错误。

如果我改变这个

@AndroidEntryPoint
class SearchAddressDialog : BottomSheetDialogFragment(){

对此

@AndroidEntryPoint
class SearchAddressDialog : Fragment() {

它工作得很好。

我真的可以用@AndroidEntryPoint 注释BottomSheetDialogFragment() 吗?

更新 3:

这是我的 BottomSheetDialogFragment

4

4 回答 4

1

经过长时间的研究,我无法解决@AndroidEntryPoint 问题。我想出了这个:我只是将我的 ViewModel 传递给它的构造函数上的 BottomSheetDialogFragment:

class SearchAddressDialog(
    private val viewModel: MyAddressesViewModel
) : BottomSheetDialogFragment() {
    ........ 
}

我像这样打开了我的对话框:

val dialog = SearchAddressDialog(viewModel)
dialog.show(childFragmentManager, SearchAddressDialog.TAG)

我使用了当前片段的 ViewModel。

于 2021-10-02T16:36:09.830 回答
0

您是否在和类构造函数上添加了@Inject注释?也许您忘记注释 ViewModel 类的依赖对象的构造函数。因为它 Hilt/Dagger 无法解析依赖树。
AddressRepositoryGeocoderRepository

如果是这种情况,使用@Inject问题注释所有依赖类构造函数将得到解决。

于 2021-09-29T22:33:21.870 回答
0

首先,我希望你hilt-android-gradle-plugin在你的项目中添加。

其次,dagger-hilt 很久以前就存在关于这种继承依赖的问题,但自 2.28 以来已经修复。您可以在此链接中查看更多详细信息。https://github.com/google/dagger/issues/1910

那么,对于您的情况,不添加@AndroidEntryPointtoBottomSheetDialogFragment应该可以工作,但您是否也尝试过添加这个?它是这样工作的吗?

另外,您能分享一下您的 BottomSheetDialogFragment 课程吗?

于 2021-10-02T10:58:42.530 回答
-1

从文档中:

Hilt 仅支持扩展 androidx.Fragment 的片段。

于 2021-09-30T05:12:08.683 回答