我开始在工作中使用动态功能模块，并且遇到了一些问题：
DFM之间的导航在实现登录功能时，我尝试按照条件导航中的文档进行操作，但在这些示例中，这些片段使用相同的视图模型进行通信。由于Login，Menu和Ricerca Strutture都是DFM，它们无法直接通信，因此我尝试了以下操作：
在应用模块中：
import androidx.lifecycle.MutableLiveData
object AuthState{
val authState = MutableLiveData<Int>()
}
在登录模块中：
internal class LoginViewModel(private val loginUseCase: LoginUseCase) :
BaseViewModel<LoginViewModel.ViewState, LoginViewModel.Action>(ViewState()) {
enum class AuthenticationState{
UNAUTHENTICATED, //0
AUTHENTICATED, //1
INVALID_AUTHENTICATION //2
}
private val _authenticationState = AuthState.authState
init {
AuthState.authState.value = 0 //user is always unathenticaticated when activity is launched
}
fun checkAuth():AuthenticationState {
return when(_authenticationState.value) {
0 -> AuthenticationState.UNAUTHENTICATED
1 -> AuthenticationState.AUTHENTICATED
2 -> AuthenticationState.INVALID_AUTHENTICATION
else -> AuthenticationState.UNAUTHENTICATED
}
}
class LoginFragment : BaseContainerFragment() {
private val viewModel: LoginViewModel by instance()
override val layoutResourceId = R.layout.fragment_login
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val navController = findNavController()
viewModel.authenticationState.observe(viewLifecycleOwner, Observer {
when(viewModel.checkAuth()){
LoginViewModel.AuthenticationState.AUTHENTICATED -> navController.popBackStack()
LoginViewModel.AuthenticationState.INVALID_AUTHENTICATION -> Timber.d("Invalid
Authentication")
LoginViewModel.AuthenticationState.UNAUTHENTICATED -> Timber.d("Unauthentication")
}
})
}
在Ricerca Strutture模块中（如果已通过用户身份验证，请显示此片段）
class RicercaStruttureFragment : BaseContainerFragment() {
override val layoutResourceId = R.layout.fragment_ricerca_strutture
private val viewModel: RicercaStruttureViewModel by instance()
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val navController = findNavController()
viewModel.authenticationState.observe(viewLifecycleOwner, Observer {
when(viewModel.checkAuth()){
RicercaStruttureViewModel.AuthenticationState.AUTHENTICATED -> Timber.d("Authenticated")
RicercaStruttureViewModel.AuthenticationState.INVALID_AUTHENTICATION -> Timber.d("Invalid Authentication")
RicercaStruttureViewModel.AuthenticationState.UNAUTHENTICATED -> navController.navigate(R.id.action_ricercaStruttureFragment_to_login_nav_graph)
}
})
}
}
internal class RicercaStruttureViewModel():
BaseViewModel<RicercaStruttureViewModel.ViewState, RicercaStruttureViewModel.Action>(ViewState()) {
enum class AuthenticationState{
UNAUTHENTICATED, //0
AUTHENTICATED, //1
INVALID_AUTHENTICATION //2
}
private val _authenticationState = AuthState.authState
val authenticationState: LiveData<Int> = _authenticationState
fun checkAuth():AuthenticationState {
return when(authenticationState.value) {
0 -> AuthenticationState.UNAUTHENTICATED
1 -> AuthenticationState.AUTHENTICATED
2 -> AuthenticationState.INVALID_AUTHENTICATION
else -> AuthenticationState.UNAUTHENTICATED
}
}
}
这样，我在应用程序模块中有了一个Singleton，它将其值更新为所有观察/修改它的模块，这些模块应该没有任何问题，问题是我遇到了编译错误：无法解析的引用：action_ricercaStruttureFragment_to_login_nav_graph。 （下面的stacktrace）
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':module_feature_ricerca_strutture:compileCollaudoMetasaluteDebugKotlin'.
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept(ExecuteActionsTaskExecuter.java:166)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept(ExecuteActionsTaskExecuter.java:163)
at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:191)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:156)
at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:62)
at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:108)
at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionOutputsTaskExecuter.execute(ResolveBeforeExecutionOutputsTaskExecuter.java:67)
at org.gradle.api.internal.tasks.execution.StartSnapshotTaskInputsBuildOperationTaskExecuter.execute(StartSnapshotTaskInputsBuildOperationTaskExecuter.java:62)
at org.gradle.api.internal.tasks.execution.ResolveAfterPreviousExecutionStateTaskExecuter.execute(ResolveAfterPreviousExecutionStateTaskExecuter.java:46)
at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:94)
at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:95)
at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)
at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:77)
at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:55)
at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)
at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:52)
at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:43)
at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:355)
at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:343)
at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:336)
at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:322)
at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:134)
at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:129)
at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:202)
at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:193)
at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:129)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
Caused by: org.gradle.api.GradleException: Compilation error. See log for more details
at org.jetbrains.kotlin.gradle.tasks.TasksUtilsKt.throwGradleExceptionIfError(tasksUtils.kt:14)
at org.jetbrains.kotlin.compilerRunner.GradleKotlinCompilerWork.run(GradleKotlinCompilerWork.kt:122)
at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.runCompilerAsync(GradleKotlinCompilerRunner.kt:146)
at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.runCompilerAsync(GradleKotlinCompilerRunner.kt:141)
at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.runJvmCompilerAsync(GradleKotlinCompilerRunner.kt:81)
at org.jetbrains.kotlin.gradle.tasks.KotlinCompile.callCompilerAsync$kotlin_gradle_plugin(Tasks.kt:449)
at org.jetbrains.kotlin.gradle.tasks.KotlinCompile.callCompilerAsync$kotlin_gradle_plugin(Tasks.kt:359)
at org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile.executeImpl(Tasks.kt:316)
at org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile.execute(Tasks.kt:288)
at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:103)
at org.gradle.api.internal.project.taskfactory.IncrementalTaskInputsTaskAction.doExecute(IncrementalTaskInputsTaskAction.java:47)
at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:42)
at org.gradle.api.internal.project.taskfactory.AbstractIncrementalTaskAction.execute(AbstractIncrementalTaskAction.java:25)
at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:28)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$5.run(ExecuteActionsTaskExecuter.java:476)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:402)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:394)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:92)
at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:461)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:444)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.access$200(ExecuteActionsTaskExecuter.java:93)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.execute(ExecuteActionsTaskExecuter.java:237)
at org.gradle.internal.execution.steps.ExecuteStep.lambda$execute$0(ExecuteStep.java:32)
at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:32)
at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:26)
at org.gradle.internal.execution.steps.CleanupOutputsStep.execute(CleanupOutputsStep.java:58)
at org.gradle.internal.execution.steps.CleanupOutputsStep.execute(CleanupOutputsStep.java:35)
at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:48)
at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:33)
at org.gradle.internal.execution.steps.CancelExecutionStep.execute(CancelExecutionStep.java:39)
at org.gradle.internal.execution.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:73)
at org.gradle.internal.execution.steps.TimeoutStep.execute(TimeoutStep.java:54)
at org.gradle.internal.execution.steps.CatchExceptionStep.execute(CatchExceptionStep.java:35)
at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:51)
at org.gradle.internal.execution.steps.SnapshotOutputsStep.execute(SnapshotOutputsStep.java:45)
at org.gradle.internal.execution.steps.SnapshotOutputsStep.execute(SnapshotOutputsStep.java:31)
at org.gradle.internal.execution.steps.CacheStep.executeWithoutCache(CacheStep.java:208)
at org.gradle.internal.execution.steps.CacheStep.executeAndStoreInCache(CacheStep.java:187)
at org.gradle.internal.execution.steps.CacheStep.lambda$executeWithCache$2(CacheStep.java:110)
at org.gradle.internal.execution.steps.CacheStep.lambda$executeWithCache$3(CacheStep.java:110)
at org.gradle.internal.Try$1.apply(Try.java:59)
at org.gradle.internal.Try$1.apply(Try.java:56)
at org.gradle.internal.Try$Success.flatMap(Try.java:102)
at org.gradle.internal.Try.map(Try.java:56)
at org.gradle.internal.execution.steps.CacheStep.executeWithCache(CacheStep.java:79)
at org.gradle.internal.execution.steps.CacheStep.execute(CacheStep.java:69)
at org.gradle.internal.execution.steps.CacheStep.execute(CacheStep.java:45)
at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:49)
at org.gradle.internal.execution.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:43)
at org.gradle.internal.execution.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:32)
at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:38)
at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:24)
at org.gradle.internal.execution.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:96)
at org.gradle.internal.execution.steps.SkipUpToDateStep.lambda$execute$0(SkipUpToDateStep.java:89)
at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:54)
at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:38)
at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:76)
at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:37)
at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:36)
at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:26)
at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:90)
at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:48)
at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:69)
at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:47)
at org.gradle.internal.execution.impl.DefaultWorkExecutor.execute(DefaultWorkExecutor.java:33)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:140)
... 35 more
我所有的导航图都在App模块中，而我在网上找到的替代方法是：
使用新的导航组件2.3.x，我们可以正确地使用动态功能模块（DynamicNavHostFragment + <include-dynamic...标签）检查此项目的具体实现https://github.com/igorwojda/android-showcase