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我在底部导航栏中有 3 个片段

- >第三个片段有一个viewpager2，其中有2个片段。

-> 单击视图分页器片段之一中的按钮会打开一个 BottomSheetDialogFragment，并在完成该 BottomSheetDialogFragment 中的几个步骤后

-> 该片段被解除并打开另一个BottomSheetDialogFragment。

当最后一个 BottomSheetDialogFragment 关闭时，应用程序崩溃并出现以下错误

java.util.NoSuchElementException: Collection contains no element matching the predicate.
        at androidx.navigation.fragment.DialogFragmentNavigator$observer$1.onStateChanged(DialogFragmentNavigator.kt:216)
        at androidx.lifecycle.LifecycleRegistry$ObserverWithState.dispatchEvent(LifecycleRegistry.java:354)
        at androidx.lifecycle.LifecycleRegistry.backwardPass(LifecycleRegistry.java:284)
        at androidx.lifecycle.LifecycleRegistry.sync(LifecycleRegistry.java:302)
        at androidx.lifecycle.LifecycleRegistry.moveToState(LifecycleRegistry.java:148)
        at androidx.lifecycle.LifecycleRegistry.handleLifecycleEvent(LifecycleRegistry.java:134)
        at androidx.fragment.app.Fragment.performStop(Fragment.java:3179)
        at androidx.fragment.app.FragmentStateManager.stop(FragmentStateManager.java:619)
        at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:297)
        at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1793)
        at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1711)
        at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1654)
        at androidx.fragment.app.FragmentManager$4.run(FragmentManager.java:488)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7660)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

一个月前我升级到导航库 2.4.0-alpha03 并忽略了这个问题，认为它在 alpha 中并且会被修复，alpha05 已经出来并且仍然一样，我决定去稳定版本 2.3.5 和错误持续存在。

这是gradle（模块）

apply plugin: "androidx.navigation.safeargs.kotlin"

implementation 'androidx.navigation:navigation-fragment-ktx:2.4.0-alpha05'
implementation 'androidx.navigation:navigation-ui-ktx:2.4.0-alpha05'

分级（模块）

classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.4.0-alpha05"

导航图如下所示

    <fragment
        android:id="@+id/profile"
        android:name="com.example.user.profile.ProfileFragment"
        android:label="Profile"
        tools:layout="@layout/fragment_profile">
        <action
            android:id="@+id/action_profile_to_editProfileFragment"
            app:destination="@id/editProfileFragment"
            app:enterAnim="@anim/from_right"
            app:exitAnim="@anim/to_left"
            app:popEnterAnim="@anim/from_left"
            app:popExitAnim="@anim/to_right" />
        <action
            android:id="@+id/action_profile_to_predefinedHabitsFragment"
            app:destination="@id/predefinedHabitsFragment" />
        <action
            android:id="@+id/action_profile_to_editHabitBottomSheetFragment"
            app:destination="@id/editHabitBottomSheetFragment" />

    </fragment>

    <dialog
        android:id="@+id/addPredefinedHabitBottomSheet"
        android:name="com.example.habits.add.predefined.AddPredefinedHabitBottomSheet"
        android:label="AddPredefinedHabitBottomSheet"
        tools:layout="@layout/add_predefined_habit_bottom_sheet">
        <argument
            android:name="habitData"
            app:argType="com.example.predefined.models.PredefinedHabitsModelItem" />
    </dialog>

    <dialog
        android:id="@+id/addCustomHabitBottomSheet"
        android:name="com.iku.habits.add.custom.AddCustomHabitBottomSheet"
        android:label="AddCustomHabitBottomSheet"
        tools:layout="@layout/add_custom_habit_bottom_sheet" />
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1 回答 1

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谷歌问题上描述的解决方案 - https://issuetracker.google.com/issues/191073055#comment14

于 2021-09-29T22:01:33.730 回答