Android NavHostFragment（片段）膨胀失败，ViewBinding（使用导航组件）
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【中文标题】Android NavHostFragment（片段）膨胀失败，ViewBinding（使用导航组件）【英文标题】：Android NavHostFragment (fragment) inflation failed with ViewBinding (Using navigation component) 【发布时间】：2021-12-01 17:27:03 【问题描述】：目前，我正在将我的应用程序从 Kotlin Synthetic 迁移到 ViewBinding。我按照迁移指南进行了所有更改，但在迁移 OnboardingActivity 之后。当我启动 OnboardingActivity 时，该应用程序崩溃了。我做了谷歌来弄清楚这里缺少什么，但到目前为止我没有任何运气。
崩溃日志：
2021-10-13 12:59:52.057 32296-32296/dev.bipin.sample E/androidRuntime: FATAL EXCEPTION: main
Process: dev.bipin.sample, PID: 32296
java.lang.RuntimeException: Unable to start activity ComponentInfodev.bipin.sample/com.hammr.ui.onboarding.OnboardingActivity: android.view.InflateException: Binary XML file line #19 in dev.bipin.sample:layout/activity_onboarding: Binary XML file line #19 in dev.bipin.sample:layout/activity_onboarding: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3271)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3410)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2017)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7397)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)
Caused by: android.view.InflateException: Binary XML file line #19 in dev.bipin.sample:layout/activity_onboarding: Binary XML file line #19 in dev.bipin.sample:layout/activity_onboarding: Error inflating class fragment
Caused by: android.view.InflateException: Binary XML file line #19 in dev.bipin.sample:layout/activity_onboarding: Error inflating class fragment
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context androidx.fragment.app.FragmentHostCallback.getContext()' on a null object reference
at androidx.fragment.app.FragmentManager$3.instantiate(FragmentManager.java:483)
at androidx.fragment.app.FragmentLayoutInflaterFactory.onCreateView(FragmentLayoutInflaterFactory.java:94)
at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:135)
at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:319)
at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:298)
at android.view.LayoutInflater.tryCreateView(LayoutInflater.java:1069)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:997)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:961)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1123)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1084)
at android.view.LayoutInflater.inflate(LayoutInflater.java:682)
at android.view.LayoutInflater.inflate(LayoutInflater.java:534)
at com.hammr.databinding.ActivityOnboardingBinding.inflate(ActivityOnboardingBinding.java:82)
at com.hammr.databinding.ActivityOnboardingBinding.inflate(ActivityOnboardingBinding.java:76)
at com.hammr.di.module.ui.ViewBindingModule.onboardingActivityBinding(ViewBindingModule.kt:20)
at com.hammr.di.module.ui.ViewBindingModule_OnboardingActivityBindingFactory.onboardingActivityBinding(ViewBindingModule_OnboardingActivityBindingFactory.java:37)
at com.hammr.di.component.DaggerAppComponent$OnboardingActivitySubcomponentImpl.getActivityOnboardingBinding(DaggerAppComponent.java:669)
at com.hammr.di.component.DaggerAppComponent$OnboardingActivitySubcomponentImpl.injectOnboardingActivity(DaggerAppComponent.java:1053)
at com.hammr.di.component.DaggerAppComponent$OnboardingActivitySubcomponentImpl.inject(DaggerAppComponent.java:1047)
at com.hammr.di.component.DaggerAppComponent$OnboardingActivitySubcomponentImpl.inject(DaggerAppComponent.java:543)
at dagger.android.DispatchingAndroidInjector.maybeInject(DispatchingAndroidInjector.java:113)
at dagger.android.DispatchingAndroidInjector.inject(DispatchingAndroidInjector.java:134)
at dagger.android.AndroidInjection.inject(AndroidInjection.java:181)
2021-10-13 12:59:52.058 32296-32296/dev.bipin.sample E/AndroidRuntime: at dagger.android.AndroidInjection.inject(AndroidInjection.java:55)
at dagger.android.support.DaggerAppCompatActivity.onCreate(DaggerAppCompatActivity.java:52)
at com.hammr.ui.base.ViewBindingBaseActivity.onCreate(ViewBindingBaseActivity.kt:18)
at com.hammr.ui.onboarding.OnboardingActivity.onCreate(OnboardingActivity.kt:29)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1300)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3246)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3410)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2017)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7397)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)
布局文件：
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/onboardingRoot"
android:layout_
android:layout_
tools:context=".ui.onboarding.OnboardingActivity">
<fragment
android:id="@+id/navOnboardingHost"
class="androidx.navigation.fragment.NavHostFragment"
android:layout_
android:layout_
app:defaultNavHost="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/onboardingStepTextView"
android:layout_
android:layout_
android:layout_marginTop="@dimen/_16sdp"
android:text="@string/progress_step_count"
android:textColor="@color/onboarding_step_counter_text_color"
android:textSize="@dimen/_10ssp"
app:layout_constraintBottom_toTopOf="@id/onboardingStepProgressIndicator"
app:layout_constraintStart_toEndOf="@id/onboardingVerticalStartGuidelines"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_chainStyle="spread"
tools:text="Step 1 of 4" />
<com.google.android.material.progressindicator.LinearProgressIndicator
android:id="@+id/onboardingStepProgressIndicator"
android:layout_
android:layout_
android:layout_marginTop="@dimen/_6sdp"
android:layout_marginBottom="@dimen/_8sdp"
android:progress="25"
app:indicatorColor="@color/onboarding_step_progress_track_color"
app:layout_constraintStart_toEndOf="@id/onboardingVerticalStartGuidelines"
app:layout_constraintTop_toBottomOf="@id/onboardingStepTextView"
app:layout_constraintVertical_chainStyle="packed"
app:trackColor="@color/onboarding_step_progress_remaining_track_color"
app:trackCornerRadius="@dimen/_16sdp"
app:trackThickness="@dimen/_3sdp" />
<!--- Other UI components -->
</androidx.constraintlayout.widget.ConstraintLayout>
Kotlin 文件：
abstract class ViewBindingBaseActivity<VB : ViewBinding> :
DaggerAppCompatActivity()
@Inject
lateinit var binding: VB
override fun onCreate(savedInstanceState: Bundle?)
super.onCreate(savedInstanceState)
setContentView(binding.root)
// Other codes
class OnboardingActivity : ViewBindingBaseActivity<ActivityOnboardingBinding>()
@Inject
lateinit var onboardingActivityViewModel: OnboardingActivityViewModel
@Inject
lateinit var userProfileViewModel: UserProfileViewModel
// Other code
如果有人提供一些指南或相关参考链接，将不胜感激。
【问题讨论】：
【参考方案1】：如果你想使用 ViewBinding 你应该在你的 xml 文件中包装“
<layout>
<androidx.constraintlayout.widget.ConstraintLayout
....
tools:context=".ui.onboarding.OnboardingActivity">
...
</layout>
【讨论】：
我现在只做 ViewBinding 并且以上是关于Android NavHostFragment（片段）膨胀失败，ViewBinding（使用导航组件）的主要内容，如果未能解决你的问题，请参考以下文章
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