[Hilt]java.lang.reflect.InvocationTargetException

I encountered an error using hilt.

When I use @AndroidEntryPoint to annotate Fragment, it will cause a reflection error in my BaseFragment. When I don’t use @AndroidEntryPoint, the app can work normally. I tried many methods, but failed to fix this error.

---

Class

LoginActivity.kt

@AndroidEntryPoint
class LoginRegisterActivity : BaseActivity<ActivityLoginBinding, LoginRegisterViewModel>() {
    override var hasAutoAddBaseLayout: Boolean = false
}

LoginFragment.kt

@AndroidEntryPoint
class LoginFragment : BaseFragment<FragmentLoginBinding, LoginRegisterViewModel>() {
        ......
}

BaseFragment.class and BaseActivity.kt

abstract class BaseFragment<out VB : ViewBinding, out VM : BaseViewModel> : Fragment(), IWindow,ILauncher by LauncherImpl(),
    ViewBindModelImpl<VB, VM> {
        
        ......
        private var container: ViewGroup? = null
        protected val viewBinding: VB by lazy { declaredViewBind(layoutInflater, container) }
        
        ......
}
        

ViewBindModelImpl.kt

interface ViewBindModelImpl<out VB : ViewBinding, out VM : BaseViewModel> {

    /**
     * view binding
     */
    @Suppress("UNCHECKED_CAST")
    fun declaredViewBind(
        layoutInflater: LayoutInflater,
        container: ViewGroup? = null
    ): VB {
        val type = javaClass.genericSuperclass as ParameterizedType
        val aClass = type.actualTypeArguments[0] as Class<VB>
        if (aClass.name == EmptyViewBinding.javaClass.name) {
            return EmptyViewBinding as VB
        }
        val method = aClass.getDeclaredMethod(
            "inflate",
            LayoutInflater::class.java,
            ViewGroup::class.java,
            Boolean::class.java
        )
        return method.invoke(null, layoutInflater, container, false) as VB
    }
    
    ......
    
}

---

Error logs

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.xxx.xxx.debug, PID: 30602
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxx.xxx.debug/com.xxx.xxx.ui.activities.LoginRegisterActivity}: java.lang.reflect.InvocationTargetException
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3449)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7656)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at com.xxx.xxx.ui.base.impl.ViewBindModelImpl$DefaultImpls.declaredViewBind(ViewBindModelImpl.kt:49)
        at com.xxx.xxx.ui.base.BaseActivity.declaredViewBind(BaseActivity.kt:30)
        at com.xxx.xxx.ui.base.impl.ViewBindModelImpl$DefaultImpls.declaredViewBind$default(ViewBindModelImpl.kt:34)
        at com.xxx.xxx.ui.base.BaseActivity$viewBinding$2.invoke(BaseActivity.kt:46)
        at com.xxx.xxx.ui.base.BaseActivity$viewBinding$2.invoke(BaseActivity.kt:30)
        at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
        at com.xxx.xxx.ui.base.BaseActivity.getViewBinding(Unknown Source:2)
        at com.xxx.xxx.ui.base.BaseActivity.onCreate(BaseActivity.kt:74)
        at com.xxx.xxx.ui.activities.Hilt_LoginRegisterActivity.onCreate(Hilt_LoginRegisterActivity.java:29)
        at android.app.Activity.performCreate(Activity.java:8000)
        at android.app.Activity.performCreate(Activity.java:7984)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:223) 
        at android.app.ActivityThread.main(ActivityThread.java:7656) 
        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) 
     Caused by: java.lang.LinkageError: Method androidx.fragment.app.FragmentActivity com.xxx.xxx.ui.fragments.login.Hilt_LoginFragment.getActivity() overrides final method in class Landroidx/fragment/app/Fragment; (declaration of 'com.xxx.xxx.ui.fragments.login.Hilt_LoginFragment' appears in /data/app/~~Wk0--XoONsDW7ic00Sns-Q==/com.xxx.xxx.debug--TiGFUQanOEnNBUy2b4GTQ==/base.apk!classes2.dex)
        at java.lang.Class.classForName(Native Method)
        at java.lang.Class.forName(Class.java:454)
        at androidx.fragment.app.FragmentFactory.loadClass(FragmentFactory.java:47)
        at androidx.fragment.app.FragmentFactory.loadFragmentClass(FragmentFactory.java:88)
        at androidx.fragment.app.Fragment.instantiate(Fragment.java:595)
        at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer.java:57)
        at androidx.fragment.app.FragmentManager$3.instantiate(FragmentManager.java:483)
        at androidx.navigation.fragment.FragmentNavigator.instantiateFragment(FragmentNavigator.java:132)
        at androidx.navigation.fragment.FragmentNavigator.navigate(FragmentNavigator.java:162)
        at androidx.navigation.fragment.FragmentNavigator.navigate(FragmentNavigator.java:58)
        at androidx.navigation.NavGraphNavigator.navigate(NavGraphNavigator.java:71)
        at androidx.navigation.NavGraphNavigator.navigate(NavGraphNavigator.java:28)
        at androidx.navigation.NavController.navigate(NavController.java:1057)
        at androidx.navigation.NavController.onGraphCreated(NavController.java:637)
        at androidx.navigation.NavController.setGraph(NavController.java:590)
        at androidx.navigation.NavController.setGraph(NavController.java:555)
        at androidx.navigation.NavController.setGraph(NavController.java:537)
2021-01-08 00:26:55.090 30602-30602/com.xxx.xxx.debug E/AndroidRuntime:     at androidx.navigation.fragment.NavHostFragment.onCreate(NavHostFragment.java:248)
        at androidx.fragment.app.Fragment.performCreate(Fragment.java:2921)
        at androidx.fragment.app.FragmentStateManager.create(FragmentStateManager.java:496)
        at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:272)
        at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2173)
        at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2089)
        at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1954)
        at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:306)
        at androidx.fragment.app.FragmentContainerView.<init>(FragmentContainerView.java:166)
        at androidx.fragment.app.FragmentLayoutInflaterFactory.onCreateView(FragmentLayoutInflaterFactory.java:51)
        at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:135)
        at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:313)
        at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:292)
        at android.view.LayoutInflater.tryCreateView(LayoutInflater.java:1067)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:995)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:959)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:657)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:532)
        at com.xxx.xxx.databinding.ActivityLoginBinding.inflate(ActivityLoginBinding.java:42)
        	... 25 more
2021-01-08 00:26:55.156 30602-30602/com.xxx.xxx.debug I/Process: Sending signal. PID: 30602 SIG: 9

---

I also saw other issue try to use, but to no effect, such as

kapt 'com.squareup:javapoet:1.13.0'

My current module reference：

Android Studio 4.1.1 Build #AI-201.8743.12.41.6953283, built on November 5, 2020 Runtime version: 1.8.0_242-release-1644-b01 amd64 VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o Windows 10 10.0

ext {
       hilt_version = '2.30.1-alpha'
       hilt_view_model_version = '1.0.0-alpha02'
}

hiltAndroidKapt = "com.google.dagger:hilt-android-compiler:$hilt_version"
hiltCompilerKapt = "androidx.hilt:hilt-compiler:$hilt_view_model_version"

hiltAndroid = "com.google.dagger:hilt-android:$hilt_version"
hiltViewModel = "androidx.hilt:hilt-lifecycle-viewmodel:$hilt_view_model_version"

---

Extremely grateful!

[TxcA]

Hmm, yeah something sounds very off here. Is there any way for you to put together a repro example for us to look into?

I found the problem when writing the example!

In fact, the problem occurred in another ILauncher class of mine, this is an interface that uses registerForActivityResult. In order to bind the fragment and the lifecycle of the Activity, the activity or fragment is passed in. And there are two fields named activity and fragment in this interface. When BaseActivity and BaseFragment implement ILauncher interfaces, it will cause getActivity() to be rewritten (Kotlin will automatically rewrite get/set).

After I renamed var activity to var activityInside and var fragment to var fragmentInside, this problem was solved. But I still haven’t figured out why the problem was exposed after using @AndroidEntryPoint, when the @AndroidEntryPoint annotation is not use, the App can work normally.

class LauncherImpl : ILauncher, LifecycleEventObserver {
    // This leads to override getActivity(),this is a hidden bug,i have renamed and fixed it.
    override var activity: BaseActivity<*, *>? = null
    override var fragment: BaseFragment<*, *>? = null

    override lateinit var activityLauncher: ActivityResultLauncher<Intent>
    override val activityResultCallback: Deque<(ActivityResult) -> Unit> = ArrayDeque()

    override fun onStateChanged(source: LifecycleOwner, event: Lifecycle.Event) {
        if (event == Lifecycle.Event.ON_CREATE) {
            activity?.registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
                activityResultCallback.pop()?.invoke(result)
            }?.apply { activityLauncher = this }

            fragment?.registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
                activityResultCallback.pop()?.invoke(result)
            }?.apply { activityLauncher = this }

        } else if (event == Lifecycle.Event.ON_DESTROY) {
            activity?.lifecycle?.removeObserver(this)
            fragment?.lifecycle?.removeObserver(this)
        }
    }

    override fun bindLauncherActivity(activity: BaseActivity<*, *>) {
        this.activity = activity
        this.activity?.lifecycle?.addObserver(this)
    }

    override fun bindLauncherFragment(fragment: BaseFragment<*, *>) {
        this.fragment = fragment
        this.fragment?.lifecycle?.addObserver(this)
    }
......
}

Thanks again @bcorso

[bcorso]

Hmm, yeah something sounds very off here. Is there any way for you to put together a repro example for us to look into?