Not available with Hilt

[kaki2015]

I want to use your library with together the hilt(DI Library). But, I encountered an error Unable to instantiate application com.example.myapplication.MainApplication. Doesn't recognize the Application Class(MainApplication) when building. please help me, thx.

Reproduction

1. Create a new Project with defalt.(Empty Compose Activity)

2. Add the settings at build.gradle (Project: My_Application).

   buildscript {
   
   // Add the following
   repositories {
       google()
       maven { url "https://plugins.gradle.org/m2/" }
       mavenCentral()
   }
   dependencies {
       classpath 'com.google.dagger:hilt-android-gradle-plugin:2.40.1'
       classpath 'org.aspectj:aspectjtools:1.9.6'
       classpath 'com.ibotta:plugin:1.2.0'
   }

3. Add the settings at build.gradle (Module: My_Application.app).

   plugins {
   // Add the following
   id 'kotlin-kapt'
   id 'dagger.hilt.android.plugin'
   id 'com.ibotta.gradle.aop'
   }

   Add the implementations.

   // aspectj
   implementation 'org.aspectj:aspectjrt:1.9.6'
   // Hilt
   implementation 'com.google.dagger:hilt-android:2.40.1'
   kapt 'com.google.dagger:hilt-android-compiler:2.40.1'
   implementation 'androidx.hilt:hilt-navigation-compose:1.0.0'

4. Create the Application Class.

   class MainApplication : Application()

   Add android:name="com.example.myapplication.MainApplication" at AndroidManifest.xml.

   <?xml version="1.0" encoding="utf-8"?>
   <manifest xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   package="com.example.aoptestapplication">
   
   <application
       android:name="com.example.myapplication.MainApplication" // add

5. Build OK
6. Add the @HiltAndroidApp

   @HiltAndroidApp // add 
   class MainApplication : Application()

7. Run the app. Unable to instantiate application com.example.myapplication.MainApplication: java.lang.ClassNotFoundException:

   2022-06-23 10:26:09.881 18954-18954/com.example.myapplication E/AndroidRuntime: FATAL EXCEPTION: main
   Process: com.example.myapplication, PID: 18954
   java.lang.RuntimeException: Unable to instantiate application com.example.myapplication.MainApplication: java.lang.ClassNotFoundException: Didn't find class "com.example.myapplication.MainApplication" on path: DexPathList[[zip file "/data/app/com.example.myapplication-ytHMBpWkgDmYGcXCZ6NxFg==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.myapplication-ytHMBpWkgDmYGcXCZ6NxFg==/lib/arm64, /system/lib64, /system/product/lib64]]
       at android.app.LoadedApk.makeApplication(LoadedApk.java:1226)
       at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6431)
       at android.app.ActivityThread.access$1300(ActivityThread.java:219)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1859)
       at android.os.Handler.dispatchMessage(Handler.java:107)
       at android.os.Looper.loop(Looper.java:214)
       at android.app.ActivityThread.main(ActivityThread.java:7356)
       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:930)
    Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.myapplication.MainApplication" on path: DexPathList[[zip file "/data/app/com.example.myapplication-ytHMBpWkgDmYGcXCZ6NxFg==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.myapplication-ytHMBpWkgDmYGcXCZ6NxFg==/lib/arm64, /system/lib64, /system/product/lib64]]
       at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:196)
       at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
       at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
       at android.app.AppComponentFactory.instantiateApplication(AppComponentFactory.java:76)
       at androidx.core.app.CoreComponentFactory.instantiateApplication(CoreComponentFactory.java:52)
       at android.app.Instrumentation.newApplication(Instrumentation.java:1148)
       at android.app.LoadedApk.makeApplication(LoadedApk.java:1218)
       at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6431) 
       at android.app.ActivityThread.access$1300(ActivityThread.java:219) 
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1859) 
       at android.os.Handler.dispatchMessage(Handler.java:107) 
       at android.os.Looper.loop(Looper.java:214) 
       at android.app.ActivityThread.main(ActivityThread.java:7356) 
       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:930) 
       Suppressed: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/example/myapplication/Hilt_MainApplication;
       at java.lang.VMClassLoader.findLoadedClass(Native Method)
       at java.lang.ClassLoader.findLoadedClass(ClassLoader.java:738)
       at java.lang.ClassLoader.loadClass(ClassLoader.java:363)
               ... 14 more
    Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.myapplication.Hilt_MainApplication" on path: DexPathList[[zip file "/data/app/com.example.myapplication-ytHMBpWkgDmYGcXCZ6NxFg==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.myapplication-ytHMBpWkgDmYGcXCZ6NxFg==/lib/arm64, /system/lib64, /system/product/lib64]]
       at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:196)
       at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
       at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
               ... 17 more

[vdelricco]

Thanks for the issue submission @kaki2015, will report back with my findings 👀

[vdelricco]

Hi @kaki2015, in the project you were attempting to add Hilt, could you try adding the following to the project build.gradle file:

hilt {
    enableAggregatingTask = false
    enableExperimentalClasspathAggregation = true
}

In my repro setup, this caused the app to behave properly. This uses a flag which is marked deprecated so there might be some more investigation to be done here but I was wanted to see if it also solves the problem for you.

[Sunar]

@vdelricco I've encountered same error and that setup for Hilt fixed the problem. Thanks!