Hello, everybody, I created an app with Hilt DI, but I'm new at DI. The app works well, but when I r...

# dagger

[Hovhannes]

Hello, everybody, I created an app with Hilt DI, but I'm new at DI. The app works well, but when I remove Hilt's annotations, the app works well again. How is possible? Can Hilt work without its annotations.

[Jeremy]

The app will work, you just need to create and inject the dependencies manually

[Hovhannes]

@Jeremy thanks for replying.  I  clicked  clean && rebuild project, clicked invalidate caches , deleted the app and install it again in my phone, removed some annotations, but there is no result, the app works again. Even the app works when I use wrong annotations. 🤔 I use Hilt DI with Java with only this dependency " implementation 'com.google.daggerhilt android2.37' "

[Jeremy]

Did you enable kapt?

[Jeremy]

Make sure to follow setup instructions incl adding hilt-compiler

[Hovhannes]

I created an app using Navigation Drawer, Data Binding and Hilt DI. But I get non understandable errors. The errors appeared after using Hilt and the errors depend on Hilt DI.
  java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.sportnews/com.example.News.view.activities.MainActivity}: android.view.InflateException: Binary XML file line #16 in com.example.sportnewslayout/activity main Binary XML file line #20 in com.example.sportnewslayout/content main Error inflating class androidx.fragment.app.FragmentContainerView
        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: android.view.InflateException: Binary XML file line #16 in com.example.sportnewslayout/activity main Binary XML file line #20 in com.example.sportnewslayout/content main Error inflating class androidx.fragment.app.FragmentContainerView
     Caused by: android.view.InflateException: Binary XML file line #20 in com.example.sportnewslayout/content main Error inflating class androidx.fragment.app.FragmentContainerView
     Caused by: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment com.example.News.view.fragments.HomeFragment: make sure class name exists
        at androidx.fragment.app.FragmentFactory.loadFragmentClass(FragmentFactory.java:97)
        at androidx.fragment.app.Fragment.instantiate(Fragment.java:611)
        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:1066)
        at androidx.navigation.NavController.onGraphCreated(NavController.java:639)
        at androidx.navigation.NavController.setGraph(NavController.java:592)
        at androidx.navigation.NavController.setGraph(NavController.java:557)
        at androidx.navigation.NavController.setGraph(NavController.java:539)
        at androidx.navigation.fragment.NavHostFragment.onCreate(NavHostFragment.java:248)
        at androidx.fragment.app.Fragment.performCreate(Fragment.java:2949)
        at androidx.fragment.app.FragmentStateManager.create(FragmentStateManager.java:475)
        at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:278)
        at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2189)
        at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2106)
        at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1971)
        at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:311)
        at androidx.fragment.app.FragmentContainerView.<init>(FragmentContainerView.java:180)
        at androidx.fragment.app.FragmentLayoutInflaterFactory.onCreateView(FragmentLayoutInflaterFactory.java:52)
2021-06-29 170640.696 19407-19407/com.example.sportnews E/AndroidRuntime:    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:1067)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:995)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:959)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:1121)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1082)
        at android.view.LayoutInflater.parseInclude(LayoutInflater.java:1261)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:1117)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1082)
        at android.view.LayoutInflater.parseInclude(LayoutInflater.java:1261)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:1117)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1082)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:680)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:532)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
        at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:699)
        at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:195)
        at androidx.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:303)
        at androidx.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:284)
        at com.example.News.view.activities.MainActivity.onCreate(MainActivity.java:45)
        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.ClassNotFoundException: com.example.News.view.fragments.HomeFragment
        at java.lang.Class.classForName(Native Method)
        at java.lang.Class.forName(Class.java:454)
        at androidx.fragment.app.FragmentFactory.loadClass(FragmentFactory.java:53)
        at androidx.fragment.app.FragmentFactory.loadFragmentClass(FragmentFactory.java:94)
         ... 60 more
     Caused by: java.lang.ClassNotFoundException: com.example.News.view.fragments.HomeFragment
        at java.lang.VMClassLoader.findLoadedClass(Native Method)
        at java.lang.ClassLoader.findLoadedClass(ClassLoader.java:738)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:363)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
         ... 64 more
     Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/example/News/view/fragments/Hilt_HomeFragment;
         ... 64 more
     Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.News.view.fragments.Hilt_HomeFragment" on path: DexPathList[[zip file "/data/app/~~0Qh9NhCSypsoQxex8VYNlw==/com.example.sportnews-ZZR6VXexdigkid6Svjme1g==/base.apk"],nativeLibraryDirectories=[/data/app/~~0Qh9NhCSypsoQxex8VYNlw==/com.example.sportnews-ZZR6VXexdigkid6Svjme1g==/lib/x86, /system/lib, /system_ext/lib]]
2021-06-29 170640.696 19407-19407/com.example.sportnews E/AndroidRuntime:    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:207)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
         ... 64 more (edited)

[Jeremy]

Looks like your xml is specifying the fragment which is resulting in Caused by: java.lang.ClassNotFoundException: com.example.News.view.fragments.HomeFragment

[Jeremy]

You should avoid the fragment tag and setup fragments in code