Duplicate class Android on build

Hello,

When I build my application to Android, I get this error:

FAILURE: Build failed with an exception.



* What went wrong:

Execution failed for task ':launcher:checkReleaseDuplicateClasses'.

> 1 exception was raised by workers:

  java.lang.RuntimeException: Duplicate class android.support.v4.app.RemoteActionCompatParcelizer found in modules classes.jar (:androidx.core.core-1.3.0:) and classes.jar (androidx.core:core:1.1.0)

  Duplicate class android.support.v4.graphics.drawable.IconCompatParcelizer found in modules classes.jar (:androidx.core.core-1.3.0:) and classes.jar (androidx.core:core:1.1.0)

  Duplicate class android.support.v4.os.ResultReceiver found in modules classes.jar (:androidx.core.core-1.3.0:) and classes.jar (androidx.core:core:1.1.0)

  Duplicate class android.support.v4.os.ResultReceiver$1 found in modules classes.jar (:androidx.core.core-1.3.0:) and classes.jar (androidx.core:core:1.1.0)

  Duplicate class android.support.v4.os.ResultReceiver$MyResultReceiver found in modules classes.jar (:androidx.core.core-1.3.0:) and classes.jar (androidx.core:core:1.1.0)

  Duplicate class android.support.v4.os.ResultReceiver$MyRunnable found in modules classes.jar (:androidx.core.core-1.3.0:) and classes.jar (androidx.core:core:1.1.0)

  Duplicate class androidx.annotation.AnimRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.AnimatorRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.AnyRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.AnyThread found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.ArrayRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.AttrRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.BinderThread found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.BoolRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.CallSuper found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.CheckResult found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.ColorInt found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.ColorLong found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.ColorRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.ContentView found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.DimenRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.Dimension found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.DrawableRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.FloatRange found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.FontRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.FractionRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.GuardedBy found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.HalfFloat found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.IdRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.InspectableProperty found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.InspectableProperty$EnumEntry found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.InspectableProperty$FlagEntry found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.InspectableProperty$ValueType found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.IntDef found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.IntRange found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.IntegerRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.InterpolatorRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.Keep found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.LayoutRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.LongDef found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.MainThread found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.MenuRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.NavigationRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.NonNull found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.Nullable found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.PluralsRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.Px found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.RawRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.RequiresApi found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.RequiresFeature found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.RequiresPermission found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.RequiresPermission$Read found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.RequiresPermission$Write found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.RestrictTo found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.RestrictTo$Scope found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.Size found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.StringDef found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.StringRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.StyleRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.StyleableRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.TransitionRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.UiThread found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.VisibleForTesting found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.WorkerThread found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.annotation.XmlRes found in modules androidx.annotation.annotation-1.1.0.jar (androidx.annotation.annotation-1.1.0.jar) and annotation-1.1.0.jar (androidx.annotation:annotation:1.1.0)

  Duplicate class androidx.arch.core.internal.FastSafeIterableMap found in modules androidx.arch.core.core-common-2.0.0.jar (androidx.arch.core.core-common-2.0.0.jar) and core-common-2.0.0.jar (androidx.arch.core:core-common:2.0.0)

  Duplicate class androidx.arch.core.internal.SafeIterableMap found in modules androidx.arch.core.core-common-2.0.0.jar (androidx.arch.core.core-common-2.0.0.jar) and core-common-2.0.0.jar (androidx.arch.core:core-common:2.0.0)

  Duplicate class androidx.arch.core.internal.SafeIterableMap$AscendingIterator found in modules androidx.arch.core.core-common-2.0.0.jar (androidx.arch.core.core-common-2.0.0.jar) and core-common-2.0.0.jar (androidx.arch.core:core-common:2.0.0)

  Duplicate class androidx.arch.core.internal.SafeIterableMap$DescendingIterator found in modules androidx.arch.core.core-common-2.0.0.jar (androidx.arch.core.core-common-2.0.0.jar) and core-common-2.0.0.jar (androidx.arch.core:core-common:2.0.0)

  Duplicate class androidx.arch.core.internal.SafeIterableMap$Entry found in modules androidx.arch.core.core-common-2.0.0.jar (androidx.arch.core.core-common-2.0.0.jar) and core-common-2.0.0.jar (androidx.arch.core:core-common:2.0.0)

  Duplicate class androidx.arch.core.internal.SafeIterableMap$IteratorWithAdditions found in modules androidx.arch.core.core-common-2.0.0.jar (androidx.arch.core.core-common-2.0.0.jar) and core-common-2.0.0.jar (androidx.arch.core:core-common:2.0.0)

  Duplicate class androidx.arch.core.internal.SafeIterableMap$ListIterator found in modules androidx.arch.core.core-common-2.0.0.jar (androidx.arch.core.core-common-2.0.0.jar) and core-common-2.0.0.jar (androidx.arch.core:core-common:2.0.0)

  Duplicate class androidx.arch.core.internal.SafeIterableMap$SupportRemove found in modules androidx.arch.core.core-common-2.0.0.jar (androidx.arch.core.core-common-2.0.0.jar) and core-common-2.0.0.jar (androidx.arch.core:core-common:2.0.0)

  Duplicate class androidx.arch.core.util.Function found in modules androidx.arch.core.core-common-2.0.0.jar (androidx.arch.core.core-common-2.0.0.jar) and core-common-2.0.0.jar (androidx.arch.core:core-common:2.0.0)

I've tried to delete androidx.core:core:1.1.0 but I can't find it anywhere, and also tried to delete resolved librairies in the external dependency manager but it didn't work.

If I check to not load androidx.browser in the settings, the build works but no WebView is displayed in the app.

It happens when I try to build with the UniWeb View asset.

I've been on this issue for almost three days now and I really have no idea how to figure it out.

 

Here are all the depencies from my mainTemplate.gradle file:

dependencies {

    implementation fileTree(dir: 'libs', include: ['*.jar'])

// Android Resolver Dependencies Start

    implementation 'com.applovin.mediation:unityads-adapter:3.7.2.0' // Assets/MaxSdk/Mediation/UnityAds/Editor/Dependencies.xml:4

    implementation 'com.applovin:applovin-sdk:10.3.1' // Assets/MaxSdk/AppLovin/Editor/Dependencies.xml:4

    implementation 'com.google.android.exoplayer:exoplayer:2.13.3' // Assets/MaxSdk/AppLovin/Editor/Dependencies.xml:6

    implementation 'com.google.android.gms:play-services-ads-identifier:16.0.0' // Assets/MaxSdk/AppLovin/Editor/Dependencies.xml:5

// Android Resolver Dependencies End

**DEPS**}

 

this must be the WORST build experience that any system has. android is so convoluted with crap, that it cannot realistically work.
usually, I just target a higher min version that fixes these kind of errors. alternatively, dig through all your external plugins/sdks, see which one brings a random library (via the horrid gradle system that you really have no visibility into), and try to do some trial and error until you fix it

 

I had the same problem and managed to resolve it in the following way:

Initially, the custom templates in the project build settings were enabled. Specifically, android.useAndroidX=true and android.enableJetifier=true were added because some plugin required them.

I disabled the custom templates, then made a build. During this process, Unity downloaded and resolved some libraries. I then re-enabled the custom templates and everything worked properly.