googleads-mobile-unity: AndroidJavaException: java.lang.ClassNotFoundException: com.google.android.gms.ads.initialization.OnInitializationCompleteListener

Describe the problem

Steps to reproduce:

I build a project using Admob, it works fine with test app id, ad unit id. But when I release the app, no ads are shown. I test my application using LogCat, it shows these errors.

Relevant Code:

When App start this error is displayed in LogCat

AndroidJavaException: java.lang.ClassNotFoundException: com.google.android.gms.ads.initialization.OnInitializationCompleteListener
java.lang.ClassNotFoundException: com.google.android.gms.ads.initialization.OnInitializationCompleteListener
    at java.lang.Class.classForName(Native Method)
    at java.lang.Class.forName(Class.java:454)
    at com.unity3d.player.UnityPlayer.nativeRender(Native Method)
    at com.unity3d.player.UnityPlayer.access$300(Unknown Source:0)
    at com.unity3d.player.UnityPlayer$e$1.handleMessage(Unknown Source:83)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:223)
    at com.unity3d.player.UnityPlayer$e.run(Unknown Source:20)
Caused by: java.lang.ClassNotFoundException: com.google.android.gms.ads.initialization.OnInitializationCompleteListener
    at java.lang.Class.classForName(Native Method) 
    at java.lang.Class.forName(Class.java:454) 
    at com.unity3d.player.UnityPlayer.nativeRender(Native Method) 
    at com.unity3d.player.UnityPlayer.access$300(Unknown Source:0) 
    at com.unity3d.player.UnityPlayer$e$1.handleMessage(Unknown Source:83) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:223) 
    at com.unity3d.player.UnityPlayer$e.run(Unknown Source:20) 
    at UnityEngine.AndroidJNISafe.CheckException () [0x00000] in <00000000000000000000000000000000>:0 
    at UnityEngine.AndroidJNISafe.FindClass (System.String name) [0x00000] in <000000000000000000000

When I click the show ad button, this error is displayed

AndroidJavaException: java.lang.ClassNotFoundException: com.google.android.gms.ads.AdRequest$Builder
java.lang.ClassNotFoundException: com.google.android.gms.ads.AdRequest$Builder
    at java.lang.Class.classForName(Native Method)
    at java.lang.Class.forName(Class.java:454)
    at com.unity3d.player.UnityPlayer.nativeRender(Native Method)
    at com.unity3d.player.UnityPlayer.access$300(Unknown Source:0)
    at com.unity3d.player.UnityPlayer$e$1.handleMessage(Unknown Source:83)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:223)
    at com.unity3d.player.UnityPlayer$e.run(Unknown Source:20)
Caused by: java.lang.ClassNotFoundException: com.google.android.gms.ads.AdRequest$Builder
    at java.lang.Class.classForName(Native Method) 
    at java.lang.Class.forName(Class.java:454) 
    at com.unity3d.player.UnityPlayer.nativeRender(Native Method) 
    at com.unity3d.player.UnityPlayer.access$300(Unknown Source:0) 
    at com.unity3d.player.UnityPlayer$e$1.handleMessage(Unknown Source:83) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:223) 
    at com.unity3d.player.UnityPlayer$e.run(Unknown Source:20) 
    at UnityEngine.AndroidJNISafe.CheckException () [0x00000] in <00000000000000000000000000000000>:0 
    at UnityEngine.AndroidJNISafe.FindClass (System.String name) [0x00000] in <00000000000000000000000000000000>:0 
    at UnityEngine.AndroidJavaObject._AndroidJavaObject (System.String class

I have done Assets > Play Services Resolver > Android Resolver > Force Resolve like many tutorials but it doesn’t work.

My environment

Unity version: 2020.3.40f1
Google Mobile Ads Unity plugin version: 7.3.1
Platform: Android
Platform OS version: Android 5.0 to API level 31
Any specific devices issue occurs on: All
Mediation ad networks used, and their versions: None

Thank you

About this issue

Original URL
State: closed
Created 2 years ago
Reactions: 1
Comments: 18 (1 by maintainers)

Links to this issue

ClassNotFoundException: com.google.android.gms.ads.initialization...

Most upvoted comments

I have this problem too.

Unity 2021.3.16f1
Mobile Ads Unity plugin 7.1.0-7.3.x
Android API level 31-33

Solution:

Build Settings > Player Setting > Publishing Settings > Custom Progurard File

proguard-user.txt:

-keep class com.google.unity.** {
   *;
}
-keep public class com.google.android.gms.ads.**{
   public *;
}
-keep public class com.google.ads.**{
   public *;
}
-keepattributes *Annotation*
-dontobfuscate

+20

shedeikan on Jan 2, 2023

I have this problem too.

Unity 2021.3.16f1

Mobile Ads Unity plugin 7.1.0-7.3.x

Android API level 31-33

Solution:

Build Settings > Player Setting > Publishing Settings > Custom Progurard File

proguard-user.txt:
-keep class com.google.unity.** {
   *;
}
-keep public class com.google.android.gms.ads.**{
   public *;
}
-keep public class com.google.ads.**{
   public *;
}
-keepattributes *Annotation*
-dontobfuscate

it is works for me. thank you

AshleyLv on Jan 3, 2023

I have this problem too.

Unity 2021.3.16f1

Mobile Ads Unity plugin 7.1.0-7.3.x

Android API level 31-33

Solution:

Build Settings > Player Setting > Publishing Settings > Custom Progurard File

proguard-user.txt:
-keep class com.google.unity.** {
   *;
}
-keep public class com.google.android.gms.ads.**{
   public *;
}
-keep public class com.google.ads.**{
   public *;
}
-keepattributes *Annotation*
-dontobfuscate

work for unity 2022.3.3f1 thanks

Battle4King on Jun 27, 2023

Check out thoes file is exit in unity plugin android dic .If not means generate file error.

wentaoma on Mar 15, 2023

Since there were no recent activities for this issue, we are therefore reluctantly going to close this bug for now.

If you are still experiencing the problem, please file a new issue with the same description, what happens and system / network tracing / Charles logs.

All system setups can be slightly different, so it’s always better to open new issues and reference the related ones. Thanks for your contribution.

kunny on Feb 6, 2023

I have this problem too.

Unity 2021.3.16f1

Mobile Ads Unity plugin 7.1.0-7.3.x

Android API level 31-33

Solution:

Build Settings > Player Setting > Publishing Settings > Custom Progurard File

proguard-user.txt:
-keep class com.google.unity.** {
   *;
}
-keep public class com.google.android.gms.ads.**{
   public *;
}
-keep public class com.google.ads.**{
   public *;
}
-keepattributes *Annotation*
-dontobfuscate

Worked for me thanks. I have been struggling with this issue for days.

diyapkaba on Jan 23, 2023

i have excluded the last line ‘-dontobfuscate’

Yes, me too. Everything is fine

shedeikan on Jan 21, 2023

This issue is often related not running the dependency manager before building.

In the Unity editor, select Assets > External Dependency Manager > Android Resolver > Resolve. The Unity External Dependency Manager library will copy the declared dependencies into the Assets/Plugins/Android directory of your Unity app.

NVentimiglia on Jan 18, 2023

I have this problem too.

Unity 2021.3.16f1

Mobile Ads Unity plugin 7.1.0-7.3.x

Android API level 31-33

Solution:

Build Settings > Player Setting > Publishing Settings > Custom Progurard File

proguard-user.txt:
-keep class com.google.unity.** {
   *;
}
-keep public class com.google.android.gms.ads.**{
   public *;
}
-keep public class com.google.ads.**{
   public *;
}
-keepattributes *Annotation*
-dontobfuscate

it works for me too. Thanks! Wondering, i have excluded the last line ‘-dontobfuscate’, that doesn’t matter right? Coz i think to keep the ‘Obfuscate’ feature.

yong2khoo88 on Jan 15, 2023