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

Issue Analytics

State:
Created 9 months ago
Reactions:1
Comments:14 (1 by maintainers)

Top GitHub Comments

12reactions

shedeikancommented, 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

1reaction

Battle4Kingcommented, Jun 27, 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