Getting java.lang.NoClassDefFoundError for admob interstitials on some devices

[Alexander Rieger]

Play Store reports crashes on newest AdMob on some devices with Android 9:

    java.lang.NoClassDefFoundError: 

      at jq.b (com.google.android.gms.dynamite_adsdynamite@15090081@15.0.90 (100400-231259764):3)

      at jp.a (com.google.android.gms.dynamite_adsdynamite@15090081@15.0.90 (100400-231259764):3)

      at jr.a (com.google.android.gms.dynamite_adsdynamite@15090081@15.0.90 (100400-231259764):19)

      at com.google.android.gms.ads.internal.util.ar.a (com.google.android.gms.dynamite_adsdynamite@15090081@15.0.90 (100400-231259764):15)

      at iu.a (com.google.android.gms.dynamite_adsdynamite@15090081@15.0.90 (100400-231259764):20)

      at iu.run (com.google.android.gms.dynamite_adsdynamite@15090081@15.0.90 (100400-231259764):8)

    Caused by: java.lang.ClassNotFoundException: 

      at dalvik.system.BaseDexClassLoader.findClass (BaseDexClassLoader.java:134)

      at java.lang.ClassLoader.loadClass (ClassLoader.java:379)

      at ad.loadClass (com.google.android.gms.dynamite_dynamiteloader@1509...@15.0.90 (100400-231259764):4)

      at java.lang.ClassLoader.loadClass (ClassLoader.java:312)

I have upgraded my gradle file to use the newest targetSdkVersion 28 and newest AdMob SDK 17.2.0. But I had conflict problems with different versions of com.android.support libraries. I was able to compile properly by "forcing" com.android.support libraries in version 28.0.0. Maybe this is causing the issue? I am not doing anything fancy, just including admob, facebook, firebase, ... The same app code works without crashes for older targetSdkVersion.

Also I noticed there is the possibility to add the ads over firebase which uses different lib implementation 'com.google.firebase:firebase-ads:17.2.0' and different classes and requries different data in manifest.

Here is my gradle file:

    apply plugin: 'com.android.application'

    

    android {

        compileSdkVersion 28

        buildToolsVersion '28.0.3'

        defaultConfig {

            minSdkVersion 16

            targetSdkVersion 28

            versionCode 373

            versionName "4.0.6"

        }

        buildTypes {

            release {

                minifyEnabled false

                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

            }

        }

        flavorDimensions "tier"

        productFlavors {

           playStoreFree {

                ...

                dimension "tier"

            }

    

    repositories {

        mavenCentral()

        maven {

            url "https://maven.google.com"

        }

    }

    dependencies {

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

        implementation project(':SliderPreference')

        implementation 'com.android.support:customtabs:28.0.0'

        implementation 'com.android.support:animated-vector-drawable:28.0.0'

        implementation 'com.android.support:cardview-v7:28.0.0'

        implementation 'com.android.support:gridlayout-v7:28.0.0'

        implementation 'com.android.support:recyclerview-v7:28.0.0'

        implementation 'com.android.support:appcompat-v7:28.0.0'

        implementation 'com.android.support:support-v4:28.0.0'

        implementation 'com.google.android.gms:play-services-ads:17.2.0'

        implementation 'com.google.android.gms:play-services-analytics:16.0.8'

        implementation 'com.google.firebase:firebase-core:16.0.8'

        implementation 'com.anjlab.android.iab.v3:library:1.0.44'

        implementation 'com.facebook.android:facebook-android-sdk:4.31.0'

        implementation 'com.android.support:recyclerview-v7:28.0.0'

    }

    

    apply plugin: 'com.google.gms.google-services'

In Manifest I have 

    <application ...

            <meta-data

                android:name="com.google.android.gms.ads.AD_MANAGER_APP"

                android:value="true"/>

    ...

Main activity:

    InterstitialAd mInterstitialAd;

    

    @Override

    protected void onPostCreate(Bundle savedInstanceState) {

    MobileAds.initialize(context, BuildConfig.AD_APP_ID);

    MobileAds.setAppMuted(true);

    

    mInterstitialAd = new InterstitialAd (this);

    mInterstitialAd.setAdUnitId(BuildConfig.AD_UNIT_ID);

    

    mInterstitialAd.setAdListener(new AdListener() {

    @Override

    public void onAdFailedToLoad(int errorCode) {

    Log.d("AD", "onAdFailedToLoad: "+String.valueOf(errorCode));

    super.onAdFailedToLoad(errorCode);

    }

    

    @Override

    public void onAdLoaded() {

    Log.d("AD", "onAdLoaded: ");

    super.onAdLoaded();

    }

    

    @Override

    public void onAdClosed() {

    requestNewInterstitial();

    }

    });

    requestNewInterstitial();

    }

    }

   

   

    private void requestNewInterstitial() {

            AdRequest adRequest = new AdRequest.Builder().build();

            mInterstitialAd.loadAd(adRequest);

    }

[mobileadssdk...@google.com]

Hello Alexander,

Thanks for reaching out to us. Our team has a fix in place for this issue. The fix should be available in the future releases of the SDK. Please keep an eye on our release history page for more updates.

Regards,

Deepika Uragayala

Mobile Ads SDK Team

=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~

Also find us on our blog and Google+ page:
    http://googleadsdeveloper.blogspot.com
    https://plus.google.com/115658573333388777174/
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On 03/28/19 14:53:45 alexander...@gmail.com wrote:

Play Store reports crashes on newest AdMob on some devices:

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