AdMob MobileAds.initialize()抛出Integer转String类型转换崩溃求助

问题描述 #

通过Firebase Crashlytics监测到应用出现部分崩溃，该问题与Google AdMob库（版本22.6.0）直接相关：AdMob库在操作SharedPreferences时触发类型转换异常，具体为java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String，导致偏好设置获取失败。

当前应用覆盖约230k用户，初期仅6人出现该崩溃，但后续崩溃数量持续增加，且开始影响其他使用同版本AdMob的应用。

崩溃栈信息 #

Fatal Exception: java.lang.ClassCastException
java.lang.Integer cannot be cast to java.lang.String
android.app.SharedPreferencesImpl.getString (SharedPreferencesImpl.java:302)
com.google.android.gms.ads.internal.scionintegration.a.onSharedPreferenceChanged (:com.google.android.gms.policy_ads_fdr_dynamite@240304709@240304704034.602821767.602821767:73)
com.google.android.gms.ads.internal.scionintegration.m.a (:com.google.android.gms.policy_ads_fdr_dynamite@240304709@240304704034.602821767.602821767:106)
com.google.android.gms.ads.nonagon.a.s (:com.google.android.gms.policy_ads_fdr_dynamite@240304709@240304704034.602821767.602821767:439)
com.google.android.gms.ads.nonagon.a.b (:com.google.android.gms.policy_ads_fdr_dynamite@240304709@240304704034.602821767.602821767:5)
com.google.android.gms.ads.ChimeraMobileAdsSettingManagerCreatorImpl.getMobileAdsSettingManager (:com.google.android.gms.policy_ads_fdr_dynamite@240304709@240304704034.602821767.602821767:52)
com.google.android.gms.ads.internal.client.bx.bR (:com.google.android.gms.policy_ads_fdr_dynamite@240304709@240304704034.602821767.602821767:40)
m.ajn.onTransact (:com.google.android.gms.policy_ads_fdr_dynamite@240304709@240304704034.602821767.602821767:21)
android.os.Binder.transact (Binder.java:1173)
obj.gL (:com.google.android.gms@240713038@24.07.13 (190400-607434947):8)
com.google.android.gms.ads.internal.client.ay.getMobileAdsSettingManager (:com.google.android.gms@240713038@24.07.13 (190400-607434947):12)
com.google.android.gms.ads.MobileAdsSettingManagerCreatorImpl.getMobileAdsSettingManager (:com.google.android.gms@240713038@24.07.13 (190400-607434947):42)
com.google.android.gms.ads.internal.client.az.fL (:com.google.android.gms@240713038@24.07.13 (190400-607434947):40)
obk.onTransact (:com.google.android.gms@240713038@24.07.13 (190400-607434947):101)
android.os.Binder.transact (Binder.java:1173)
com.google.android.gms.internal.ads.zzavg.zzbh (com.google.android.gms:play-services-ads-base@@22.6.0:1)
com.google.android.gms.ads.internal.client.zzcp.zze (zzcp.java:169)
com.google.android.gms.ads.internal.client.zzeq.zza (zzeq.java:169)
com.google.android.gms.ads.internal.client.zzaq.zzc (com.google.android.gms:play-services-ads-lite@@22.6.0:169)
com.google.android.gms.ads.internal.client.zzax.zzf (com.google.android.gms:play-services-ads-lite@@22.6.0:126)
com.google.android.gms.ads.internal.client.zzax.zzd (com.google.android.gms:play-services-ads-lite@@22.6.0:126)
com.google.android.gms.ads.internal.client.zzej.zzA (com.google.android.gms:play-services-ads-lite@@22.6.0:17)
com.google.android.gms.ads.internal.client.zzej.zzm (zzej.java:53)
com.google.android.gms.ads.MobileAds.initialize (com.google.android.gms:play-services-ads-lite@@22.6.0:53)
com.MY_APP_PACKAGE.ads.AdMob.initAdmob (AdMob.kt:128)

社区反馈与关联推测 #

目前已有其他开发者反馈相同问题，相关讨论集中在谷歌AdMob SDK官方群组、Reddit开发者社区及Google问题追踪平台。结合时间线来看，崩溃出现当天AdMob Dashboard API曾发生故障，推测该问题与API故障存在关联。

临时解决方案 #

若应用已配置Firebase Remote Config，可新增控制参数，通过开关逻辑决定是否调用MobileAds.initialize()及加载UMP库的同意信息，以此避免触发崩溃。

内容的提问来源于stack exchange，提问作者user924