delphi 12技术问题咨询

delphi 12开发andriod app,接入admob,在虚拟机能正常显示测试广告,在真实手机会闪退报错.报错信息为: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/ads/impl/R$string; at com.google.android.gms.ads.internal.util.zzs.zzu(com.google.android.gms:play-services-ads@@22.2.0:2) at com.google.android.gms.internal.ads.zzcfq.zzae(com.google.android.gms:play-services-ads@@22.2.0:2) at com.google.android.gms.internal.ads.zzect.run(Unknown Source:2) at com.google.android.gms.internal.ads.zzcad.execute(com.google.android.gms:play-services-ads@@22.2.0:2) at com.google.android.gms.internal.ads.zzcaf.execute(com.google.android.gms:play-services-ads@@22.2.0:1) at com.google.android.gms.internal.ads.zzfuf.zzz(com.google.android.gms:play-services-ads@@22.2.0:1) at com.google.android.gms.internal.ads.zzfuf.zzy(com.google.android.gms:play-services-ads@@22.2.0:13) at com.google.android.gms.internal.ads.zzfuf.zzd(com.google.android.gms:play-services-ads@@22.2.0:2) at com.google.android.gms.internal.ads.zzfwk.zzd(com.google.android.gms:play-services-ads@@22.2.0:1) at com.google.android.gms.internal.ads.zzcal.zzd(com.google.android.gms:play-services-ads@@22.2.0:1) at com.google.android.gms.internal.ads.zzdnh.zza(com.google.android.gms:play-services-ads@@22.2.0:1) at com.google.android.gms.internal.ads.zzcfi.zzg(com.google.android.gms:play-services-ads@@22.2.0:6) at com.google.android.gms.internal.ads.zzcfi.onPageFinished(com.google.android.gms:play-services-ads@@22.2.0:8) at SC0.a(chromium-TrichromeWebViewGoogle6432.aab-stable-573519633:11) at Ga.handleMessage(chromium-TrichromeWebViewGoogle6432.aab-stable-573519633:328) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loopOnce(Looper.java:222) at android.os.Looper.loop(Looper.java:314) at android.app.ActivityThread.main(ActivityThread.java:8530) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:561) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975) Caused by: java.lang.ClassNotFoundException: com.google.android.gms.ads.impl.R$string ... 22 more 希望能帮助我找到错误原因并解决.