Java 加载广告时引发此异常的原因是什么

我使用AdMob在我的应用程序中显示间隙广告，加载广告时引发异常。我不理解异常

当应用程序启动时，我加载一则广告，如下所示：

InterstitialAd ad = new InterstitialAd( context );
ad.setAdUnitId( "ca-app-pub-some-id" );
AdRequest adRequest = new AdRequest.Builder().build();
ad.loadAd( adRequest ); // this line throws the exception

调用

loadAd（）

时，logcat中将显示以下消息：

10-28 21:53:18.965 22950 22950 W System  : ClassLoader referenced unknown path: /data/user/0/com.google.android.gms/app_chimera/m/0000000c/n/armeabi
10-28 21:53:18.976 22950 22950 D DynamitePackage: Instantiated singleton DynamitePackage.
10-28 21:53:18.976 22950 22950 D DynamitePackage: Instantiating com.google.android.gms.ads.ChimeraAdManagerCreatorImpl
10-28 21:53:19.187 22950 22996 W System  : ClassLoader referenced unknown path: 
10-28 21:53:19.196 22950 22996 I DynamiteModule: Considering local module com.google.android.gms.piccard.dynamite:0 and remote module com.google.android.gms.piccard.dynamite:6
10-28 21:53:19.196 22950 22996 I DynamiteModule: Selected remote version of com.google.android.gms.piccard.dynamite, version >= 6
10-28 21:53:19.219 22950 22950 I WebViewFactory: Loading com.android.chrome version 54.0.2840.68 (code 284006852)
10-28 21:53:19.233 22950 22997 I art     : Rejecting re-init on previously-failed class java.lang.Class<abd>: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/chimera/Fragment;
10-28 21:53:19.233 22950 22997 I art     :   at java.lang.Class dalvik.system.DexFile.defineClassNative(java.lang.String, java.lang.ClassLoader, java.lang.Object, dalvik.system.DexFile) (DexFile.java:-2)
10-28 21:53:19.233 22950 22997 I art     :   at java.lang.Class dalvik.system.DexFile.defineClass(java.lang.String, java.lang.ClassLoader, java.lang.Object, dalvik.system.DexFile, java.util.List) (DexFile.java:299)
10-28 21:53:19.233 22950 22997 I art     :   at java.lang.Class dalvik.system.DexFile.loadClassBinaryName(java.lang.String, java.lang.ClassLoader, java.util.List) (DexFile.java:292)
10-28 21:53:19.233 22950 22997 I art     :   at java.lang.Class dalvik.system.DexPathList.findClass(java.lang.String, java.util.List) (DexPathList.java:418)
10-28 21:53:19.233 22950 22997 I art     :   at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:54)
10-28 21:53:19.233 22950 22997 I art     :   at java.lang.Class com.google.android.chimera.container.internal.DelegateLastPathClassLoader.loadClass(java.lang.String, boolean) (:com.google.android.gms:28)
10-28 21:53:19.233 22950 22997 I art     :   at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
10-28 21:53:19.233 22950 22997 I art     :   at hp hp.a(android.content.Context, java.lang.String, java.lang.String, boolean) (:com.google.android.gms.DynamiteModulesA:2618)
10-28 21:53:19.233 22950 22997 I art     :   at hp hg.b(android.content.Context, boolean) (:com.google.android.gms.DynamiteModulesA:130)
10-28 21:53:19.233 22950 22997 I art     :   at void hg.a(android.content.Context, boolean) (:com.google.android.gms.DynamiteModulesA:90)
10-28 21:53:19.234 22950 22997 I art     :   at hh hh.a(java.lang.String, android.content.Context, boolean) (:com.google.android.gms.DynamiteModulesA:80)
10-28 21:53:19.234 22950 22997 I art     :   at void com.google.android.gms.ads.internal.y.run() (:com.google.android.gms.DynamiteModulesA:5173)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Object com.google.android.gms.ads.internal.util.y.call() (:com.google.android.gms.DynamiteModulesA:1055)
10-28 21:53:19.234 22950 22997 I art     :   at void com.google.android.gms.ads.internal.util.z.run() (:com.google.android.gms.DynamiteModulesA:75)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Object java.util.concurrent.Executors$RunnableAdapter.call() (Executors.java:428)
10-28 21:53:19.234 22950 22997 I art     :   at void java.util.concurrent.FutureTask.run() (FutureTask.java:237)
10-28 21:53:19.234 22950 22997 I art     :   at void java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) (ThreadPoolExecutor.java:1133)
10-28 21:53:19.234 22950 22997 I art     :   at void java.util.concurrent.ThreadPoolExecutor$Worker.run() (ThreadPoolExecutor.java:607)
10-28 21:53:19.234 22950 22997 I art     :   at void java.lang.Thread.run() (Thread.java:761)
10-28 21:53:19.234 22950 22997 I art     : Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.chimera.Fragment" on path: DexPathList[[zip file "/data/data/com.google.android.gms/app_chimera/m/0000000c/DynamiteModulesA_GmsCore_prodmnc_alldpi_release.apk"],nativeLibraryDirectories=[/data/user/0/com.google.android.gms/app_chimera/m/0000000c/n/armeabi-v7a, /data/user/0/com.google.android.gms/app_chimera/m/0000000c/n/armeabi, /system/lib, /vendor/lib]]
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:56)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:380)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Class com.google.android.chimera.container.internal.DelegateLastPathClassLoader.loadClass(java.lang.String, boolean) (:com.google.android.gms:34)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Class dalvik.system.DexFile.defineClassNative(java.lang.String, java.lang.ClassLoader, java.lang.Object, dalvik.system.DexFile) (DexFile.java:-2)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Class dalvik.system.DexFile.defineClass(java.lang.String, java.lang.ClassLoader, java.lang.Object, dalvik.system.DexFile, java.util.List) (DexFile.java:299)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Class dalvik.system.DexFile.loadClassBinaryName(java.lang.String, java.lang.ClassLoader, java.util.List) (DexFile.java:292)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Class dalvik.system.DexPathList.findClass(java.lang.String, java.util.List) (DexPathList.java:418)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:54)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Class com.google.android.chimera.container.internal.DelegateLastPathClassLoader.loadClass(java.lang.String, boolean) (:com.google.android.gms:28)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
10-28 21:53:19.234 22950 22997 I art     :   at hp hp.a(android.content.Context, java.lang.String, java.lang.String, boolean) (:com.google.android.gms.DynamiteModulesA:2618)
10-28 21:53:19.234 22950 22997 I art     :   at hp hg.b(android.content.Context, boolean) (:com.google.android.gms.DynamiteModulesA:130)
10-28 21:53:19.234 22950 22997 I art     :   at void hg.a(android.content.Context, boolean) (:com.google.android.gms.DynamiteModulesA:90)
10-28 21:53:19.234 22950 22997 I art     :   at hh hh.a(java.lang.String, android.content.Context, boolean) (:com.google.android.gms.DynamiteModulesA:80)
10-28 21:53:19.234 22950 22997 I art     :   at void com.google.android.gms.ads.internal.y.run() (:com.google.android.gms.DynamiteModulesA:5173)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Object com.google.android.gms.ads.internal.util.y.call() (:com.google.android.gms.DynamiteModulesA:1055)
10-28 21:53:19.234 22950 22997 I art     :   at void com.google.android.gms.ads.internal.util.z.run() (:com.google.android.gms.DynamiteModulesA:75)
10-28 21:53:19.234 22950 22997 I art     :   at java.lang.Object java.util.concurrent.Executors$RunnableAdapter.call() (Executors.java:428)
10-28 21:53:19.234 22950 22997 I art     :   at void java.util.concurrent.FutureTask.run() (FutureTask.java:237)
10-28 21:53:19.234 22950 22997 I art     :   at void java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) (ThreadPoolExecutor.java:1133)
10-28 21:53:19.234 22950 22997 I art     :   at void java.util.concurrent.ThreadPoolExecutor$Worker.run() (ThreadPoolExecutor.java:607)
10-28 21:53:19.234 22950 22997 I art     :   at void java.lang.Thread.run() (Thread.java:761)
10-28 21:53:19.234 22950 22997 I art     : 
10-28 21:53:19.309 22950 22996 W VideoCapabilities: Unrecognized profile 2130706433 for video/avc
10-28 21:53:19.371 22950 22997 W art     : Before Android 4.1, method double java.util.concurrent.ThreadLocalRandom.internalNextDouble(double, double) would have incorrectly overridden the package-private method in java.util.Random
10-28 21:53:19.371 22950 22997 W art     : Before Android 4.1, method int java.util.concurrent.ThreadLocalRandom.internalNextInt(int, int) would have incorrectly overridden the package-private method in java.util.Random
10-28 21:53:19.371 22950 22997 W art     : Before Android 4.1, method long java.util.concurrent.ThreadLocalRandom.internalNextLong(long, long) would have incorrectly overridden the package-private method in java.util.Random
10-28 21:53:19.377 22950 22996 I VideoCapabilities: Unsupported profile 4 for video/mp4v-es
10-28 21:53:19.389 22950 22950 I cr_LibraryLoader: Time to load native libraries: 32 ms (timestamps 9522-9554)
10-28 21:53:19.390 22950 22950 I cr_LibraryLoader: Expected native library version number "54.0.2840.68", actual native library version number "54.0.2840.68"
10-28 21:53:19.519 22950 22950 I cr_LibraryLoader: Expected native library version number "54.0.2840.68", actual native library version number "54.0.2840.68"
10-28 21:53:19.526 22950 22950 I chromium: [INFO:library_loader_hooks.cc(151)] Chromium logging enabled: level = 0, default verbosity = 0
10-28 21:53:19.597 22950 22950 I cr_BrowserStartup: Initializing chromium process, singleProcess=true
10-28 21:53:19.693 22950 22950 I Adreno  : QUALCOMM build                   : 74df444, I409c65498b
10-28 21:53:19.693 22950 22950 I Adreno  : Build Date                       : 06/22/16
10-28 21:53:19.693 22950 22950 I Adreno  : OpenGL ES Shader Compiler Version: XE031.08.00.02
10-28 21:53:19.693 22950 22950 I Adreno  : Local Branch                     : N16
10-28 21:53:19.693 22950 22950 I Adreno  : Remote Branch                    : 
10-28 21:53:19.693 22950 22950 I Adreno  : Remote Branch                    : 
10-28 21:53:19.693 22950 22950 I Adreno  : Reconstruct Branch               : 
10-28 21:53:19.957 22950 22950 I Ads     : Starting ad request.

此异常是什么？我如何修复它

---

处理ads的完整代码是，Gradle文件是。

您是否尝试过更改ads SDK的版本？ 我遇到了类似的问题，然后将ads SDK更改为

com.google.android.gms:play-services-ads:9.8.0

---

试试看：）

我试过9.8.0和9.4.0，但它没有改变任何东西。我有同样的问题，你在使用Proguard吗？@Adelino不，我不使用Proguard。同样的问题，如果你发现了什么，别忘了回答自己。这是你正确的错误原因：

原因：java.lang.ClassNotFoundException:找不到类“com.google.android.chimera.Fragment”路径：DexPathList[[zip文件”/data/data/com.google.android.gms/app_chimera/m/0000000 c/DynamiteModulesA_GmsCore_prodmnc_alldpi_release.apk]，NativeLibrary目录=[/data/user/0/com.google.android.gms/app_chimera/m/0000000c/n/armeabi-v7a，/data/user/0/com.google.android.gms/app_chimera/m/0000000c/n/armeabi，/system/lib，/vendor/lib]

我也有同样的问题，但会显示广告。

com.google.android.gms:play-services-ads:9.8.0