NoClassDefFoundError：com.google.firebase.FirebaseOptions（firebase and admob）

Question

我感到很困扰，因为：

  

java.lang.NoClassDefFoundError：com.google.firebase.FirebaseOptions                                                                              在com.google.firebase.FirebaseApp.initializeApp（未知来源）                                                                              在com.google.firebase.provider.FirebaseInitProvider.onCreate（未知来源）                                                                              在android.content.ContentProvider.attachInfo（ContentProvider.java:1214）                                                                              在android.content.ContentProvider.attachInfo（ContentProvider.java:1189）                                                                              在com.google.firebase.provider.FirebaseInitProvider.attachInfo（未知来源）                                                                              在android.app.ActivityThread.installProvider（ActivityThread.java:4912）                                                                              在android.app.ActivityThread.installContentProviders（ActivityThread.java:4518）                                                                              在android.app.ActivityThread.handleBindApplication（ActivityThread.java:4458）                                                                              在android.app.ActivityThread.access $ 1300（ActivityThread.java:144）                                                                              在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1319）                                                                              在android.os.Handler.dispatchMessage（Handler.java:99）                                                                              在android.os.Looper.loop（Looper.java:137）                                                                              在android.app.ActivityThread.main（ActivityThread.java:5136）                                                                              at java.lang.reflect.Method.invokeNative（Native Method）                                                                              在java.lang.reflect.Method.invoke（Method.java:525）                                                                              在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:737）                                                                              在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:553）                                                                              在dalvik.system.NativeStart.main（本地方法）

Answer 1

当您在项目中使用Google Play服务相关性时，通常会发生这种情况。

只需将Google Play服务依赖关系降级为compile 'com.google.android.gms:play-services:8.3.0'，问题就可能得到解决。