@UPDATE
非常感谢。现在至少没有错误了。但它与以前的工作方式——它应该如何工作——仍然相去甚远。现在，数据库看起来……很奇怪。我认为这个 gradle 还是有问题。
It should not look like. According to the java code in the database will be user and its data (name, email, date of account creation, id avatar) 
在应用程序中头像旁边的站点中，您应该显示名称。不幸的是，正如你所看到的，什么也没有发生。该代码没有任何问题，因为它之前是有效的。 :(
我毁了我的项目！我试图修复它，但现在它比以前更糟糕了。
该项目是通过 Firebase 进行聊天的客户端。
当我删除我的基地时就开始了。我有太多的测试用户，我想清除它的消息。从那时起，它收到了一百万个错误通知——试图修复一件事会导致更严重的错误。
我尝试连接到完全不同的基础应用程序，我尝试重新安排一些事情。没有任何帮助。
起初我认为问题出在错误的编译“com.google.firebase:firebase-database:9.8.0”编号上。然后我收到了
E/FirebaseApp：Firebase API 初始化失败。
我尝试修复它。应用程序已启动，数据库中出现了非常奇怪的事情。
现在我明白了
错误：任务 ':app:packageDebug' 执行失败。> !zip.isFile()
构建.gradle（项目）
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.2.3'
classpath 'com.google.gms:google-services:3.0.0'
}
}
build.gradle（模块：应用程序）
apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.example.rachel.komunikator"
minSdkVersion 15
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.1.0'
compile 'com.google.firebase:firebase-database:9.8.0'
compile 'com.google.firebase:firebase-auth:9.8.0'
compile 'com.android.support:recyclerview-v7:25.1.0'
testCompile 'junit:junit:4.12'
}
谷歌播放服务在我的模拟器上
我使用：Android Studio 2.2.3 和 Nexus 5X 模拟器
@UPDATE
W/DynamiteModule：未找到 com.google.firebase.auth 的本地模块描述符类。 E/FirebaseApp：Firebase API
初始化失败。 D/Firebase应用程序：
com.google.firebase.crash.FirebaseCrash 未链接。跳过初始化。
所有日志：
W/System: ClassLoader referenced unknown path: /data/app/com.example.rachel.komunikator-2/lib/x86
[ 02-02 20:56:04.988 1566: 1589 D/ ]
HostConnection::get() New Host Connection established 0x8cf20100, tid 1589
I/InstantRun: Instant Run Runtime started. Android package is com.example.rachel.komunikator, real application class is null.
W/System: ClassLoader referenced unknown path: /data/app/com.example.rachel.komunikator-2/lib/x86
W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found.
W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found.
W/System: ClassLoader referenced unknown path: /system/priv-app/PrebuiltGmsCore/lib/x86
E/FirebaseApp: Firebase API initialization failure.
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at com.google.firebase.FirebaseApp.zza(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.provider.FirebaseInitProvider.onCreate(Unknown Source)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1751)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1726)
at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source)
at android.app.ActivityThread.installProvider(ActivityThread.java:5853)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:5445)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5384)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1545)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.IllegalAccessError: Method 'void android.support.v4.content.ContextCompat.<init>()' is inaccessible to class 'com.google.firebase.iid.zzg' (declaration of 'com.google.firebase.iid.zzg' appears in /data/data/com.example.rachel.komunikator/files/instant-run/dex/slice-com.google.firebase-firebase-iid-9.0.0_8eee9db5e99a0da2dcdc7b52647c81db3aed29e6-classes.dex)
at com.google.firebase.iid.zzg.zzeC(Unknown Source)
at com.google.firebase.iid.zzg.<init>(Unknown Source)
at com.google.firebase.iid.zzg.<init>(Unknown Source)
at com.google.firebase.iid.zzd.zzb(Unknown Source)
at com.google.firebase.iid.FirebaseInstanceId.getInstance(Unknown Source)
at java.lang.reflect.Method.invoke(Native Method)
at com.google.firebase.FirebaseApp.zza(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.provider.FirebaseInitProvider.onCreate(Unknown Source)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1751)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1726)
at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source)
at android.app.ActivityThread.installProvider(ActivityThread.java:5853)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:5445)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5384)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1545)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
D/FirebaseApp: com.google.firebase.crash.FirebaseCrash is not linked. Skipping initialization.
E/FirebaseApp: Firebase API initialization failure.
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at com.google.firebase.FirebaseApp.zza(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.provider.FirebaseInitProvider.onCreate(Unknown Source)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1751)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1726)
at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source)
at android.app.ActivityThread.installProvider(ActivityThread.java:5853)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:5445)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5384)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1545)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.NoSuchMethodError: No static method zzz(Ljava/lang/Object;)Ljava/lang/Object; in class Lcom/google/android/gms/common/internal/zzaa; or its super classes (declaration of 'com.google.android.gms.common.internal.zzaa' appears in /data/data/com.example.rachel.komunikator/files/instant-run/dex/slice-com.google.android.gms-play-services-basement-9.8.0_b60271da061b8a83af31355011409573bfa72cef-classes.dex)
at com.google.android.gms.measurement.internal.zzx.zzbd(Unknown Source)
at com.google.android.gms.measurement.AppMeasurement.getInstance(Unknown Source)
at java.lang.reflect.Method.invoke(Native Method)
at com.google.firebase.FirebaseApp.zza(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
at com.google.firebase.provider.FirebaseInitProvider.onCreate(Unknown Source)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1751)
at android.content.ContentProvider.attachInfo(ContentProvider.java:1726)
at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source)
at android.app.ActivityThread.installProvider(ActivityThread.java:5853)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:5445)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5384)
at android.app.ActivityThread.-wrap2(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1545)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
清理和重建项目应该可以工作。它对我有用。看这个：https://code.google.com/p/android/issues/detail?id=230211 https://code.google.com/p/android/issues/detail?id=230211