默认FirebaseApp未在此进程中初始化。-Android Studio错误

Question

我在使用FirebaseUI时遇到了麻烦。当我运行我的应用程序时，出现以下问题：“默认FirebaseApp在此进程中未初始化。请确保首先调用FirebaseApp.InitializeApp（上下文）。”

在我的应用程序/构建中。Gradle我有依赖： 、 、 、 

     implementation 'com.google.firebase: firebase-core: 16.0.1'
     implementation 'com.google.firebase: firebase-auth: 16.0.1'
     implementation 'com.google.firebase: firebase-database: 16.0.1'
     implementation 'com.firebaseui: firebase-ui-auth: 4.1.0'

classpath 'com.google.gms: google-services: 4.1.0'
classpath 'com.android.tools.build:gradle:3.3.0-alpha07'

我已经将GoogleServices.json导出到“app”文件夹。我别无选择，问题还在继续。有什么建议吗？

logcat：

------崩溃开始

08-31 19:40:12.718 2865-2865/? E/AndroidRuntime: FATAL EXCEPTION: main
    Process: br.com.luccas.buscaperto, PID: 2865
    java.lang.RuntimeException: Unable to start activity ComponentInfo{br.com.luccas.buscaperto/br.com.luccas.buscaperto.MainActivity}: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process br.com.luccas.buscaperto. Make sure to call FirebaseApp.initializeApp(Context) first.
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
        at android.app.ActivityThread.-wrap11(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:5417)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
     Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process br.com.luccas.buscaperto. Make sure to call FirebaseApp.initializeApp(Context) first.
        at com.google.firebase.FirebaseApp.getInstance(SourceFile:218)
        at com.google.firebase.auth.FirebaseAuth.getInstance(Unknown Source)
        at br.com.luccas.buscaperto.MainActivity.instantiateUser(MainActivity.java:89)
        at br.com.luccas.buscaperto.MainActivity.onCreate(MainActivity.java:64)
        at android.app.Activity.performCreate(Activity.java:6237)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
        at android.app.ActivityThread.-wrap11(ActivityThread.java) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
        at android.os.Handler.dispatchMessage(Handler.java:102) 
        at android.os.Looper.loop(Looper.java:148) 
        at android.app.ActivityThread.main(ActivityThread.java:5417) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

我的顶级等级：

buildscript {
    ext {
        release = [
                versionName: "6.1.0-rc01",
                versionCode: 6100
        ]

        setup = [
                compileSdk: 28,
                buildTools: "28.0.2",
                minSdk    : 14,
                targetSdk : 28
        ]

        versions = [
                androidX: '1.0.0-rc01'
        ]
    }

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.0-alpha07'
        classpath 'com.google.gms:google-services:4.1.0'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

我的应用程序级别分级：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "br.com.luccas.buscaperto"
        minSdkVersion 21
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    buildToolsVersion '28.0.2'
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation "androidx.legacy:legacy-support-v4:${versions.androidX}"
    implementation "androidx.appcompat:appcompat:${versions.androidX}"
    implementation "androidx.constraintlayout:constraintlayout:${versions.androidX}"
    implementation "androidx.recyclerview:recyclerview:${versions.androidX}"
    implementation "androidx.annotation:annotation:${versions.androidX}"

    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

    implementation 'com.mikepenz:materialdrawer:6.1.0-rc01'
    implementation "com.google.android.material:material:${versions.androidX}"

    implementation 'com.google.firebase:firebase-core:16.0.3'
    implementation 'com.google.firebase:firebase-auth:16.0.3'
    implementation 'com.google.firebase:firebase-database:16.0.1'
    implementation 'com.firebaseui:firebase-ui-auth:4.1.0'

    implementation 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
}
apply plugin: 'com.google.gms.google-services'

Answer 1

请升级您的项目级别gms依赖项，我升级到4.2.0，它工作了

classpath 'com.android.tools.build:gradle:3.3.2'
classpath 'com.google.gms:google-services:4.2.0'