android - 添加 firebase-messaging 时出现错误 :Execution failed for task ':app:processDebugGoogleServices' .

Question

当我添加以下行时:在文件 build.gradle 中编译 'com.google.firebase:firebase-messaging:10.0.1' 并立即在 AndroidStudio 中单击同步:

Please fix the version conflict either by updating the version of the google-services plugin (information about the latest version is available at https://bintray.com/android/android-tools/com.google.gms.google-services/) or updating the version of com.google.android.gms to 10.0.1.

我删除了行 apply plugin: 'com.google.gms.google-services' 然后错误消失了。但是firebase-auth失败:Caused by: java.lang.IllegalStateException: Default FirebaseApp没有在这个进程br.ufrn.imd.sgr中初始化。确保首先调用 FirebaseApp.initializeApp(Context)。

请帮帮我。

build.gradle(项目)

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.3'
        classpath 'com.google.gms:google-services:3.1.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

build.gradle(模块应用程序):

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.3"
    defaultConfig {
        applicationId "package.exemplo"
        minSdkVersion 21
        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-v7:25.3.1'
    compile 'com.android.support:design:25.3.1'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'

    compile 'com.google.firebase:firebase-messaging:10.0.1'
    compile 'com.google.firebase:firebase-auth:11.0.2'
    compile 'com.google.code.gson:gson:2.6.2'
    compile  project (':volley')
}


apply plugin: 'com.google.gms.google-services'

Answer 1

在这里交易:您添加了太旧的依赖项。
您的 Firebase 身份验证依赖版本是 11.0.2 :

compile 'com.google.firebase:firebase-auth:11.0.2'

并且您添加了一个版本为 10.0.1 的 Firebase 依赖项。 :

compile 'com.google.firebase:firebase-messaging:10.0.1'

所以存在依赖版本冲突。这就是您尝试同步时出现 Gradle 构建错误的原因。

要解决这个问题，只需让您的 firebase-messaging依赖版本到最新版本并重新应用 Google Services Gradle 插件:

dependencies {
    ...

    compile 'com.google.firebase:firebase-auth:11.0.2'
    compile 'com.google.firebase:firebase-messaging:11.0.2'

    ...
}

apply plugin: 'com.google.gms.google-services'

希望这可以帮助。