Question

尝试在我的项目中实施Firebase，但实施'com.google.firebase：firebase-core：16.0.1'下划线。拜托。

谢谢Mbuodile Obiosio，但不起作用，我不知道。

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.example.harun.basicmathquiz"
        minSdkVersion 15
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    implementation 'com.android.support:support-annotations:27.1.1'
    implementation 'com.android.support:design:27.1.1'
    implementation 'com.google.firebase:firebase-core:16.0.1'
    implementation 'com.google.firebase:firebase-database:16.0.1'

}

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

AND

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'
        classpath 'com.google.gms:google-services:4.0.1'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        maven { url "https://maven.google.com" }
        jcenter()
    }
}

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

我的错误：所有gms / firebase库必须使用完全相同的版本规范（混合版本可能导致运行时崩溃）。找到版本16.1.1、16.0.1、16.0.0、15.0.1。示例包括com.google.firebase：firebase-analytics-impl：16.1.1和com.google.firebase：firebase-analytics：16.0.1

Answer 1

升级顶级gradle文件中的google-service插件，以避免混合版本错误：

classpath 'com.google.gms:google-services:4.0.1'

https://bintray.com/android/android-tools/com.google.gms.google-services/

Answer 2

我也面临着同样的问题。我的问题通过这样做解决了在Gradle中添加以下内容

classpath 'com.google.gms:google-services:4.0.1'

在依赖关系中

 dependencies {
 .
 .
 .
    implementation ('com.google.firebase:firebase-database:16.0.1') {
        exclude group: "com.google.android.gms"
    }
}
apply plugin: 'com.google.gms.google-services'

Answer 3

您正在混合版本，这就是为什么会出现错误。

    apply plugin: 'com.android.application'

    android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.example.harun.basicmathquiz"
        minSdkVersion 15
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
      }
    }

    dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support:support-annotations:27.1.1'
    implementation 'com.android.support:design:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    implementation 'com.google.firebase:firebase-core:16.0.1'
    implementation 'com.google.firebase:firebase-database:16.0.1'    
 }

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

不要忘记使用以下内容更新顶级build.gradle文件

classpath 'com.google.gms:google-services:4.0.1'

所有gms / firebase库必须使用完全相同的版本（混合版本可能导致运行时崩溃）。找到的版本16.1.1 16.0.1 16.0.0 15.0.1

3 个答案: