在空项目上，添加firebase后会导致以下错误:

图像版本:-

正文版:-

All com.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 27.1.1, 25.2.0. Examples include com.android.support:animated-vector-drawable:27.1.1 and com.android.support:support-media-compat:25.2.0

另一个错误:

WARNING: Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'.

是否有任何可能的解决方案来删除这些警告？

我的项目build.gradle是:

// 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:3.1.1'


        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'com.google.gms:google-services:3.1.1'
    }
}

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

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

我的app build.gradle是:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.mad.android.firebasetestauth2"
        minSdkVersion 24
        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:1.0.2'
    implementation 'com.google.firebase:firebase-auth:11.6.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}

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

最佳答案

发生错误是因为 google-services 正在实现一些库，这些库未使用 27.1.1 版本。所以我们需要覆盖版本。

为此，请始终尝试在 android studio 的终端 中运行:

./gradlew -q dependencies app:dependencies --configuration debugAndroidTestCompileClasspath

这将显示一个依赖项列表，其中显示了版本号，如下所示:-

在这里我们需要找到那些没有被覆盖并且版本号像25或26并且没有被覆盖到27的依赖。

就像上面的例子一样，我们有 com.android.support:support-v4:25.2.0

现在我们只需要将其添加到具有最新版本号的依赖项 block 中即可。

最后，依赖 block 如下所示:

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support:support-v4:27.1.1'
    implementation 'com.android.support:support-media-compat:27.1.1'

    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.google.firebase:firebase-auth:12.0.1'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}

这里我们添加

implementation 'com.android.support:support-v4:27.1.1'
implementation 'com.android.support:support-media-compat:27.1.1'

修复

WARNING: Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'.

在project build.gradle中，更新

classpath 'com.google.gms:google-services:3.1.1'

到

classpath 'com.google.gms:google-services:3.2.0'

关于android - 添加 Firebase 导致警告混合版本可能导致运行时崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49754281/