如何修复在android中编译项目时无法找到依赖项的错误？

Question

当我尝试构建我的项目时，我遇到了这些错误，它似乎认为我有两个相同的库，但我不确定为什么：

Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve androidx.legacy:legacy-support-core-utils:1.0.0.
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Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve androidx.appcompat:appcompat:1.0.1.
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Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve androidx.legacy:legacy-support-v4:1.0.0.
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Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.google.inject:guice:4.1.
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Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.google.firebase:firebase-appindexing:16.0.2.
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Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.google.android.gms:play-services-analytics:16.0.5.
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Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.google.android.gms:play-services-ads:17.0.0.
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Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve androidx.lifecycle:lifecycle-runtime:2.0.0.
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Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve androidx.lifecycle:lifecycle-extensions:2.0.0.
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Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve androidx.room:room-runtime:2.1.0-alpha02.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve androidx.legacy:legacy-support-core-utils:1.0.0.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve androidx.appcompat:appcompat:1.0.1.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve androidx.legacy:legacy-support-v4:1.0.0.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.google.inject:guice:4.1.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.google.firebase:firebase-appindexing:16.0.2.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.google.android.gms:play-services-analytics:16.0.5.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.google.android.gms:play-services-ads:17.0.0.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve androidx.lifecycle:lifecycle-runtime:2.0.0.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve androidx.lifecycle:lifecycle-extensions:2.0.0.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve androidx.room:room-runtime:2.1.0-alpha02.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve androidx.legacy:legacy-support-core-utils:1.0.0.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve androidx.appcompat:appcompat:1.0.1.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve androidx.legacy:legacy-support-v4:1.0.0.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.google.inject:guice:4.1.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.google.firebase:firebase-appindexing:16.0.2.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.google.android.gms:play-services-analytics:16.0.5.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.google.android.gms:play-services-ads:17.0.0.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve androidx.lifecycle:lifecycle-runtime:2.0.0.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve androidx.lifecycle:lifecycle-extensions:2.0.0.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve androidx.room:room-runtime:2.1.0-alpha02.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve androidx.room:room-testing:2.1.0-alpha02.
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Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve androidx.legacy:legacy-support-core-utils:1.0.0.
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Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve androidx.appcompat:appcompat:1.0.1.
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Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve androidx.legacy:legacy-support-v4:1.0.0.
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Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.google.inject:guice:4.1.
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Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.google.firebase:firebase-appindexing:16.0.2.
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Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.google.android.gms:play-services-analytics:16.0.5.
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Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.google.android.gms:play-services-ads:17.0.0.
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Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve androidx.lifecycle:lifecycle-runtime:2.0.0.
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Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve androidx.lifecycle:lifecycle-extensions:2.0.0.
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Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve androidx.room:room-runtime:2.1.0-alpha02.
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Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve androidx.legacy:legacy-support-core-utils:1.0.0.
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Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve androidx.appcompat:appcompat:1.0.1.
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Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve androidx.legacy:legacy-support-v4:1.0.0.
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Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.google.inject:guice:4.1.
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Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.google.firebase:firebase-appindexing:16.0.2.
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Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.google.android.gms:play-services-analytics:16.0.5.
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Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.google.android.gms:play-services-ads:17.0.0.
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Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve androidx.lifecycle:lifecycle-runtime:2.0.0.
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Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve androidx.lifecycle:lifecycle-extensions:2.0.0.
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Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve androidx.room:room-runtime:2.1.0-alpha02.
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Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve androidx.room:room-testing:2.1.0-alpha02.
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这是我的build.gradle文件

apply plugin: 'com.android.application'

android {
compileSdkVersion 28
buildToolsVersion '28.0.3'

defaultConfig {
    applicationId "com.andydaykin.timer"
    minSdkVersion 24
    targetSdkVersion 28
    versionCode 1
    versionName "1.0"

}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 
'proguard-rules.pro'
    }
    dexOptions {
        // release & debug is in project animators
        matchingFallbacks = ['release', 'debug']
    }
    debug {
        debuggable true
    }
}
compileOptions {
    targetCompatibility 1.10
    sourceCompatibility 1.10
}
}

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

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
testImplementation 'junit:junit:4.12'

implementation ('androidx.legacy:legacy-support-core-utils:1.0.0') {
    force = true
}
implementation 'androidx.appcompat:appcompat:1.0.1'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'

implementation 'com.google.guava:guava:24.1-jre'
implementation 'com.google.inject:guice:4.1'
implementation 'com.google.firebase:firebase-appindexing:16.0.2'
implementation 'com.google.android.gms:play-services-analytics:16.0.5'
implementation 'com.google.android.gms:play-services-ads:17.0.0'

implementation "androidx.lifecycle:lifecycle-runtime:2.0.0"
implementation "androidx.lifecycle:lifecycle-extensions:2.0.0"
annotationProcessor "androidx.lifecycle:lifecycle-compiler:2.0.0"

def room_version = "2.1.0-alpha02"

implementation "androidx.room:room-runtime:$room_version"
annotationProcessor "androidx.room:room-compiler:$room_version"

testImplementation "androidx.room:room-testing:$room_version"
}

这是我的顶级gradle构建文件：

{

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

buildscript {
    repositories {
        jcenter()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
        google()
}
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'

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

allprojects {
    repositories {
        jcenter()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
        google()
    }
}

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

}

我想这个错误发生在升级到Android Studio后，但我不记得了。我的Android Studio版本现在是3.2.1。我能够让这个项目以前建立。

Answer 1

如果您使用的是Android Studio 3和Gradle版本4。那么就不需要maven了。尝试删除

        maven {
            url 'https://maven.google.com/'
            name 'Google'
             }

只要有，

    buildscript {
    repositories {
        google()
        jcenter()

}
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'

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

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

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

Answer 2

我认为这个错误发生在升级到android studio之后

当您将编译更改为实现时，问题才刚刚开始。

假设A、B和C是三个模块，它们之间的关系如下

C

在使用编译时，C可以直接访问A。但在使用实现时，这是不可能的。有一个api将具有与编译相同的效果。

Answer 3

在您的顶层Gradle文件添加类路径为谷歌服务插件。

dependencies {
    classpath 'com.android.tools.build:gradle:3.2.1'
    classpath 'com.google.gms:google-services:4.0.1'
}

您应该检查您的互联网连接、代理或防火墙。

或

交叉检查以通过以下方式禁用Gradle脱机。

窗户：

设置

Mac：

偏好