依赖项是最新的，但 Gradle 认为不是

Question

为什么 Gradle 当我使用了最新且相同的版本时会出现有关依赖项的错误？这只是今天才开始，我不知道如何解决这个问题：

All com.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 28.0.0, 26.1.0. Examples include com.android.support:animated-vector-drawable:28.0.0 and com.android.support:support-media-compat:26.1.0

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    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.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:animated-vector-drawable-v7:28.0.0'
    implementation 'com.android.support:support-media-compat-v7:28.0.0'
    implementation 'com.android.support:cardview-v7:28.0.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'com.google.android.gms:play-services-maps:15.0.1'
}

ʍьђઽ૯ท的建议

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':app'.
> Could not generate a proxy class for class com.android.build.gradle.tasks.BuildArtifactReportTask.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 2s

Answer 1

在终端上执行 ./gradlew app:dependencies 将显示不同版本的依赖项。要轻松解决此问题，只需在 Build.gradle.

中添加具有旧版本且不具有相同版本 （与其他相关） 依赖项的依赖项

如果您坚持错误，它将显示哪个依赖项是旧的，然后您可以看到版本之间的差异。

例如，如果您像其他相关依赖项一样将其添加为最新版本，它将得到修复：

implementation 'com.android.support:support-media-compat:28.0.0' // just like the other related dependencies versions.

在你的例子中，其中一个正在使用 26.1.0 版本：

Found versions 28.0.0, 26.1.0

Answer 2

也可以从依赖项中排除版本 26.1.0，但这里是强制执行 28.0.0 的方法：

configurations.all() {
    resolutionStrategy.force "com.android.support:support-media-compat:28.0.0"
}

这可能来自：

implementation "com.google.android.gms:play-services-base:15.0.1"
implementation "com.google.android.gms:play-services-maps:15.0.1"

运行./gradlew app:dependencies从项目的根目录中查看它来自哪里。

Answer 3

可能是因为支持库版本 28 没有任何调用它的库

implementation 'com.android.support:animated-vector-drawable-v7:28.0.0'

或

implementation 'com.android.support:support-media-compat-v7:28.0.0'

或者可能是因为你使用的是28版本的支持库，但是targetSdkVersion低于28版本。

(in Android Studio v:3.1.4)如果您想将另一个库添加到您的项目中，请使用以下 URL

(from toolbar) file \ Project Structure ... \ (from left window : under modules) app \ Dependencies \ (use green plus)

这对我有用：在 build.gradle（项目 Gradle）中添加此行

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "your project"
        minSdkVersion 14
        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 '28.0.3'
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'junit:junit:4.12'
    implementation 'com.android.support:support-v13:28.0.0'
    implementation 'com.android.support:support-v4:28.0.0'
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.android.support.test.espresso:espresso-contrib:3.0.2'
    implementation 'com.google.android.gms:play-services-maps:15.0.1'
    implementation 'com.android.support:cardview-v7:28.0.0'
    implementation 'com.android.support:mediarouter-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:2.0.0-alpha2'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'com.android.support:support-annotations:28.0.0'
    implementation 'com.android.support:design:28.0.0'
}

依赖项是最新的，但 Gradle 认为不是

Dependencies are up-to-date but Gradle thinks not

android

android-gradle-plugin

android-support-library

gradle-dependencies