Question

这是我第一次在android studio中创建一个新项目。然后，在将构建工具添加到27.0.3并检查了设置中的“启用嵌入式Maven存储库”后，出现了此类错误。谁能帮我解决这个问题？谢谢。

Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support:appcompat-v7:28.0.0.
<a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@debug/compileClasspath&#39;: Could not resolve com.android.support:appcompat-v7:28.0.0.">Show Details</a>    
Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support.constraint:constraint-layout:1.1.3.
<a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@debug/compileClasspath&#39;: Could not resolve com.android.support.constraint:constraint-layout:1.1.3.">Show Details</a>
Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support.test:runner:1.0.2.
<a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@debugAndroidTest/compileClasspath&#39;: Could not resolve com.android.support.test:runner:1.0.2.">Show Details</a>   
Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': 

Could not resolve com.android.support.test.espresso:espresso-core:3.0.2.
    <a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@debugAndroidTest/compileClasspath&#39;: Could not resolve com.android.support.test.espresso:espresso-core:3.0.2.">Show Details</a>   
    Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support:appcompat-v7:28.0.0.
    <a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@debugAndroidTest/compileClasspath&#39;: Could not resolve com.android.support:appcompat-v7:28.0.0.">Show Details</a> 
    Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support.constraint:constraint-layout:1.1.3.
    <a 
href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@debugAndroidTest/compileClasspath&#39;: Could not resolve com.android.support.constraint:constraint-layout:1.1.3.">Show Details</a> 
Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.android.support:appcompat-v7:28.0.0.
<a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@debugUnitTest/compileClasspath&#39;: Could not resolve com.android.support:appcompat-v7:28.0.0.">Show Details</a>    
Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.android.support.constraint:constraint-layout:1.1.3.
<a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@debugUnitTest/compileClasspath&#39;: Could not resolve com.android.support.constraint:constraint-layout:1.1.3.">Show Details</a> 
Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve junit:junit:4.12.
<a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@debugUnitTest/compileClasspath&#39;: Could not resolve junit:junit:4.12.">Show Details</a>   
Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.android.support:appcompat-v7:28.0.0.
<a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@release/compileClasspath&#39;: Could not resolve com.android.support:appcompat-v7:28.0.0.">Show Details</a>  
Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.android.support.constraint:constraint-layout:1.1.3.
<a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@release/compileClasspath&#39;: Could not resolve com.android.support.constraint:constraint-layout:1.1.3.">Show Details</a>   
Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.android.support:appcompat-v7:28.0.0.
<a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@releaseUnitTest/compileClasspath&#39;: Could not resolve com.android.support:appcompat-v7:28.0.0.">Show Details</a>  
Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.android.support.constraint:constraint-layout:1.1.3.
<a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@releaseUnitTest/compileClasspath&#39;: Could not resolve com.android.support.constraint:constraint-layout:1.1.3.">Show Details</a>   
Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve junit:junit:4.12.
<a href="openFile:C:/Users/Juan/AndroidStudioProjects/HelloWorldApp/app/build.gradle">Open File</a><br><a href="Unable to resolve dependency for &#39;:app@releaseUnitTest/compileClasspath&#39;: Could not resolve junit:junit:4.12.">Show Details</a>

这是我的文件build.gradle（项目：HelloWorldApp）

// 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:3.1.4'


        // 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
}

这是我的（Module：app）文件build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.abc.helloworldapp"
        minSdkVersion 15
        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'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    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'
}

Answer 1

这是API问题，请将其更改为27，如果未安装27，则可以通过Studio更新。要从Android Studio打开SDK Manager，请依次点击工具> SDK Manager或单击SDK Manager并安装所需的软件包。

像这样更改代码

apply plugin: 'com.android.application'

android {
compileSdkVersion 27
defaultConfig {
    applicationId "com.abc.helloworldapp"
    minSdkVersion 16
    targetSdkVersion 27
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled true
        shrinkResources true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
aaptOptions {
    cruncherEnabled = false
}
}

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
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:design:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:support-vector-drawable:27.1.1'
}

希望这会起作用。

Answer 2

这是由于gradle或互联网连接。

尝试将您的gradle更新为3.2.0版本：

classpath 'com.android.tools.build:gradle:3.2.0'

在您的root of project -> Build.gradle中有buildscript - dependencies的地方。您可以在classpath中包含dependencies的文件中找到它。在Android Studio中称为project/yourprojectname。

Answer 3

有时它会在无法连接到所需服务器时发生，因此您必须验证一些事情。 1.您必须验证您是否具有网络连接。 2.您必须验证是否可以连接到特定服务器，因此请尝试使用某些VPN。 3.确认您的gradle在线，要在Mac和Windows上转到首选项，我认为它将是Settings == Gradle。

Answer 4

很长一段时间以来，我一直坚持这种问题，在仔细观察问题后终于解决了这个问题，这表明

无法解决'：app @ debug / compileClasspath'的依赖关系

您需要确定并仔细检查该类是否位于该类中。我猜想这件事将对许多人有很大帮助，因为专注于这一点使我更接近解决方案。

谢谢

无法解决依赖Android Studio

4 个答案: