无法在Android Studio新项目中解析com.android.support:appcompat-v7:26.1.0 [英] Could not resolve com.android.support:appcompat-v7:26.1.0 in Android Studio new project

问题描述

我知道这个问题:

无法解决:com.android.support:cardview-v7:26.0.0 android

无法解析com.android.support:appcompat-v7:26.1.0 [重复]

我已经阅读了以下文档:

迁移到适用于Gradle 3.0的Android插件. 0

迁移到Android 8.0

所以我发布这个问题，认为它不是重复的问题.

我已经安装了Android Studio 3.0.1.我以前没有任何以前的版本，所以我开始了一个新项目.

Gradle文件中的每个设置都是由Android Studio本身设置的，我已经全部选中了.

这些是文件内容:

build.gradle(Module:app)

    apply plugin: 'com.android.application'

    android {
        compileSdkVersion 26
        defaultConfig {
            applicationId "com.example.administrator.as301test"
            minSdkVersion 16
            targetSdkVersion 26
            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-v7:26.1.0'
        implementation 'com.android.support.constraint:constraint-layout:1.0.2'
        implementation 'com.android.support:design:26.1.0'
        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'
    }

顶级build.gradle

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'


        // 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
}

gradle-wrapper.properties

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

我在存储库中使用google()作为此处清楚地说:

  // If you're using a version of Gradle lower than 4.1, you must instead use:
     // maven {
     //     url 'https://maven.google.com'
     // }

我的gradle版本是4.1，所以我不需要上面的代码.

但是由于其他人一直在问:

，我仍然会收到此错误消息.

错误:无法解决对':app @ debug/compileClasspath'的依赖关系: 无法解析com.android.support:appcompat-v7:26.1.0.

在AS 3.0.1中创建新项目并且已将其设置为所有必需的设置时，为什么会出现此错误?

更新

@Rohit的回答以某种方式解决了该问题，但对于其他一些依赖项，我仍然遇到相同的错误.

无法解析com.android.support.test:runner:1.0.1

无法解决 com.android.support.test.espresso:espresso-core:3.0.1

无法解析junit:junit:4.12

解决方案

最后，我通过修改build.gradle来解决此问题:

android {
    compileSdkVersion 26
    buildToolsVersion "26.0.2"

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 26
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.android.support:design:26.1.0'
}

我删除了这些行，因为它们会产生更多错误:

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'

在将现有项目从2.3迁移到3.0.1以及修改项目gradle文件时，我也遇到了同样的问题，我想出了一个可行的解决方案:

build.gradle (模块应用)

android {
    compileSdkVersion 27
    buildToolsVersion "27.0.1"

    defaultConfig {
        applicationId "com.mobaleghan.tablighcalendar"
        minSdkVersion 16
        targetSdkVersion 27
    }

dependencies {
    implementation 'com.android.support:appcompat-v7:25.1.0'
    implementation 'com.android.support:design:25.1.0'
    implementation 'com.android.support:preference-v7:25.1.0'
    implementation 'com.android.support:recyclerview-v7:25.1.0'
    implementation 'com.android.support:support-annotations:25.1.0'
    implementation 'com.android.support:support-v4:25.1.0'
    implementation 'com.android.support:cardview-v7:25.1.0'
    implementation 'com.google.android.apps.dashclock:dashclock-api:2.0.0'
}

顶级build.gradle

buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
    }
}

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

I know about this questions:

Failed to resolve: com.android.support:cardview-v7:26.0.0 android

Could not resolve com.android.support:appcompat-v7:26.1.0 [duplicate]

And I've read this documentations:

Migrate to Android Plugin for Gradle 3.0.0

Migrating to Android 8.0

So I'm posting this question believing its not a duplicate.

I've installed Android Studio 3.0.1. I didn't have any previous version before and I started a new project.

Every setting in Gradle file have been set by Android Studio itself and I've checked them all.

These are the file contents:

build.gradle (Module:app)

    apply plugin: 'com.android.application'

    android {
        compileSdkVersion 26
        defaultConfig {
            applicationId "com.example.administrator.as301test"
            minSdkVersion 16
            targetSdkVersion 26
            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-v7:26.1.0'
        implementation 'com.android.support.constraint:constraint-layout:1.0.2'
        implementation 'com.android.support:design:26.1.0'
        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'
    }

Top level build.gradle

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'


        // 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
}

gradle-wrapper.properties

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

I use google() in repositories as here clearly says:

  // If you're using a version of Gradle lower than 4.1, you must instead use:
     // maven {
     //     url 'https://maven.google.com'
     // }

My gradle version is 4.1 so I don't need above code.

But I still get this error as the others have been asking about:

Error:Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support:appcompat-v7:26.1.0.

Why should I get this error when I'm creating a new project in AS 3.0.1 and it has been set all the necessary settings?

Update

@Rohit's answer somehow solved the issue but I still get same error for some other dependencies.

Could not resolve com.android.support.test:runner:1.0.1

Could not resolve com.android.support.test.espresso:espresso-core:3.0.1

Could not resolve junit:junit:4.12

解决方案

Finally I fixed the problem by modifying build.gradle like this:

android {
    compileSdkVersion 26
    buildToolsVersion "26.0.2"

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 26
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.android.support:design:26.1.0'
}

I've removed these lines as these will produce more errors:

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'

Also I had same problem with migrating an existing project from 2.3 to 3.0.1 and with modifying the project gradle files like this, I came up with a working solution:

build.gradle (module app)

android {
    compileSdkVersion 27
    buildToolsVersion "27.0.1"

    defaultConfig {
        applicationId "com.mobaleghan.tablighcalendar"
        minSdkVersion 16
        targetSdkVersion 27
    }

dependencies {
    implementation 'com.android.support:appcompat-v7:25.1.0'
    implementation 'com.android.support:design:25.1.0'
    implementation 'com.android.support:preference-v7:25.1.0'
    implementation 'com.android.support:recyclerview-v7:25.1.0'
    implementation 'com.android.support:support-annotations:25.1.0'
    implementation 'com.android.support:support-v4:25.1.0'
    implementation 'com.android.support:cardview-v7:25.1.0'
    implementation 'com.google.android.apps.dashclock:dashclock-api:2.0.0'
}

Top level build.gradle

buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
    }
}

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

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