无法解决Android Studio新项目中的com.android.support:appcompat-v7:26.1.0

我知道这个问题：

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

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

我读过这些文件：

Migrate to Android Plugin for Gradle 3.0.0

Migrating to Android 8.0

所以我发布这个问题,认为它不是重复的.

我安装了Android Studio 3.0.1.之前我没有任何以前的版本,我开始了一个新项目.

Gradle文件中的每个设置都是由Android Studio自己设置的,我已经对它们进行了全部检查.

这些是文件内容：

build.gradle(模块：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(),因为here清楚地说：

06003

我的gradle版本是4.1所以我不需要上面的代码.

但我仍然得到其他人一直在询问的错误：

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

当我在AS 3.0.1中创建一个新项目并且已经设置了所有必要的设置时,为什么我会收到此错误？

更新

@ Rohit的答案以某种方式解决了这个问题,但我仍然得到一些其他依赖项的相同错误.

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

解决方法:

最后我通过修改build.gradle来解决这个问题：

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,因为这些会产生更多错误：

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'

我也有同样的问题,将现有项目从2.3迁移到3.0.1,并修改像这样的项目gradle文件,我想出了一个有效的解决方案：

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()
    }
}

标签：android-studio-3-0,android,android-gradle
来源： https://codeday.me/bug/20190923/1813567.html