AndroidStudio中的Gradle錯誤：找不到“com.android.tools.build:gradle:7.1.1”。

我正在嘗試將專案從 Eclipse 匯入 Android Studio。在 Eclipse 中，我將其匯出到 gradle，然后將其匯入 Android Studio。注意：我是 gradle 新手，對問題沒有洞察力。現在我得到這個錯誤：

> Configure project :
    Running gradle version: 6.8

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'aBooks'.
 > Could not resolve all artifacts for configuration ':classpath'.
 > Could not find com.android.tools.build:gradle:7.1.1.
 Searched in the following locations:
   - 
https://repo.maven.apache.org/maven2/com/android/tools/build/gradle/7.1.1/gradle-7.1.1.pom
 If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
 Required by:
     project : 

給出的鏈接導致“404 頁面未找到”。

我系統上帶有“gradle-7”的 gradle 檔案是：

梯度檔案：

buildscript {
// added crl  https://tomgregory.com/anatomy-of-a-gradle-build-script/
repositories {
    mavenCentral()
}
println "Running gradle version: $gradle.gradleVersion"
dependencies {
    classpath 'com.android.tools.build:gradle:7.1.1'  // **original error here**
    // https://mvnrepository.com/artifact/com.android.tools.build/gradle
   // implementation group: 'com.android.tools.build', name: 'gradle', version: '7.1.0-alpha01'
    //  https://mvnrepository.com/artifact/com.android.tools.build/gradle/7.1.0-alpha01
}
}

apply plugin: 'com.android.application'   // 'android'


dependencies {
implementation fileTree(dir: 'libs', include: '*.jar')
implementation project(':CRLibs')
implementation 'com.android.support:support-annotations:28.0.0'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'

}

android {
compileSdk 26
buildToolsVersion "32.0.0"

buildFeatures {
    prefab true
    prefabPublishing true
}


sourceSets {
    main {
        manifest.srcFile 'AndroidManifest.xml'
        java.srcDirs = ['src']
        resources.srcDirs = ['src']
        aidl.srcDirs = ['src']
        renderscript.srcDirs = ['src']
        res.srcDirs = ['res']
        assets.srcDirs = ['assets']
    }

    // Move the tests to tests/java, tests/res, etc...
    instrumentTest.setRoot('tests')

    // Move the build types to build-types/<type>
    // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, 
...
    // This moves them out of them default location under src/<type>/... which would
    // conflict with src/ being used by the main source set.
    // Adding new build types or product flavors should be accompanied
    // by a similar customization.
    debug.setRoot('build-types/debug')
    release.setRoot('build-types/release')
}
compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}
dependenciesInfo {
    includeInApk true
    includeInBundle true
}

// no joy
plugins { // added crl https://developer.android.com/studio/releases/gradle-plugin#groovy
    id 'com.android.application' version '7.0.0-alpha13' apply false
    id 'com.android.library' version '7.0.0-alpha13' apply false
    id 'org.jetbrains.kotlin.android' version '1.5.31' apply false
}

}

我嘗試將 '7.1.1' 更改為 '7.2' 沒有變化。我不知道如何解決這個問題。我搜索中給出的所有答案都與此處的版本不匹配或沒有幫助。

EDIT1：添加資訊。當我轉到檔案-> 專案結構和專案時，我看到了

請注意，Gradle 版本是空白的。如果我輸入 6.8 或 7.1.1 并單擊 OK，我會得到相同的結果，然后如果我回傳 Gradle 版本是空白的。Gradle 版本 6.8 在當前版本中被識別（參見錯誤訊息的第 2 行。不知道這是否意味著什么。這是我的 Gradel-6* 檔案的串列：

uj5u.com熱心網友回復：

添加google()到您的repositories { }塊中。Android Gradle 插件位于那里。

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