无法解析“”的依赖项：app@debugAndroidTest/compileClasspath'：

我现在正在使用Android Studio 3.0，我刚刚在上面创建了一个项目gradle离线工作已经被禁用了，它说

Error:Unable to resolve dependency for 
  ':app@debugAndroidTest/compileClasspath': Could not resolve 
com.android.support:appcompat-v7:26.0.0-beta1.
   <a href="openFile:C:/Users/ivan/AndroidStudioProjects/Notification/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-v7:26.0.0-beta1.">Show Details</a>

从appcompat支持库依赖项中删除-beta1：

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:0.5'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:2.2.2'
}

---

然后，同步您的项目。

将com.android.support:appcompat-v7:26.0.0-beta1替换为com.android.support:appcompat-v7:26.0.0在androidits下载中有何新功能？可以吗？应该有。@Ivan–在stackoverflow.com上，如果有答案对您有帮助，请确保将其标记为“正确答案”，并向上致谢！

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:0.5'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:2.2.2'
}