Android 报错 “Failed to resolve: com.android.support:support-v4:26.1.1”

Failed to resolve: com.android.support:support-v4:26.1.1
<a href="open.dependency.in.project.structure">Show in Project Structure dialog</a>
Affected Modules: <a href="openFile:C:/zlc/workplace/as/work_test/>app</a>

• 检查v4的发现版本号，可以看这个文章
  https://www.jianshu.com/p/4991ff8f4766

• 然后更改可以使用的版本号

• 如果本来的版本号没错的话，在项目的build.gradle加上

allprojects {
    repositories {
        jcenter()
//        maven { url "https://jitpack.io" }
        maven { url "https://maven.google.com" }
    }
}