Could not find support-annotatio

今天编译项目遇到一个报错，如下：

ERROR: Could not find support-annotations.jar (com.android.support:support-annotations:27.0.2).
Searched in the following locations:
https://jcenter.bintray.com/com/android/support/support-annotations/27.0.2/support-annotations-27.0.2.jar
Please install the Android Support Repository from the Android SDK Manager.
Open Android SDK Manager

image.png

错误原因是找不到support-annotations 27.0.2 的这个库，我打开连接，确实没有

image.png

解决方案

在项目的build.gradle repositories里面加入下面代码,
maven { url "https://maven.google.com"}

其实应该就是jcenter仓库里面没有该资源，我们用Google中的Maven仓库里下载就有了，所以问题就迎刃而解，记录下来，给别人作为参考

allprojects {
    repositories {

        //需要添加的部分
        maven { url "https://maven.google.com"}

        maven { url "http://maven.aliyun.com/nexus/content/groups/public" }
        jcenter()
        maven { url 'https://jitpack.io' }
        mavenCentral()
        flatDir {
            dirs 'libs'
        }
    }
}

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