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Could not find support-annotations.jar (com.android.support:support-annotations:25.1.1)问题解决办法

FAILURE: Build failed with an exception.

• What went wrong: A problem occurred configuring project ‘:app’.
  Could not find support-annotations.jar (com.android.support:support-annotations:27.1.1).
  Searched in the following locations:
  https://jcenter.bintray.com/com/android/support/support-annotations/27.1.1/support-annotations-27.1.1.jar

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

CONFIGURE FAILED

Total time: 12.839 secs Could not find support-annotations.jar

(com.android.support:support-annotations:27.1.1). Searched in the

following locations:

https://jcenter.bintray.com/com/android/support/support-annotations/27.1.1/support-annotations-27.1.1.jar

某一天编译版本忽然出现这个问题，在网上查找了几个方法都不行，后来发现自己的repositories是这样写的：

repositories {
           jcenter()        mavenCentral()        maven {
    url 'http://maven.aliyun.com/nexus/content/groups/public/' }    }

先执行了jcenter，这个时候没找到com.android.support:support-annotations:27.1.1，就直接报错了，不会再继续往下执行。

解决办法如下：

repositories {
           maven {
    url 'http://maven.aliyun.com/nexus/content/groups/public/' }        jcenter()        mavenCentral()    }

将maven { url ‘http://maven.aliyun.com/nexus/content/groups/public/’ }挪上去即可，让它先下载

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