cordova打包出现问题

输入cordova打包程序的时候

Could not resolve com.android.tools.build:gradle:2.1.0.
Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/gradle/2.1.0/gradle-2.1.0.pom'.
Could not HEAD 'https://jcenter.bintray.com/com/android/tools/build/gradle/2.1.0/gradle-2.1.0.pom'.
asd
Could not resolve com.android.tools.build:gradle:2.1.0.
Could not get resource 'http://maven.aliyun.com/nexus/content/groups/public/com/android/tools/build/gradle/2.1.0/gradle-2.1.0.pom'.
Could not HEAD 'http://maven.aliyun.com/nexus/content/groups/public/com/android/tools/build/gradle/2.1.0/gradle-2.1.0.pom'.
asd

请问有大佬知道该如何处理吗？

有大佬帮助嘛？