您需要在platform/android内的build.gradle文件中进行一些更改，并需要添加maven {url'

You need to do some changes in your build.gradle file inside platforms/android and need to add maven { url 'https://maven.google.com' } before the jcenter() as follows:

allprojects { 
  repositories { 
    mavenCentral()
    maven { url 'https://maven.google.com' } //add this code
    jcenter() 
 } 
}

这对于新版本的Google库至关重要.他们将库从android SDK移到了Maven存储库中.

This is now essential for new versions of google libraries. They moved their libraries out of the android SDK to the maven repo.