flutter踩坑高德地图amap_base

参考这篇简书：https://www.jianshu.com/p/714efea0927e
flutter中使用高德地图的amap_base插件，报错，搞了老半天，还是上网的原因
修改项目文件夹下的android->build.gradle，改为如下：

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