Could not find support-fragment.jar (com.android.support:support-fragment:27.1.1)这个错误 解决方法:项目根目录的gradle里面把google()或者mave { url "http://maven.google.com" }放在jcenter()的前面
maven { url "https://maven.google.com" }
maven { url "https://maven.google.com" }