Error:Could not find common.jar (android.arch.core:common:1.0.0). Searched in the following locations: https://jcenter.bintray.com/android/arch/core/common/1.0.0/common-1.0.0.jar 打开之前写的安卓程序,运行,发现提示上述内容,很是奇怪,之前都好好的,为啥突然之间就变这样了,啥都没动啊,clean一下,再运行还是这样,只好…