android studio 遇到failed to resolve: com.android.support:appcompat-v7:27
遇到这种问题
在build.gradel下添加加粗的几行代码即可
buildTypes { repositories{ maven{ url "https://maven.google.com" } } release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } }