Execution failed for task ‘:app:dataBindingMergeDependencyArtifactsDebug’. > Could not resolve all files for configuration ‘:app:debugCompileClasspath’. > Could not resolve com.android.support:appcompat-v7:27.+. Required by: project :app > No cached version listing for com.android.support:appcompat-v7:27.+ available for offline mode. > No cached version listing for com.android.support:appcompat-v7:27.+ available for offline mode. > No cached version listing for com.android.support:appcompat-v7:27.+ available for offline mode.
删除build.gradle下com.android.support:appcompat-v7:27.+ 去除+号，变为com.android.support:appcompat-v7:27‘
