Android studio Connection timed out: connect

在这之前，想着配置国内镜像，结果镜像不可用，就出现了这个问题，改回no proxy，也没用

org.gradle.api.ProjectConfigurationException: A problem occurred configuring root project 'WanNengAdapter'

Caused by: org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all files for configuration ':classpath'

Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve com.android.tools.build:gradle:4.4

Caused by: org.gradle.api.resources.ResourceException: Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/gradle/4.4/gradle-4.4.pom'

Caused by: org.gradle.internal.resource.transport.http.HttpRequestException: Could not GET 'https://jcenter.bintray.com/com/android/tools/build/gradle/4.4/gradle-4.4.pom'

Caused by: org.apache.http.conn.HttpHostConnectException: Connect to mirrors.dormforce.net:80 [mirrors.dormforce.net/202.115.22.208] failed: Connection timed out: connect

解决：

gradle.properties中改回来就行