Connection timed out: connect. If you are behind an HTTP proxy, please configure the proxy settings

问题：

Connection timed out: connect. If you are behind an HTTP proxy, please configure the proxy settings either in IDE or Gradle.

解决：
将google()放或添加到jcenter()前面

//在build.gradle(Projiect)中的repositories 添加google()
buildscript {
    repositories {
        google()
        jcenter()
        
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.1'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        
    }
}