由于缺少jcenter证书，无法构建现有应用程序-被gradle阻止

Question

I tried to build an andruid application using latest andruid studio Seems that gradle is blocked due to lack of jcenter certificate in local machine certstore. My colleguee succeed to build it on his machine so the problem is in the configuration and not the application code

Configuration : andruid studio 3.0.1, gradle 3.0.0 ?, windows 7

I also tried to workaround ssl handshake by replacing jcenter() in build.gradle with

 maven {
            url  "http://jcenter.bintray.com"
        }

but it didn't solve the problem

My build.gradle below:

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Gradle console:

Executing tasks: [assemble]

Configuration on demand is an incubating feature.

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'PDA'.
> Could not resolve all files for configuration ':classpath'.
   > Could not resolve com.android.tools.build:gradle:3.0.0.
     Required by:
         project :
      > Could not resolve com.android.tools.build:gradle:3.0.0.
         > Could not get resource 'http://jcenter.bintray.com/com/android/tools/build/gradle/3.0.0/gradle-3.0.0.pom'.
            > Could not HEAD 'http://jcenter.bintray.com/com/android/tools/build/gradle/3.0.0/gradle-3.0.0.pom'.
               > Connect to repo.jfrog.org:80 [repo.jfrog.org/52.72.224.151, repo.jfrog.org/34.204.33.255] failed: Connection timed out: connect

Answer 1

The plugin v. 3.xx

 classpath 'com.android.tools.build:gradle:3.0.0'

is not in jcenter .
You have to use the google maven repo.

buildscript {
    repositories {
        jcenter()
        maven {
            url "https://maven.google.com"
        }
    }
}

If you are using Android Studio 3 and gradle v.4.x you can use the google() shortcut

buildscript {
    repositories {
        ... 
        google()
    }
}

Answer 2

Besides as @GabrieleMariotti alreay said, that library will not be found at JCenter, you should not get Connection timed out: connect but a message that the library was not found.

Connection timed out: connect hints, that you cannot access that URL from your machine. My best guess is that you have to use some Proxy to access this URL that properly configured for your colleague, but not for you.