JCenter下載太慢？教你修改Maven倉庫地址為國內鏡像

http://blog.csdn.net/biezhihua/article/details/49668605

轉載自：http://www.yrom.net/blog/2015/02/07/change-gradle-maven-repo-url/

近來遷移了一些項目到Android Studio，采用Gradle構建確實比原來的Ant方便許多。但是編譯時下載依賴的網速又着實令人蛋疼不已。

如果能切換到國內的Maven鏡像倉庫，如開源中國的Maven庫，又或者是換成自建的Maven私服，那想必是極好的。

一個簡單的辦法，修改項目根目錄下的build.gradle，將jcenter()或者mavenCentral()替換掉即可：

allprojects {
    repositories {
        maven{ url 'http://maven.oschina.net/content/groups/public/'}
    }
}

但是架不住項目多，難不成每個都改一遍么？ 
自然是有省事的辦法，將下面這段Copy到名為init.gradle文件中，並保存到USER_HOME/.gradle/文件夾下即可。

allprojects{
    repositories {
        def REPOSITORY_URL = 'http://maven.oschina.net/content/groups/public'
        all { ArtifactRepository repo ->
            if(repo instanceof MavenArtifactRepository){
                def url = repo.url.toString()
                if (url.startsWith('https://repo1.maven.org/maven2') || url.startsWith('https://jcenter.bintray.com/')) {
                    project.logger.lifecycle "Repository ${repo.url} replaced by $REPOSITORY_URL."
                    remove repo
                }
            }
        }
        maven {
            url REPOSITORY_URL
        }
    }
}

init.gradle文件其實是Gradle的初始化腳本(Initialization Scripts)，也是運行時的全局配置。

如果碰到如下錯誤，多嘗試幾次就好了：

FAILURE: Build failed with an exception. * What went wrong: A problem occurred configuring root project 'fresco'. > Could not resolve all dependencies for configuration ':classpath'. > Could not download httpcore.jar (org.apache.httpcomponents:httpcore:4.1) > Could not get resource 'https://jcenter.bintray.com/org/apache/httpcomponents/httpcore/4.1/httpcore-4.1.jar'. > SSL peer shut down incorrectly * Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. BUILD FAILED