安卓编译项目jcenter连接超时

使用阿里云的镜像，项目中的build.gradle文件中jcenter()上方加入代码：
maven{ url'http://maven.aliyun.com/nexus/content/repositories/jcenter'}
整体代码如下:

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext {
        buildToolsVersion = "28.0.3"
        minSdkVersion = 16
        compileSdkVersion = 28
        targetSdkVersion = 28
    }
    repositories {
        google()
        maven{url 'http://maven.aliyun.com/nexus/content/groups/public/'}
        maven{ url'http://maven.aliyun.com/nexus/content/repositories/jcenter'}
        jcenter()
    }
    dependencies {
//        classpath("com.android.tools.build:gradle:3.4.2")
        classpath("com.android.tools.build:gradle:3.3.0")

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

allprojects {
    repositories {
        mavenLocal()
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url("$rootDir/../node_modules/react-native/android")
        }
        maven {
            // Android JSC is installed from npm
            url("$rootDir/../node_modules/jsc-android/dist")
        }

        google()

        maven{url 'http://maven.aliyun.com/nexus/content/groups/public/'}
        maven{ url'http://maven.aliyun.com/nexus/content/repositories/jcenter'}
        jcenter()
        maven { url 'https://jitpack.io' }



    }
}

改完以后删除.gradle .idea重启as