首次安装Android Studio，gradle7.x下载慢的问题_still waiting for package manifests to be fetched

下载了最新的Android Studio，第一次运行项目时gradle下载了很慢很慢，想换成阿里源，但是因为gradle是7.X，所以各种报错，网上的方法基本都是针对6.X的，大概根据网上的原理做了几次修改也最终解决了，记录一下。

1. 阿里源修改

根目录下setting.gradle和build.gradle都要修改。
build.gradle里加入以下代码

buildscript {
    repositories {
        maven{url 'http://maven.aliyun.com/nexus/content/groups/public/';allowInsecureProtocol = true}
        maven { url "https://jitpack.io" }
        //maven { url 'http://repo1.maven.org/maven2';allowInsecureProtocol = true}
        google()
//        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:7.0.4'
    }
}
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网上的教程基本上也加了下面一个片段

allprojects {
    repositories {
        jcenter()
        maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }
        maven { url "https://jitpack.io" }
        google()
    }
}
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但是最新版本中会报错，删掉就行

Build was configured to prefer settings repositories over project repositories but repository ‘maven’ was added by build file ‘build.gradle’……
这个网站分析的挺好：https://testfairy.com/blog/how-to-prefer-settings-gradle-repositories-over-build-gradle/

然后是修改setting.gradle

pluginManagement {
    repositories {
        maven { url "http://maven.aliyun.com/nexus/content/groups/public/" ;allowInsecureProtocol = true }
        gradlePluginPortal()
        google()
        mavenCentral()
        maven {
            url "https://jitpack.io"
        }
        //maven { url 'http://repo1.maven.org/maven2';allowInsecureProtocol = true}
    }
}



dependencyResolutionManagement {
    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
    repositories {
        maven { url "http://maven.aliyun.com/nexus/content/groups/public/" ;allowInsecureProtocol = true}
        google()
        mavenCentral()
        maven {
            url "https://jitpack.io"
        }
    }
}
rootProject.name = "My Application"
include ':app'
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这样就配置完成了

2. 关于SSL的问题

设置阿里源时gradle7.x对于http的地址会报错，它默认不允许使用不安全的地址，但是如果只把http改成https，我访问时就超时了，不断弹出

Still waiting for package manifests to be fetched remotely.

所以使用http的时候要在后面加上allowInsecureProtocol = true

maven { url "http://maven.aliyun.com/nexus/content/groups/public/" ;allowInsecureProtocol = true}
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参考stackoverflow：https://stackoverflow.com/questions/68585885/allow-insecure-protocols-android-gradle

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这么点问题调试了好久。。。。