Android studio 3.6.1 出现Cause: unable to find valid certification path to requested target 报错的解决方法

1、首先修改根目录下的build.gradle成如下格式

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

buildscript {
    
    repositories {

        maven { url 'http://maven.aliyun.com/nexus/content/repositories/google' }
        maven { url 'http://maven.aliyun.com/nexus/content/repositories/jcenter'}
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.6.1'
        

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

allprojects {
    repositories {
//        google()
//        jcenter()
        maven { url 'http://maven.aliyun.com/nexus/content/repositories/google' }
        maven { url 'http://maven.aliyun.com/nexus/content/repositories/jcenter'}

    }
}

2、然后点击sync project with gradle files，如下图所示

3、 如果再次报错请清理缓存并重启AS，方法如下图

4、（最重要的步骤）如果再次报错，请不厌其烦的且厚不要脸的多次点击这个小象（即重复第二步操作），正常情况下奇迹会发生的。（反正我是见证该奇迹了）

Good luck！