android studio 新建项目报错的解决之路

android studio 新建工程报错

Error:Could not resolve all files for configuration ':app:debugCompileClasspath'.
> Could not resolve com.android.support:appcompat-v7:26.0.0-beta1.
  Required by:
      project :app
   > Could not resolve com.android.support:appcompat-v7:26.0.0-beta1.
      > Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/support/appcompat-v7/26.0.0-beta1/appcompat-v7-26.0.0-beta1.pom'.
         > Could not GET 'https://dl.google.com/dl/android/maven2/com/android/support/appcompat-v7/26.0.0-beta1/appcompat-v7-26.0.0-beta1.pom'.
            > Connect to dl.google.com:443 [dl.google.com/203.208.46.146] failed: Operation timed out (Connection timed out)

1、取消代理

Preferences->Appearance & Behavior->System Settings->Http Proxy
选择 No Proxy

2、取消隐藏代理

关掉隐形代理在mac 上对应的目录：~/.gradle/gradle.properties

3、
Preferences->Build,Execution,Deployment->Gradle，取消“offline work”的勾选，让studio去下载即可。

4、
Preferences->Build,Execution,Deployment->Gradle->Android Studio
取消勾选Disable embedded Maven Repository

5、修改project的bulid.gradle

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

buildscript {
 
 repositories {
 google()
 jcenter()
 }
 dependencies {
 classpath 'com.android.tools.build:gradle:3.0.1'
 

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

allprojects {
 repositories {
 google()
 jcenter()
 }
}
task clean(type: Delete) {
 delete rootProject.buildDir
}

在两个repository加了，阿里云的镜像

 maven {
 url 'http://maven.aliyun.com/nexus/content/groups/public/'
 }

再次sync，问题解决，但是把maven去掉，也能正常sync，有点迷，前几步，我的as本来就配好没有修改，猜测可能是wifi不好。。。

知识点补充：Android Studio 新建工程报错“”Error occurred during initialization of VM ..."解决办法

Android Studio 新建工程报错：

Error occurred during initialization of VM Could not reserve enough space for 1572864KB object heap

You encounter following error:

Error occurred during initialization of VM Could not reserve enough space for 1572864KB object heap

原因：Java虚拟机（JVM）没有足够的内存空间。

解决方案：

1：在个人文件夹（ (C:/Users/username/.gradle 或 ~/.gradle)）下创建gradle.properties文件，添加

org.gradle.jvmargs=-Xmx512m -XX:MaxPermSize=512m


2：或者直接在Android Studio中gradle.properties文件中添加下面这行，存在则修改

org.gradle.jvmargs=-Xmx512m -XX:MaxPermSize=512m