react-native - 无法运行示例应用程序

Question

按照教程here，我无法在模拟器中运行该应用程序。当我从DOS提示符下执行命令react-native run-android，这里是错误，我得到：

FAILURE: Build failed with an exception. 

* What went wrong: 
A problem occurred configuring root project 'AwesomeProject'. 
> Could not resolve all dependencies for configuration ':classpath'. 
    > Could not resolve com.android.tools.build:gradle:2.2.3. 
    Required by: 
     :AwesomeProject:unspecified 
     > Could not resolve com.android.tools.build:gradle:2.2.3. 
     > Could not get resource 'https://repo1.maven.org/maven2/com/android/to 
ols/build/gradle/2.2.3/gradle-2.2.3.pom'. 
      > Could not GET 'https://repo1.maven.org/maven2/com/android/tools/bu 
ild/gradle/2.2.3/gradle-2.2.3.pom'. 
       > repo1.maven.org 
     > Could not resolve com.android.tools.build:gradle:2.2.3. 
     > Could not get resource 'https://jcenter.bintray.com/com/android/tools 
/build/gradle/2.2.3/gradle-2.2.3.pom'. 
      > Could not GET 'https://jcenter.bintray.com/com/android/tools/build 
/gradle/2.2.3/gradle-2.2.3.pom'. 
       > jcenter.bintray.com 

* Try: 
Run with --stacktrace option to get the stack trace. Run with --info or --debug 
option to get more log output. 

事情我想：

1. 编辑的build.gradle文件，并从类路径“COM改变类路径。 android.tools.build:gradle:2.2.3'到com.android.tools.build:gradle:3.3.0'（我用Android Studio安装的版本）。
2. 已验证jcenter（）被同时列为buildscript下的build.gradle库并allprojects

Answer 1

我使用react-native cli重新创建了该项目，并且问题似乎自行解决了。我应该注意到，我相信我最初创建项目时并没有安装android studio，所以也许这与它有关，不知道。

Answer 2

尝试将其设置为2.3.0

奇怪，我看不到任何2.2.3在那条路上，但我可以看到一个2.3.0 http://repo1.maven.org/maven2/com/android/tools/build/gradle/