title: j center or something else?
body: <p>please somebody help me on this
  i made a react native project with the command line react-native init and when i wanna open test it while my android emulator is open and i run it with the command line react-native run android i get this messege </p>
  
  <blockquote>
    <p>Could not resolve all dependencies for configuration ':classpath'.
    Could not resolve com.android.tools.build:gradle:2.3.3.
         Required by:
             project :
    Could not resolve com.android.tools.build:gradle:2.3.3.
    Could not get resource '<a href="https://jcenter.bintray.com/com/android/tools/build/gradle/2.3.3/gradle-2.3.3.pom" rel="nofollow noreferrer">https://jcenter.bintray.com/com/android/tools/build/gradle/2.3.3/gradle-2.3.3.pom</a>'.
    Could not GET '<a href="https://jcenter.bintray.com/com/android/tools/build/gradle/2.3.3/gradle-2.3.3.pom" rel="nofollow noreferrer">https://jcenter.bintray.com/com/android/tools/build/gradle/2.3.3/gradle-2.3.3.pom</a>'.
    Connect to jcenter.bintray.com:443 [jcenter.bintray.com/5.153.35.248] failed: Connection timed out: connect</p>
  </blockquote>
  
  <p>i try everthing to fix it but nothing happened</p>