title: run on android react native project not working got some error
body: <p>I'm trying to run a react native project I have created by this link:
  <a href="https://facebook.github.io/react-native/docs/getting-started.html" rel="noreferrer">https://facebook.github.io/react-native/docs/getting-started.html</a></p>
  
  <p>I Don't know what went wrong...</p>
  
  <p>And got this error:</p>
  
  <pre><code>D:\reactNativeInstall\some&gt;react-native run-android
  Starting JS server...
  Running adb -s 4d000b6157ee602b reverse tcp:8081 tcp:8081
  Building and installing the app on the device (cd android &amp;&amp; gradlew.bat install
  Debug...
  Downloading https://services.gradle.org/distributions/gradle-2.4-all.zip
  
  Exception in thread "main" javax.net.ssl.SSLHandshakeException: sun.security.val
  idator.ValidatorException: PKIX path building failed: sun.security.provider.cert
  path.SunCertPathBuilderException: unable to find valid certification path to req
  uested target
          at sun.security.ssl.Alerts.getSSLException(Unknown Source)
          at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
          at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
          at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
          at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
          at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
          at sun.security.ssl.Handshaker.processLoop(Unknown Source)
          at sun.security.ssl.Handshaker.process_record(Unknown Source)
          at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
          at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source
  )
          at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
          at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
          at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
          at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect
  (Unknown Source)
          at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown S
  ource)
          at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown So
  urce)
          at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unkn
  own Source)
          at org.gradle.wrapper.Download.downloadInternal(Download.java:58)
          at org.gradle.wrapper.Download.download(Download.java:44)
          at org.gradle.wrapper.Install$1.call(Install.java:59)
          at org.gradle.wrapper.Install$1.call(Install.java:46)
          at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAcc
  essManager.java:65)
          at org.gradle.wrapper.Install.createDist(Install.java:46)
          at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:126)
          at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
  Caused by: sun.security.validator.ValidatorException: PKIX path building failed:
   sun.security.provider.certpath.SunCertPathBuilderException: unable to find vali
  d certification path to requested target
          at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
          at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
          at sun.security.validator.Validator.validate(Unknown Source)
          at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
          at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
          at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Sour
  ce)
          ... 21 more
  Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to
   find valid certification path to requested target
          at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Sourc
  e)
          at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown
   Source)
          at java.security.cert.CertPathBuilder.build(Unknown Source)
          ... 27 more
  Could not install the app on the device, read the error above for details.
  Make sure you have an Android emulator running or a device connected and have
  set up your Android development environment.
  Go to https://facebook.github.io/react-native/docs/getting-started.html
  and check the Android tab for setup instructions.
  </code></pre>
  
  <p>What can I do to resolve this issue?</p>