I am facing the problem when running my Cordova projects on my android phone.

"Could not find gradle wrapper within Android SDK. Might need to update your Android SDK. Looked here: C:\Users\SIW\AppData\Local\Android\Sdk\tools\templates\gradle\wrapper

And looking for the solution on google on hours. It was not an SDK issue.  Google has changed the location of a gardle wrapper in their SDK which was causing Cordova not being able to find it. 

We have to install the new version of android-platform for Cordova.

 cordova platform rm android
 cordova platform add https://github.com/apache/cordova-android

I hope it helps you.