ionic run android failed, error gradle line 64

previously I can compile but after I updated my cordova something happended. I got this error.

FAILURE: Build failed with an exception.

* Where:
Script 'C:\Users\Jay\testproject\platforms\android\CordovaLib\cordova.grad
le' line: 64

* What went wrong:
A problem occurred evaluating root project 'android'.
> No installed build tools found. Please install the Android build tools version
19.1.0 or higher.

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

I downloaded all the required SDK, what is the problem here?

Answer

I had the same problem and this is how I fixed it. I had the build-tools version 20 installed but still was getting this error:

No installed build tools found. Please install the Android build tools version 19.1.0 or higher.

So I created a directory named 

20

 within 

build-tools

 directory,
and copied all the files from 

sdk\build-tools\android-4.4W\*

 to 

sdk\build-tools\20

.
The problem was fixed!