Failure building android

just created a new startet app with “ionic start myApp sidemenu”, added the android platform, but when I do “ionic run android” I get this:

ionic run android
Running command: "C:\Program Files\nodejs\node.exe" C:\Cordova\waffr\hooks\after_prepare\010_add_platform_class.js C:\Cordova\waffr
add to body class: platform-android
Running command: cmd "/s /c "C:\Cordova\waffr\platforms\android\cordova\run.bat""
JAVA_HOME=C:\Program Files\Java\jdk1.8.0_25
WARNING : No target specified, deploying to device '05ed1ecb0051152f'.
Running: C:\Cordova\waffr\platforms\android\gradlew cdvBuildDebug -b C:\Cordova\waffr\platforms\android\build.gradle -PcdvBuildArch=arm -Dorg.gradle.daemon=true

FAILURE: Build failed with an exception.

* Where:
Script 'C:\Cordova\waffr\platforms\android\CordovaLib\cordova.gradle' 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.


Total time: 5.79 secs

                    throw e;
Error code 1 for command: cmd with args: /s /c "C:\Cordova\waffr\platforms\android\gradlew cdvBuildDebug -b C:\Cordova\waffr\platforms\android\build.gradle -PcdvBuildArch=arm -Dorg.gradle.daemon=true"
ERROR running one or more of the platforms: Error: cmd: Command failed with exit code 1
You may not have the required environment or OS to run this project

Please be polite, I withdrawn my post because I thought it would not help.