Can't run Ionic on Android: class not found exception IonicKeyboard

After building and running android app it closes.

Viewing Eclipse logcat it shows a class not found exception com.ionic.keyboard.IonicKeyboard

I'm new with Ionic and I don't know how to make it work. Thanks in advance

I had the same problems. In my case the plugin was already installed, so I had to remove and add it again:

Try this in your app-folder:

cordova plugin remove com.ionic.keyboard

and

cordova plugin add com.ionic.keyboard

Seems that plugin not installed?

Try in cmd:

cordova plugin add com.ionic.keyboard