Show a simple Toast message in android platform with javascript version

I succesfully run the MoonWarriors game on my android device.

But now I want to know how I can show a simple Toast message inside the game. I know how to do this is the c++ version of cocos2d-x using JNI, but this javascript version is different, any help will be appreciated.

You have to know how to expose c++ class to JS.
Please refer to wiki page for more details. Thanks.

I use EasyJSB from https://github.com/lp43/EasyJSB-for-cocos2dx and I finally resolve my problem