local onButtonEvent = function (event )
system.vibrate()
end


This is my build.settings

-- Supported values for orientation:
-- portrait, portraitUpsideDown, landscapeLeft, landscapeRight

settings = {

orientation = {
default = "portrait",
supported = { "portrait", }
},

iphone = {
plist = {
UIStatusBarHidden = false,
UIPrerenderedIcon = true, -- set to false for "shine" overlay
--UIApplicationExitsOnSuspend = true, -- uncomment to quit app on suspend

            --[[
            -- iOS app URL schemes:
            CFBundleURLTypes =
            {
                {
                    CFBundleURLSchemes =
                    {
                        "fbXXXXXXXXXXXXXX", -- example scheme for facebook
                        "coronasdkapp", -- example second scheme
                    }
                }
            }
            --]]
}
},

--[[
-- Android permissions


       android =
    {


        versionCode = "1",
        permissions =
        {
            { name = ".permission.C2D_MESSAGE", protectionLevel = "signature" },
        },
        usesPermissions =
        {
            "android.permission.VIBRATE"
        },
    },

]]--
}