Is possible to integrate sencha touch
with a ExtJS
project?
I am using ExtJS 3.2.1.
Thanks
Short answer: Yes
Long answer: ExtJS is a javascript framework, which provides GUI elements, along with tools for manipulating the DOM and such, and is designed for writing webapps. Sencha-touch is specifically designed for mobile webapps. So, while it may be possible to integrate the two, I am not sure why you would want to. Taking a quick look at the Sencha Touch documentation, it should provide all the tools you need.
So yes, you can integrate the two, but I don't know why you would want to.
Yes you can very easily. However - what you will end up with is a desktop app which looks like it should be running on a mobile device. You also have to trade off specific features which are best suited for desktop (like grids and paging).
Plus - if you develop a desktop app using Sencha Touch - it won't for for all browsers. Specifically it will run best only in Chrome, Firefox and Safari.
Sencha Ext JS 5.0 and Sencha Touch use much of the same code. If you are able to upgrade to 5.0 it will make your job much easier. This is one of the goals of sencha with each new version it releases, to write code once (in Ext JS) and have it run on both desktop and mobile devices with minimal code changes. There is an example on the Sencha blog at: http://www.sencha.com/blog/reusing-code-in-ext-js-5-and-sencha-touch-apps-to-build-a-sencha-space-app/