Sencha Capabilities in Mobile Developments

[Suyog]

I want to build mobile applications using Sencha Touch 2. I wanted to know whether Sencha Touch is capable of this or not.
Can I write the code just once for a mobile application involving the use of APIs and the same code can be used to generate the application on multiple platforms like iPhone, Blackberry, Android and Symbian?
Also, if I have already developed an application on Android, can I make some changes in the source code and make it run on iPhone?
Please give your valuable inputs.

[mitchellsimoens]

For the most part yes. You need to know what devices/platforms Sencha Touch supports: http://www.sencha.com/products/touch/features/

Also, for Sencha Touch you need to use the classes in Ext.device.* and just a couple changes to packager.json to target the platform and you are ready to be using it.