Hi Krishnakumar,

First you need to understand the recordset concepts,  @api components, functional field, onchange etc in odoo 8. For that you just refer the official documentation and do a sample module with the new api style.

After that if you can understand the things done in version 7 module, the same can be done as new version 8 module using the new api. I have converted some modules like that(eg: partner_specific_price, mrp_disassemble etc). If you have any queries, contact me: akhil.p.sivan007@gmail.com