eiru_service/views/project_service_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        
        <!-- form view -->
        
        <record model="ir.ui.view" id="project_service_activity_form">
            <field name="name">project.service.activity.form</field>
            <field name="model">project.service.activity</field>
            <field name="arch" type="xml">
                <form string="Actividades">
                    <sheet>
                        <group>
                            <div class="oe_title oe_left">
                                <div class="oe_edit_only">
                                    <label for="task_id" string="Tarea"/>
                                </div>
                                <h2>
                                    <field name="task_id" placeholder="Tarea"/>
                                </h2>
                            </div>   
                        </group>   
                        <group>
                            <group>
                                <field name="product_id" string="Actividad planeada"/>
                                <field name="time_spent" widget="float_time" string="Tiempo Estimado"/>
                            </group>
                            <group>
                                <field name="user_id" string="Responsable"/>
                                <field name="work_date" string="Fecha"/>
                                <field name="work_cost" string="Costo"/>
                            </group>
                        </group>    
                    </sheet>
                </form>
            </field>
        </record>
        
        <!-- tree view -->
        
        <record model="ir.ui.view" id="project_service_activity_tree" > 
           <field name="name">project.service.activity.tree</field>
            <field name="model">project.service.activity</field>
            <field name="arch" type="xml">
                <tree string="tareas">
                    <field name="user_id" string="Responsable"/>
                    <field name="task_id" string="Trabajo"/>
                    <field name="product_id" string="Actividad"/>
                    <field name="work_date" string="Fecha"/>
                    <field name="work_cost" string="Costo"/>
                    <field name="completed" string="Estado"/>
                </tree>
            </field>
        </record>
        
        <!-- calendar view -->
        
        <record model="ir.ui.view" id="project_service_activity_calendar">
            <field name="name">project.service.activity.calendar</field>
            <field name="model">project.service.activity</field>
            <field eval="2" name="priority"/>
            <field name="arch" type="xml">
                <calendar color="user_id" date_start="work_date" string="Actividades">
                    <field name="product_id"/>
                    <field name="task_id"/>
                </calendar>
            </field>
        </record>

        <!-- Search -->

        <record model="ir.ui.view" id="project_service_activity_search">
            <field name="name">project.service.activity.search</field>
            <field name="model">project.service.activity</field>
            <field name="arch" type="xml">
               <search string="Actividades">
                    <field name="name" string="Actividad"/>
                    <field name="user_id" string="Responsable"/>
                    <field name="task_id" string="Tarea"/>
                    <filter string="Mis Actividades" domain="[('user_id','=',uid)]"/>
                    <separator/>
                    <filter string="Terminados" name="End" domain="[('completed','=',1)]"/>
                    <filter string="Pendientes" name="Pending" domain="[('completed','=',0)]"/>
                    <separator/>
                    <group expand="0" string="Agrupar por ">
                        <filter string="Tarea" name="task" context="{'group_by':'task_id'}"/>
                        <filter string="Responsables" name="User" context="{'group_by':'user_id'}"/>
                        <separator/>
                    </group>
                </search>
            </field>
        </record>

        <!-- action -->
        
        <record model="ir.actions.act_window" id="project_service_activity_action">
            <field name="name">Todas las actividades</field>
            <field name="res_model">project.service.activity</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree,form,calendar</field>
        </record>
        
        <!-- menus -->
        
        <menuitem name="Control de Actividades" parent="project_main_menu" id="project_service_activity_parent_menu" sequence="3"/>
        <menuitem name="Todos las Actividades" parent="project_service_activity_parent_menu" id="project_service_activity_all_menu" sequence="1" action="project_service_activity_action"/>
    </data>
</openerp>