report_gralinvoice/report/informe_invoicegral_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
  <data>
      <record id="report_facturagral_tree_view" model="ir.ui.view">
          <field name="name">report.facturagral.tree.view</field>
          <field name="model">invoice.reportgral</field>
          <field name="priority" eval="20"/>
          <field name="arch" type="xml">
              <tree string="Listado de Gastos" create="false">
        <field name="id" invisible="1"/>
        <field name="date"/>
        <field name="user_id" invisible="1"/>
        <field name="company_id" invisible="1" group="base.group_multi_company"/>
        <field name="partner_id"/>
        <field name="supplier_invoice_number"/>
        <field name="product_id" string="Producto"/>
        <field name="name" string="Descripcion"/>
        <field name="product_qty" sum="# of Qty" string="Cant."/>
        <field name="price_total" sum="Total" string="Total"/>
        <field name="state" invisible="1"/>
      </tree>
          </field>
      </record>

  <record id="action_report_facturagral_tree_view" model="ir.actions.act_window">
          <field name="name">Listado de Gastos</field>
          <field name="res_model">invoice.reportgral</field>
          <field name="view_type">form</field>
          <field name="view_mode">tree</field>
  </record>

  <menuitem name="Listado de Gastos" action="action_report_facturagral_tree_view" id="menu_action_account_invoice_report_all1" parent="account.menu_finance_reporting" sequence="2"/>

  </data>
</openerp>