account_bank_voucher/account_view.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
	<data>              

        <record id="view_bank_voucher_statement_form" model="ir.ui.view">
            <field name="name">account.bank.vocuher.statement.form.inherit.voucher</field>
            <field name="model">account.bank.statement</field>
            <field name="inherit_id" ref="account.view_bank_statement_form"/>
            <field name="arch" type="xml">
                <div name="import_buttons">
                    <button class="oe_inline oe_stat_button" context="{'default_journal_id': journal_id}" name="%(action_voucher_populate_statement)d" string=" Pagos" type="action" attrs="{'invisible':[('state','=','confirm')]}" widget="statinfo" icon="fa-list"/>
                </div>
                <xpath expr="//field[@name='bank_account_id']" position="before">
                    <field name="voucher_id"/>
                </xpath>
            </field>
        </record>
        
        <record id="view_bank_voucher_statement_form2" model="ir.ui.view">
            <field name="name">account.bank.vocuher.statement.form.inherit.voucher2</field>
            <field name="model">account.bank.statement</field>
            <field name="inherit_id" ref="account.view_bank_statement_form2"/>
            <field name="arch" type="xml">
                <label for="name" position="before">
                    <div class="oe_right oe_button_box" name="import_buttons">
                        <button class="oe_inline oe_stat_button" name="%(action_voucher_populate_statement)d" string=" Pagos" type="action" attrs="{'invisible':[('state','!=','open')]}" context="{'default_journal_id': journal_id}" widget="statinfo" icon="fa-list"/>
                    </div>
                </label>
            </field>
        </record>
	</data>
</openerp>