br_account_einvoice/views/account_invoice.xml
<?xml version="1.0" encoding="UTF-8"?>
<odoo>
<record id="view_br_account_einvoice_invoice_form" model="ir.ui.view">
<field name="name">br_account_einvoice_invoice_form</field>
<field name="model">account.invoice</field>
<field name="inherit_id" ref="br_account.view_br_account_invoice_form"/>
<field name="arch" type="xml">
<div name="button_box" position="inside">
<button name="action_view_edocs" type="object" class="oe_stat_button" icon="fa-file-text-o"
context="{ 'search_default_invoice_id': id }" attrs="{'invisible': ['|', ('state', '=', 'draft'), ('total_edocs', '=', 0)]}">
<field name="total_edocs" /> <span> E-Docs</span>
</button>
<button name="action_preview_danfe" type="object" class="oe_stat_button" icon="fa-file-pdf-o"
string="Imprimir Danfe"
attrs="{'invisible': ['|',('state', '==', 'draft'), ('total_edocs', '=', 0)]}">
</button>
</div>
</field>
</record>
<record id="view_br_account_einvoice_supllier_invoice_form" model="ir.ui.view">
<field name="name">br_account_einvoice_supplier_invoice_form</field>
<field name="model">account.invoice</field>
<field name="inherit_id" ref="br_account.view_br_account_invoice_supplier_form"/>
<field name="arch" type="xml">
<div name="button_box" position="inside">
<button name="action_view_edocs" type="object" class="oe_stat_button" icon="fa-file-text-o"
context="{ 'search_default_invoice_id': id }" attrs="{'invisible': ['|', ('state', '=', 'draft'), ('total_edocs', '=', 0)]}">
<field name="total_edocs" /> <span> E-Docs</span>
</button>
<button name="action_preview_danfe" type="object" class="oe_stat_button" icon="fa-file-pdf-o"
string="Imprimir Danfe"
attrs="{'invisible': ['|',('state', '==', 'draft'), ('total_edocs', '=', 0)]}">
</button>
</div>
</field>
</record>
<record id="view_br_account_einvoice_invoice_line_form" model="ir.ui.view">
<field name="name">br_account_einvoice_invoice_line_form</field>
<field name="model">account.invoice.line</field>
<field name="inherit_id" ref="br_account.view_br_account_invoice_line_form"/>
<field name="arch" type="xml">
<field name="price_subtotal" position="after">
<field name="item_pedido_compra" />
</field>
</field>
</record>
<record id="account.action_invoice_tree2" model="ir.actions.act_window">
<field name="context">{'default_type': 'in_invoice', 'type': 'in_invoice', 'journal_type': 'purchase', 'issuer': 0}</field>
</record>
</odoo>