social/mail_activity_team/views/mail_activity_team_views.xml

<?xml version="1.0" encoding="utf-8" ?>
<odoo>
<!--
    VIEWS
-->

    <!-- FORM VIEW -->
    <record id="mail_activity_team_view_form" model="ir.ui.view">
        <field name="name">mail.activity.team.view.form</field>
        <field name="model">mail.activity.team</field>
        <field name="arch" type="xml">
            <form string="Activity Team">
                <header>
                    <field name="count_missing_activities" invisible="1" />
                    <button
                        name="assign_team_to_unassigned_activities"
                        string="Assign to missing activities"
                        type="object"
                        class="oe_highlight"
                        groups="base.group_no_one"
                        attrs="{'invisible': [('count_missing_activities', '=', 0)]}"
                    />
                </header>
                <sheet string="Activity Team">
                    <div class="oe_button_box" name="button_box">
                        <button
                            name="toggle_active"
                            type="object"
                            class="oe_stat_button"
                            icon="fa-archive"
                        >
                        <field
                                name="active"
                                widget="boolean_button"
                                options='{"terminology": "archive"}'
                            /></button>
                    </div>
                    <group>
                        <group name="base">
                            <field name="name" />
                            <field name="user_id" />
                        </group>
                        <group name="models">
                            <field
                                name="res_model_ids"
                                widget="many2many_tags"
                                options="{'no_create': True, 'no_open': True}"
                            />
                        </group>
                    </group>
                    <notebook>
                        <page name="members" string="Members">
                            <field name="member_ids" nolabel="1" />
                        </page>
                    </notebook>
                </sheet>
            </form>
        </field>
    </record>


    <!-- TREE VIEW -->
    <record id="mail_activity_team_view_tree" model="ir.ui.view">
        <field name="name">mail.activity.team.view.tree</field>
        <field name="model">mail.activity.team</field>
        <field name="arch" type="xml">
           <tree>
               <field name="name" />
               <field name="res_model_ids" widget="many2many_tags" />
           </tree>
        </field>
    </record>


    <!-- SEARCH VIEW -->
    <record id="mail_activity_team_view_search" model="ir.ui.view">
        <field name="name">mail.activity.team.view.search</field>
        <field name="model">mail.activity.team</field>
        <field name="arch" type="xml">
            <search>
               <field name="name" />
               <field name="res_model_ids" />
               <field name="member_ids" />
            </search>
        </field>
    </record>


<!--
    ACTION
-->
    <record model="ir.actions.act_window" id="mail_activity_team_action">
        <field name="name">Activity Teams</field>
        <field name="res_model">mail.activity.team</field>
        <field name="view_mode">tree,form</field>
        <field name="domain">[]</field>
        <field name="context">{}</field>
        <field name="search_view_id" ref="mail_activity_team_view_search" />
    </record>


<!--
Menus
-->
    <menuitem
        id="menu_mail_activity_team"
        name="Activity Teams"
        parent="base.menu_email"
        action="mail_activity_team_action"
    />

</odoo>