<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:showIn="navigation_view"
    >

    <item android:title="@string/transfer_protocol">
        <menu>
            <group android:checkableBehavior="single">
                <item
                    android:id="@+id/nav_tf_usb"
                    android:icon="@drawable/ic_usb"
                    android:title="@string/tf_usb"
                    android:checkable="true"
                    />
                <item
                    android:id="@+id/nav_tf_net"
                    android:icon="@drawable/ic_net"
                    android:title="@string/tf_net"
                    android:checkable="true"
                    />
                <item
                    android:id="@+id/nav_gl"
                    android:icon="@drawable/ic_usb"
                    android:title="@string/gl"
                    android:checkable="true"
                    />
            </group>
        </menu>
    </item>

    <item android:title="@string/other">
        <menu>
            <item
                android:id="@+id/nav_settings"
                android:icon="@drawable/ic_settings"
                android:title="@string/settings" />
            <item
                android:id="@+id/nav_about"
                android:icon="@drawable/ic_info"
                android:title="@string/about_app" />
        </menu>
    </item>
</menu>