How to make options menu after drawer button?

Question

I want a options menu after the drawer toggle button like this app. And I want options menu in left, write both sides (don't wanna compromise any). Can anyone tell me how to do that?

-: My tool bar :-

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);

-: My options menu :-

@Override
public boolean onCreateOptionsMenu(final Menu menu) {
   getMenuInflater().inflate(R.menu.option_menu, menu);
}

-: In xml :-

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

    <item
        android:id="@+id/0"
        android:icon="@drawable/ic_0"
        android:title=""
        app:showAsAction="always"
        android:orderInCategory="0"/>

    <item
        android:icon="@drawable/ic_1"
        android:orderInCategory="1"
        android:title=""
        app:showAsAction="always">
        <menu>
            <item
                android:id="@+id/2"
                android:icon="@drawable/ic_2"
                android:orderInCategory="2"
                android:title="2" />

            <item
                android:id="@+id/3"
                android:icon="@drawable/ic_3"
                android:orderInCategory="3"
                android:title="3" />

            <item
                android:id="@+id/4"
                android:icon="@drawable/ic_4"
                android:orderInCategory="4"
                android:title="4" />

            <item
                android:id="@+id/5"
                android:icon="@drawable/ic_5"
                android:orderInCategory="5"
                android:title="5" />

            <item
                android:id="@+id/6"
                android:icon="@drawable/ic_6"
                android:orderInCategory="6"
                android:title="6" />
        </menu>
    </item>
</menu>