How to change title size in ActionBar?

Question

Android

The text size does not change at all.

drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.app_name, R.string.app_name);
        drawer.addDrawerListener(toggle);
        toggle.syncState();

        navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
        setupHeaderInfo();

and

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/titleContainer"
    android:layout_width="match_parent"
    android:layout_height="48dp"
    android:background="@drawable/list_selector">

    <TextView
        android:id="@+id/title"
        android:layout_width="fill_parent"
        android:layout_height="match_parent"
        android:layout_alignParentLeft="true"
        android:minHeight="?android:attr/listPreferredItemHeightSmall"
        android:textAppearance="?android:attr/textAppearanceListItemSmall"
        android:textColor="@drawable/list_item_color"
        android:gravity="center_vertical"
        android:paddingRight="10dp"
        android:paddingLeft="10dp"/>


</RelativeLayout>