汉堡包以默认高度在工具栏中居中

hamburger centered in toolbar with default height

当我们设置一个带有汉堡包的抽屉时,汉堡包在工具栏的center_vertical,但是如果我们改变工具栏的高度,汉堡包不会移动,我如何将它放在工具栏中中心(垂直)?

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, mToolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    assert drawer != null;
    drawer.setDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    assert navigationView != null;
    navigationView.setNavigationItemSelectedListener(this);

        ----//----

    <android.support.v7.widget.Toolbar
        android:id="@+id/mToolbar"
        android:background="#303f9f"
        android:fitsSystemWindows="true"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        />

使用最小高度属性

android:minHeight="40dp"