将标高设置为“自动查看工具栏的标高”，如何更改？

Question

I'm using a theme that will not show the ActionBar by default:

<style name="AppTheme" parent="Theme.AppCompat">
    <item name="windowActionBar">false</item>
    <item name="android:textColorPrimary">#FFFFFF</item>
</style>

However, I'm replacing it with Toolbar in xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    ... >

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar_VenueDetail"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/MainColor" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:background="@color/MainColor"
        android:elevation="@dimen/default_elevation"
        android:orientation="vertical">

    </LinearLayout>

</LinearLayout>

in OnCreate:

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar_VenueDetail);
setSupportActionBar(toolbar);

The expected result is a flat Toolbar and a shadow below the LinearLayout, which is exactly what preview in Android Studio shows me:

However in real life, the Toolbar has also taken effect:

I want to just put the shadow below another View and keep my Toolbar flat, how to achieve this? Is this even possible?

Answer 1

Do not set the toolbar as a support actionbar. You can still set navigation button, title and inflate menu on the toolbar but the elevation shouldn't be applied unless you set it explicitly in code or in the activity layout.

Having said that, make sure that the removing the elevation is not against the principles of material design .