java.lang.IllegalArgumentException: AppCompat does not support the current theme features

alternative to @sbaar's answer,

keep windowActionBar to false and add windowNoTitleas well and set it to true.

   <item name="windowActionBar">false</item>
   <item name="windowNoTitle">true</item>

Remove

<item name="windowActionBar">false</item>

from your theme, then make sure you are inheriting from a .NoActionBar Theme, then set your toolbar like normal.

Make sure that your theme is child from Theme.AppCompat.NoActionBar, then in styles.xml:

<style name="MyMaterialTheme" parent="Theme.AppCompat.NoActionBar">
        <item name="windowNoTitle">true</item>
        ...
</style>

Btw, it's a new issue for Support Library 22.1.

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