I chose a smiley face. toolbar.xml. Android Material Design Toolbar Example. Below we set a drawable logo in our Toolbar. Found inside... Creating a Custom Device Definition The device menu in the Layout Editor toolbar (Figure 16-14) provides a list of preconfigured device types which, ... I'm developing an android app. Android Design — Coordinator Layout #1: An Introduction The Coordinator Layout is described as a “a super-powered FrameLayout” according to the docs. Found inside – Page 204