Every layout file has a parent View i.e. Found insideGet the best out of your games by scripting them using UE4 About This Book A straightforward and easy-to-follow format A selection of the most important tasks and problems Carefully organized instructions to solve problems efficiently Clear ... In this tutorial we would create Material style button using appcompat library and after that we would change the material button background color, highlight clicked time color using theme. Next, click the colorPrimaryDark color swatch in the Theme Editor to display the Resources dialog. You should modify, or create if it didn't exists already the file styles.xml, in the values folder, like that :