Implementing Material Design in the PhotoLibrary app

In the previous sections, we looked at how to create the user interface for our app, update theStrings.xmlfile, and create thestyles.xmlfile. Lastly, we looked at creatingPhotoLibraryActivityand making some changes to theMainActivityclass.

In this section, we will learn how to go about creating and implementing custom Material Design Themes, and how to implement Material Design in the PhotoLibrary application.

Creating custom themes for the PhotoLibrary application

Creating custom themes for your apps is extremely easy. Android themes are similar to using CSS style sheets in your web applications for user interface design. Themes allow you to separate styles from your UI components, which makes maintaining your applications look and feel a lot easier.

Let's take a look at how to create a simple style in our styles.xml file for our PhotoLibrary app by following these simple steps:

1. Open the styles.xml file, which is located as part of the PhotoLibrary...