For the song's current time and duration, 0:00 I created a style called PlaybackTimeStyle and wrapped the height and width. 0:02 Then I gave it that nice light gray color, a size of 18sp and a normal typeface. 0:20 I'll apply this new style to the two text views in the playback controls layout in 0:44 the same exact manner as before. 0:48 Now the tricky part. 1:22 Styling this image view with the rounded corners looks easy on first inspection. 1:23 But applying an attribute for 1:27 a custom view in styles can potentially cause quite the headache. 1:29 In our layout XML, we normally prepend attributes for 1:32 custom views, in our case riv_corner_radius, 1:35 with the app namespace, which we specify at the top of our layout file. 1:40 However, when we move this custom attribute to a style, 1:44 the trick we need is to not include the custom name's face declaration at all. 1:47 I know this may seem counter intuitive, but let's create the style, apply it, and 1:54 then run the app to verify that it indeed works. 1:58 Whoops I spelled the, 2:33 obviously its not the rix_corner_radius its riv_corner_radius. 2:35 Let me go back into styles, fix that typo and we'll run the app one more time. 2:41 Awesome, it still works and now if we wanted, 2:56 we could reuse that style in other images that we wanted to have rounded corners. 2:59 As a bonus, I wanna show you a cool trick that Android Studio can do to make 3:04 refactoring our layouts through styles even easier. 3:07 If you have a view with a bunch of attributes, you can right click it, 3:10 then select Extract Style from the Extract menu, give it a name, and voila. 3:14 The IDE will automatically create the style without you having to think 3:18 about anything. 3:21 It won't pick up certain attributes, but we can add those in manually if we know, 3:23 for example, that we're only going to use this style in a constraint layout. 3:26 I'll demonstrate this process in the tool bar style from the settings activity so 3:30 you can see it in action. 3:33 As I mentioned, Android Studio won't automatically grab the layout constraint 3:35 attributes, so I'll add those in manually. 3:39 I'll use the ever-so-handy selection by columns to create three item opening and 3:42 closing tags for each respective layout attribute. 3:46 And then I'll use the same column selection by clicking Alt, and 3:49 dragging the mouse to select all three lines of the attributes. 3:52 Then I'll hold Alt + Shift and 3:57 click the right arrow to highlight the entire attribute name and cut them out. 3:58 Clicking and holding Alt again and 4:04 dragging to select all three columns of item tags, 4:05 I'll paste in the attributes and repeat the process for their given values. 4:08 That was a mouthful. 4:15 Please let me know if you have any questions about that and 4:17 we'll be sure to help you understand. 4:19 For more information about column selection, and text selection shortcuts in 4:21 Android Studio, based on IntelliJ, see the teachers notes. 4:25 Now that you've created your own style and learned a nice shortcut to easily create 4:28 them from your existing layouts, feel free to explore more of the styles I've created 4:31 for the app, and see if you can picture what they'll do. 4:35