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Styles and Themes in Android

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Including One Layout in Another

0:57 with Strange Learning

The 'include' tag is a powerful trick used in Android layouts to decrease duplicated code. Let's see how to use them in our music application. Toward the end of the video, I 'll issue you a challenge to create your first style on your own.

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    Before we move on, I wanted to point out a cool feature of Android 0:00
    layouts that I'm using in this app. 0:03
    If you look at the activitysongplayback.xml file, 0:04
    you'll notice that I have an interesting looking tag called include. 0:08
    Although it isn't something that directly relates to styles and 0:11
    themes, I wanted to share this cool trick as it's used a couple of times in the app. 0:13
    And it's a great way to isolate layouts that are semantically similar. 0:17
    To utilize the include tag, you simply have to declare your layout file in 0:20
    one file, and you use the include tag in another layout that you want to use it in. 0:24
    Then, specify the layout attribute with the name of the file your layout you'd 0:28
    like to include was created in. 0:32
    Now that you've got another cool Android trick under your belt, 0:38
    I'm going to challenge you to extract another couple of styles for this app. 0:40
    Try and see if you can create a style for 0:44
    the song's playback time and the song's duration. 0:46
    Then, if you want to go above and beyond, 0:49
    try styling the album artwork with the rounded corners in the playback activity. 0:51
    Come back when you're ready for my solution. 0:55

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