January 2017
Beginner to intermediate
624 pages
22h 42m
English
book
Android Programming: The Big Nerd Ranch Guide, Third Edition
by Bill Phillips, Chris Stewart, Kristin Marsicano
Content preview from Android Programming: The Big Nerd Ranch Guide, Third Edition
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Layer List Drawables
BeatBox is looking good. You now have round buttons and they visually respond to presses. Time for something a little more advanced.
Layer list drawables allow you to combine two XML drawables into one. Armed with this tool, add a dark ring around your button when in the pressed state.
Listing 23.7 Using a layer list drawable (res/drawable/button_beat_box_pressed.xml)
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<solid
android:color="@color/red"/>
</shape>
</item>
<item>
<shape
android:shape="oval">
<stroke
android:width="4dp"
android:color="@color/dark_red"/>
</shape>
</item>
</layer-list> ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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