Android training (android style)
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This document discusses styles and themes in Android layout. It explains that styles allow defining properties like colors, fonts and sizes that can be applied to views. Styles can be defined in XML and inherited from other styles or themes. Themes are styles that can be applied to an entire activity or application to define global properties.
Android training (android style)
- 1. Layout Style Android Training By Khaled Anaqwa
- 2. Styles and Themes A style is a collection of properties that specify the look and format for a View or window. A style can specify properties such as height, padding, font color, font size, background color, and much more. Styles in Android share a similar philosophy to cascading stylesheets in web design—they allow you to separate the design from the content.
- 5. Defining Styles To create a set of styles, save an XML file in the res/values/ directory of your project. The root node of the XML file must be <resources>. For each style you want to create, add a <style> element to the file with a name that uniquely identifies the style (this attribute is required).
- 6. <?xml version="1.0" encoding="utf-8"?> <resources> <style name="CodeFont" parent="@android:style/TextAppearance.Medium"> <item name="android:layout_width">fill_parent</item> <item name="android:layout_height">wrap_content</item> <item name="android:textColor">#00FF00</item> <item name="android:typeface">monospace</item> </style> </resources>
- 7. Inheritance The parent attribute in the <style> element lets you specify a style from which your style should inherit properties. <style name="GreenText" parent="@android:style/TextAppearance"> <item name="android:textColor">#00FF00</item> </style>
- 8. Inheritance If you want to inherit from styles that you've defined yourself, you do not have to use the parent attribute. <style name="CodeFont.Red"> <item name="android:textColor">#FF0000</item> </style>
- 9. Theme A theme is a style applied to an entire activity or application, rather than an individual View. android:theme="@android:style/Theme.Dialog” The technique of defining a theme is the same as defining a style.
- 10. <?xml version="1.0" encoding="utf-8"?> <resources> <style name="MyTheme" parent="android:Theme.Dialog"> <item name="android:windowNoTitle">true</item> <item name="android:windowBackground">@color/translucent_red</item> <item name="android:textColor">#00FF00</item> </style> </resources> android:theme=”@style/MyTheme”