a Sample of Nine-Patch button Steps to create Nine-Patch Buttons Nine-patches are the most common way to specify the appearance of Android buttons, though any drawable type can be used. For example, to apply the custom color to the window background, add the following two elements to your custom theme, defined in MyAndroidApp/res/values/styles.xml file a Custom Nine-Patch With ButtonsĪ nine-patch drawable is a special kind of image which can be scaled in width and height while maintaining its visual integrity. These attributes are defined in your styles.xml file. Your color resource can then be applied to some theme attributes, such as the window background and the primary text color, by adding elements to your custom theme. Your new theme will be applied to your activity, and text is now bright red. In your AndroidManifest.xml apply the theme to the activities you want to style − To implement a custom theme create or edit MyAndroidApp/res/values/themes.xml and add the following − You can use this to inherit properties from an existing style and then define only the properties that you want to change or add. Style InheritanceĪndroid supports style Inheritance in very much similar way as cascading style sheet in web design. To understand the concept related to Android Style, you can check Style Demo Example. Once your style is defined, you can use it in your XML Layout file using style attribute as follows −

The value for the can be a keyword string, a hex color, a reference to another resource type, or other value depending on the style property. Android style attributes are set using tag as shown below − You can define multiple styles per file using tag but each style will have its name that uniquely identifies the style. The name of the XML file is arbitrary, but it must use the. This XML file resides under res/values/ directory of your project and will have as the root node which is mandatory for the style file. Defining StylesĪ style is defined in an XML resource that is separate from the XML that specifies the layout. A style can be applied to an individual View (from within a layout file) or to an entire Activity or application (from within the manifest file). A style resource defines the format and look for a UI.

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