Android

Android Styles and Themes

Android Styles and Themes

Android Styles are defined in an XML resource which is different from the XML that contains the layout properties. The XML resource file contains the <resources> which is a must for the style file. Inside the <resources> tag, you can define multiple styles. However, each style should have a unique identifier. To set Android Style, you need to set the resource file with <item> tag as shown below:

<?xml version="1.0" encoding="utf-8"?>
<resources>
   <style name="CustomFontStyle">
      <item name="android:layout_width">fill_parent</item>
      <item name="android:capitalize">titles</item>
      <item name="android:layout_height">wrap_content</item>
      <item name="android:textColor">#000000</item>/>       
      <item name="android:textSize">15pt</item>
   </style>
</resources>

Android Themes are android styles that are applied to the entire application. So when we apply an Android Style as a theme, each View in that activity is applied that is supported by the theme. To set a theme for your android application, you need to edit the <application> tag in your AndroidManifest.xml file. See the example below for your reference:

<application android:theme = “@style/CustomTheme”>

And suppose you want to apply the theme for a single activity of the entire application, then you can do so by using the <activity> tag as shown below:

<activity android:theme = “@style/CustomTheme”>

Android Studio provides a number of default themes that you can use directly in your application. To use default themes in Android applications, you can follow the example below:

<style name = “MyTheme” parent = “android.Theme.Dark”>
      <item name = "android:layout_width"> fill_parent </item>
      <item name = "android:capitalize"> titles </item> 
      <item name = "android:layout_height"> wrap_content </item>
      <item name = "android:textColor"> #000000 </item>  
      <item name = "android:textSize"> 15pt </item>
   </style>

As you can see we used the ‘parent’ attribute for using default themes. So, you need to use this attribute inside <style> tag. 

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