How to create your own Theme in Android

How to create your own Theme in Android

Theme in Android means applying the same style to a single activity or whole application .
Note:

• If you will apply theme to a single activity then the style will appear to that particular activity .
• If you will apply theme to whole application then the style will appear to the whole application.

Now if you like a theme and want to alter it of tweak it then follow this blog.

• Now start with a project by selecting new-> file-> Android Application Project.
• Fill the following details in the project.

• Application Name- AndroidTheme
• Project Name -AndroidTheme
• Package Name- theme.android
• Minimum required SDK - 2.2 froyo  and then click next and next then finish.

• Now open your project explorer you will see the following three folder under res folder.

• value - it contain themes and styles for android API 10 and lower version.

• value-v11- it contain themes and styles for Android API 11 to API 13.

• value-v14- it contain themes and styles for Android API 14 and Higher.

• Lets change the theme,Open the values-v14 folder because here i have configured my emulator for android 4.1(API 16)  then open styles.xml
• In styles.xml you will see the following line .here the theme Theme.Holo.Light.DarkActionBar

 <resources>  
   <style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar" />  
 </resources>  

• Now edit it by adding the themes as a parent theme of your custom theme so that following code look like this:

 <resources xmlns:android="http://schemas.android.com/apk/res/android">  
   <style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar" >   
    <item name="android:textSize">42dp</item>  
 </style>  
 </resources>  



• Now when you will run this project you will see following change.

After

Before

• In this way you can alter the attribute and change every aspect of a theme.