Apply a theme to an activity in Android?

Question

I know how to apply a theme to a whole application, but where would I go to apply a theme to just a single activity?

Answer 1

You can apply a theme to any activity by including android:theme inside <activity> inside manifest file.

For example:

1. <activity android:theme="@android:style/Theme.Dialog">
2. <activity android:theme="@style/CustomTheme">

And if you want to set theme programatically then use setTheme() before calling setContentView() and super.onCreate() method inside onCreate() method.

Answer 2

To set it programmatically in Activity.java:

public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setTheme(R.style.MyTheme); // (for Custom theme)   setTheme(android.R.style.Theme_Holo); // (for Android Built In Theme)    this.setContentView(R.layout.myactivity); 

To set in Application scope in Manifest.xml (all activities):

 <application     android:theme="@android:style/Theme.Holo"     android:theme="@style/MyTheme"> 

To set in Activity scope in Manifest.xml (single activity):

  <activity     android:theme="@android:style/Theme.Holo"     android:theme="@style/MyTheme"> 

To build a custom theme, you will have to declare theme in themes.xml file, and set styles in styles.xml file.