I created some project using the light theme and now I want to change it to dark and I can\'t figure out how to do that. BTW, I\'m not asking on how to do it in code, just how t
Note : This answer is now out-of-date. This changes the theme in "preview" only as @imjohnking and @john-ktejik pointed out. As @Shahzeb mentioned, theme can modified in res>values>styles
Android Studio 0.8.2 provides a slightly easier way to change the theme. In the preview window, you can select the theme of "Holo.Light.DarkActionBar" by clicking on the theme combo box just above the phone.
Or do a ctrl + click on the @style/AppTheme in the Android manifest file. It will open styles.xml file where you can change the parent attribute of the style tag.
When using the Support Library, you must instead use the Theme.AppCompat themes:
Source http://forums.udacity.com/questions/100200635/choosing-theme-in-android-studio-08x