I\'m creating a Dialog Box on Holo Theme and want to follow the OS default way of displaying the buttons. So far I have created the dialog box but the buttons don\'t render in t
You can set the theme through the Android Manifest xml or inside the Activity's onCreate with setTheme(android.R.style.Theme_Holo);
The buttons size is not related to the theme itself. The size is up to your xml definitions. In the image you sent, it seems that the buttons received the Holo theme so there's nothing wrong here...
Here's an xml layout that will stretch the buttons to fill the whole dialog width: