Adding an Icon
GeoQuiz is now up and running, but the user interface would be spiffier if the Next button also displayed a right-pointing arrow icon.
You can find such an arrow in the solutions file for this book (http://www.bignerdranch.com/solutions/AndroidProgramming.zip). The solutions file is a collection of Eclipse projects – one for each chapter.
Download this file and open the 02_MVC/GeoQuiz/res directory. Within this directory, locate the drawable-hdpi, res/drawable-mdpi, and drawable-xhdpi directories.
The suffixes on these directory names refer to the screen pixel density of a device:
medium-density screens (~160dpi)
high-density screens (~240dpi)
extra-high-density screens (~320dpi)
(There is also a low-density ...