19.4. Building the user interface

The UI for the application is modest. The things the UI must do include responding to two different buttons, one for taking a picture and one for calling the JNI functions. Beyond that, the code performs simple operations to display the various bitmap images. Let’s start by looking at the layout for this application.

19.4.1. User interface layout

The layout for this application is contained in the resource file main.xml, shown next.