The user interface is certainly the most important part of any end user app . For corporate usage apps without user interfaces are of course possible, but even then in most cases, you will have some kind of rudimentary UI, if for no other reason then maybe just to avoid the Android OS to kill your app too readily during resource housekeeping tasks.
In this chapter we will not cover the basics of UI development for Android – instead, it is expected you’ve read some introductory-level book or worked through the official tutorials or ...
