It looks pretty good!
I'm an Android developer, so I'm probably going to be a bit nit picky. Here are my suggestions (using a Nexus 5):
First, do not ask the user to confirm closing the app when the back button is pressed. This is somewhat of an anti-pattern in Android. Yes, I know there's an option in the app's preferences, but there shouldn't be (or it should default to off). See the flowchart on the
Confirming & Acknowledging page of the Android developer docs for some more guidance on this. In short, you should only confirm an action if it could cause the user to lose data or otherwise significantly inconvenience them.
Second, you have some odd margin/padding things going on. See
my first attachment- the extra space outside of both the content and the tabs is a bit awkward. This disappears when I enable the navigation drawer. It also happens with the main ListView (
attachment 2), but I can concede that could be a design decision. I personally expected the ListView to fill the width, but you could convince me otherwise.
Thirdly, the text in the "About KING TeC" dialog turns black when pressed (see
third attachement). I think this usually occurs when android:autolink is set on a TextView, and can be circumvented by manually specifying a color. IMO, the dialog should also have a "close" button. Dialogs without any sort of action button can be confusing.
Finally, I suggest a different application icon for a few reasons. First, this icon doesn't really say anything about the app. Second, it will be a little strange if your team comes out with a second app, since the icon is a team logo.
Keep up the good work!