Important Dont's For A Good Android App Design(beginner/novice Level)?

Can anyone point to a good source or come up with a brief listing of conceptual android programming DONT's when designing an App? I dont want my question to be vague, so I'll give

Solution 1:

1. The very first most important aspect of mobile app development is the look and feel of you app. Here are Android design principles which give you killer design skills.

2. This is an excellent resource I've found, it is written and explained by Roto Meier.

3. What would be a better teaching guide than Android Developers site itself

4. This is a single resource which is very helpful if you are starting out

5. Here is a same question which was asked on Stack Overflow

6. Android 4.0 enforces strict mode so check this out to know what that is

7. To design a perfect app on any platform the first basic thing you need to know is as of how to divide operations into tasks so that the app runs smoothly, multithreading is an important aspect of Mobile development, this is an excellent link that shows you how to make Multi-threaded Android apps

8. Ofcourse there is also a need to test you app on different devices just to make sure the UI looks perfect, and the app runs smooth. You should also make sure that your app runs on screens of different sizes.