Apk is the android package. R.java (auto generated file) when compiled along with .class (java classes) generated .dex file but these files are not deployable. .dex files are then reprocessed along with manifest file, and other resources (mp3, video, image) and .apk file is generated. This file is deployable.
These are typically new architects who lack experience. The highest-paid architects, those who've been on the job for years, earned over $119,000, and median pay for all architects was about $72,000. According to the American Institute of Architects, the size of the company has a lot to do with how much money an architect is able to earn.
For example the median expected annual pay for a typical Architect I in the United States is $48,379, so 50% of the people who perform the job of Architect I in the United States are expected to make less than $48,379. Source: HR Reported data as of March 31, 2017. Salary. Salary + Bonus.