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.
Finally, at 10 to 19 years, they get $57,218 to $77,697, and at 20 or more years, they are paid $65,490 to $99,068. The industries that hire the most architects are architectural and engineering services, with 86 percent of the 101,630 jobs. Their salaries are $78,660, which is better than the median. The highest-paying employers are the offices of real estate agents and brokers, with annual wages at $106,360.