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.
According to the Bureau of Labor Statistics, architects earned an average annual income of $79,300 in 2011. Workers in the occupation earned $38.13 an hour on average. Architects in the top 10 percent of the pay scale earned more than $119,410 a year, and those in the bottom 10 percent made less than $44,030. Fifty percent of architects had annual incomes between $56,180 and $93,350.