Android when you go one level deeper than the most high-level api. It's easy to record a file with AudioRecord(), but getting the audio stream to handle some analysis yourself is way harder. I'm not the best android programmer and had to read the C code underneath to get to the stuff below the "MediaRecorder". Oh and Android design standards and best practices... Nobody tells you which stuff is outdated and that you…
One recurring theme with Android documentation is also showing example usages for the absolutely simplest, most straightforward cases - once you try implementing this in a real app, it turns out things are way more complex