I finally realized why I cant find a good overview of android programming tecnique that doesnt assume that the student is a proficient windows/event driven programmer. Android is a stack on top of java, which is a stack on top of an operating system, and I betcha most experienced java programmers have never really wondered what goes on below the java interpreter. It isnt necessary. Just call the function, and assume that there are lots of spare mips and megabytes left on the pc. Us old embedded programmers are painfully aware of the number of cycles to read a file and/or draw rectangles because weve probably written every subroutine in a file system and a graphics package at one time or another. My model is that after oncreate returns to the operating system, every event that gets delivered to the activity is sent by the operating system, and the activity gets a quantum to run, however long that is (100ms?) and one really has no idea how many ms will elapse until the activity gets to run again. Horrible for real time stuff like embedded guys are used to. The huge complex overhead of splitting a simple program that does input, process, output and runs in a loop into two tasks makes no sense because both of these tasks are being run by the operating system. Just more overhead. There doesnt seem to be a way to generate a 50ms timer event and run a program at a hi priority. Do any android gurus have an embedded backfround also? I know my lack of 'windows' model programming hinders my understanding, and I'd be grateful for a link to some examples that might help. I have no prob generating a timer interrupt that hits every 100usec on a 20mhz 8 bit microcontroller. Hard to believe I cant run a program faster than every 100ms on a 500mhz 32 bit arm.
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