Nov 292011
 

So, I’m hacking on a Python for Android project, which is built over top of the SL4A project. I’m currently using the remote method of development where you fire up an interpreter and share it in public mode. Then you import android.py and instantiate an instance of Android with IP and Port information of your public server. You can then hack in your favorite editor on a laptop instead of using a thumb-board or other. It looks like this:

import android  # The SL4A android.py module should be on your sys.path.

ip = '192.168.x.xxxx'
port = 35766
droid = android.Android((ip, port))

What happens is the __getattr__ method of the Android object uses magic to change droid.getenvironment() into an RPC call to the public server and then return the result back as a named tuple. Nice. Being the nosey bugger that I tend to be, I modified the code to add a debug param to the __init__ method, that when set, would print out what was being sent out over RPC and then the raw tuple results. A snippet of the modification goes like this:

  def __getattr__(self, name):
    def rpc_call(*args):
      if self._debug:
          print "droid.%s%s" % (name, str(args))
      res = self._rpc(name, *args)
      if self._debug:
          print "\t%s" % str(res)
      return res
    return rpc_call

You can easily see where I put my “if self._debug” logic in place. Now if I use my modified android.py I can turn on the debug flag and get some 411 on the magic that is going on. It ends up looking like this:

droid.eventWait(3000,)
	Result(id=28, result=None, error=None)
droid.eventWait(3000,)
	Result(id=29, result={u'data': u'@end', u'name': u'dmt:fromClient.speak', u'time': 1322542655069000L}, error=None)
droid.wakeLockRelease()
	Result(id=30, result=None, error=None)
 Posted by at 12:49 am

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