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@tito tito/runnable.py
Last active Mar 17, 2017

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Python decorator for running a python method into the Android activity ui thread.
'''
Run a python method into Activity thread
========================================
Python decorator for running a python method into the Activity ui thread.
This is a way to resolve thoses kind of errors:
- java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
- NullPointerException in enableForegroundDispatch due to ActivityThread.currentActivityThread() return null
How to use it::
@run_on_ui_thread
def nfc_enable_ndef_exchange(self):
self.nfc_adapter.enableForegroundNdefPush(self.j_context, ndef_message)
self.nfc_adapter.enableForegroundDispatch(self.j_context,
self.nfc_pending_intent, self.ndef_exchange_filters, None)
'''
from jnius import autoclass, PythonJavaClass, java_method
PythonActivity = autoclass('org.renpy.android.PythonActivity')
class Runnable(PythonJavaClass):
__javainterfaces__ = ['java/lang/Runnable']
__runnables__ = []
def __init__(self, func):
super(Runnable, self).__init__()
self.func = func
def __call__(self, args, kwargs):
self.args = args
self.kwargs = kwargs
PythonActivity.mActivity.runOnUiThread(self)
Runnable.__runnables__.append(self)
@java_method('()V')
def run(self):
try:
ret = self.func(*self.args, **self.kwargs)
if self.callback:
self.callback(ret)
except:
import trackback
trackback.print_exc()
Runnable.__runnables__.remove(self)
def run_on_ui_thread(f):
def f2(*args, **kwargs):
Runnable(f)(args, kwargs)
return f2
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