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from jnius import autoclass
from jnius import cast
from jnius import java_method
from jnius import PythonJavaClass
from math import exp
from plyer.facades import Humidity
from plyer.platforms.android import activity
ActivityInfo = autoclass('android.content.pm.ActivityInfo')
Context = autoclass('android.content.Context')
Sensor = autoclass('android.hardware.Sensor')
SensorManager = autoclass('android.hardware.SensorManager')
class RelativeHumiditySensorListener(PythonJavaClass):
__javainterfaces__ = ['android/hardware/SensorEventListener']
def __init__(self):
super().__init__()
service = activity.getSystemService(Context.SENSOR_SERVICE)
self.SensorManager = cast('android.hardware.SensorManager', service)
self.sensor = self.SensorManager.getDefaultSensor(
Sensor.TYPE_RELATIVE_HUMIDITY)
self.value = None
def enable(self):
self.SensorManager.registerListener(self, self.sensor,
SensorManager.SENSOR_DELAY_NORMAL)
def disable(self):
self.SensorManager.unregisterListener(self, self.sensor)
@java_method('(Landroid/hardware/SensorEvent;)V')
def onSensorChanged(self, event):
self.value = event.values[0]
@java_method('(Landroid/hardware/Sensor;I)V')
def onAccuracyChanged(self, sensor, accuracy):
pass
class AmbientTemperatureSensorListener(PythonJavaClass):
__javainterfaces__ = ['android/hardware/SensorEventListener']
def __init__(self):
super().__init__()
service = activity.getSystemService(Context.SENSOR_SERVICE)
self.SensorManager = cast('android.hardware.SensorManager', service)
self.sensor = self.SensorManager.getDefaultSensor(
Sensor.TYPE_AMBIENT_TEMPERATURE)
self.value = None
def enable(self):
self.SensorManager.registerListener(self, self.sensor,
SensorManager.SENSOR_DELAY_NORMAL)
def disable(self):
self.SensorManager.unregisterListener(self, self.sensor)
@java_method('(Landroid/hardware/SensorEvent;)V')
def onSensorChanged(self, event):
self.value = event.values[0]
@java_method('(Landroid/hardware/Sensor;I)V')
def onAccuracyChanged(self, sensor, accuracy):
pass
class AndroidHumidity(Humidity):
def __init__(self):
self.state = False
def _get_humidity(self):
if self.state:
m = 17.62
Tn = 243.12
Ta = 216.7
Rh = self.listener_r.value
Tc = self.listener_a.value
A = 6.112
K = 273.15
humidity = (Ta * (Rh / 100) * A * exp(m * Tc / (Tn + Tc))
/ (K + Tc))
return humidity
def _enable(self):
if not self.state:
self.listener_r = RelativeHumiditySensorListener()
self.listener_a = AmbientTemperatureSensorListener()
self.listener_r.enable()
self.listener_a.enable()
self.state = True
def _disable(self):
if self.state:
self.listener_r.disable()
self.listener_a.disable()
self.state = False
delattr(self, 'listener_r')
delattr(self, 'listener_a')
def instance():
return AndroidHumidity()
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