如何在Kivy中将android.bluetooth.socket输入流转换为python？

Question

我在开发Kivy应用程序。

因为我想从蓝牙适配器获得数据，所以我使用了下面的代码。

from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.scatter import Scatter
from kivy.properties import ObjectProperty,NumericProperty
from kivy.clock import Clock
from kivy.lang import Builder
from jnius import cast,autoclass
from kivy.logger import Logger

BluetoothAdapter = autoclass('android.bluetooth.BluetoothAdapter')
bufferedreader = autoclass('android.bluetooth.BluetoothAdapter')
BluetoothDevice = autoclass('android.bluetooth.BluetoothDevice')
BluetoothSocket = autoclass('android.bluetooth.BluetoothSocket')
InputStreamReader = autoclass('java.io.InputStreamReader')
BufferedReader = autoclass('java.io.BufferedReader')
UUID = autoclass('java.util.UUID')
StringBuilder = autoclass('java.lang.StringBuilder')

Builder.load_string('''
<bluetooth>:
    Button:
        pos:root.width/3,root.height/2
        text: root.data
        size: (300,100)


''')

class bluetooth(Scatter):
    socket = ObjectProperty(None,allownone = True)
    data = ObjectProperty('getting data',allownone = True)
    recv = ObjectProperty(None,allownone = True)
    counter = NumericProperty(0)

    def change_data(self,dt):
        Logger.info('Im in the change_data!!')
        self.data = 'change_data'
        paired_devices = BluetoothAdapter.getDefaultAdapter().getBondedDevices().toArray()
        for device in paired_devices:
            self.data = str(device.getName())
            Logger.info('Im in the loop!!'+str(device))
            if device.getName() == 'HC-06':

                self.socket = device.createRfcommSocketToServiceRecord(UUID.fromString('00001101-0000-1000-8000-00805F9B34FB'))
                bufferedreader = BufferedReader(InputStreamReader(self.socket.getInputStream(),"UTF-8"))

                StringBuilder.append(bufferedreader.read())
                self.data = StringBuilder.toString()

        #if self.socket == None:
        #   pass
        #else:
        #   self.socket.connect()
class myApp(App):
    def build(self):
        bt = bluetooth()
        Clock.schedule_interval(bt.change_data,1)
        return bt
myApp().run()

也许我漏掉了一些代码..。我无法找到如何将bluetooth.socket输入流获取到python。有人能帮忙吗？

Answer 1

我终于找到了一个似乎可行的解决办法。我有一个Kivy应用程序与一个基于Arduino的设备通过蓝牙通信。在Arduino上，我使用SerialCommand库接收自定义命令并作出相应的响应。当命令在主线程中发送给我的Arduino时，我有一个带有循环的第二个线程，它从我的蓝牙套接字中读取InputStream。来自Arduino的响应包含在<>中，当我得到适当的响应时，我提取括号之间的文本并将其发送到我的主线程中的一个函数。我希望这对你有帮助。

from kivy.clock import mainthread
import threading
import jnius

def get_socket_stream(self, name):
    paired_devices =  self.BluetoothAdapter.getDefaultAdapter().getBondedDevices().toArray()
    socket = None
    for device in paired_devices:
        if device.getName() == name:
            socket = device.createRfcommSocketToServiceRecord(
            self.UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"))
            reader = self.InputStreamReader(socket.getInputStream(), 'US-ASCII')
            recv_stream = self.BufferedReader(reader)
            send_stream = socket.getOutputStream()
            break
    socket.connect()
    return recv_stream, send_stream

def connect(self, *args):
    device = self.config.get('bluetooth', 'bt_name')
    try:
        self.recv_stream, self.send_stream = self.get_socket_stream(device)
    except AttributeError as e:
        print e.message
        return False
    except jnius.JavaException as e:
        print e.message
        return False
    except:
        print sys.exc_info()[0]
        return False

    threading.Thread(target=self.stream_reader).start()

def stream_reader(self, *args):
    stream = ''
    while True:
        if self.stop.is_set():
            jnius.detach()
            return
        if self.recv_stream.ready():
            try:
                stream = self.recv_stream.readLine()
            except self.IOException as e:
                print "IOException: ", e.message
            except jnius.JavaException as e:
                print "JavaException: ", e.message
            except:
                print "Misc error: ", sys.exc_info()[0]

            try:
                start = stream.rindex("<") + 1
                end = stream.rindex(">", start)
                self.got_response(stream[start:end])
            except ValueError:
                pass

@mainthread
def got_response(self, response):
    do something...