使用SL4A(Python)和蓝牙

Question

寻找一些让我入门的建议.

在我的左手中,我有一个运行ICS的SGS2.我已经启动并运行了SL4A并安装了Python 2.6.2

在我的右手中,我有一个通用的中国蓝牙RFID阅读器.它工作,它读取标签(它有一个显示器),它与手机配对.

我希望他们玩得很好 - 我想编写一些能够继续观看设备并在传输时捕获代码的脚本.

我不是Python专家,但我已经使用它一段时间在Web服务器上构建简单的I/O作业,所以我可以找到自己的方法.

不同寻常的是,我遇到了实际问题 - 我找不到任何"开始使用蓝牙和SL4A"资源来克服建立持久连接和监控输出的第一步.

有小费吗？

Answer 1

看来你需要的是蓝牙外观.以下是一些与蓝牙相关的命令,可能对您有所帮助:

bluetoothAccept
bluetoothActiveConnections
bluetoothConnect
bluetoothDiscoveryCancel
bluetoothDiscoveryStart
bluetoothGetConnectedDeviceName
bluetoothGetLocalAddress
bluetoothGetLocalName
bluetoothGetRemoteDeviceName
bluetoothGetScanMode
bluetoothIsDiscovering
bluetoothMakeDiscoverable
bluetoothRead
bluetoothReadBinary
bluetoothReadLine
bluetoothReadReady
bluetoothSetLocalName
bluetoothStop
bluetoothWrite
bluetoothWriteBinary
checkBluetoothState
toggleBluetoothState

要调用这些命令中的任何一个,你会做类似的事情

import android
droid = android.Android()
#call your commands with droid.bluetoothcommand
droid.bluetoothDiscoveryStart()
#or
droid.toggleBluetoothState(True)

以下是一些蓝牙功能的示例,它包含在SL4A中,但为了清晰起见,我添加了注释:

import android #for bluetooth functions
import time #for waiting

#get everything setup
droid = android.Android()

#turn on bluetooth
droid.toggleBluetoothState(True)

#ask user
droid.dialogCreateAlert('Be a server?')
droid.dialogSetPositiveButtonText('Yes')
droid.dialogSetNegativeButtonText('No')
droid.dialogShow()

#get user response to question
result = droid.dialogGetResponse()

#if the result is 'Yes' ('positive') then is_server is set to True
is_server = result.result['which'] == 'positive'

if is_server:
  #so if is_server is true make the device discoverable and accept the next connection
  droid.bluetoothMakeDiscoverable()
  droid.bluetoothAccept()
else:
  #attempts to connect to a device over bluetooth, the logic being that if the phone
  #is not receiving a connection then the user is attempting to connect to something
  droid.bluetoothConnect()


if is_server:
  result = droid.getInput('Chat', 'Enter a message').result #Gets a message to send 
  #via bluetooth
  if result is None:
    droid.exit() #exit if nothing is in the message
  droid.bluetoothWrite(result + '\n') #otherwise write the message

while True: #receives a message
  message = droid.bluetoothReadLine().result
  droid.dialogCreateAlert('Chat Received', message)
  droid.dialogSetPositiveButtonText('Ok')
  droid.dialogShow()
  droid.dialogGetResponse()
  result = droid.getInput('Chat', 'Enter a message').result
  if result is None:
    break
  droid.bluetoothWrite(result + '\n')

droid.exit()

最后,有关蓝牙命令的完整列表,请查看http://code.google.com/p/android-scripting/wiki/ApiReference并向下滚动至蓝牙外观.祝你好运!