Python手机开发调用DLL实现部分ADB功能

python

近期学了一点Python,然后正好有一个手机同步工具方面的预研工作要完成。

要实现PC与手机的通信,首先要找到他们的通信协议,还好的是Android有完善的协议:ADB

ADB的代码是开源的,而且支持Windows平台,有现成的DLL可以调用:AdbWinApi.dll,AdbWinUsbApi.dll

好了,可以用VC搞定,但我想用Python试一下,于是开始了苦逼的查资料+实验的过程。

实验过程就不多说了,由于上面的两个DLL都是用C实现的,提供的头文件也是C语言的,所以有了下面这个python测试程序(Python2.7):

import ctypes 

#自定义的GUID结构,有兴趣的可以自己研究用uuid模块

class GUID(ctypes.Structure):

_fields_ = [("Data1", ctypes.c_ulong),

("Data2", ctypes.c_ushort),

("Data3", ctypes.c_ushort),

("Data4", ctypes.c_ubyte*8)]

#自己定义的一个结构体,便于使用DLL接口

class AdbInterfaceInfo(ctypes.Structure):

_fields_ = [("class_id", GUID),

("flags", ctypes.c_ulong),

("device_name", ctypes.c_wchar*800)]

def strGUID(GUID):

string = ""

string = string + "%x" % buff.class_id.Data1 + "-%x" % buff.class_id.Data2 + "-%x" % buff.class_id.Data3

string = string + "-%x" % buff.class_id.Data4[0]

string = string + "%x" % buff.class_id.Data4[1]

string = string + "%x" % buff.class_id.Data4[2]

string = string + "%x" % buff.class_id.Data4[3]

string = string + "%x" % buff.class_id.Data4[4]

string = string + "%x" % buff.class_id.Data4[5]

string = string + "%x" % buff.class_id.Data4[6]

string = string + "%x" % buff.class_id.Data4[7]

return string

dll = ctypes.cdll.LoadLibrary("AdbWinApi.dll")

usb_class_id = GUID(0xF72FE0D4, 0xCBCB, 0x407d, (0x88, 0x14, 0x9e, 0xd6, 0x73, 0xd0, 0xdd, 0x6b))

enum_handle = dll.AdbEnumInterfaces(usb_class_id, ctypes.c_bool("true"), ctypes.c_bool("true"), ctypes.c_bool("true"))

while(1):

buff = AdbInterfaceInfo()

size = ctypes.c_ulong(ctypes.sizeof(buff))

status = dll.AdbNextInterface(enum_handle, ctypes.byref(buff), ctypes.byref(size))

if status==1:

#print "GUID = " + strGUID(buff.class_id)

#print "status = " + str(status)

#print "Name = " + str(buff.device_name)

hAdbApi = dll.AdbCreateInterfaceByName(buff.device_name);

if hAdbApi == 0:

print "AdbCreateInterfaceByName Fail"

else:

serial = " "*128

pserial = ctypes.c_char_p()

pserial.value = serial

serial_len = ctypes.c_ulong(len(serial))

ret = dll.AdbGetSerialNumber(hAdbApi, pserial, ctypes.byref(serial_len), ctypes.c_bool("false"));

if ret == 1:

print "Device Name: " + "%s"% serial

else:

print "Get Device Name Fail"

else:

print "Finished"

break

import ctypes

#自定义的GUID结构,有兴趣的可以自己研究用uuid模块

class GUID(ctypes.Structure):

_fields_ = [("Data1", ctypes.c_ulong),

("Data2", ctypes.c_ushort),

("Data3", ctypes.c_ushort),

("Data4", ctypes.c_ubyte*8)]

#自己定义的一个结构体,便于使用DLL接口

class AdbInterfaceInfo(ctypes.Structure):

_fields_ = [("class_id", GUID),

("flags", ctypes.c_ulong),

("device_name", ctypes.c_wchar*800)]

def strGUID(GUID):

string = ""

string = string + "%x" % buff.class_id.Data1 + "-%x" % buff.class_id.Data2 + "-%x" % buff.class_id.Data3

string = string + "-%x" % buff.class_id.Data4[0]

string = string + "%x" % buff.class_id.Data4[1]

string = string + "%x" % buff.class_id.Data4[2]

string = string + "%x" % buff.class_id.Data4[3]

string = string + "%x" % buff.class_id.Data4[4]

string = string + "%x" % buff.class_id.Data4[5]

string = string + "%x" % buff.class_id.Data4[6]

string = string + "%x" % buff.class_id.Data4[7]

return string

dll = ctypes.cdll.LoadLibrary("AdbWinApi.dll")

usb_class_id = GUID(0xF72FE0D4, 0xCBCB, 0x407d, (0x88, 0x14, 0x9e, 0xd6, 0x73, 0xd0, 0xdd, 0x6b))

enum_handle = dll.AdbEnumInterfaces(usb_class_id, ctypes.c_bool("true"), ctypes.c_bool("true"), ctypes.c_bool("true"))

while(1):

buff = AdbInterfaceInfo()

size = ctypes.c_ulong(ctypes.sizeof(buff))

status = dll.AdbNextInterface(enum_handle, ctypes.byref(buff), ctypes.byref(size))

if status==1:

#print "GUID = " + strGUID(buff.class_id)

#print "status = " + str(status)

#print "Name = " + str(buff.device_name)

hAdbApi = dll.AdbCreateInterfaceByName(buff.device_name);

if hAdbApi == 0:

print "AdbCreateInterfaceByName Fail"

else:

serial = " "*128

pserial = ctypes.c_char_p()

pserial.value = serial

serial_len = ctypes.c_ulong(len(serial))

ret = dll.AdbGetSerialNumber(hAdbApi, pserial, ctypes.byref(serial_len), ctypes.c_bool("false"));

if ret == 1:

print "Device Name: " + "%s"% serial

else:

print "Get Device Name Fail"

else:

print "Finished"

break


上面这个简单的Python代码,可以通过AdbWinApi.dll和AdbWinUsbApi.dll这两个DLL来找到你PC上正连接着的Android设备。

只调用了3个DLL接口,但目的已经达到,可以得出下面的结论:

使用Python调用DLL的方式来实现ADB工具是可行的,当然麻烦是不会少的了。

写在最后,Python调用C写的DLL还是比较麻烦的,特别是参数传递,尤其是指针的处理,这方面还得依靠ctypes模块。。。


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