Python手机开发调用DLL实现部分ADB功能

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。。。

来源：PY学习网：原文地址：https://www.py.cn/article.html