在做Android逆向的時候，dex檔案轉成smail檔案之後，需要查詢哪個smail檔案中包含的關鍵字。下面這段程式碼：

findCount為查詢到的檔案個數

findId為要查詢的內容

findDir為要查詢的資料夾

#encoding: utf-8
import os

findCount = 0
findId = "QString"
findDir = "F:\\calc"

resultFile = os.path.join(findDir,"result.txt")


def writeResultAndPrint(fullPath):
    print (fullPath)
    file = open(resultFile,'a')
    file.write(fullPath)
    file.write("\n")
    file.close()


def findKey(fullPath):
    file = open(fullPath,'r')
    content = file.read()
    file.close()

    isExist = content.find(findId)
    if isExist > 0:
        global findCount
        findCount = findCount + 1
        writeResultAndPrint(fullPath)



def findFiles():
    for dirPath,dirNames,fileNames in os.walk(findDir):
        for file in fileNames:
            fullPath = os.path.join(dirPath,file)
            findKey(fullPath)


    print("找到了字串個數=" + str(findCount))

def clean():
    if os.path.exists(resultFile):
        os.remove(resultFile)

clean()
findFiles()