('getApkPackageInfo Error. ', ValueError('chr() arg not in range(256)',))

[ohyeah521]

when i run this command

ap = apk.APK(filename)

it show error like this.
('getApkPackageInfo Error. ', ValueError('chr() arg not in range(256)',))

i found the problems.

in this file. stringblock.py

def getRaw(self, idx):
    print("YYYYYYYYYYYYYYYYYYYYYYYYYYYY getRaw %s \n" % idx)
    if idx < 0 or self.m_stringOffsets == [] or idx >= len(self.m_stringOffsets):
        return None

    offset = self.m_stringOffsets[ idx ].get_value()
    length = self.getShort(self.m_strings, offset)

    data = ""
    print "length = ", length
    while length > 0:
        offset += 2
        # Unicode character
        print "self.getShort = ", self.getShort(self.m_strings, offset)
        data += chr(self.getShort(self.m_strings, offset))

        # FIXME
        if data[-1] == "&":
            data = data[:-1]

        length -= 1

    return data

can not resolve unicode.

[corcoran]

We're using this at XDA and found this issue in APKs being uploaded using Android Studio 3.0 and all the new updated build tools.

[yakov116]

@antitree if you would have a fix for us it would be great.

[antdking]

Working on a fix with XDA.
Issue is caused by StringBlock not accounting for different alignments when packaged in UTF8 mode.

Until a fix is released, does anyone have a suggestion for how to force packing in utf16 mode (as was the default before)?

Working:

>>> struct.unpack('<L', b[24:28])[0]
0

Not working:

>>> struct.unpack('<L', a[24:28])[0]
256

[gonjay]

    def getRaw(self, idx):

        if idx < 0 or self.m_stringOffsets == [] or idx >= len(self.m_stringOffsets):
            return None

        offset = self.m_stringOffsets[ idx ].get_value()
        length = self.getByte(self.m_strings, offset)
        offset += 1
        isansi = self.getByte(self.m_strings, offset)

        data = ""

        while length > 0:
            if isansi==0:
                # Unicode character
                offset += 2
                data += unichr(self.getShort(self.m_strings, offset))
            else:

                #multibyte
                offset += 1
                data += unichr(self.getByte(self.m_strings, offset))
                

            # FIXME
            if data[-1] == "&":
                data = data[:-1]

            length -= 1
        return data
        
    def getByte(self, array, offset):
        value = array[offset / 4].get_value()
        offset%=4
        if offset == 0:
            return value & 0xFF
        if offset == 1:
            return (value>>8) & 0xFF
        if offset == 2:
            return (value>>16) & 0xFF
        if offset == 3:
            return (value>>24) & 0xFF

http://blog.csdn.net/lzf_china/article/details/8069056

[corcoran]

I would recommend checking out androguard if you want a more actively developed APK parser in python.

https://github.com/androguard/androguard

[codeskyblue]

I finally with this method.

If you use python2 need to change file ``axmlparserpy/stringblock.py +L89`

Origin

data += chr(self.getShort(self.m_strings, offset))

To

data += unichr(self.getShort(self.m_strings, offset))