Return the files inside the APK with their associated types (by using python-magic)

        At the same time, the CRC32 are calculated for the files.

        :rtype: a dictionnary

def get_files_types(self):
        """
        Return the files inside the APK with their associated types (by using python-magic)

        At the same time, the CRC32 are calculated for the files.

        :rtype: a dictionnary
        """
        if self._files == {}:
            # Generate File Types / CRC List
            for i in self.get_files():
                buffer = self._get_crc32(i)
                self._files[i] = self._get_file_magic_name(buffer)

        return self._files