def is_android(filename):
if not filename:<EOL><INDENT>return None<EOL><DEDENT>with open(filename, "<STR_LIT:rb>") as fd:<EOL><INDENT>f_bytes = fd.read()<EOL>return is_android_raw(f_bytes)<EOL><DEDENT>return None<EOL>
Return the type of the file

        @param filename : the filename
        @rtype : "APK", "DEX", None