how could i unzip an apk?

[0x41337]

well, I'm creating a tool that involves apk, and I can unzip the apk using unzip, however, I want to do it using dart, I made these functions for that, but it didn't work.

 bool apk2zip(String apkName) {
    try {
      print("(*) reading apk");
      final apk = File(apkName);

      print("(*) converting \"$apkName\" to zip");
      apk.copy(apkName.replaceAll(".apk", ".zip"));

      return true;
    } catch (e) {
      return false;
    }
  }

  bool unzipApk(String apkName) {
    try {
      apk2zip(apkName);
      print("(*) unzipping $apkName");
      String apkFinal = apkName.replaceAll(".apk", ".zip");

      final bytes = File(apkFinal).readAsBytesSync();
      final archive = ZipDecoder().decodeBytes(bytes);

      for (final file in archive) {
        final filename = file.name;
        if (file.isFile) {
          final data = file.content as List<int>;
          File('$apkFinal-files/' + filename)
            ..createSync(recursive: true)
            ..writeAsBytesSync(data);
        } else {
          Directory('$apkFinal-files/' + filename).create(recursive: false);
        }
      }
      return true;
    } catch (e) {
      print(e);
      return false;
    }
  }

expected:

$ ls
zap.apk zap.zip zap-files

what i get:

$./mytool zap.apk
(*) reading apk
(*) converting "zap.apk" to zip
(*) unzipping zap.apk
FormatException: Could not find End of Central Directory Record

how could i do that, sorry for the dirty code, i'll still do the lint.

[0x41337]

@brendan-duncan ?

[0x41337]

I closed insue, due to timeout in the response.