SDK Version 31 leads to an Error

[thomasklaush]

Error when using targetSDKVersion 31:

E/MethodChannel#flutter_nfc_kit(30191): Failed to handle method call E/MethodChannel#flutter_nfc_kit(30191): java.lang.IllegalArgumentException: com.xxxx.xxxxxx: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. E/MethodChannel#flutter_nfc_kit(30191): Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles. E/MethodChannel#flutter_nfc_kit(30191): at android.app.PendingIntent.checkFlags(PendingIntent.java:375) E/MethodChannel#flutter_nfc_kit(30191): at android.app.PendingIntent.getActivityAsUser(PendingIntent.java:458) E/MethodChannel#flutter_nfc_kit(30191): at android.app.PendingIntent.getActivity(PendingIntent.java:444) E/MethodChannel#flutter_nfc_kit(30191): at android.app.PendingIntent.getActivity(PendingIntent.java:408) E/MethodChannel#flutter_nfc_kit(30191): at im.nfc.flutter_nfc_kit.FlutterNfcKitPlugin.pollTag(FlutterNfcKitPlugin.kt:303) E/MethodChannel#flutter_nfc_kit(30191): at im.nfc.flutter_nfc_kit.FlutterNfcKitPlugin.handleMethodCall(FlutterNfcKitPlugin.kt:88) E/MethodChannel#flutter_nfc_kit(30191): at im.nfc.flutter_nfc_kit.FlutterNfcKitPlugin.onMethodCall(FlutterNfcKitPlugin.kt:62) E/MethodChannel#flutter_nfc_kit(30191): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233) E/MethodChannel#flutter_nfc_kit(30191): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:84) E/MethodChannel#flutter_nfc_kit(30191): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:865) E/MethodChannel#flutter_nfc_kit(30191): at android.os.MessageQueue.nativePollOnce(Native Method) E/MethodChannel#flutter_nfc_kit(30191): at android.os.MessageQueue.next(MessageQueue.java:335) E/MethodChannel#flutter_nfc_kit(30191): at android.os.Looper.loopOnce(Looper.java:161) E/MethodChannel#flutter_nfc_kit(30191): at android.os.Looper.loop(Looper.java:288) E/MethodChannel#flutter_nfc_kit(30191): at android.app.ActivityThread.main(ActivityThread.java:7839) E/MethodChannel#flutter_nfc_kit(30191): at java.lang.reflect.Method.invoke(Native Method) E/MethodChannel#flutter_nfc_kit(30191): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) E/MethodChannel#flutter_nfc_kit(30191): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)

[Harry-Chen]

@thomasklaush What version of this plugin are you using? Seems the stack trace in your log cannot correspond to code in our latest version v3.1.0.

[thomasklaush]

It is the latest version v3.1.0

When I change SDK to 31 in your example, it works (after adding in Manifest: android:exported="true") In my App i use it in a different way, polling every 10 seconds in a stream with while(1) and a delay.

This is to see if there is still a Tag or it got removed!

Then this must be the real problem.

[dangfan]

Would you kindly provide a reproducer?

[thomasklaush]

That's the current one, I still get the error sometimes from the try-catch in the catch statement. It's not working yet, but I'm on the way.

I want to have a Stream which reads the Tag every period to check if there is a Tag or not. So I can detect if there is a Tag (Add connect via BLE to the found ID), or if there isn't (and disconnect from BLE.

Earlier, I forgot the await statement in front of the finish() and the Timer war before finish() and poll() This was the overkill for the application.

@override
  Stream<dartz.Either<BleConnectionFailure, String>> getDIDStream() async* {
    logger.i('NFC is avaliable: $_nfcAvaliable');
    const Duration timeout = Duration(seconds: 15);
    Stream<dartz.Either<BleConnectionFailure, String>> nfcStream() async* {
      while (true) {
        const Duration timeout = Duration(seconds: 5);
        String deviceId = "";
        await Future.delayed(timeout, () => {});
        try {
          await FlutterNfcKit.finish();
          final NFCTag tag = await FlutterNfcKit.poll(timeout: timeout, androidPlatformSound: false);

          // read NDEF records if available
          if (tag.ndefAvailable) {
            for (final record in await FlutterNfcKit.readNDEFRecords(cached: false)) {
              if (record is ndef.TextRecord) {
                //logger.d(record.text);
                deviceId = record.text ?? "";
              }
            }
          }
          logger.e(deviceId);
          yield dartz.right(deviceId);
        } on Exception catch (e) {
          logger.e(e);
          yield dartz.right("");
        }
      }
    }

    yield* nfcStream();

[thomasklaush]

Failed to handle method call E/MethodChannel#flutter_nfc_kit(22539): java.lang.IllegalArgumentException: com.xxxx.xxxxx: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. E/MethodChannel#flutter_nfc_kit(22539): Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.

[thomasklaush]

The same code from you don't work with my app. It seems to be in combination of some Android System Messages, where the PendingIntend is used. Maybe the BLE Lib. I try to find a solution, but I can't say currently, which lib is causing the Platform Exception

E/MethodChannel#flutter_nfc_kit(17215): Failed to handle method call E/MethodChannel#flutter_nfc_kit(17215): java.lang.IllegalArgumentException: com.xxxxxxx.xxx: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. E/MethodChannel#flutter_nfc_kit(17215): Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles. E/MethodChannel#flutter_nfc_kit(17215): at android.app.PendingIntent.checkFlags(PendingIntent.java:375) E/MethodChannel#flutter_nfc_kit(17215): at android.app.PendingIntent.getActivityAsUser(PendingIntent.java:458) E/MethodChannel#flutter_nfc_kit(17215): at android.app.PendingIntent.getActivity(PendingIntent.java:444) E/MethodChannel#flutter_nfc_kit(17215): at android.app.PendingIntent.getActivity(PendingIntent.java:408) E/MethodChannel#flutter_nfc_kit(17215): at im.nfc.flutter_nfc_kit.FlutterNfcKitPlugin.pollTag(FlutterNfcKitPlugin.kt:303) E/MethodChannel#flutter_nfc_kit(17215): at im.nfc.flutter_nfc_kit.FlutterNfcKitPlugin.handleMethodCall(FlutterNfcKitPlugin.kt:88) E/MethodChannel#flutter_nfc_kit(17215): at im.nfc.flutter_nfc_kit.FlutterNfcKitPlugin.onMethodCall(FlutterNfcKitPlugin.kt:62) E/MethodChannel#flutter_nfc_kit(17215): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233) E/MethodChannel#flutter_nfc_kit(17215): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:84) E/MethodChannel#flutter_nfc_kit(17215): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:865) E/MethodChannel#flutter_nfc_kit(17215): at android.os.MessageQueue.nativePollOnce(Native Method) E/MethodChannel#flutter_nfc_kit(17215): at android.os.MessageQueue.next(MessageQueue.java:335) E/MethodChannel#flutter_nfc_kit(17215): at android.os.Looper.loopOnce(Looper.java:161) E/MethodChannel#flutter_nfc_kit(17215): at android.os.Looper.loop(Looper.java:288) E/MethodChannel#flutter_nfc_kit(17215): at android.app.ActivityThread.main(ActivityThread.java:7839) E/MethodChannel#flutter_nfc_kit(17215): at java.lang.reflect.Method.invoke(Native Method) E/MethodChannel#flutter_nfc_kit(17215): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)

[Harry-Chen]

@thomasklaush I searched around and it looks like a bug outside this plugin: https://stackoverflow.com/questions/68228666/targeting-s-version-10000-and-above-requires-that-one-of-flag-immutable-or-fl. Would this workaround work for your case?

implementation 'androidx.work:work-runtime-ktx:2.7.1'

[thomasklaush]

@Harry-Chen sorry, I have to change my answer. It does not work. Thank you anyway

[Harry-Chen]

@thomasklaush Happy to hear that!

[thomasklaush]

@dangfan @Harry-Chen the update to 3.2.0 resolved the issue! Thanks.