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link管理  ›  Attempt to invoke interface method 'boolean android.content.SharedPreferences.contains(java.lang.Str
https://github.com/mogol/flutter_secure_storage/issues/380
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1 月前

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Already on GitHub? Sign in to your account Attempt to invoke interface method 'boolean android.content.SharedPreferences.contains(java.lang.String)' Attempt to invoke interface method 'boolean android.content.SharedPreferences.contains(java.lang.String)' tahitiangabriel opened this issue Mar 15, 2022 · 58 comments · Fixed by #508

PlatformException(Exception encountered, read, java.lang.NullPointerException: Attempt to invoke interface method 'boolean android.content.SharedPreferences.contains(java.lang.String)' on a null object reference at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin$b.run(SourceFile:24) at android.os.Handler.handleCallback(Handler.java:938) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:246) at android.os.HandlerThread.run(HandlerThread.java:67) , null)

This issue was supposed to be fixed with #332 , but is still hapenning in 5.0.2

Only Android devices are affected by this issue.

I encountered a similar error. What I did was disabling backup in my AndroidManifest.xml: 

        <application
            android:allowBackup="false"
            android:fullBackupContent="false">

Hi everyone! I've been having this issue as well. As @tahitiangabriel say, it's mentioned in #332 but also in #53 . This last one is the most similar to my error, as the people updating the app are getting this error that leaves the APP totally broken.

It seems that 5.0.2 is not resolving these issues as it appears that there are people reopening and commenting on these issues. In my case, not everybody gets the error, it's like 50/50, don't know if it may be linked to SO versions, iOS, Android or what...

I will try to add a button to "Clear cache" or automatically deleteKeys on error to see if it works but definitely is not the best option... Let's see if we find a solution soon 😢

@dustincatap Could you explain your solution and why should work? Don't know why backup could be causing trouble in here. Thanks! 

E/FlutterSecureStoragePl( 6611): EncryptedSharedPreferences initialization failed
E/FlutterSecureStoragePl( 6611): com.google.crypto.tink.shaded.protobuf.InvalidProtocolBufferException: Protocol message contained an invalid tag (zero).
E/FlutterSecureStoragePl( 6611): 	at com.google.crypto.tink.shaded.protobuf.y.K(GeneratedMessageLite.java:10)
E/FlutterSecureStoragePl( 6611): 	at com.google.crypto.tink.shaded.protobuf.y.H(GeneratedMessageLite.java:2)
E/FlutterSecureStoragePl( 6611): 	at p4.c0.X(Keyset.java:1)
E/FlutterSecureStoragePl( 6611): 	at m4.d.a(SharedPrefKeysetReader.java:1)
E/FlutterSecureStoragePl( 6611): 	at i4.b.a(CleartextKeysetHandle.java:1)
E/FlutterSecureStoragePl( 6611): 	at m4.a$b.e(AndroidKeysetManager.java:4)
E/FlutterSecureStoragePl( 6611): 	at m4.a$b.f(AndroidKeysetManager.java:1)
E/FlutterSecureStoragePl( 6611): 	at m4.a$b.d(AndroidKeysetManager.java:3)
E/FlutterSecureStoragePl( 6611): 	at z0.a.b(EncryptedSharedPreferences.java:8)
E/FlutterSecureStoragePl( 6611): 	at z0.a.a(EncryptedSharedPreferences.java:1)
E/FlutterSecureStoragePl( 6611): 	at g7.d.s(FlutterSecureStoragePlugin.java:7)
E/FlutterSecureStoragePl( 6611): 	at g7.d.p(FlutterSecureStoragePlugin.java:8)
E/FlutterSecureStoragePl( 6611): 	at g7.d.b(FlutterSecureStoragePlugin.java:1)
E/FlutterSecureStoragePl( 6611): 	at g7.d$b.run(FlutterSecureStoragePlugin.java:23)
E/FlutterSecureStoragePl( 6611): 	at android.os.Handler.handleCallback(Handler.java:938)
E/FlutterSecureStoragePl( 6611): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/FlutterSecureStoragePl( 6611): 	at android.os.Looper.loopOnce(Looper.java:201)
E/FlutterSecureStoragePl( 6611): 	at android.os.Looper.loop(Looper.java:288)
E/FlutterSecureStoragePl( 6611): 	at android.os.HandlerThread.run(HandlerThread.java:67)
E/flutter ( 6611): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: PlatformException(Exception encountered, read, java.lang.NullPointerException: Attempt to invoke interface method 'boolean android.content.SharedPreferences.contains(java.lang.String)' on a null object reference
E/flutter ( 6611): 	at g7.d$b.run(FlutterSecureStoragePlugin.java:24)
E/flutter ( 6611): 	at android.os.Handler.handleCallback(Handler.java:938)
E/flutter ( 6611): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/flutter ( 6611): 	at android.os.Looper.loopOnce(Looper.java:201)
E/flutter ( 6611): 	at android.os.Looper.loop(Looper.java:288)
E/flutter ( 6611): 	at android.os.HandlerThread.run(HandlerThread.java:67)
E/flutter ( 6611): , null)
E/flutter ( 6611): #0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:607)
E/flutter ( 6611): #1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:177)
E/flutter ( 6611): <asynchronous suspension>
E/flutter ( 6611): #2      main (package:ddv_loyalty/main.dart:37)
E/flutter ( 6611): <asynchronous suspension>
E/flutter ( 6611): 

version 5.0.2 still error when build app release mode

          
You are getting


E/FlutterSecureStoragePl( 6611): EncryptedSharedPreferences initialization failed


Initialization failed does not seem to be the same case that we are exposing here. Are you sure that you've reloaded properly your app after installing the library?

          
I had this same error appear to me in a very specific scenario. I hope this report will bring some light in the issue.


My app was working fine during development until I tried to uninstall and install it again to be sure that everything was going to work properly. Then the error occurred.  I was using the --release flag on build.


It seems to only happen on Android 11 (tried on two Xiaomi Mi 10T and on Samsung A31) on my code. I tried to reproduce this scenario on other Android versions (6, 9 and 12) but everything is running smoothly, even after reinstalling the app.


Firebase Crashlytics reports the error happening when I call .containsKey or .read when trying to read previously stored user data to determine whether to show Login Page or the main route.

          
@lucianosb


I solved this problem.


If your versions upper 5.0.0 & it was build to release mode, try to this code.


storage.read(key: 'key')

storage.read(key: 'key', aOption: AndroidOptions(encryptedSharedPreferences: true,)

          
I've tried #380 (comment) and also an update to 6.0.0 but the main issue is still pressent.


@mogol For now this is blocker for our app :(

          
@mogol Same thing. allowBackup is false, fullBackupContent is false, aOption: AndroidOptions(encryptedSharedPreferences: true,) is on every call.

The exception is happening on devices using Android 10 and above.

I'm mostly getting it when accessing EncryptedSharedPreferences during background work (using workmanager).


This issue is completely preventing users from using the app. Could share some thoughts on what the issue could be ? It clearly has to do with getting the app's context.

          
One of my users unblocked himself by Force stopping the app then clearing data & cache. Didn't work for others but I have no way of knowing if they proceeded correctly or if this is really what unlocked that one user.


So it seems forcing a deletion solves the problem. Any way of doing this reliably @mogol ?

          
Alright, seem I'm getting contacted at least once a day by a user with this issue, I'm going to have to drop this package.


@mogol Please put a warning for the use of EncryptedSharedPreferences with this package. It is not stable and such a warning would have saved me a whole lot of trouble.

Best of luck man.

          
I solved this problem with


static AndroidOptions _getAndroidOptions() => const AndroidOptions(

keyCipherAlgorithm: KeyCipherAlgorithm.RSA_ECB_OAEPwithSHA_256andMGF1Padding,

storageCipherAlgorithm: StorageCipherAlgorithm.AES_GCM_NoPadding,

          
Any update in that topic? We are having few crashes on the daily basis. The error message looks similar:


java.lang.NullPointerException: Attempt to invoke interface method 'android.content.SharedPreferences$Editor android.content.SharedPreferences.edit()' on a null object reference


We are using encryptedSharedPreferences option enabled.


We are having this issue on the Android platform only - it's not related to iOS. As far as I know, the Android removes the data from the encrypted preferences once app is uninstalled.


Not sure. What if the manifest has android:allowBackup="true"?

          
same here, for write, read and delete

one of my crashlytics logs in production


Non-fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: PlatformException(Exception encountered, write, java.lang.NullPointerException: Attempt to invoke interface method 'android.content.SharedPreferences$Editor android.content.SharedPreferences.edit()' on a null object reference
	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.write(FlutterSecureStoragePlugin.java:197)
	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.access$300(FlutterSecureStoragePlugin.java:37)
	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin$MethodRunner.run(FlutterSecureStoragePlugin.java:289)
	at android.os.Handler.handleCallback(Handler.java:938)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:223)
	at android.os.Looper.loop(Looper.java:317)
	at android.os.HandlerThread.run(HandlerThread.java:67)
, null). Error thrown [PLATFORM-EXCEPTION] - STORAGE-SERVICE:WRITE.

Flutter 2.10.5

Storage 5.0.2

          
The root issue is for some reason the shared preferences instance fails to create but the error is swallowed and ignored. We need to forward the error to dart so we can catch it and see what’s happening.

I’m still not sure how to reproduce the issue but if someone creates a PR to add more logging like that maybe we can finally get to the bottom of it.


I solved this problem with


static AndroidOptions _getAndroidOptions() => const AndroidOptions( keyCipherAlgorithm: KeyCipherAlgorithm.RSA_ECB_OAEPwithSHA_256andMGF1Padding, storageCipherAlgorithm: StorageCipherAlgorithm.AES_GCM_NoPadding, );


This really works but I don't know how. The interesting thing I have to mention is: this happens somehow randomly on a development device I used to test for year without any issue and then, once day it appears :D. No upgrade OS, nothing. Weird.


UPDATED: I got it again on the same device after a while. Not update anything.

          
This might have something to do with isolates, referenced here and calling DartPluginRegistrant.ensureInitialized(), which will run all Dart plugin registration or this on older versions of Flutter:


if (Platform.isAndroid) SharedPreferencesAndroid.registerWith();
if (Platform.isIOS) SharedPreferencesIOS.registerWith();
          
Same issue here, the stacktrace is the following:


Plugin version is 6.1.0.


Fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: PlatformException(Exception encountered, read, java.lang.NullPointerException: Attempt to invoke interface method 'boolean android.content.SharedPreferences.contains(java.lang.String)' on a null object reference
	at com.it_nomads.fluttersecurestorage.FlutterSecureStorage.containsKey(FlutterSecureStorage.java:55)
	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin$MethodRunner.run(FlutterSecureStoragePlugin.java:155)
	at android.os.Handler.handleCallback(Handler.java:955)
	at android.os.Handler.dispatchMessage(Handler.java:102)
	at android.os.Looper.loopOnce(Looper.java:206)
	at android.os.Looper.loop(Looper.java:296)
	at android.os.HandlerThread.run(HandlerThread.java:67)
, null). Error thrown Caught error in a guarded zone..
       at StandardMethodCodec.decodeEnvelope(message_codecs.dart:653)
       at MethodChannel._invokeMethod(platform_channel.dart:296)
       at UserRepository.getUser(user_repository.dart:99)
       at new SplashBloc.<fn>.<fn>(splash_bloc.dart:22)
       at new SplashBloc.<fn>(splash_bloc.dart:18)
       at Bloc.on.<fn>.handleEvent(bloc.dart:226)
          
Hi there, I am facing the same issues with android 11 devices.

is there any solution to tackle this problem?

the package version is 7.0.1.

flutter version is 3.3.10


  • Uninstall apps
    • 

  • Install apps from play store again.
    • 

  • Open apps, and when apps call the "read" method will catch this error.
    • 

    I feel like this happened to me too..
    

    flutter: 3.3.10
    
package: 7.0.1
    
Android: 12
    
Model: Galaxy S10
    

    Not sure if this is helpful information: I'm accessing the plugin before the the runApp is executed.
    

    void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  DartPluginRegistrant.ensureInitialized();
  SystemChrome.setEnabledSystemUIMode(
    SystemUiMode.manual,
    overlays: [
      SystemUiOverlay.bottom,
      SystemUiOverlay.top,
  SystemChrome.setPreferredOrientations([
    DeviceOrientation.portraitUp,
  var XxxxRepository = new XxxxRepository();
  await Future.wait([
    XxxxRepositry.init(),
  runApp(App());

    PlatformException(Exception encountered, read, java.lang.NullPointerException: Attempt to invoke interface method 'boolean android.content.SharedPreferences.contains(java.lang.String)' on a null object reference
	at c4.a.b(Unknown Source:5)
	at c4.e$b.run(Unknown Source:221)
	at android.os.Handler.handleCallback(Handler.java:938)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:226)
	at android.os.Looper.loop(Looper.java:313)
	at android.os.HandlerThread.run(HandlerThread.java:67)
, null). Error thrown null.
       at StandardMethodCodec.decodeEnvelope(message_codecs.dart:653)
       at MethodChannel._invokeMethod(platform_channel.dart:296)
       at XxxxDataProvider.readToken(xxxx_data_provider.dart:13)
       at XxxxRepositoryImpl.init(xxxx_repository_impl.dart:22)
       at Future.wait.<fn>(wait.java)
       at .bootstrap(bootstrap.dart:62)
       at .main(main.dart:80)
          
    We encountered the issue every time on a specific Samsung phone.
    

    During the investigation, I found that the Android code has baaaad behavior if it fails to create the encrypted preferences. No fallback is used then and that caused the NullPointerExceptions.
    

    I created a PR to fix the issue:
    

    For us, the fallback works as expected now.
    

    If any of you need it right now you can use:
    

    dependency_overrides:
  flutter_secure_storage:
    git:
      url: https://github.com/jonasbark/flutter_secure_storage.git
      path: flutter_secure_storage
    




    

    
          
    @mogol I am re-iterating my advice from this comment on putting a warning on this package about the use of EncryptedSharedPreferences. This package is widely known and lots of devs will start using it only to later run into this bug. Putting up a warning about this specific use case could save a lot of people (literally all of us in this thread) from having bad problems with their app.
    

    I have personally switched from this to using flutter_keychain, which has a much simpler implementation (though only stores string, but that's not really a problem) and I have encountered 0 problems with it so far.
    
          
    We are facing and similar issue where application is not working when we generate build using appbundle but works when we generate build using apk.
    
It is not working only on specific Samsung device (android 33)
    

    Any solution? we are stucked and waiting for the solution. tried to apply @jonasbark solution but did not help
    

    Thanks
    
  kamilzajacdeviniti, techouse, lucianosb, Adam-D-Lewis, enzodanjour, and DavidIjsud reacted with thumbs up emoji
  techouse reacted with rocket emoji
    All reactions
          
    @DavidIjsud
    
So far, only Android 11, and just a handful of times. Debugging is a bit hard there, this is an internal enterprise app, so not a lot of users - and hard to get logs :/
    
But I know of 2 instances where I was able to verify that I've seen this bug again, with 8.0.0
    

    [ build/release mode ]
    
i have same issue on some specify device .
    
my phone realm* android 10 its work,
    
but my security engineer using same device its happen
    

    flutter_secure_storage: ^5.0.2

     flutter doctor -v
[✓] Flutter (Channel stable, 3.13.0, on macOS 14.0 23A344 darwin-arm64, locale en-ID)
    • Flutter version 3.13.0 on channel stable at /Users/yogiarifwidodo/dev/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision efbf63d9c6 (8 weeks ago), 2023-08-15 21:05:06 -0500
    • Engine revision 1ac611c64e
    • Dart version 3.1.0
    • DevTools version 2.25.0
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at /Users/yogiarifwidodo/Library/Android/sdk
    • Platform android-33, build-tools 30.0.3
    • ANDROID_HOME = /Users/yogiarifwidodo/Library/Android/sdk
    • Java binary at: /Library/Java/JavaVirtualMachines/zulu-11.jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment Zulu11.48+21-CA (build 11.0.11+9-LTS)
    • All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 14.3.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 14E300c
    • CocoaPods version 1.11.0
[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/macos#android-setup for detailed instructions).
[✓] VS Code (version 1.83.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.74.0
[✓] Connected device (2 available)
    • macOS (desktop) • macos  • darwin-arm64   • macOS 14.0 23A344 darwin-arm64
    • Chrome (web)    • chrome • web-javascript • Google Chrome 117.0.5938.149
[✓] Network resources
    • All expected network resources are available.
! Doctor found issues in 1 category.
     
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