Null exception in _isAvailable whenever app moves to AppLifeCycleState paused

[robban112]

Hi,

We're getting null exception errors in _isAvailable function for Pixel Android phones for Widgets wrapped in KeyboardAction with enabled set to false.

The reason for this is that setConfig is never called in initState, leading to config being set to null. Then, whenever AppLifeCycleState switches, _isAvailable will be called which force unwraps config leading to the exception.

Thanks.

Related error in Sentry / Console:

[sentry.platformError] [error] Uncaught Platform Error [sentry.platformError] _TypeError (Null check operator used on a null value) [sentry.platformError] #0 KeyboardActionstate._isAvailable (package:keyboard_actions/keyboard_actions.dart:127:18) #1 KeyboardActionstate._focusChanged (package:keyboard_actions/keyboard_actions.dart:267:9) #2 KeyboardActionstate.didChangeAppLifecycleState (package:keyboard_actions/keyboard_actions.dart:457:9) #3 WidgetsBinding.handleAppLifecycleStateChanged (package:flutter/src/widgets/binding.dart:794:16) #4 List.forEach (dart:core-patch/growable_array.dart:416:8) #5 ServicesBinding._handleLifecycleMessage (package:flutter/src/services/binding.dart:263:15) #6 BasicMessageChannel.setMessageHandler.<anonymous closure> (package:flutter/src/services/platform_channel.dart:223:49) #7 _DefaultBinaryMessenger.setMessageHandler.<anonymous closure> (package:flutter/src/services/binding.dart:567:35) #8 _invoke2 (dart:ui/hooks.dart:344:13) #9 _ChannelCallbackRecord.invoke (dart:ui/channel_buffers.dart:45:5) #10 _Channel.push (dart:ui/channel_buffers.dart:135:31) #11 ChannelBuffers.push (dart:ui/channel_buffers.dart:343:17) #12 PlatformDispatcher._dispatchPlatformMessage (dart:ui/platform_dispatcher.dart:722:22) #13 _dispatchPlatformMessage (dart:ui/hooks.dart:257:31)

[minhtritc97]

same issue

[jalal-zy]

Any solutions?

[mhungo]

You can check again:

• enable: true

return KeyboardActions(
     config: _buildConfig(context),
     child: child,
     enable: true
)

if still not work try this(bad case) :

• Go to file: keyboard_actions

replace from :

  bool get _isAvailable {
    return config!.keyboardActionsPlatform == KeyboardActionsPlatform.ALL ||
        (config!.keyboardActionsPlatform == KeyboardActionsPlatform.IOS &&
            PlatformCheck.isIOS) ||
        (config!.keyboardActionsPlatform == KeyboardActionsPlatform.ANDROID &&
            PlatformCheck.isAndroid);
  }

to

  bool get _isAvailable {
    return config?.keyboardActionsPlatform == KeyboardActionsPlatform.ALL ||
        (config?.keyboardActionsPlatform == KeyboardActionsPlatform.IOS &&
            PlatformCheck.isIOS) ||
        (config?.keyboardActionsPlatform == KeyboardActionsPlatform.ANDROID &&
            PlatformCheck.isAndroid);
  }

Hope can help you!