Exception java.lang.RuntimeException: Unable to create service io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingBackgroundService: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
  at android.app.ActivityThread.handleCreateService (ActivityThread.java:4823)
  at android.app.ActivityThread.access$3000 (ActivityThread.java:260)
  at android.app.ActivityThread$H.handleMessage (ActivityThread.java:2470)
  at android.os.Handler.dispatchMessage (Handler.java:110)
  at android.os.Looper.loop (Looper.java:219)
  at android.app.ActivityThread.main (ActivityThread.java:8668)
  at java.lang.reflect.Method.invoke
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:513)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1109)
Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
  at io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingBackgroundExecutor.getPluginCallbackHandle (FlutterFirebaseMessagingBackgroundExecutor.java:275)
  at io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingBackgroundExecutor.startBackgroundIsolate (FlutterFirebaseMessagingBackgroundExecutor.java:116)
  at io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingBackgroundService.onCreate (FlutterFirebaseMessagingBackgroundService.java:106)
  at android.app.ActivityThread.handleCreateService (ActivityThread.java:4809)
Flutter doctor
Run flutter doctor and paste the output below:
Click To Expand
[✓] Flutter (Channel unknown, 3.0.5, on macOS 12.1 21C52 darwin-x64, locale zh-Hans-CN)
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0-rc4)
[✓] Xcode - develop for iOS and macOS (Xcode 13.2.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2021.2)
[✓] IntelliJ IDEA Ultimate Edition (version 2022.2)
[✓] VS Code (version 1.70.0)
[✓] Connected device (2 available)
[✓] HTTP Host Availability
Flutter dependencies
Run flutter pub deps -- --style=compact and paste the output below:
Click To Expand
Dart SDK 2.17.6
Flutter SDK 3.0.5
connectapp 1.0.0+1
dependencies:
- async 2.8.2 [collection meta]
- awsome_video_player 0.0.1 [flutter video_player visibility_detector orientation connectivity flutter_screen_wake]
- azlistview 2.0.0 [flutter scrollable_positioned_list]
- bot_toast 4.0.3 [flutter]
- characters 1.2.0
- chewie 1.2.2 [cupertino_icons flutter provider video_player wakelock]
- connectivity_for_web 0.4.0+1 [connectivity_platform_interface flutter_web_plugins flutter]
- crypto 3.0.2 [typed_data]
- cupertino_icons 1.0.5
- device_info 2.0.3 [flutter device_info_platform_interface]
- event_bus 2.0.0
- file_picker 4.6.1 [flutter flutter_web_plugins flutter_plugin_android_lifecycle plugin_platform_interface ffi path win32]
- firebase_core 1.20.0 [firebase_core_platform_interface firebase_core_web flutter meta]
- firebase_crashlytics 2.8.6 [firebase_core firebase_core_platform_interface firebase_crashlytics_platform_interface flutter stack_trace]
- firebase_messaging 11.4.4 [firebase_core firebase_core_platform_interface firebase_messaging_platform_interface firebase_messaging_web flutter meta]
- firebase_performance 0.8.2+1 [firebase_core firebase_core_platform_interface firebase_performance_platform_interface firebase_performance_web flutter]
- firebase_remote_config 2.0.13 [firebase_core firebase_core_platform_interface firebase_remote_config_platform_interface firebase_remote_config_web flutter]
- fluro 2.0.3 [flutter]
- flutter 0.0.0 [characters collection material_color_utilities meta vector_math sky_engine]
- flutter_animator 3.2.2 [flutter vector_math]
- flutter_cupertino_localizations 1.0.1 [flutter flutter_localizations]
- flutter_datetime_picker 1.5.1 [flutter]
- flutter_dotenv 5.0.2 [flutter]
- flutter_easyrefresh 2.2.2 [flutter]
- flutter_genius_scan 4.5.2 [flutter]
- flutter_image_compress 1.1.1 [flutter]
- flutter_localizations 0.0.0 [flutter intl characters clock collection material_color_utilities meta path vector_math]
- flutter_rating_bar 4.0.1 [flutter]
- flutter_staggered_grid_view 0.4.1 [flutter]
- flutter_swiper_null_safety 1.0.2 [flutter]
- flutter_widget_from_html_core 0.8.5+3 [csslib flutter fwfh_text_style html]
- fluttertoast 8.0.9 [flutter flutter_web_plugins]
- get 4.6.5 [flutter]
- heic_to_jpg 0.2.0 [flutter]
- html 0.15.0 [csslib source_span]
- image_gallery_saver 1.7.1 [flutter]
- intl 0.17.0 [clock path]
- json_annotation 4.6.0 [meta]
- la_liveroom 0.0.1 [flutter]
- la_multi_media_picker 0.0.3 [flutter]
- la_route 0.0.1 [flutter package_info]
- la_theme 0.0.4 [flutter]
- la_unity 0.0.1 [flutter]
- lingoace_package_account 0.0.1 [flutter lingoace_package_net json_annotation lingoace_package_sp_cache lingoace_package_log]
- lingoace_package_ad_analysis 0.0.1 [flutter appsflyer_sdk]
- lingoace_package_analytics 0.0.5 [flutter firebase_analytics amplitude_flutter flutter_plugin_track]
- lingoace_package_cached_network_image 0.0.1 [flutter octo_image lingoace_package_cache_manager]
- lingoace_package_cartoon 0.0.1 [flutter uuid dio permission_handler webview_flutter lingoace_package_log]
- lingoace_package_log 0.0.1 [flutter lingoace_plugin_logan]
- lingoace_package_net 0.0.1 [flutter dio bot_toast device_info_plus package_info_plus quiver]
- lingoace_package_pdf 0.0.3 [flutter pdf printing lingoace_package_cache_manager flutter_pdfview flutter_pdf_printer numberpicker]
- lingoace_package_sp_cache 0.0.1 [flutter shared_preferences]
- lingoace_package_webview 0.0.1 [flutter webview_flutter lingoace_package_log connectivity]
- linked_scroll_controller 0.2.0 [flutter]
- lpinyin 2.0.3
- markdown 5.0.0 [args charcode meta]
- month_picker_dialog 0.4.0 [flutter flutter_localizations intl rxdart]
- network_to_file_image 3.1.0 [flutter]
- notification_permissions 0.6.1 [flutter]
- orientation 1.3.0 [flutter]
- package_info 2.0.2 [flutter]
- path 1.8.1
- path_provider 2.0.11 [flutter path_provider_android path_provider_ios path_provider_linux path_provider_macos path_provider_platform_interface path_provider_windows]
- permission_handler 9.2.0 [flutter meta permission_handler_android permission_handler_apple permission_handler_windows permission_handler_platform_interface]
- provider 5.0.0 [collection flutter nested]
- qr_flutter 4.0.0 [flutter qr]
- rich_text_widget 0.2.7 [flutter]
- sprintf 6.0.0
- stripe_payment 1.1.3 [flutter]
- underline_indicator 0.0.4 [flutter]
- upload_manager 0.0.1 [flutter dio event_bus]
- url_launcher 6.1.5 [flutter url_launcher_android url_launcher_ios url_launcher_linux url_launcher_macos url_launcher_platform_interface url_launcher_web url_launcher_windows]
- video_compress 3.1.1 [flutter]
- visibility_detector 0.2.2 [flutter]
dev dependencies:
- build_runner 2.2.0 [args async analyzer build build_config build_daemon build_resolvers build_runner_core code_builder collection crypto dart_style frontend_server_client glob graphs http_multi_server io js logging meta mime package_config path pool pub_semver pubspec_parse shelf shelf_web_socket stack_trace stream_transform timing watcher web_socket_channel yaml]
- flutter_section_table_view 1.0.4 [flutter]
- flutter_test 0.0.0 [flutter test_api path fake_async clock stack_trace vector_math async boolean_selector characters charcode collection matcher material_color_utilities meta source_span stream_channel string_scanner term_glyph]
- json_serializable 6.3.1 [analyzer async build build_config collection json_annotation meta path pub_semver pubspec_parse source_gen source_helper]
transitive dependencies:
- _fe_analyzer_shared 43.0.0 [meta]
- amplitude_flutter 3.10.0 [flutter flutter_web_plugins js]
- analyzer 4.3.1 [_fe_analyzer_shared collection convert crypto glob meta package_config path pub_semver source_span watcher yaml]
- appsflyer_sdk 6.5.2+2 [flutter]
- archive 3.3.1 [crypto path]
- args 2.3.1
- barcode 2.1.0 [meta qr]
- boolean_selector 2.1.0 [source_span string_scanner]
- build 2.3.0 [analyzer async convert crypto glob logging meta path]
- build_config 1.1.0 [checked_yaml json_annotation path pubspec_parse yaml]
- build_daemon 3.1.0 [built_collection built_value http_multi_server logging path pool shelf shelf_web_socket stream_transform watcher web_socket_channel]
- build_resolvers 2.0.9 [analyzer async build crypto graphs logging path package_config pool pub_semver stream_transform yaml]
- build_runner_core 7.2.3 [async build build_config build_resolvers collection convert crypto glob graphs json_annotation logging meta path package_config pool timing watcher yaml]
- built_collection 5.1.1
- built_value 8.4.0 [built_collection collection fixnum meta]
- charcode 1.3.1
- checked_yaml 2.0.1 [json_annotation source_span yaml]
- clock 1.1.0
- code_builder 4.2.0 [built_collection built_value collection matcher meta]
- collection 1.16.0
- connectivity 3.0.6 [flutter meta connectivity_platform_interface connectivity_macos connectivity_for_web]
- connectivity_macos 0.2.1+2 [flutter connectivity_platform_interface]
- connectivity_platform_interface 2.0.1 [flutter meta plugin_platform_interface]
- convert 3.0.2 [typed_data]
- csslib 0.17.2 [source_span]
- dart_style 2.2.3 [analyzer args path pub_semver source_span]
- device_info_platform_interface 2.0.1 [flutter meta plugin_platform_interface]
- device_info_plus 3.2.4 [flutter device_info_plus_platform_interface device_info_plus_macos device_info_plus_linux device_info_plus_web device_info_plus_windows]
- device_info_plus_linux 2.1.1 [device_info_plus_platform_interface file flutter meta]
- device_info_plus_macos 2.2.3 [device_info_plus_platform_interface flutter]
- device_info_plus_platform_interface 2.3.0+1 [flutter meta plugin_platform_interface]
- device_info_plus_web 2.1.0 [device_info_plus_platform_interface flutter_web_plugins flutter]
- device_info_plus_windows 2.1.1 [device_info_plus_platform_interface ffi flutter win32]
- dio 4.0.6 [http_parser path]
- dio_http2_adapter 2.0.0 [http2 dio]
- fake_async 1.3.0 [clock collection]
- ffi 1.2.1
- file 6.1.2 [meta path]
- firebase 9.0.3 [http http_parser js]
- firebase_analytics 9.3.0 [firebase_analytics_platform_interface firebase_analytics_web firebase_core firebase_core_platform_interface flutter]
- firebase_analytics_platform_interface 3.3.0 [firebase_core flutter meta plugin_platform_interface]
- firebase_analytics_web 0.4.2 [firebase_analytics_platform_interface firebase_core firebase_core_web flutter flutter_web_plugins js]
- firebase_core_platform_interface 4.5.0 [collection flutter flutter_test meta plugin_platform_interface]
- firebase_core_web 1.7.1 [firebase_core_platform_interface flutter flutter_web_plugins js meta]
- firebase_crashlytics_platform_interface 3.2.12 [collection firebase_core flutter meta plugin_platform_interface]
- firebase_messaging_platform_interface 3.5.4 [firebase_core flutter meta plugin_platform_interface]
- firebase_messaging_web 2.4.4 [firebase_core firebase_core_web firebase_messaging_platform_interface flutter flutter_web_plugins js meta]
- firebase_performance_platform_interface 0.1.1+12 [firebase_core flutter plugin_platform_interface]
- firebase_performance_web 0.1.1+1 [firebase firebase_core firebase_core_web firebase_performance_platform_interface flutter flutter_web_plugins js]
- firebase_remote_config_platform_interface 1.1.12 [firebase_core flutter meta plugin_platform_interface]
- firebase_remote_config_web 1.1.1 [firebase_core firebase_core_web firebase_remote_config_platform_interface flutter flutter_web_plugins js]
- fixnum 1.0.1
- flutter_blurhash 0.7.0 [flutter]
- flutter_cache_manager 3.3.0 [clock collection file flutter http path path_provider pedantic rxdart sqflite uuid]
- flutter_pdf_printer 1.0.0+2 [flutter]
- flutter_pdfview 1.2.3 [flutter]
- flutter_plugin_android_lifecycle 2.0.7 [flutter]
- flutter_plugin_track 0.0.1 [flutter device_info shared_preferences la_net la_evereport]
- flutter_screen_wake 1.0.2 [flutter]
- flutter_web_plugins 0.0.0 [flutter js characters collection material_color_utilities meta vector_math]
- frontend_server_client 2.1.3 [async path]
- fwfh_text_style 2.22.08 [flutter]
- glob 2.1.0 [async collection file path string_scanner]
- graphs 2.1.0 [collection]
- http 0.13.5 [async http_parser meta path]
- http2 2.0.0
- http_multi_server 3.2.1 [async]
- http_parser 4.0.1 [collection source_span string_scanner typed_data]
- image 3.1.3 [archive meta xml]
- infinite_listview 1.1.0 [flutter]
- io 1.0.3 [meta path string_scanner]
- js 0.6.4
- la_evereport 0.0.1 [flutter flutter_cupertino_localizations path_provider shared_preferences]
- la_net 0.0.2 [flutter dio dio_http2_adapter]
- lingoace_package_cache_manager 0.0.1 [flutter flutter_cache_manager file]
- lingoace_plugin_logan 1.0.2 [flutter]
- logging 1.0.2
- matcher 0.12.11 [stack_trace]
- material_color_utilities 0.1.4
- meta 1.7.0
- mime 1.0.2
- nested 1.0.0 [flutter]
- numberpicker 2.1.1 [flutter infinite_listview]
- octo_image 1.0.2 [flutter flutter_blurhash]
- package_config 2.1.0 [path]
- package_info_plus 1.4.2 [flutter package_info_plus_platform_interface package_info_plus_linux package_info_plus_macos package_info_plus_windows package_info_plus_web]
- package_info_plus_linux 1.0.5 [package_info_plus_platform_interface flutter path]
- package_info_plus_macos 1.3.0 [flutter]
- package_info_plus_platform_interface 1.0.2 [flutter meta plugin_platform_interface]
- package_info_plus_web 1.0.5 [flutter flutter_web_plugins http meta package_info_plus_platform_interface]
- package_info_plus_windows 1.0.5 [package_info_plus_platform_interface ffi flutter win32]
- path_parsing 0.2.1 [vector_math meta]
- path_provider_android 2.0.17 [flutter path_provider_platform_interface]
- path_provider_ios 2.0.11 [flutter path_provider_platform_interface]
- path_provider_linux 2.1.7 [ffi flutter path path_provider_platform_interface xdg_directories]
- path_provider_macos 2.0.6 [flutter path_provider_platform_interface]
- path_provider_platform_interface 2.0.4 [flutter platform plugin_platform_interface]
- path_provider_windows 2.0.7 [ffi flutter path path_provider_platform_interface win32]
- pdf 3.6.4 [archive barcode crypto image meta path_parsing vector_math xml]
- pedantic 1.11.1
- permission_handler_android 9.0.2+1 [flutter permission_handler_platform_interface]
- permission_handler_apple 9.0.4 [flutter permission_handler_platform_interface]
- permission_handler_platform_interface 3.7.0 [flutter meta plugin_platform_interface]
- permission_handler_windows 0.1.0 [flutter permission_handler_platform_interface]
- petitparser 5.0.0 [meta]
- platform 3.1.0
- plugin_platform_interface 2.1.2 [meta]
- pool 1.5.1 [async stack_trace]
- printing 5.6.5 [ffi flutter flutter_web_plugins http image js meta pdf plugin_platform_interface]
- process 4.2.4 [file path platform]
- pub_semver 2.1.1 [collection meta]
- pubspec_parse 1.2.0 [checked_yaml collection json_annotation pub_semver yaml]
- qr 2.1.0 [meta]
- quiver 3.1.0 [matcher]
- rxdart 0.26.0
- scrollable_positioned_list 0.2.3 [flutter collection]
- shared_preferences 2.0.7 [flutter meta shared_preferences_linux shared_preferences_macos shared_preferences_platform_interface shared_preferences_web shared_preferences_windows]
- shared_preferences_linux 2.1.1 [file flutter path path_provider_linux path_provider_platform_interface shared_preferences_platform_interface]
- shared_preferences_macos 2.0.4 [flutter shared_preferences_platform_interface]
- shared_preferences_platform_interface 2.0.0 [flutter]
- shared_preferences_web 2.0.4 [flutter flutter_web_plugins shared_preferences_platform_interface]
- shared_preferences_windows 2.1.1 [file flutter path path_provider_platform_interface path_provider_windows shared_preferences_platform_interface]
- shelf 1.3.2 [async collection http_parser path stack_trace stream_channel]
- shelf_web_socket 1.0.2 [shelf stream_channel web_socket_channel]
- sky_engine 0.0.99
- source_gen 1.2.2 [analyzer async build dart_style glob meta path source_span yaml]
- source_helper 1.3.2 [analyzer collection source_gen]
- source_span 1.8.2 [collection path term_glyph]
- sqflite 2.0.3 [flutter sqflite_common path]
- sqflite_common 2.2.1+1 [synchronized path meta]
- stack_trace 1.10.0 [path]
- stream_channel 2.1.0 [async]
- stream_transform 2.0.0
- string_scanner 1.1.0 [charcode source_span]
- synchronized 3.0.0+2
- term_glyph 1.2.0
- test_api 0.4.9 [async boolean_selector collection meta source_span stack_trace stream_channel string_scanner term_glyph matcher]
- timing 1.0.0 [json_annotation]
- typed_data 1.3.1 [collection]
- url_launcher_android 6.0.17 [flutter url_launcher_platform_interface]
- url_launcher_ios 6.0.17 [flutter url_launcher_platform_interface]
- url_launcher_linux 3.0.1 [flutter url_launcher_platform_interface]
- url_launcher_macos 3.0.1 [flutter url_launcher_platform_interface]
- url_launcher_platform_interface 2.1.0 [flutter plugin_platform_interface]
- url_launcher_web 2.0.12 [flutter flutter_web_plugins url_launcher_platform_interface]
- url_launcher_windows 3.0.1 [flutter url_launcher_platform_interface]
- uuid 3.0.6 [crypto]
- vector_math 2.1.2
- video_player 2.4.5 [flutter html video_player_android video_player_avfoundation video_player_platform_interface video_player_web]
- video_player_android 2.3.8 [flutter video_player_platform_interface]
- video_player_avfoundation 2.3.5 [flutter video_player_platform_interface]
- video_player_platform_interface 5.1.3 [flutter plugin_platform_interface]
- video_player_web 2.0.12 [flutter flutter_web_plugins video_player_platform_interface]
- wakelock 0.5.6 [flutter meta wakelock_macos wakelock_platform_interface wakelock_web wakelock_windows]
- wakelock_macos 0.4.0 [flutter flutter_web_plugins wakelock_platform_interface]
- wakelock_platform_interface 0.3.0 [flutter meta]
- wakelock_web 0.4.0 [flutter flutter_web_plugins js wakelock_platform_interface]
- wakelock_windows 0.2.0 [flutter wakelock_platform_interface win32]
- watcher 1.0.1 [async path]
- web_socket_channel 2.2.0 [async crypto stream_channel]
- webview_flutter 2.0.13 [flutter]
- win32 2.6.1 [ffi]
- xdg_directories 0.2.0+1 [meta path process]
- xml 5.4.1 [collection meta petitparser]
- yaml 3.1.1 [collection source_span string_scanner]
          
@chejdj

Is this crash replicable locally in debug mode ? If so, can you provide steps to replicate and possibly minimal code sample ?
Also, can you try to upgrade firebase_messaging plugin and shared_preferences plugin to latest versions and try again to see if you still get same crash ?
https://pub.dev/packages/firebase_messaging/changelog#1201
https://pub.dev/packages/shared_preferences/changelog#2015
  blocked: customer-response
  Waiting for customer response, e.g. more information was requested.
    and removed
  Needs Attention
  This issue needs maintainer attention.
  labels
    Aug 9, 2022
  resolution: needs-repro
  This issue could not be reproduced or needs an up to date reproduction on latest FlutterFire plugin.
    and removed
  blocked: customer-response
  Waiting for customer response, e.g. more information was requested.
  in triage
  labels
    Aug 10, 2022
    resolution: needs-repro
  This issue could not be reproduced or needs an up to date reproduction on latest FlutterFire plugin.
    type: bug
  Something isn't working