Flutter_cached_network_image: Unhandled Exception: MissingPluginException when app is in background

[jinfagang]

Unhandled Exception: MissingPluginException(No implementation found for method getDatabasesPath on channel com.tekartik.sqflite)

[kaparray]

+

[kaparray]

Quite application and start again.
a database must be created for caching.

[renefloor]

I don't understand what is happening here. The MissingPluginException should not occur although there is no database yet. What platform is this? (Android or iOS) Can you reproduce this easily?

[mcxinyu]

1、flutter use flutter_cached_network_image
2、flutter add-to-app
3、build aar then build app

https://github.com/tekartik/sqflite/issues/368

[renefloor]

Ah looks like an issue with the sqflite plugin when embedding. If I have time I can have a look at that plugin, but I don't make a promise.

[xufangzhen]

MissingPluginException(No implementation found for method getDatabasesPath on channel com.tekartik.sqflite)
[log]

0 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:319:7)

1 invokeMethod (package:sqflite/src/sqflite_impl.dart:20:13)

[alextekartik]

This should be fixed in sqflite (1.2.2 just published ok)

[mcxinyu]

This should be fixed in sqflite (1.2.2 just published ok)

unsolved for embedding

[alextekartik]

@mcxinyu How can I reproduce the issue? Do you have simple project showing the issue ? I'm not sure what you mean by unsolved for embedding. Are you following the guide here: https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects

[mcxinyu]

I can provide sample projects later

[mcxinyu]

Maybe it's a problem with my code. I didn't reproduce it when I wrote the sample. Thanks

[sjoe]

same here (version ^2.3.0-beta):
2020-05-25 11:47:46.057 4563-4893/ch.XXX.dev E/flutter: [ERROR:flutter/lib/ui/ui_dart_state.cc(166)] Unhandled Exception: MissingPluginException(No implementation found for method getDatabasesPath on channel com.tekartik.sqflite) #0 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:154:7) <asynchronous suspension> #1 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:329:12) #2 invokeMethod (package:sqflite/src/sqflite_impl.dart:17:13) #3 SqfliteDatabaseFactoryImpl.invokeMethod (package:sqflite/src/factory_impl.dart:31:7) #4 SqfliteDatabaseFactoryMixin.safeInvokeMethod.<anonymous closure> (package:sqflite_common/src/factory_mixin.dart:25:35) #5 wrapDatabaseException (package:sqflite/src/exception_impl.dart:7:32) #6 SqfliteDatabaseFactoryImpl.wrapDatabaseException (package:sqflite/src/factory_impl.dart:27:7) #7 SqfliteDatabaseFactoryMixin.safeInvokeMethod (package:sqflite_common/src/factory_mixin.dart:25:7) #8 SqfliteDatabaseFactoryMixin.getDatabasesPath (package:sqflite_common/src/factory_mixin.dart:143:26) #9 getDatabasesPath (package:sqflite/sqflite.dart:168:54) #10 CacheStore._getObjectProvider (package:flutter_cache_manager/src/cache_store.dart:43:33) #11 new CacheStore (package:flutter_cache_manager/src/cache_store.dart:39:49) #12 new BaseCacheManager (package:flutter_cache_manager/src/cache_manager.dart:83:9) #13 new DefaultCacheManager._ (package:flutter_cache_manager/src/cache_manager.dart:38:29) #14 new DefaultCacheManager (package:flutter_cache_manager/src/cache_manager.dart:34:39) #15 CachedNetworkImageState._cacheManager (package:cached_network_image/src/cached_image_widget.dart:404:35) #16 CachedNetworkImageState._createFileStream (package:cached_network_image/src/cached_image_widget.dart:242:19) #17 CachedNetworkImageState.initState (package:cached_network_image/src/cached_image_widget.dart:219:5) #18 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4644:58) #19 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4480:5) #20 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3450:14) #21 Element.updateChild (package:flutter/src/widgets/framework.dart:3218:18) #22 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4531:16) #23 Element.rebuild (package:flutter/src/widgets/framework.dart:4222:5) #24 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4485:5) #25 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4480:5) #26 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3450:14) #27 Element.updateChild (package:flutter/src/widgets/framework.dart:3218:18) #28 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4531:16) #29 Element.rebuild (package:flutter/src/widgets/framework.dart:4222:5) #30 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4485:5) #31 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4480:5) #32 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3450:14) #33 Element.updateChild (package:flutter/src/widgets/framework.dart:3218:18) #34 _ListTileElement._mountChild (package:flutter/src/material/list_tile.dart:1039:30) #35 _ListTileElement.mount (package:flutter/src/material/list_tile.dart:1053:5) #36 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3450:14) #37 Element.updateChild (package:flutter/src/widgets/framework.dart:3218:18) #38 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4531:16) #39 Element.rebuild (package:flutter/src/widgets/framework.dart:4222:5) #40 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4485:5) #41 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4480:5) #42 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3450:14) #43 Element.update

[renefloor]

@sjoe do you have a reproducable example? I cannot fix much with just this stacktrace.

[sjoe]

I found the solution!
After adding the plugin I had to rebuild the Android code.
The hot reload did not work correctly.

[renefloor]

I guess the MissingPluginException is in general a case of a proper rebuild of the app, so I'll close this issue.

[SureShDood]

Its happening while app is in background (not terminated), access to the database error has thrown.

[renefloor]

@SureShDood that is useful information. Is this on Android or iOS?

[alextekartik]

If you need to use sqflite in a FCM messaging context, i think you need to register the plugin at the application level.

See a related issue here: https://github.com/tekartik/sqflite/issues/446

if the project was generated a long time ago, you might have to follow https://flutter.dev/docs/development/packages-and-plugins/plugin-api-migration

[SureShDood]

@renefloor Its occurred an android. @alextekartik Thanks. It's solved.

[renefloor]

Thanks for the quick response @alextekartik

[emouawad]

@renefloor Its occurred an android. @alextekartik Thanks. It's solved.

How did you solve it?
Trying to use it in background isolate (pub workmanager)
Flutter 1.20.4

[nerder]

We have a similar issue, but for some reason it happens only for the production build. This is happening since we have migrated to Android Embedded V2 https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects

[Worien]

The same issue for registering plugins in background for Android Embedded V2:
https://stackoverflow.com/questions/67582684/unhandled-exception-missingpluginexceptionno-implementation-found-for-method-s