ANDROID_SETUP.md

Check your AndroidManifest.xml

Check if you have the following in your AndroidManifest.xml file.

<meta-data
    android:name="flutterEmbedding"
    android:value="2" />

Ideally you should have this, if not follow the upgrade guide.
If for some reason you can't upgrade yet we still support the older way of embedding:

In your pubspec.yaml file, add:

dependencies:
  workmanager:
    git:
      url: https://github.com/fluttercommunity/flutter_workmanager.git
      path: workmanager
      ref: main

instead of

dependencies:
  workmanager: ^0.5.2

How to Debug my background job

Debugging a background task can be difficult, Android decides when is the best time to run.
There is no guaranteed way to enforce a run of a job even in debug mode.

However to facilitate debugging, the plugin provides an isInDebugMode flag when initializing the plugin: Workmanager().initialize(callbackDispatcher, isInDebugMode: true)

Once this flag is enabled you will receive a notification whenever a background task was triggered.
This way you can keep track whether that task ran successfully or not.