MissingPluginException(No implementation found for method ready on channel com.transistorsoft/flutter_background_ge

[vikramkapoor]

Your Environment

• Plugin version: flutter_background_geolocation: '^1.0.8'
• Platform: Android
• OS version: Android P (9.0)
• Device manufacturer / model: Android Virtual Device - Nexus 5X API 28 x86
• Flutter info (flutter doctor):
  Doctor summary (to see all details, run flutter doctor -v):
  [√] Flutter (Channel stable, v1.5.4-hotfix.2, on Microsoft Windows [Version 10.0.18362.113], locale en-US)

[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[√] Android Studio (version 3.4)
[√] VS Code (version 1.35.0)
[√] Connected device (1 available)
• No issues found!

• Plugin config:

PASTE_YOUR_CODE_HERE
      bg.BackgroundGeolocation.ready(bg.Config(
          desiredAccuracy: bg.Config.DESIRED_ACCURACY_HIGH,
          distanceFilter: 10.0,
          stopOnTerminate: false,
          startOnBoot: true,
          debug: true,
          logLevel: bg.Config.LOG_LEVEL_VERBOSE,
          reset: true))
          .then((bg.State state) {
        if (!state.enabled) {
          ////
          // 3.  Start the plugin.
          //
          bg.BackgroundGeolocation.start();
        }
      });

      // Manually fetch the current position.

      bg.BackgroundGeolocation.getCurrentPosition(
          persist: false, // <-- do not persist this location

          desiredAccuracy: 0, // <-- desire best possible accuracy

          timeout: 30000, // <-- wait 30s before giving up.

          samples: 3 // <-- sample 3 location before selecting best.

      )
          .then((bg.Location location) {
        //_location = location;
        print('[getCurrentPosition] - $location');
        print("Lat: ${location.coords.latitude} Long: ${location.coords
            .longitude}");

Expected Behavior

The call should return location like it does on iOS

Actual Behavior

Leads to MissingPluginException.

Steps to Reproduce

1. Run the code above from background isolate

Context

Above code works from UI isolate but I need to get location in background. I spawned an isolate and copied the code above to it. It worked on iOS but on Android I get Missing Plugin Exception on bg.BackgroundGeolocation.ready

Debug logs

Logs

PASTE_YOUR_LOGS_HERE
I/flutter ( 7121): Another exception was thrown: MissingPluginException(No implementation found for method listen on channel com.transistorsoft/flutter_background_geolocation/events/location)
I/flutter ( 7121): Another exception was thrown: MissingPluginException(No implementation found for method listen on channel com.transistorsoft/flutter_background_geolocation/events/motionchange)
I/flutter ( 7121): Another exception was thrown: MissingPluginException(No implementation found for method listen on channel com.transistorsoft/flutter_background_geolocation/events/providerchange)
I/flutter ( 7121): Another exception was thrown: MissingPluginException(No implementation found for method listen on channel plugins.pauldemarco.com/flutter_blue/state)
I/flutter ( 7121): [BackgroundGeolocation registerHeadlessTask] ‼️ MissingPluginException(No implementation found for method registerHeadlessTask on channel com.transistorsoft/flutter_background_geolocation/methods)
Error -32601 received from application: Method not found
</details>

[christocracy]

The issue template is not optional..

You have neglected crucial info. Particularly Plugin version. Edit you issue and provide the Required info.

[vikramkapoor]

I found the issue. There was an error during plugin registration for the background Isolate. The problem went away after fixing that.

[christocracy]

In the future, never ignore the issue template.

[stijnie2210]

@vikramkapoor Any chance you can tell me how you solved this?