Wsrtjtyk

My goal is to listen to the user activites and on change do something in the background like log the event in a database. When the app is in the foreground the events are fired correctly. When the app is closed (but my service is running) then no event is fired. How could I get these events?

General Background Service:

public class AppService extends Service {



    ActivitySensor activitySensor;



    @Override

    public void onCreate() {

        super.onCreate();

    }



    public int onStartCommand(Intent intent, int flags, int startId) {

       activitySensor = new ActivitySensor(getApplicationContext());

       activitySensor.start();

        return START_STICKY;

    }



@Override

    public void onDestroy() {

        Log.d("Service", "onDestroy");

        activitySensor.stop();

        super.onDestroy();

    }

ActivitySensor:

public class ActivitySensor {



    private static final long DETECTION_INTERVAL_IN_MILLISECONDS = 3000;



    private  ActivityRecognitionClient mActivityRecognitionClient;

    private Intent mIntentService;

    private PendingIntent mPendingIntent;

    private Context context;



    public ActivitySensor(Context _context){

        this.context = _context;

        mIntentService = new Intent(context, DetectedActivitiesIntentService.class);

        mPendingIntent = PendingIntent.getService(context, 1, mIntentService, PendingIntent.FLAG_UPDATE_CURRENT);

        mActivityRecognitionClient = new ActivityRecognitionClient(context);



    }

    public void start(){

        Task<Void> task = mActivityRecognitionClient.requestActivityUpdates(

                DETECTION_INTERVAL_IN_MILLISECONDS,

                mPendingIntent);



        task.addOnSuccessListener(new OnSuccessListener<Void>() {

            @Override

            public void onSuccess(Void result) {

                Toast.makeText(context,

                        "Successfully requested activity updates",

                        Toast.LENGTH_SHORT)

                        .show();

            }

        });



        task.addOnFailureListener(new OnFailureListener() {

            @Override

            public void onFailure(@NonNull Exception e) {

                Toast.makeText(context,

                        "Requesting activity updates failed to start",

                        Toast.LENGTH_SHORT)

                        .show();

            }

        });

    }



     public void stop() {

        Task<Void> task = mActivityRecognitionClient.removeActivityUpdates(

                mPendingIntent);

        task.addOnSuccessListener(new OnSuccessListener<Void>() {

            @Override

            public void onSuccess(Void result) {

                Toast.makeText(context,

                        "Removed activity updates successfully!",

                        Toast.LENGTH_SHORT)

                        .show();

            }

        });



        task.addOnFailureListener(new OnFailureListener() {

            @Override

            public void onFailure(@NonNull Exception e) {

                Toast.makeText(context, "Failed to remove activity updates!",

                        Toast.LENGTH_SHORT).show();

            }

        });

    }

}

DetectedActivitiesIntentService:

public class DetectedActivitiesIntentService  extends IntentService {



    protected static final String TAG = DetectedActivitiesIntentService.class.getSimpleName();



    String valueNames = {"activity", "confidence"} ;

    AppDatabase db;



    public DetectedActivitiesIntentService() {

        // Use the TAG to name the worker thread.

        super(TAG);

    }



    @Override

    public void onCreate() {

        super.onCreate();

        this.db = ((BaseApp)getApplication()).getDatabase();

    }



    @Override

    protected void onHandleIntent(Intent intent) {

        //never fired

        Handler handler = new Handler(Looper.getMainLooper());

        handler.post(new Runnable() {



                @Override

                public void run() {

                    Toast.makeText(DetectedActivitiesIntentService.this.getApplicationContext(), "Activity detected: "+ actS + " "+ values[1], Toast.LENGTH_SHORT).show();

                }





        });

    }

    }

standard background services are no longer supported in Android Oreo, due to background execution limitations. you can read more about it here: android docs

I recommend having a look at JobintentService that can be used instead of a standard service and, it might be suitable for you to use an explicit broadcast receiver to invoke that JobIntentService.