More WIP, but we're getting closer

current state:
- storing samples works (tested only mi band)
- charts work

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/GBApplication.java

@@ -57,10 +57,10 @@ public class GBApplication extends Application {
     //if preferences have to be migrated, increment the following and add the migration logic in migratePrefs below; see http://stackoverflow.com/questions/16397848/how-can-i-migrate-android-preferences-with-a-new-version
     private static final int CURRENT_PREFS_VERSION = 2;
     private static LimitedQueue mIDSenderLookup = new LimitedQueue(16);
-    private static DaoSession daoSession;
     private static Appender<ILoggingEvent> fileLogger;
     private static Prefs prefs;
     private static GBPrefs gbPrefs;
+    private static DBHandler lockHandler;
 
     public static final String ACTION_QUIT
             = "nodomain.freeyourgadget.gadgetbridge.gbapplication.action.quit";
@@ -206,11 +206,7 @@ public class GBApplication extends Application {
         DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(this, "test-db", null);
         SQLiteDatabase db = helper.getWritableDatabase();
         DaoMaster daoMaster = new DaoMaster(db);
-        daoSession = daoMaster.newSession();
+        lockHandler = new LockHandler(daoMaster.newSession());
-    }
-
-    public static DaoSession getDaoSession() {
-        return daoSession;
     }
 
     public static Context getContext() {
@@ -238,10 +234,10 @@ public class GBApplication extends Application {
      * @see #releaseDB()
      */
     public static DBHandler acquireDB() throws GBException {
-        // TODO: implement locking with greendao?
         try {
             if (dbLock.tryLock(30, TimeUnit.SECONDS)) {
-                return mActivityDatabaseHandler;
+                return lockHandler;
+//                return mActivityDatabaseHandler;
             }
         } catch (InterruptedException ex) {
             Log.i(TAG, "Interrupted while waiting for DB lock");

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/LockHandler.java

@@ -1,12 +1,15 @@
-package nodomain.freeyourgadget.gadgetbridge.database;
+package nodomain.freeyourgadget.gadgetbridge;
 
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
 
 import java.util.List;
 
+import nodomain.freeyourgadget.gadgetbridge.GBApplication;
+import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
 import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.entities.AbstractActivitySample;
+import nodomain.freeyourgadget.gadgetbridge.entities.DaoSession;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
 
 /**
@@ -15,13 +18,19 @@ import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
  */
 public class LockHandler implements DBHandler {
 
-    @Override
+    private final DaoSession session;
-    public void release() {
 
+    public LockHandler(DaoSession daoSession) {
+        session = daoSession;
     }
 
     @Override
     public void close() {
+        GBApplication.releaseDB();
+    }
+
+    @Override
+    public void closeDb() {
 
     }
 
@@ -32,22 +41,31 @@ public class LockHandler implements DBHandler {
 
     @Override
     public List<ActivitySample> getAllActivitySamples(int tsFrom, int tsTo, SampleProvider provider) {
-        return null;
+        return provider.getAllActivitySamples(tsFrom, tsTo);
     }
 
     @Override
     public List<ActivitySample> getActivitySamples(int tsFrom, int tsTo, SampleProvider provider) {
-        return null;
+        return provider.getActivitySamples(tsFrom, tsTo);
     }
 
     @Override
     public List<ActivitySample> getSleepSamples(int tsFrom, int tsTo, SampleProvider provider) {
-        return null;
+        return provider.getSleepSamples(tsFrom, tsTo);
+    }
+
+    @Override
+    public int fetchLatestTimestamp(SampleProvider provider) {
+        return provider.fetchLatestTimestamp();
+    }
+
+    @Override
+    public DaoSession getDaoSession() {
+        return session;
     }
 
     @Override
     public void addGBActivitySample(AbstractActivitySample sample) {
-
     }
 
     @Override
@@ -69,9 +87,4 @@ public class LockHandler implements DBHandler {
     public void changeStoredSamplesType(int timestampFrom, int timestampTo, int fromKind, int toKind, SampleProvider provider) {
 
     }
-
-    @Override
-    public int fetchLatestTimestamp(SampleProvider provider) {
-        return 0;
-    }
 }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/DebugActivity.java

@@ -237,19 +237,13 @@ public class DebugActivity extends GBActivity {
     }
 
     private void exportDB() {
-        DBHandler dbHandler = null;
+        try (DBHandler dbHandler = GBApplication.acquireDB()) {
-        try {
-            dbHandler = GBApplication.acquireDB();
             DBHelper helper = new DBHelper(this);
             File dir = FileUtils.getExternalFilesDir();
             File destFile = helper.exportDB(dbHandler.getHelper(), dir);
             GB.toast(this, "Exported to: " + destFile.getAbsolutePath(), Toast.LENGTH_LONG, GB.INFO);
         } catch (Exception ex) {
             GB.toast(this, "Error exporting DB: " + ex.getMessage(), Toast.LENGTH_LONG, GB.ERROR, ex);
-        } finally {
-            if (dbHandler != null) {
-                dbHandler.release();
-            }
         }
     }
 
@@ -261,9 +255,7 @@ public class DebugActivity extends GBActivity {
                 .setPositiveButton("Overwrite", new DialogInterface.OnClickListener() {
                     @Override
                     public void onClick(DialogInterface dialog, int which) {
-                        DBHandler dbHandler = null;
+                        try (DBHandler dbHandler = GBApplication.acquireDB()) {
-                        try {
-                            dbHandler = GBApplication.acquireDB();
                             DBHelper helper = new DBHelper(DebugActivity.this);
                             File dir = FileUtils.getExternalFilesDir();
                             SQLiteOpenHelper sqLiteOpenHelper = dbHandler.getHelper();
@@ -273,10 +265,6 @@ public class DebugActivity extends GBActivity {
                             GB.toast(DebugActivity.this, "Import successful.", Toast.LENGTH_LONG, GB.INFO);
                         } catch (Exception ex) {
                             GB.toast(DebugActivity.this, "Error importing DB: " + ex.getMessage(), Toast.LENGTH_LONG, GB.ERROR, ex);
-                        } finally {
-                            if (dbHandler != null) {
-                                dbHandler.release();
-                            }
                         }
                     }
                 })

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/GBActivity.java

@@ -20,8 +20,4 @@ public class GBActivity extends AppCompatActivity {
 
         super.onCreate(savedInstanceState);
     }
-
-    protected DaoSession getDAOSession() {
-        return GBApplication.getDaoSession();
-    }
 }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java

@@ -293,9 +293,9 @@ public abstract class AbstractChartFragment extends AbstractGBFragment {
         return akActivity.color;
     }
 
-    protected SampleProvider getProvider(GBDevice device) {
+    protected SampleProvider getProvider(DBHandler db, GBDevice device) {
         DeviceCoordinator coordinator = DeviceHelper.getInstance().getCoordinator(device);
-        return coordinator.getSampleProvider();
+        return coordinator.getSampleProvider(db);
     }
 
     /**
@@ -307,7 +307,7 @@ public abstract class AbstractChartFragment extends AbstractGBFragment {
      * @param tsTo
      */
     protected List<ActivitySample> getAllSamples(DBHandler db, GBDevice device, int tsFrom, int tsTo) {
-        SampleProvider provider = getProvider(device);
+        SampleProvider provider = getProvider(db, device);
         return db.getAllActivitySamples(tsFrom, tsTo, provider);
     }
 
@@ -316,13 +316,13 @@ public abstract class AbstractChartFragment extends AbstractGBFragment {
     }
 
     protected List<ActivitySample> getActivitySamples(DBHandler db, GBDevice device, int tsFrom, int tsTo) {
-        SampleProvider provider = getProvider(device);
+        SampleProvider provider = getProvider(db, device);
         return db.getActivitySamples(tsFrom, tsTo, provider);
     }
 
 
     protected List<ActivitySample> getSleepSamples(DBHandler db, GBDevice device, int tsFrom, int tsTo) {
-        SampleProvider provider = getProvider(device);
+        SampleProvider provider = getProvider(db, device);
         return db.getSleepSamples(tsFrom, tsTo, provider);
     }
 
@@ -334,7 +334,7 @@ public abstract class AbstractChartFragment extends AbstractGBFragment {
         tsTo = (int) ((cal.getTimeInMillis() / 1000));
         tsFrom = tsTo - (24 * 60 * 60);
 
-        SampleProvider provider = getProvider(device);
+        SampleProvider provider = getProvider(db, device);
         return db.getAllActivitySamples(tsFrom, tsTo, provider);
     }
 

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/ActivityDatabaseHandler.java

@@ -18,6 +18,7 @@ import nodomain.freeyourgadget.gadgetbridge.database.schema.ActivityDBCreationSc
 import nodomain.freeyourgadget.gadgetbridge.database.schema.SchemaMigration;
 import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.entities.AbstractActivitySample;
+import nodomain.freeyourgadget.gadgetbridge.entities.DaoSession;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivityKind;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
@@ -155,13 +156,13 @@ public class ActivityDatabaseHandler extends SQLiteOpenHelper implements DBHandl
     }
 
     @Override
-    public SQLiteOpenHelper getHelper() {
+    public void closeDb() {
-        return this;
+        GBApplication.releaseDB();
     }
 
     @Override
-    public void release() {
+    public SQLiteOpenHelper getHelper() {
-        GBApplication.releaseDB();
+        return this;
     }
 
     public ArrayList<ActivitySample> getAllActivitySamples(int timestamp_from, int timestamp_to, SampleProvider provider) {
@@ -275,4 +276,9 @@ public class ActivityDatabaseHandler extends SQLiteOpenHelper implements DBHandl
         }
         return -1;
     }
+
+    @Override
+    public DaoSession getDaoSession() {
+        return null;
+    }
 }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/DBAccess.java

@@ -26,16 +26,10 @@ public abstract class DBAccess extends AsyncTask {
 
     @Override
     protected Object doInBackground(Object[] params) {
-        DBHandler handler = null;
+        try (DBHandler db = GBApplication.acquireDB()) {
-        try {
+            doInBackground(db);
-            handler = GBApplication.acquireDB();
-            doInBackground(handler);
         } catch (Exception e) {
             mError = e;
-        } finally {
-            if (handler != null) {
-                handler.release();
-            }
         }
         return null;
     }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/DBHandler.java

@@ -8,13 +8,14 @@ import java.util.List;
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.entities.AbstractActivitySample;
+import nodomain.freeyourgadget.gadgetbridge.entities.DaoSession;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
 
-public interface DBHandler {
+public interface DBHandler extends AutoCloseable {
     /**
      * Closes the database.
      */
-    void close();
+    void closeDb();
 
     SQLiteOpenHelper getHelper();
 
@@ -22,7 +23,7 @@ public interface DBHandler {
      * Releases the DB handler. No access may be performed after calling this method.
      * Same as calling {@link GBApplication#releaseDB()}
      */
-    void release();
+    void close() throws Exception;
 
     List<ActivitySample> getAllActivitySamples(int tsFrom, int tsTo, SampleProvider provider);
 
@@ -42,4 +43,5 @@ public interface DBHandler {
 
     int fetchLatestTimestamp(SampleProvider provider);
 
+    DaoSession getDaoSession();
 }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/DBHelper.java

@@ -116,8 +116,7 @@ public class DBHelper {
         return "";
     }
 
-    public static User getUser() {
+    public static User getUser(DaoSession session) {
-        DaoSession session = GBApplication.getDaoSession();
         UserDao userDao = session.getUserDao();
         List<User> users = userDao.loadAll();
         if (users.isEmpty()) {
@@ -148,8 +147,7 @@ public class DBHelper {
         return user;
     }
 
-    public static Device getDevice(GBDevice gbDevice) {
+    public static Device getDevice(GBDevice gbDevice, DaoSession session) {
-        DaoSession session = GBApplication.getDaoSession();
         DeviceDao deviceDao = session.getDeviceDao();
         Query<Device> query = deviceDao.queryBuilder().where(DeviceDao.Properties.Identifier.eq(gbDevice.getAddress())).build();
         List<Device> devices = query.list();

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/AbstractSampleProvider.java

@@ -16,7 +16,7 @@ import nodomain.freeyourgadget.gadgetbridge.entities.MiBandActivitySampleDao;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivityKind;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
 
-public abstract class AbstractSampleProvider<T extends ActivitySample> implements SampleProvider, DBHandler {
+public abstract class AbstractSampleProvider<T extends ActivitySample> implements SampleProvider {
     private static final WhereCondition[] NO_CONDITIONS = new WhereCondition[0];
     private final DaoSession mSession;
 
@@ -28,47 +28,31 @@ public abstract class AbstractSampleProvider<T extends ActivitySample> implement
         return mSession;
     }
 
+    @Override
     public List<T> getAllActivitySamples(int timestamp_from, int timestamp_to) {
         return getGBActivitySamples(timestamp_from, timestamp_to, ActivityKind.TYPE_ALL);
     }
 
+    @Override
     public List<T> getActivitySamples(int timestamp_from, int timestamp_to) {
         return getGBActivitySamples(timestamp_from, timestamp_to, ActivityKind.TYPE_ACTIVITY);
     }
 
+    @Override
     public List<T> getSleepSamples(int timestamp_from, int timestamp_to) {
         return getGBActivitySamples(timestamp_from, timestamp_to, ActivityKind.TYPE_SLEEP);
     }
 
     @Override
-    public void close() {
+    public int fetchLatestTimestamp() {
-        // TESTING: NOOP
+        QueryBuilder<T> qb = getSampleDao().queryBuilder();
+        qb.orderDesc(MiBandActivitySampleDao.Properties.Timestamp);
+        qb.limit(1);
+        List<T> list = qb.build().list();
+        if (list.size() >= 1) {
+            return list.get(0).getTimestamp();
         }
-
+        return -1;
-    @Override
-    public SQLiteOpenHelper getHelper() {
-        // TESTING: NOOP
-        return null;
-    }
-
-    @Override
-    public void release() {
-        // TESTING: NOOP
-    }
-
-    @Override
-    public List<ActivitySample> getAllActivitySamples(int tsFrom, int tsTo, SampleProvider provider) {
-        return (List<ActivitySample>) getGBActivitySamples(tsFrom, tsTo, ActivityKind.TYPE_ALL);
-    }
-
-    @Override
-    public List<ActivitySample> getActivitySamples(int tsFrom, int tsTo, SampleProvider provider) {
-        return (List<ActivitySample>) getGBActivitySamples(tsFrom, tsTo, ActivityKind.TYPE_ACTIVITY);
-    }
-
-    @Override
-    public List<ActivitySample> getSleepSamples(int tsFrom, int tsTo, SampleProvider provider) {
-        return (List<ActivitySample>) getGBActivitySamples(tsFrom, tsTo, ActivityKind.TYPE_SLEEP);
     }
 
     @Override
@@ -81,42 +65,77 @@ public abstract class AbstractSampleProvider<T extends ActivitySample> implement
         getSampleDao().insertInTx((T[]) activitySamples);
     }
 
-    @Override
+//    @Override
-    public SQLiteDatabase getWritableDatabase() {
+//    public void close() {
-        // TESTING: NOOP
+//        // TESTING: NOOP
-        return null;
+//    }
-    }
+//
-
+//    @Override
-    @Override
+//    public SQLiteOpenHelper getHelper() {
-    public void changeStoredSamplesType(int timestampFrom, int timestampTo, int kind, SampleProvider provider) {
+//        // TESTING: NOOP
-
+//        return null;
-    }
+//    }
-
+//
-    @Override
+//    @Override
-    public void changeStoredSamplesType(int timestampFrom, int timestampTo, int fromKind, int toKind, SampleProvider provider) {
+//    public void release() {
-
+//        // TESTING: NOOP
-    }
+//    }
-
+//
-    @Override
+//    @Override
-    public int fetchLatestTimestamp(SampleProvider provider) {
+//    public List<ActivitySample> getAllActivitySamples(int tsFrom, int tsTo, SampleProvider provider) {
-        return 0;
+//        return (List<ActivitySample>) getGBActivitySamples(tsFrom, tsTo, ActivityKind.TYPE_ALL);
-    }
+//    }
-
+//
-//    SQLiteDatabase getWritableDatabase();
+//    @Override
-
+//    public List<ActivitySample> getActivitySamples(int tsFrom, int tsTo, SampleProvider provider) {
-    public void changeStoredSamplesType(int timestampFrom, int timestampTo, int kind) {
+//        return (List<ActivitySample>) getGBActivitySamples(tsFrom, tsTo, ActivityKind.TYPE_ACTIVITY);
-        // TODO: implement
+//    }
-    }
+//
-
+//    @Override
-    public void changeStoredSamplesType(int timestampFrom, int timestampTo, int fromKind, int toKind) {
+//    public List<ActivitySample> getSleepSamples(int tsFrom, int tsTo, SampleProvider provider) {
-        // TODO: implement
+//        return (List<ActivitySample>) getGBActivitySamples(tsFrom, tsTo, ActivityKind.TYPE_SLEEP);
-    }
+//    }
+//
+//    @Override
+//    public SQLiteDatabase getWritableDatabase() {
+//        // TESTING: NOOP
+//        return null;
+//    }
+//
+//    @Override
+//    public void changeStoredSamplesType(int timestampFrom, int timestampTo, int kind, SampleProvider provider) {
+//
+//    }
+//
+//    @Override
+//    public void changeStoredSamplesType(int timestampFrom, int timestampTo, int fromKind, int toKind, SampleProvider provider) {
+//
+//    }
+//
+//    @Override
+//    public int fetchLatestTimestamp(SampleProvider provider) {
+//        return 0;
+//    }
+//
+////    SQLiteDatabase getWritableDatabase();
+//
+//    public void changeStoredSamplesType(int timestampFrom, int timestampTo, int kind) {
+//        // TODO: implement
+//    }
+//
+//    public void changeStoredSamplesType(int timestampFrom, int timestampTo, int fromKind, int toKind) {
+//        // TODO: implement
+//    }
 
     protected List<T> getGBActivitySamples(int timestamp_from, int timestamp_to, int activityType) {
         QueryBuilder<T> qb = getSampleDao().queryBuilder();
         qb.where(MiBandActivitySampleDao.Properties.Timestamp.ge(timestamp_from))
             .where(MiBandActivitySampleDao.Properties.Timestamp.le(timestamp_to), getClauseForActivityType(qb, activityType));
-        return qb.build().list();
+        List<T> samples = qb.build().list();
+        for (T sample : samples) {
+            ((AbstractActivitySample) sample).setProvider(this);
+        }
+        return samples;
     }
 
     private WhereCondition[] getClauseForActivityType(QueryBuilder qb, int activityTypes) {
@@ -153,16 +172,5 @@ public abstract class AbstractSampleProvider<T extends ActivitySample> implement
                 trailingConditions);
     }
 
-    public int fetchLatestTimestamp() {
-        QueryBuilder<T> qb = getSampleDao().queryBuilder();
-        qb.orderDesc(MiBandActivitySampleDao.Properties.Timestamp);
-        qb.limit(1);
-        List<T> list = qb.build().list();
-        if (list.size() >= 1) {
-            return list.get(0).getTimestamp();
-        }
-        return -1;
-    }
-
     protected abstract AbstractDao<T,?> getSampleDao();
 }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/DeviceCoordinator.java

@@ -4,6 +4,7 @@ import android.app.Activity;
 import android.content.Context;
 import android.net.Uri;
 
+import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
@@ -82,7 +83,7 @@ public interface DeviceCoordinator {
      *
      * @return
      */
-    SampleProvider getSampleProvider();
+    SampleProvider getSampleProvider(DBHandler db);
 
     /**
      * Finds an install handler for the given uri that can install the given

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/SampleProvider.java

@@ -1,6 +1,11 @@
 package nodomain.freeyourgadget.gadgetbridge.devices;
 
-public interface SampleProvider {
+import java.util.List;
+
+import nodomain.freeyourgadget.gadgetbridge.entities.AbstractActivitySample;
+import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
+
+public interface SampleProvider<T extends ActivitySample> {
     int PROVIDER_MIBAND = 0;
     int PROVIDER_PEBBLE_MORPHEUZ = 1;
     int PROVIDER_PEBBLE_GADGETBRIDGE = 2;
@@ -15,5 +20,17 @@ public interface SampleProvider {
 
     float normalizeIntensity(int rawIntensity);
 
+    List<T> getAllActivitySamples(int timestamp_from, int timestamp_to);
+
+    List<T> getActivitySamples(int timestamp_from, int timestamp_to);
+
+    List<T> getSleepSamples(int timestamp_from, int timestamp_to);
+
+    int fetchLatestTimestamp();
+
+    void addGBActivitySample(AbstractActivitySample activitySample);
+
+    void addGBActivitySamples(AbstractActivitySample[] activitySamples);
+
     int getID();
 }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/UnknownDeviceCoordinator.java

@@ -4,14 +4,17 @@ import android.app.Activity;
 import android.content.Context;
 import android.net.Uri;
 
+import java.util.List;
+
 import nodomain.freeyourgadget.gadgetbridge.activities.ControlCenter;
+import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
+import nodomain.freeyourgadget.gadgetbridge.entities.AbstractActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivityKind;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
 
 public class UnknownDeviceCoordinator extends AbstractDeviceCoordinator {
-    private final UnknownSampleProvider sampleProvider;
 
     private static final class UnknownSampleProvider implements SampleProvider {
         @Override
@@ -29,6 +32,34 @@ public class UnknownDeviceCoordinator extends AbstractDeviceCoordinator {
             return 0;
         }
 
+        @Override
+        public List getAllActivitySamples(int timestamp_from, int timestamp_to) {
+            return null;
+        }
+
+        @Override
+        public List getActivitySamples(int timestamp_from, int timestamp_to) {
+            return null;
+        }
+
+        @Override
+        public List getSleepSamples(int timestamp_from, int timestamp_to) {
+            return null;
+        }
+
+        @Override
+        public int fetchLatestTimestamp() {
+            return 0;
+        }
+
+        @Override
+        public void addGBActivitySample(AbstractActivitySample activitySample) {
+        }
+
+        @Override
+        public void addGBActivitySamples(AbstractActivitySample[] activitySamples) {
+        }
+
         @Override
         public int getID() {
             return PROVIDER_UNKNOWN;
@@ -36,7 +67,6 @@ public class UnknownDeviceCoordinator extends AbstractDeviceCoordinator {
     }
 
     public UnknownDeviceCoordinator() {
-        sampleProvider = new UnknownSampleProvider();
     }
 
     @Override
@@ -65,8 +95,8 @@ public class UnknownDeviceCoordinator extends AbstractDeviceCoordinator {
     }
 
     @Override
-    public SampleProvider getSampleProvider() {
+    public SampleProvider getSampleProvider(DBHandler db) {
-        return sampleProvider;
+        return new UnknownSampleProvider();
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBandCoordinator.java

@@ -10,6 +10,7 @@ import org.slf4j.LoggerFactory;
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.R;
 import nodomain.freeyourgadget.gadgetbridge.activities.charts.ChartsActivity;
+import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
 import nodomain.freeyourgadget.gadgetbridge.devices.AbstractDeviceCoordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.InstallHandler;
 import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
@@ -21,10 +22,8 @@ import nodomain.freeyourgadget.gadgetbridge.util.Prefs;
 
 public class MiBandCoordinator extends AbstractDeviceCoordinator {
     private static final Logger LOG = LoggerFactory.getLogger(MiBandCoordinator.class);
-    private final MiBandSampleProvider sampleProvider;
 
     public MiBandCoordinator() {
-        sampleProvider = new MiBandSampleProvider(GBApplication.getDaoSession());
     }
 
     @Override
@@ -54,8 +53,8 @@ public class MiBandCoordinator extends AbstractDeviceCoordinator {
     }
 
     @Override
-    public SampleProvider getSampleProvider() {
+    public SampleProvider getSampleProvider(DBHandler db) {
-        return sampleProvider;
+        return new MiBandSampleProvider(db.getDaoSession());
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/pebble/PebbleCoordinator.java

@@ -7,6 +7,7 @@ import android.net.Uri;
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.R;
 import nodomain.freeyourgadget.gadgetbridge.activities.AppManagerActivity;
+import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
 import nodomain.freeyourgadget.gadgetbridge.devices.AbstractDeviceCoordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.InstallHandler;
 import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
@@ -45,9 +46,9 @@ public class PebbleCoordinator extends AbstractDeviceCoordinator {
     }
 
     @Override
-    public SampleProvider getSampleProvider() {
+    public SampleProvider getSampleProvider(DBHandler db) {
         Prefs prefs = GBApplication.getPrefs();
-        DaoSession session = GBApplication.getDaoSession();
+        DaoSession session = db.getDaoSession();
         int activityTracker = prefs.getInt("pebble_activitytracker", SampleProvider.PROVIDER_PEBBLE_HEALTH);
         switch (activityTracker) {
             case SampleProvider.PROVIDER_PEBBLE_HEALTH:

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/miband/operations/FetchActivityOperation.java

@@ -18,6 +18,7 @@ import java.util.concurrent.TimeUnit;
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.R;
 import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
+import nodomain.freeyourgadget.gadgetbridge.database.DBHelper;
 import nodomain.freeyourgadget.gadgetbridge.devices.AbstractSampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandConst;
@@ -26,8 +27,10 @@ import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandSampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandService;
 import nodomain.freeyourgadget.gadgetbridge.entities.AbstractActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.entities.DaoSession;
+import nodomain.freeyourgadget.gadgetbridge.entities.Device;
 import nodomain.freeyourgadget.gadgetbridge.entities.MiBandActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.entities.MiBandActivitySampleDao;
+import nodomain.freeyourgadget.gadgetbridge.entities.User;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.service.btle.TransactionBuilder;
@@ -311,10 +314,10 @@ public class FetchActivityOperation extends AbstractMiBandOperation {
         LOG.debug("flushing activity data samples: " + activityStruct.activityDataHolderProgress / bpm);
         byte category, intensity, steps, heartrate = 0;
 
-        DBHandler dbHandler = null;
+        try (DBHandler dbHandler = GBApplication.acquireDB()){
-        try {
+            MiBandSampleProvider provider = new MiBandSampleProvider(dbHandler.getDaoSession());
-//            dbHandler = GBApplication.acquireDB();
+            Long userId = DBHelper.getUser(dbHandler.getDaoSession()).getId();
-            dbHandler = new MiBandSampleProvider(GBApplication.getDaoSession());
+            Long deviceId = DBHelper.getDevice(getDevice(), dbHandler.getDaoSession()).getId();
             int minutes = 0;
             try (SQLiteDatabase db = dbHandler.getWritableDatabase()) { // explicitly keep the db open while looping over the samples
                 int timestampInSeconds = (int) (activityStruct.activityDataTimestampProgress.getTimeInMillis() / 1000);
@@ -333,10 +336,6 @@ public class FetchActivityOperation extends AbstractMiBandOperation {
                         LOG.debug("heartrate received: " + (heartrate & 0xff));
                     }
 
-                    // TODO: user and device id
-                    Long userId = null;
-                    Long deviceId = null;
-
                     samples[minutes] = new MiBandActivitySample(
                             null,
                             timestampInSeconds,
@@ -352,16 +351,12 @@ public class FetchActivityOperation extends AbstractMiBandOperation {
                     minutes++;
                     timestampInSeconds += 60;
                 }
-                dbHandler.addGBActivitySamples(samples);
+                provider.addGBActivitySamples(samples);
             } finally {
                 activityStruct.bufferFlushed(minutes);
             }
         } catch (Exception ex) {
             GB.toast(getContext(), ex.getMessage(), Toast.LENGTH_LONG, GB.ERROR, ex);
-        } finally {
-            if (dbHandler != null) {
-                dbHandler.release();
-            }
         }
     }
 

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/AppMessageHandler.java

@@ -6,8 +6,13 @@ import android.util.Pair;
 import java.util.ArrayList;
 import java.util.UUID;
 
+import nodomain.freeyourgadget.gadgetbridge.database.DBHelper;
 import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEvent;
+import nodomain.freeyourgadget.gadgetbridge.entities.DaoSession;
+import nodomain.freeyourgadget.gadgetbridge.entities.Device;
 import nodomain.freeyourgadget.gadgetbridge.entities.PebbleActivitySample;
+import nodomain.freeyourgadget.gadgetbridge.entities.User;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 
 public class AppMessageHandler {
     protected final PebbleProtocol mPebbleProtocol;
@@ -30,10 +35,11 @@ public class AppMessageHandler {
         return null;
     }
 
-    protected PebbleActivitySample createSample(int timestamp, int intensity, int steps, int type) {
+    protected PebbleActivitySample createSample(int timestamp, int intensity, int steps, int type, User user, Device device) {
-        // TODO: user and device id
+        return new PebbleActivitySample(null, timestamp, intensity, steps, type, user.getId(), device.getId());
-        Long userId = null;
+    }
-        Long deviceId = null;
+
-        return new PebbleActivitySample(null, timestamp, intensity, steps, type, userId, deviceId);
+    protected GBDevice getDevice() {
+        return mPebbleProtocol.getDevice();
     }
 }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/AppMessageHandlerGBPebble.java

@@ -15,11 +15,15 @@ import java.util.UUID;
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.GBException;
 import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
+import nodomain.freeyourgadget.gadgetbridge.database.DBHelper;
 import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEvent;
 import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEventSendBytes;
 import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.devices.pebble.PebbleGadgetBridgeSampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.entities.AbstractActivitySample;
+import nodomain.freeyourgadget.gadgetbridge.entities.Device;
+import nodomain.freeyourgadget.gadgetbridge.entities.User;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
 
 public class AppMessageHandlerGBPebble extends AppMessageHandler {
@@ -50,10 +54,10 @@ public class AppMessageHandlerGBPebble extends AppMessageHandler {
                     int samples_remaining = samples.length / 2;
                     LOG.info("got " + samples_remaining + " samples");
                     int offset_seconds = 0;
-                    DBHandler db = null;
+                    try (DBHandler db = GBApplication.acquireDB()) {
-                    try {
+                        User user = DBHelper.getUser(db.getDaoSession());
-//                        db = GBApplication.acquireDB();
+                        Device device = DBHelper.getDevice(getDevice(), db.getDaoSession());
-                        db = new PebbleGadgetBridgeSampleProvider(GBApplication.getDaoSession());
+                        PebbleGadgetBridgeSampleProvider sampleProvider = new PebbleGadgetBridgeSampleProvider(db.getDaoSession());
                         AbstractActivitySample[] activitySamples = new AbstractActivitySample[samples_remaining];
                         int i = 0;
                         while (samples_remaining-- > 0) {
@@ -61,16 +65,12 @@ public class AppMessageHandlerGBPebble extends AppMessageHandler {
                             int type = ((sample & 0xe000) >>> 13);
                             int intensity = ((sample & 0x1f80) >>> 7);
                             int steps = (sample & 0x007f);
-                            activitySamples[i++] = createSample(timestamp + offset_seconds, intensity, steps, type);
+                            activitySamples[i++] = createSample(timestamp + offset_seconds, intensity, steps, type, user, device);
                             offset_seconds += 60;
                         }
-                        db.addGBActivitySamples(activitySamples);
+                        sampleProvider.addGBActivitySamples(activitySamples);
-//                    } catch (GBException e) {
+                    } catch (Exception e) {
-//                        LOG.error("Error acquiring database", e);
+                        LOG.error("Error acquiring database", e);
-                    } finally {
-                        if (db != null) {
-                            db.release();
-                        }
                     }
                     break;
                 default:

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/AppMessageHandlerMisfit.java

@@ -15,6 +15,7 @@ import java.util.UUID;
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.GBException;
 import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
+import nodomain.freeyourgadget.gadgetbridge.database.DBHelper;
 import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEvent;
 import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEventSendBytes;
 import nodomain.freeyourgadget.gadgetbridge.devices.pebble.MisfitSampleProvider;
@@ -41,8 +42,6 @@ public class AppMessageHandlerMisfit extends AppMessageHandler {
         super(uuid, pebbleProtocol);
     }
 
-    private final MisfitSampleProvider sampleProvider = new MisfitSampleProvider(GBApplication.getDaoSession());
-
     @Override
     public GBDeviceEvent[] handleMessage(ArrayList<Pair<Integer, Object>> pairs) {
         for (Pair<Integer, Object> pair : pairs) {
@@ -73,9 +72,9 @@ public class AppMessageHandlerMisfit extends AppMessageHandler {
 
                     int totalSteps = 0;
                     AbstractActivitySample[] activitySamples = new AbstractActivitySample[samples];
-                    // TODO: user and device id
+                    try (DBHandler db = GBApplication.acquireDB()) {
-                    Long userId =  null;
+                        Long userId = DBHelper.getUser(db.getDaoSession()).getId();
-                    Long deviceId = null;
+                        Long deviceId = DBHelper.getDevice(getDevice(), db.getDaoSession()).getId();
                         for (int i = 0; i < samples; i++) {
                             short sample = buf.getShort();
                             int steps = 0;
@@ -110,18 +109,11 @@ public class AppMessageHandlerMisfit extends AppMessageHandler {
                         }
                         LOG.info("total steps for above period: " + totalSteps);
 
-                    DBHandler db = null;
+                        MisfitSampleProvider sampleProvider = new MisfitSampleProvider(db.getDaoSession());
-                    try {
+                        sampleProvider.addGBActivitySamples(activitySamples);
-//                        db = GBApplication.acquireDB();
+                    } catch (Exception e) {
-                        db = sampleProvider;
+                        LOG.error("Error acquiring database", e);
-                        db.addGBActivitySamples(activitySamples);
+                        return null;
-//                    } catch (GBException e) {
-//                        LOG.error("Error acquiring database", e);
-//                        return null;
-                    } finally {
-                        if (db != null) {
-                            db.release();
-                        }
                     }
                     break;
                 default:

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/AppMessageHandlerMorpheuz.java

@@ -13,11 +13,15 @@ import java.util.UUID;
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.GBException;
 import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
+import nodomain.freeyourgadget.gadgetbridge.database.DBHelper;
 import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEvent;
 import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEventSendBytes;
 import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEventSleepMonitorResult;
 import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.devices.pebble.MorpheuzSampleProvider;
+import nodomain.freeyourgadget.gadgetbridge.entities.Device;
+import nodomain.freeyourgadget.gadgetbridge.entities.User;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 
 public class AppMessageHandlerMorpheuz extends AppMessageHandler {
 
@@ -90,17 +94,13 @@ public class AppMessageHandlerMorpheuz extends AppMessageHandler {
                             type = MorpheuzSampleProvider.TYPE_LIGHT_SLEEP;
                         }
                         if (index >= 0) {
-                            DBHandler db = null;
+                            try (DBHandler db = GBApplication.acquireDB()) {
-                            try {
+                                User user = DBHelper.getUser(db.getDaoSession());
-//                                db = GBApplication.acquireDB();
+                                Device device = DBHelper.getDevice(getDevice(), db.getDaoSession());
-                                db = new MorpheuzSampleProvider(GBApplication.getDaoSession());
+                                MorpheuzSampleProvider sampleProvider = new MorpheuzSampleProvider(db.getDaoSession());
-                                db.addGBActivitySample(createSample(recording_base_timestamp + index * 600, intensity, 0, type));
+                                sampleProvider.addGBActivitySample(createSample(recording_base_timestamp + index * 600, intensity, 0, type, user, device));
-//                            } catch (GBException e) {
+                            } catch (Exception e) {
-//                                LOG.error("Error acquiring database", e);
+                                LOG.error("Error acquiring database", e);
-                            } finally {
-                                if (db != null) {
-                                    db.release();
-                                }
                             }
                         }
 

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/DatalogSessionHealthSleep.java

@@ -66,10 +66,8 @@ class DatalogSessionHealthSleep extends DatalogSession {
     }
 
     private boolean store84(SleepRecord84[] sleepRecords) {
-        DBHandler dbHandler = null;
+        try (DBHandler dbHandler = GBApplication.acquireDB()) {
-        SampleProvider sampleProvider = new HealthSampleProvider(GBApplication.getDaoSession());
+            SampleProvider sampleProvider = new HealthSampleProvider(dbHandler.getDaoSession());
-        try {
-            dbHandler = GBApplication.acquireDB();
             int latestTimestamp = dbHandler.fetchLatestTimestamp(sampleProvider);
             for (SleepRecord84 sleepRecord : sleepRecords) {
                 if (latestTimestamp < (sleepRecord.timestampStart + sleepRecord.durationSeconds))
@@ -83,10 +81,6 @@ class DatalogSessionHealthSleep extends DatalogSession {
             }
         } catch (Exception ex) {
             LOG.debug(ex.getMessage());
-        } finally {
-            if (dbHandler != null) {
-                dbHandler.release();
-            }
         }
         return true;
     }
@@ -119,11 +113,9 @@ class DatalogSessionHealthSleep extends DatalogSession {
     }
 
     private boolean store83(SleepRecord83[] sleepRecords) {
-        DBHandler dbHandler = null;
+        try (DBHandler dbHandler = GBApplication.acquireDB()) {
-        SampleProvider sampleProvider = new HealthSampleProvider(GBApplication.getDaoSession());
+            SampleProvider sampleProvider = new HealthSampleProvider(dbHandler.getDaoSession());
             GB.toast("Deep sleep is supported only from firmware 3.11 onwards.", Toast.LENGTH_LONG, GB.INFO);
-        try {
-            dbHandler = GBApplication.acquireDB();
             int latestTimestamp = dbHandler.fetchLatestTimestamp(sampleProvider);
             for (SleepRecord83 sleepRecord : sleepRecords) {
                 if (latestTimestamp < sleepRecord.bedTimeEnd)
@@ -132,10 +124,6 @@ class DatalogSessionHealthSleep extends DatalogSession {
             }
         } catch (Exception ex) {
             LOG.debug(ex.getMessage());
-        } finally {
-            if (dbHandler != null) {
-                dbHandler.release();
-            }
         }
         return true;
     }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/DatalogSessionHealthSteps.java

@@ -9,11 +9,13 @@ import java.util.UUID;
 
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
+import nodomain.freeyourgadget.gadgetbridge.database.DBHelper;
 import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.devices.pebble.HealthSampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.entities.AbstractActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.entities.PebbleActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBActivitySample;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivityKind;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
 import nodomain.freeyourgadget.gadgetbridge.util.GB;
@@ -21,10 +23,12 @@ import nodomain.freeyourgadget.gadgetbridge.util.GB;
 public class DatalogSessionHealthSteps extends DatalogSession {
 
     private static final Logger LOG = LoggerFactory.getLogger(DatalogSessionHealthSteps.class);
+    private final GBDevice device;
 
-    public DatalogSessionHealthSteps(byte id, UUID uuid, int tag, byte item_type, short item_size) {
+    public DatalogSessionHealthSteps(byte id, UUID uuid, int tag, byte item_type, short item_size, GBDevice device) {
         super(id, uuid, tag, item_type, item_size);
         taginfo = "(health - steps)";
+        this.device = device;
     }
 
     @Override
@@ -72,13 +76,12 @@ public class DatalogSessionHealthSteps extends DatalogSession {
 
     private void store(StepsRecord[] stepsRecords) {
 
-        HealthSampleProvider sampleProvider = new HealthSampleProvider(GBApplication.getDaoSession());
+        try (DBHandler dbHandler = GBApplication.acquireDB()) {
-        DBHandler dbHandler = sampleProvider;
+            HealthSampleProvider sampleProvider = new HealthSampleProvider(dbHandler.getDaoSession());
-
             AbstractActivitySample[] samples = new AbstractActivitySample[stepsRecords.length];
             // TODO: user and device
-        Long userId = null;
+            Long userId = DBHelper.getUser(dbHandler.getDaoSession()).getId();
-        Long deviceId = null;
+            Long deviceId = DBHelper.getDevice(device, dbHandler.getDaoSession()).getId();
             for (int j = 0; j < stepsRecords.length; j++) {
                 StepsRecord stepsRecord = stepsRecords[j];
                 samples[j] = new PebbleActivitySample(
@@ -90,16 +93,9 @@ public class DatalogSessionHealthSteps extends DatalogSession {
                         userId, deviceId);
             }
 
-        try {
+            sampleProvider.addGBActivitySamples(samples);
-//            dbHandler = GBApplication.acquireDB();
-            dbHandler = sampleProvider;
-            dbHandler.addGBActivitySamples(samples);
         } catch (Exception ex) {
             LOG.debug(ex.getMessage());
-        } finally {
-            if (dbHandler != null) {
-                dbHandler.release();
-            }
         }
     }
 

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/PebbleProtocol.java

@@ -31,6 +31,7 @@ import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEventSendBytes;
 import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEventVersionInfo;
 import nodomain.freeyourgadget.gadgetbridge.devices.pebble.PebbleColor;
 import nodomain.freeyourgadget.gadgetbridge.devices.pebble.PebbleIconID;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceApp;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivityUser;
 import nodomain.freeyourgadget.gadgetbridge.model.CallSpec;
@@ -361,16 +362,16 @@ public class PebbleProtocol extends GBDeviceProtocol {
     private static final UUID UUID_PEBSTYLE = UUID.fromString("da05e84d-e2a2-4020-a2dc-9cdcf265fcdd");
     private static final UUID UUID_ZERO = new UUID(0, 0);
 
-    private static final Map<UUID, AppMessageHandler> mAppMessageHandlers = new HashMap<>();
+    private final Map<UUID, AppMessageHandler> mAppMessageHandlers = new HashMap<>();
 
-    {
+    public PebbleProtocol(GBDevice device) {
+        super(device);
         mAppMessageHandlers.put(UUID_GBPEBBLE, new AppMessageHandlerGBPebble(UUID_GBPEBBLE, PebbleProtocol.this));
         mAppMessageHandlers.put(UUID_MORPHEUZ, new AppMessageHandlerMorpheuz(UUID_MORPHEUZ, PebbleProtocol.this));
         mAppMessageHandlers.put(UUID_WHETHERNEAT, new AppMessageHandlerWeatherNeat(UUID_WHETHERNEAT, PebbleProtocol.this));
         mAppMessageHandlers.put(UUID_MISFIT, new AppMessageHandlerMisfit(UUID_MISFIT, PebbleProtocol.this));
         mAppMessageHandlers.put(UUID_PEBBLE_TIMESTYLE, new AppMessageHandlerTimeStylePebble(UUID_PEBBLE_TIMESTYLE, PebbleProtocol.this));
         mAppMessageHandlers.put(UUID_PEBSTYLE, new AppMessageHandlerPebStyle(UUID_PEBSTYLE, PebbleProtocol.this));
-
     }
 
     private final HashMap<Byte, DatalogSession> mDatalogSessions = new HashMap<>();
@@ -1880,7 +1881,7 @@ public class PebbleProtocol extends GBDeviceProtocol {
                 LOG.info("DATALOG OPENSESSION. id=" + (id & 0xff) + ", App UUID=" + uuid.toString() + ", log_tag=" + log_tag + ", item_type=" + item_type + ", itemSize=" + item_size);
                 if (!mDatalogSessions.containsKey(id)) {
                     if (uuid.equals(UUID_ZERO) && log_tag == 81) {
-                        mDatalogSessions.put(id, new DatalogSessionHealthSteps(id, uuid, log_tag, item_type, item_size));
+                        mDatalogSessions.put(id, new DatalogSessionHealthSteps(id, uuid, log_tag, item_type, item_size, getDevice()));
                     } else if (uuid.equals(UUID_ZERO) && (log_tag == 83 || log_tag == 84)) {
                         mDatalogSessions.put(id, new DatalogSessionHealthSleep(id, uuid, log_tag, item_type, item_size));
                     } else {

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/PebbleSupport.java

@@ -29,7 +29,7 @@ public class PebbleSupport extends AbstractSerialDeviceSupport {
 
     @Override
     protected GBDeviceProtocol createDeviceProtocol() {
-        return new PebbleProtocol();
+        return new PebbleProtocol(getDevice());
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/serial/GBDeviceProtocol.java

@@ -3,10 +3,17 @@ package nodomain.freeyourgadget.gadgetbridge.service.serial;
 import java.util.UUID;
 
 import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEvent;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.model.NotificationSpec;
 
 public abstract class GBDeviceProtocol {
 
+    private GBDevice mDevice;
+
+    protected GBDeviceProtocol(GBDevice device) {
+        mDevice = device;
+    }
+
     public byte[] encodeNotification(NotificationSpec notificationSpec) {
         return null;
     }
@@ -68,4 +75,8 @@ public abstract class GBDeviceProtocol {
     public GBDeviceEvent[] decodeResponse(byte[] responseData) {
         return null;
     }
+
+    public GBDevice getDevice() {
+        return mDevice;
+    }
 }