Refactor: introduced SensorConnector interface.

src/main/java/de/dennisguse/opentracks/sensors/AltitudeSumManager.java

@@ -19,7 +19,7 @@ import de.dennisguse.opentracks.data.models.TrackPoint;
 /**
  * Estimates the altitude gain and altitude loss using the device's pressure sensor (i.e., barometer).
  */
-public class AltitudeSumManager implements SensorEventListener {
+public class AltitudeSumManager implements SensorConnector, SensorEventListener {
 
     private static final String TAG = AltitudeSumManager.class.getSimpleName();
 

src/main/java/de/dennisguse/opentracks/sensors/BluetoothRemoteSensorManager.java

@@ -52,7 +52,7 @@ import de.dennisguse.opentracks.util.PermissionRequester;
  *
  * @author Sandor Dornbush
  */
-public class BluetoothRemoteSensorManager implements BluetoothConnectionManager.SensorDataObserver {
+public class BluetoothRemoteSensorManager implements SensorConnector, BluetoothConnectionManager.SensorDataObserver {
 
     private static final String TAG = BluetoothRemoteSensorManager.class.getSimpleName();
 
@@ -121,14 +121,16 @@ public class BluetoothRemoteSensorManager implements BluetoothConnectionManager.
         bluetoothAdapter = BluetoothUtils.getAdapter(context);
     }
 
-    public void start() {
+    @Override
+    public void start(Context context, Handler handler) {
         started = true;
 
         //Registering triggers connection startup
         PreferencesUtils.registerOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);
     }
 
-    public synchronized void stop() {
+    @Override
+    public synchronized void stop(Context context) {
         heartRate.disconnect();
         cyclingCadence.disconnect();
         cyclingSpeed.disconnect();

src/main/java/de/dennisguse/opentracks/sensors/SensorConnector.java

@@ -0,0 +1,11 @@
+package de.dennisguse.opentracks.sensors;
+
+import android.content.Context;
+import android.os.Handler;
+
+public interface SensorConnector {
+
+    void start(Context context, Handler handler);
+
+    void stop(Context context);
+}