close NavDrawer on back press

mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/ui/activities/RacingActivity.java

@@ -153,6 +153,11 @@ public class RacingActivity extends SessionActivity implements RaceListCallbacks
             return;
         }
 
+        if (mRaceList.isDrawerOpen()) {
+            mRaceList.closeDrawer();
+            return;
+        }
+
         Fragment fragment = getFragmentManager().findFragmentById(R.id.racing_view_container);
         if (!(fragment instanceof RaceInfoFragment || fragment instanceof WelcomeFragment)) {
             if (getFragmentManager().getBackStackEntryCount() > 0) {

mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/ui/fragments/RaceListFragment.java

@@ -535,6 +535,16 @@ public class RaceListFragment extends LoggableFragment implements OnItemClickLis
         }
     }
 
+    public boolean isDrawerOpen() {
+        return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(Gravity.LEFT);
+    }
+
+    public void closeDrawer() {
+        if (mDrawerLayout != null) {
+            mDrawerLayout.closeDrawer(Gravity.LEFT);
+        }
+    }
+
     private void unregisterOnAllRaces() {
         for (ManagedRace managedRace : mManagedRacesById.values()) {
             managedRace.getState().removeChangedListener(stateListener);