Gives the user the ability to find out whether the service is being shutdown in order to avoid executing nodes after calling shutdown on it.

android_10/src/org/ros/android/NodeMainExecutorService.java

@@ -75,6 +75,7 @@ public class NodeMainExecutorService extends Service implements NodeMainExecutor
   private final IBinder binder;
   private final ListenerGroup<NodeMainExecutorServiceListener> listeners;
 
+  private boolean isShuttingDown;
   private Handler handler;
   private WakeLock wakeLock;
   private WifiLock wifiLock;
@@ -174,6 +175,7 @@ public class NodeMainExecutorService extends Service implements NodeMainExecutor
   }
 
   public void forceShutdown() {
+    isShuttingDown = true;
     signalOnShutdown();
     nodeMainExecutor.addListener(new NodeMainExecutorListener() {
       @Override
@@ -185,6 +187,10 @@ public class NodeMainExecutorService extends Service implements NodeMainExecutor
     nodeMainExecutor.shutdown();
   }
 
+  public boolean isShuttingDown() {
+    return isShuttingDown;
+  }
+
   public void addNodeMainExecutorServiceListener(final NodeMainExecutorServiceListener listener) {
     listeners.add(listener);
   }