diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index db34124..0073dde 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -2679,6 +2679,7 @@
     public static final int CALLBACK_IP_CHANGED          = BASE + 7;
     /** @hide */
     public static final int CALLBACK_RELEASED            = BASE + 8;
+    // TODO: consider deleting CALLBACK_EXIT and shifting following enum codes down by 1.
     /** @hide */
     public static final int CALLBACK_EXIT                = BASE + 9;
     /** @hide obj = NetworkCapabilities, arg1 = seq number */
@@ -2790,24 +2791,16 @@
                     break;
                 }
                 case CALLBACK_RELEASED: {
-                    NetworkCallback callback = null;
+                    final NetworkCallback callback;
                     synchronized(sCallbacks) {
                         callback = sCallbacks.remove(request);
                     }
-                    if (callback != null) {
-                        synchronized(sCallbackRefCount) {
-                            if (sCallbackRefCount.decrementAndGet() == 0) {
-                                getLooper().quit();
-                            }
-                        }
-                    } else {
+                    if (callback == null) {
                         Log.e(TAG, "callback not found for RELEASED message");
                     }
                     break;
                 }
                 case CALLBACK_EXIT: {
-                    Log.d(TAG, "Listener quitting");
-                    getLooper().quit();
                     break;
                 }
                 case EXPIRE_LEGACY_REQUEST: {
@@ -2833,49 +2826,40 @@
         }
     }
 
-    private void incCallbackHandlerRefCount() {
-        synchronized(sCallbackRefCount) {
-            if (sCallbackRefCount.incrementAndGet() == 1) {
-                // TODO: switch this to ConnectivityThread
-                HandlerThread callbackThread = new HandlerThread("ConnectivityManager");
-                callbackThread.start();
-                sCallbackHandler = new CallbackHandler(callbackThread.getLooper());
+    private CallbackHandler getHandler() {
+        synchronized (sCallbacks) {
+            if (sCallbackHandler == null) {
+                sCallbackHandler = new CallbackHandler(ConnectivityThread.getInstanceLooper());
             }
-        }
-    }
-
-    private void decCallbackHandlerRefCount() {
-        synchronized(sCallbackRefCount) {
-            if (sCallbackRefCount.decrementAndGet() == 0) {
-                sCallbackHandler.obtainMessage(CALLBACK_EXIT).sendToTarget();
-                sCallbackHandler = null;
-            }
+            return sCallbackHandler;
         }
     }
 
     static final HashMap<NetworkRequest, NetworkCallback> sCallbacks = new HashMap<>();
-    static final AtomicInteger sCallbackRefCount = new AtomicInteger(0);
-    static CallbackHandler sCallbackHandler = null;
+    static CallbackHandler sCallbackHandler;
 
     private final static int LISTEN  = 1;
     private final static int REQUEST = 2;
 
     private NetworkRequest sendRequestForNetwork(NetworkCapabilities need,
-            NetworkCallback networkCallback, int timeoutMs, int action,
-            int legacyType) {
-        if (networkCallback == null) {
+            NetworkCallback callback, int timeoutMs, int action, int legacyType) {
+        return sendRequestForNetwork(need, callback, getHandler(), timeoutMs, action, legacyType);
+    }
+
+    private NetworkRequest sendRequestForNetwork(NetworkCapabilities need,
+            NetworkCallback callback, Handler handler, int timeoutMs, int action, int legacyType) {
+        if (callback == null) {
             throw new IllegalArgumentException("null NetworkCallback");
         }
         if (need == null && action != REQUEST) {
             throw new IllegalArgumentException("null NetworkCapabilities");
         }
-        // TODO: throw an exception if networkCallback.networkRequest is not null.
+        // TODO: throw an exception if callback.networkRequest is not null.
         // http://b/20701525
         final NetworkRequest request;
         try {
-            incCallbackHandlerRefCount();
             synchronized(sCallbacks) {
-                Messenger messenger = new Messenger(sCallbackHandler);
+                Messenger messenger = new Messenger(handler);
                 Binder binder = new Binder();
                 if (action == LISTEN) {
                     request = mService.listenForNetwork(need, messenger, binder);
@@ -2884,16 +2868,13 @@
                             need, messenger, timeoutMs, binder, legacyType);
                 }
                 if (request != null) {
-                    sCallbacks.put(request, networkCallback);
+                    sCallbacks.put(request, callback);
                 }
-                networkCallback.networkRequest = request;
+                callback.networkRequest = request;
             }
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
-        if (request == null) {
-            decCallbackHandlerRefCount();
-        }
         return request;
     }