diff --git a/core/java/android/nfc/cardemulation/CardEmulation.java b/core/java/android/nfc/cardemulation/CardEmulation.java
index 2b34d86..0b56d19 100644
--- a/core/java/android/nfc/cardemulation/CardEmulation.java
+++ b/core/java/android/nfc/cardemulation/CardEmulation.java
@@ -209,7 +209,8 @@
      */
     public boolean isDefaultServiceForCategory(ComponentName service, String category) {
         try {
-            return sService.isDefaultServiceForCategory(mContext.getUserId(), service, category);
+            return sService.isDefaultServiceForCategory(mContext.getUser().getIdentifier(),
+                    service, category);
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -218,8 +219,8 @@
                 return false;
             }
             try {
-                return sService.isDefaultServiceForCategory(mContext.getUserId(), service,
-                        category);
+                return sService.isDefaultServiceForCategory(mContext.getUser().getIdentifier(),
+                        service, category);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to recover CardEmulationService.");
                 return false;
@@ -240,7 +241,8 @@
      */
     public boolean isDefaultServiceForAid(ComponentName service, String aid) {
         try {
-            return sService.isDefaultServiceForAid(mContext.getUserId(), service, aid);
+            return sService.isDefaultServiceForAid(mContext.getUser().getIdentifier(),
+                    service, aid);
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -249,7 +251,8 @@
                 return false;
             }
             try {
-                return sService.isDefaultServiceForAid(mContext.getUserId(), service, aid);
+                return sService.isDefaultServiceForAid(mContext.getUser().getIdentifier(),
+                        service, aid);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
                 return false;
@@ -348,7 +351,8 @@
             List<String> aids) {
         AidGroup aidGroup = new AidGroup(aids, category);
         try {
-            return sService.registerAidGroupForService(mContext.getUserId(), service, aidGroup);
+            return sService.registerAidGroupForService(mContext.getUser().getIdentifier(),
+                    service, aidGroup);
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -357,8 +361,8 @@
                 return false;
             }
             try {
-                return sService.registerAidGroupForService(mContext.getUserId(), service,
-                        aidGroup);
+                return sService.registerAidGroupForService(mContext.getUser().getIdentifier(),
+                        service, aidGroup);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
                 return false;
@@ -391,7 +395,7 @@
         }
 
         try {
-            return sService.unsetOffHostForService(mContext.getUserId(), service);
+            return sService.unsetOffHostForService(mContext.getUser().getIdentifier(), service);
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -400,7 +404,7 @@
                 return false;
             }
             try {
-                return sService.unsetOffHostForService(mContext.getUserId(), service);
+                return sService.unsetOffHostForService(mContext.getUser().getIdentifier(), service);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
                 return false;
@@ -468,7 +472,7 @@
         }
 
         try {
-            return sService.setOffHostForService(mContext.getUserId(), service,
+            return sService.setOffHostForService(mContext.getUser().getIdentifier(), service,
                 offHostSecureElement);
         } catch (RemoteException e) {
             // Try one more time
@@ -478,7 +482,7 @@
                 return false;
             }
             try {
-                return sService.setOffHostForService(mContext.getUserId(), service,
+                return sService.setOffHostForService(mContext.getUser().getIdentifier(), service,
                         offHostSecureElement);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
@@ -503,8 +507,8 @@
      */
     public List<String> getAidsForService(ComponentName service, String category) {
         try {
-            AidGroup group =  sService.getAidGroupForService(mContext.getUserId(), service,
-                    category);
+            AidGroup group =  sService.getAidGroupForService(mContext.getUser().getIdentifier(),
+                    service, category);
             return (group != null ? group.getAids() : null);
         } catch (RemoteException e) {
             recoverService();
@@ -513,8 +517,8 @@
                 return null;
             }
             try {
-                AidGroup group = sService.getAidGroupForService(mContext.getUserId(), service,
-                        category);
+                AidGroup group = sService.getAidGroupForService(mContext.getUser().getIdentifier(),
+                        service, category);
                 return (group != null ? group.getAids() : null);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to recover CardEmulationService.");
@@ -540,7 +544,8 @@
      */
     public boolean removeAidsForService(ComponentName service, String category) {
         try {
-            return sService.removeAidGroupForService(mContext.getUserId(), service, category);
+            return sService.removeAidGroupForService(mContext.getUser().getIdentifier(), service,
+                    category);
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -549,7 +554,8 @@
                 return false;
             }
             try {
-                return sService.removeAidGroupForService(mContext.getUserId(), service, category);
+                return sService.removeAidGroupForService(mContext.getUser().getIdentifier(),
+                        service, category);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
                 return false;
@@ -684,7 +690,8 @@
     @Nullable
     public List<String> getAidsForPreferredPaymentService() {
         try {
-            ApduServiceInfo serviceInfo = sService.getPreferredPaymentService(mContext.getUserId());
+            ApduServiceInfo serviceInfo = sService.getPreferredPaymentService(
+                    mContext.getUser().getIdentifier());
             return (serviceInfo != null ? serviceInfo.getAids() : null);
         } catch (RemoteException e) {
             recoverService();
@@ -694,7 +701,7 @@
             }
             try {
                 ApduServiceInfo serviceInfo =
-                        sService.getPreferredPaymentService(mContext.getUserId());
+                        sService.getPreferredPaymentService(mContext.getUser().getIdentifier());
                 return (serviceInfo != null ? serviceInfo.getAids() : null);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to recover CardEmulationService.");
@@ -723,7 +730,8 @@
     @Nullable
     public String getRouteDestinationForPreferredPaymentService() {
         try {
-            ApduServiceInfo serviceInfo = sService.getPreferredPaymentService(mContext.getUserId());
+            ApduServiceInfo serviceInfo = sService.getPreferredPaymentService(
+                    mContext.getUser().getIdentifier());
             if (serviceInfo != null) {
                 if (!serviceInfo.isOnHost()) {
                     return serviceInfo.getOffHostSecureElement() == null ?
@@ -740,7 +748,7 @@
             }
             try {
                 ApduServiceInfo serviceInfo =
-                        sService.getPreferredPaymentService(mContext.getUserId());
+                        sService.getPreferredPaymentService(mContext.getUser().getIdentifier());
                 if (serviceInfo != null) {
                     if (!serviceInfo.isOnHost()) {
                         return serviceInfo.getOffHostSecureElement() == null ?
@@ -766,7 +774,8 @@
     @Nullable
     public CharSequence getDescriptionForPreferredPaymentService() {
         try {
-            ApduServiceInfo serviceInfo = sService.getPreferredPaymentService(mContext.getUserId());
+            ApduServiceInfo serviceInfo = sService.getPreferredPaymentService(
+                    mContext.getUser().getIdentifier());
             return (serviceInfo != null ? serviceInfo.getDescription() : null);
         } catch (RemoteException e) {
             recoverService();
@@ -776,7 +785,7 @@
             }
             try {
                 ApduServiceInfo serviceInfo =
-                        sService.getPreferredPaymentService(mContext.getUserId());
+                        sService.getPreferredPaymentService(mContext.getUser().getIdentifier());
                 return (serviceInfo != null ? serviceInfo.getDescription() : null);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to recover CardEmulationService.");
@@ -790,7 +799,8 @@
      */
     public boolean setDefaultServiceForCategory(ComponentName service, String category) {
         try {
-            return sService.setDefaultServiceForCategory(mContext.getUserId(), service, category);
+            return sService.setDefaultServiceForCategory(mContext.getUser().getIdentifier(),
+                    service, category);
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -799,8 +809,8 @@
                 return false;
             }
             try {
-                return sService.setDefaultServiceForCategory(mContext.getUserId(), service,
-                        category);
+                return sService.setDefaultServiceForCategory(mContext.getUser().getIdentifier(),
+                        service, category);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
                 return false;
@@ -813,7 +823,7 @@
      */
     public boolean setDefaultForNextTap(ComponentName service) {
         try {
-            return sService.setDefaultForNextTap(mContext.getUserId(), service);
+            return sService.setDefaultForNextTap(mContext.getUser().getIdentifier(), service);
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -822,7 +832,7 @@
                 return false;
             }
             try {
-                return sService.setDefaultForNextTap(mContext.getUserId(), service);
+                return sService.setDefaultForNextTap(mContext.getUser().getIdentifier(), service);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
                 return false;
@@ -857,7 +867,7 @@
      */
     public List<ApduServiceInfo> getServices(String category) {
         try {
-            return sService.getServices(mContext.getUserId(), category);
+            return sService.getServices(mContext.getUser().getIdentifier(), category);
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -866,7 +876,7 @@
                 return null;
             }
             try {
-                return sService.getServices(mContext.getUserId(), category);
+                return sService.getServices(mContext.getUser().getIdentifier(), category);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
                 return null;
diff --git a/core/java/android/nfc/cardemulation/NfcFCardEmulation.java b/core/java/android/nfc/cardemulation/NfcFCardEmulation.java
index 557e41a..3c92455 100644
--- a/core/java/android/nfc/cardemulation/NfcFCardEmulation.java
+++ b/core/java/android/nfc/cardemulation/NfcFCardEmulation.java
@@ -117,7 +117,7 @@
             throw new NullPointerException("service is null");
         }
         try {
-            return sService.getSystemCodeForService(mContext.getUserId(), service);
+            return sService.getSystemCodeForService(mContext.getUser().getIdentifier(), service);
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -126,7 +126,8 @@
                 return null;
             }
             try {
-                return sService.getSystemCodeForService(mContext.getUserId(), service);
+                return sService.getSystemCodeForService(mContext.getUser().getIdentifier(),
+                        service);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
                 ee.rethrowAsRuntimeException();
@@ -163,7 +164,7 @@
             throw new NullPointerException("service or systemCode is null");
         }
         try {
-            return sService.registerSystemCodeForService(mContext.getUserId(),
+            return sService.registerSystemCodeForService(mContext.getUser().getIdentifier(),
                     service, systemCode);
         } catch (RemoteException e) {
             // Try one more time
@@ -173,7 +174,7 @@
                 return false;
             }
             try {
-                return sService.registerSystemCodeForService(mContext.getUserId(),
+                return sService.registerSystemCodeForService(mContext.getUser().getIdentifier(),
                         service, systemCode);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
@@ -194,7 +195,7 @@
             throw new NullPointerException("service is null");
         }
         try {
-            return sService.removeSystemCodeForService(mContext.getUserId(), service);
+            return sService.removeSystemCodeForService(mContext.getUser().getIdentifier(), service);
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -203,7 +204,8 @@
                 return false;
             }
             try {
-                return sService.removeSystemCodeForService(mContext.getUserId(), service);
+                return sService.removeSystemCodeForService(mContext.getUser().getIdentifier(),
+                        service);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
                 ee.rethrowAsRuntimeException();
@@ -229,7 +231,7 @@
             throw new NullPointerException("service is null");
         }
         try {
-            return sService.getNfcid2ForService(mContext.getUserId(), service);
+            return sService.getNfcid2ForService(mContext.getUser().getIdentifier(), service);
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -238,7 +240,7 @@
                 return null;
             }
             try {
-                return sService.getNfcid2ForService(mContext.getUserId(), service);
+                return sService.getNfcid2ForService(mContext.getUser().getIdentifier(), service);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
                 ee.rethrowAsRuntimeException();
@@ -272,7 +274,7 @@
             throw new NullPointerException("service or nfcid2 is null");
         }
         try {
-            return sService.setNfcid2ForService(mContext.getUserId(),
+            return sService.setNfcid2ForService(mContext.getUser().getIdentifier(),
                     service, nfcid2);
         } catch (RemoteException e) {
             // Try one more time
@@ -282,7 +284,7 @@
                 return false;
             }
             try {
-                return sService.setNfcid2ForService(mContext.getUserId(),
+                return sService.setNfcid2ForService(mContext.getUser().getIdentifier(),
                         service, nfcid2);
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
@@ -380,7 +382,7 @@
      */
     public List<NfcFServiceInfo> getNfcFServices() {
         try {
-            return sService.getNfcFServices(mContext.getUserId());
+            return sService.getNfcFServices(mContext.getUser().getIdentifier());
         } catch (RemoteException e) {
             // Try one more time
             recoverService();
@@ -389,7 +391,7 @@
                 return null;
             }
             try {
-                return sService.getNfcFServices(mContext.getUserId());
+                return sService.getNfcFServices(mContext.getUser().getIdentifier());
             } catch (RemoteException ee) {
                 Log.e(TAG, "Failed to reach CardEmulationService.");
                 return null;