1 files changed, 43 insertions, 5 deletions

diff --git a/core/java/android/service/carrier/CarrierService.java b/core/java/android/service/carrier/CarrierService.java
index 4a4a375..4d21939 100644
--- a/core/java/android/service/carrier/CarrierService.java
+++ b/core/java/android/service/carrier/CarrierService.java
@@ -14,10 +14,15 @@
 
 package android.service.carrier;
 
+import android.annotation.CallSuper;
 import android.app.Service;
 import android.content.Intent;
 import android.os.IBinder;
 import android.os.PersistableBundle;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+
+import com.android.internal.telephony.ITelephonyRegistry;
 
 /**
  * A service that exposes carrier-specific functionality to the system.
@@ -45,10 +50,16 @@ public abstract class CarrierService extends Service {
     public static final String CONFIG_SERVICE_INTERFACE = "android.service.carrier.ConfigService";
     public static final String BIND_SERVICE_INTERFACE = "android.service.carrier.BindService";
 
+    private static ITelephonyRegistry sRegistry;
+
     private final ICarrierService.Stub mStubWrapper;
 
     public CarrierService() {
         mStubWrapper = new ICarrierServiceWrapper();
+        if (sRegistry == null) {
+            sRegistry = ITelephonyRegistry.Stub.asInterface(
+                    ServiceManager.getService("telephony.registry"));
+        }
     }
 
     /**
@@ -83,9 +94,39 @@ public abstract class CarrierService extends Service {
      */
     public abstract PersistableBundle onLoadConfig(CarrierIdentifier id);
 
-    /** @hide */
+    /**
+     * Informs the system of an intentional upcoming carrier network change by
+     * a carrier app. This call is optional and is only used to allow the
+     * system to provide alternative UI while telephony is performing an action
+     * that may result in intentional, temporary network lack of connectivity.
+     * <p>
+     * Based on the active parameter passed in, this method will either show or
+     * hide the alternative UI. There is no timeout associated with showing
+     * this UX, so a carrier app must be sure to call with active set to false
+     * sometime after calling with it set to true.
+     * <p>
+     * Requires Permission:
+     *   {@link android.Manifest.permission#MODIFY_PHONE_STATE MODIFY_PHONE_STATE}
+     * Or the calling app has carrier privileges.
+     *   @see {@link android.telephony.TelephonyManager#hasCarrierPrivileges}
+     *
+     * @param active Whether the carrier network change is or shortly will be
+     *               active. Set this value to true to begin showing
+     *               alternative UI and false to stop.
+     */
+    public final void notifyCarrierNetworkChange(boolean active) {
+        try {
+            if (sRegistry != null) sRegistry.notifyCarrierNetworkChange(active);
+        } catch (RemoteException | NullPointerException ex) {}
+    }
+
+    /**
+     * If overriding this method, call through to the super method for any unknown actions.
+     * {@inheritDoc}
+     */
     @Override
-    public final IBinder onBind(Intent intent) {
+    @CallSuper
+    public IBinder onBind(Intent intent) {
         switch (intent.getAction()) {
             case CONFIG_SERVICE_INTERFACE:
             case BIND_SERVICE_INTERFACE:
@@ -98,11 +139,8 @@ public abstract class CarrierService extends Service {
     /**
      * A wrapper around ICarrierService that forwards calls to implementations of
      * {@link CarrierService}.
-     *
-     * @hide
      */
     private class ICarrierServiceWrapper extends ICarrierService.Stub {
-
         @Override
         public PersistableBundle getCarrierConfig(CarrierIdentifier id) {
             return CarrierService.this.onLoadConfig(id);