Add hold support to frameworks/base/telecomm

Bug: 13169202

Change-Id: Ib01990c1f8654f95a4cfcca4a91f0ab143722d8e

telecomm/java/android/telecomm/InCallService.java

@@ -39,6 +39,7 @@ public abstract class InCallService extends Service {
     private static final int MSG_ADD_CALL = 2;
     private static final int MSG_SET_ACTIVE = 3;
     private static final int MSG_SET_DISCONNECTED = 4;
+    private static final int MSG_SET_HOLD = 5;
 
     /** Default Handler used to consolidate binder method calls onto a single thread. */
     private final Handler mHandler = new Handler(Looper.getMainLooper()) {
@@ -58,6 +59,8 @@ public abstract class InCallService extends Service {
                 case MSG_SET_DISCONNECTED:
                     setDisconnected((String) msg.obj);
                     break;
+                case MSG_SET_HOLD:
+                    setOnHold((String) msg.obj);
                 default:
                     break;
             }
@@ -89,6 +92,12 @@ public abstract class InCallService extends Service {
         public void setDisconnected(String callId) {
             mHandler.obtainMessage(MSG_SET_DISCONNECTED, callId).sendToTarget();
         }
+
+        /** {@inheritDoc} */
+        @Override
+        public void setOnHold(String callId) {
+            mHandler.obtainMessage(MSG_SET_HOLD, callId).sendToTarget();
+        }
     }
 
     private final InCallServiceBinder mBinder;
@@ -136,4 +145,12 @@ public abstract class InCallService extends Service {
      * @param callId The identifier of the call that was disconnected.
      */
     protected abstract void setDisconnected(String callId);
+
+    /**
+     * Indicates to the in-call app that a call has been moved to the
+     * {@link android.telecomm.CallState#ON_HOLD} state and the user should be notified.
+     *
+     * @param callId The identifier of the call that was put on hold.
+     */
+    protected abstract void setOnHold(String callId);
 }