3 files changed, 31 insertions, 16 deletions
diff --git a/InCallUI/src/com/android/incallui/Call.java b/InCallUI/src/com/android/incallui/Call.java
index 7205b7326..191ffe791 100644
--- a/InCallUI/src/com/android/incallui/Call.java
+++ b/InCallUI/src/com/android/incallui/Call.java
@@ -31,6 +31,7 @@ import android.telecom.InCallService.VideoCall;
 import android.telecom.PhoneAccount;
 import android.telecom.PhoneAccountHandle;
 import android.telecom.VideoProfile;
+import android.telephony.PhoneNumberUtils;
 import android.text.TextUtils;
 
 import java.util.ArrayList;
@@ -244,6 +245,8 @@ public class Call {
             };
 
     private android.telecom.Call mTelecommCall;
+    private boolean mIsEmergencyCall;
+    private Uri mHandle;
     private final String mId;
     private int mState = State.INVALID;
     private DisconnectCause mDisconnectCause;
@@ -273,6 +276,7 @@ public class Call {
     public Call(android.telecom.Call telecommCall) {
         mTelecommCall = telecommCall;
         mId = ID_PREFIX + Integer.toString(sIdCounter++);
+
         updateFromTelecommCall();
         mTelecommCall.registerCallback(mTelecomCallCallback);
     }
@@ -361,6 +365,14 @@ public class Call {
                 }
             }
         }
+
+        // If the handle of the call has changed, update state for the call determining if it is an
+        // emergency call.
+        Uri newHandle = mTelecommCall.getDetails().getHandle();
+        if (!Objects.equals(mHandle, newHandle)) {
+            mHandle = newHandle;
+            updateEmergencyCallState();
+        }
     }
 
     private static int translateState(int state) {
@@ -406,6 +418,10 @@ public class Call {
         return mTelecommCall == null ? null : mTelecommCall.getDetails().getHandle();
     }
 
+    public boolean isEmergencyCall() {
+        return mIsEmergencyCall;
+    }
+
     public int getState() {
         if (mTelecommCall != null && mTelecommCall.getParent() != null) {
             return State.CONFERENCED;
@@ -574,7 +590,7 @@ public class Call {
     public void setSessionModificationState(int state) {
         if (state == Call.SessionModificationState.RECEIVED_UPGRADE_TO_VIDEO_REQUEST) {
             Log.e(this,
-            "setSessionModificationState not to be called for RECEIVED_UPGRADE_TO_VIDEO_REQUEST");
+                    "setSessionModificationState not to be called for RECEIVED_UPGRADE_TO_VIDEO_REQUEST");
             return;
         }
 
@@ -587,6 +603,16 @@ public class Call {
         }
     }
 
+    /**
+     * Determines if the call handle is an emergency number or not and caches the result to avoid
+     * repeated calls to isEmergencyNumber.
+     */
+    private void updateEmergencyCallState() {
+        Uri handle = mTelecommCall.getDetails().getHandle();
+        mIsEmergencyCall = PhoneNumberUtils.isEmergencyNumber(
+                handle == null ? "" : handle.getSchemeSpecificPart());
+    }
+
     private void setModifyToVideoState(int newVideoState) {
         mModifyToVideoState = newVideoState;
     }
diff --git a/InCallUI/src/com/android/incallui/CallCardPresenter.java b/InCallUI/src/com/android/incallui/CallCardPresenter.java
index 00343fcf3..2f81298ba 100644
--- a/InCallUI/src/com/android/incallui/CallCardPresenter.java
+++ b/InCallUI/src/com/android/incallui/CallCardPresenter.java
@@ -437,11 +437,9 @@ public class CallCardPresenter extends Presenter<CallCardPresenter.CallCardUi>
         // 1. This is an emergency call.
         // 2. The phone is in Emergency Callback Mode, which means we should show the callback
         //    number.
-        boolean isEmergencyCall = PhoneNumberUtils.isEmergencyNumber(
-                getNumberFromHandle(mPrimary.getHandle()));
         boolean showCallbackNumber = mPrimary.hasProperty(Details.PROPERTY_EMERGENCY_CALLBACK_MODE);
 
-        if (isEmergencyCall || showCallbackNumber) {
+        if (mPrimary.isEmergencyCall() || showCallbackNumber) {
             callbackNumber = getSubscriptionNumber();
         } else {
             StatusHints statusHints = mPrimary.getTelecommCall().getDetails().getStatusHints();
@@ -461,7 +459,7 @@ public class CallCardPresenter extends Presenter<CallCardPresenter.CallCardUi>
             callbackNumber = null;
         }
 
-        getUi().setCallbackNumber(callbackNumber, isEmergencyCall || showCallbackNumber);
+        getUi().setCallbackNumber(callbackNumber, mPrimary.isEmergencyCall() || showCallbackNumber);
     }
 
     public void updateCallTime() {
@@ -665,8 +663,7 @@ public class CallCardPresenter extends Presenter<CallCardPresenter.CallCardUi>
         }
 
         if (mEmergencyCallListener != null) {
-            boolean isEmergencyCall = PhoneNumberUtils.isEmergencyNumber(
-                    getNumberFromHandle(mPrimary.getHandle()));
+            boolean isEmergencyCall = mPrimary.isEmergencyCall();
             mEmergencyCallListener.onCallUpdated((BaseFragment) ui, isEmergencyCall);
         }
     }
diff --git a/InCallUI/src/com/android/incallui/InCallPresenter.java b/InCallUI/src/com/android/incallui/InCallPresenter.java
index cf162c728..2d7d40a1d 100644
--- a/InCallUI/src/com/android/incallui/InCallPresenter.java
+++ b/InCallUI/src/com/android/incallui/InCallPresenter.java
@@ -1138,7 +1138,7 @@ public class InCallPresenter implements CallList.Listener,
      * call.
      */
     public static boolean isCallWithNoValidAccounts(Call call) {
-        if (call != null && !isEmergencyCall(call)) {
+        if (call != null && !call.isEmergencyCall()) {
             Bundle extras = call.getIntentExtras();
 
             if (extras == null) {
@@ -1157,14 +1157,6 @@ public class InCallPresenter implements CallList.Listener,
         return false;
     }
 
-    private static boolean isEmergencyCall(Call call) {
-        final Uri handle = call.getHandle();
-        if (handle == null) {
-            return false;
-        }
-        return PhoneNumberUtils.isEmergencyNumber(handle.getSchemeSpecificPart());
-    }
-
     /**
      * Sets the DisconnectCause for a call that was disconnected because it was missing a
      * PhoneAccount or PhoneAccounts to select from.