From a7d023057241b887341360ef5c4125826d716430 Mon Sep 17 00:00:00 2001
From: Hall Liu <hallliu@google.com>
Date: Wed, 31 Oct 2018 17:03:34 -0700
Subject: Add TestApi to get RTT support status

Add a TestApi for CTS to be able to tell whether a device supports RTT
on the current carrier.

Bug: 113069001
Test: manual
Change-Id: I135338b7b83f888d454d09dddd30c72197fe0533
---
 api/test-current.txt                                |  1 +
 .../java/android/telephony/TelephonyManager.java    | 21 +++++++++++++++++++++
 .../com/android/internal/telephony/ITelephony.aidl  |  2 ++
 3 files changed, 24 insertions(+)

diff --git a/api/test-current.txt b/api/test-current.txt
index 890482eb0655..c09ff9880ce7 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -988,6 +988,7 @@ package android.telephony {
 
   public class TelephonyManager {
     method public int getCarrierIdListVersion();
+    method public boolean isRttSupported();
     method public void refreshUiccProfile();
     method public void setCarrierTestOverride(java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String);
     field public static final int UNKNOWN_CARRIER_ID_LIST_VERSION = -1; // 0xffffffff
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 0ad2cbec6100..fc86c654f9b1 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -7326,6 +7326,27 @@ public class TelephonyManager {
         return false;
     }
 
+    /**
+     * Determines whether the device currently supports RTT (Real-time text). Based both on carrier
+     * support for the feature and device firmware support.
+     *
+     * @return {@code true} if the device and carrier both support RTT, {@code false} otherwise.
+     * @hide
+     */
+    @TestApi
+    public boolean isRttSupported() {
+        try {
+            ITelephony telephony = getITelephony();
+            if (telephony != null) {
+                return telephony.isRttSupported(mSubId);
+            }
+        } catch (RemoteException e) {
+            Log.e(TAG, "Error calling ITelephony#isRttSupported", e);
+        } catch (SecurityException e) {
+            Log.e(TAG, "Permission error calling ITelephony#isWorldPhone", e);
+        }
+        return false;
+    }
     /**
      * Whether the phone supports hearing aid compatibility.
      *
diff --git a/telephony/java/com/android/internal/telephony/ITelephony.aidl b/telephony/java/com/android/internal/telephony/ITelephony.aidl
index 84c2a5d78018..96d9c3ab2681 100644
--- a/telephony/java/com/android/internal/telephony/ITelephony.aidl
+++ b/telephony/java/com/android/internal/telephony/ITelephony.aidl
@@ -1038,6 +1038,8 @@ interface ITelephony {
      */
     boolean isTtyModeSupported();
 
+    boolean isRttSupported(int subscriptionId);
+
     /**
      * Whether the phone supports hearing aid compatibility.
      *
-- 
cgit v1.2.3-59-g8ed1b