From 51396777aa1da55b73d6881ae9fb5cd086a34842 Mon Sep 17 00:00:00 2001
From: Conrad Chen <conradchen@google.com>
Date: Wed, 8 Mar 2017 17:07:16 -0800
Subject: [PATCH] Block modifying channel IDs of preview programs

Test: cts-tradefed run cts -m CtsTvTestCases
Bug: 34466631
Change-Id: I9f16bfa23f6920292752465b40860b162fe9465e
---
 media/java/android/media/tv/TvContract.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/media/java/android/media/tv/TvContract.java b/media/java/android/media/tv/TvContract.java
index 6e15d8da0033f..62fd39516b85e 100644
--- a/media/java/android/media/tv/TvContract.java
+++ b/media/java/android/media/tv/TvContract.java
@@ -2679,6 +2679,9 @@ public final class TvContract {
         /**
          * The ID of the TV channel that provides this TV program.
          *
+         * <p>This value cannot be changed once it's set. Trying to modify it will make the update
+         * fail.
+         *
          * <p>This is a part of the channel URI and matches to {@link BaseColumns#_ID}.
          *
          * <p>This is a required field.