From 0ee2b879b6b7d59eebea7610f06406331f992c56 Mon Sep 17 00:00:00 2001
From: Charles Munger <clm@google.com>
Date: Fri, 15 Nov 2019 11:14:10 -0800
Subject: [PATCH] Deprecate Looper.prepareMainLooper

Applications don't need to call this method.

Bug: 144042891
Test: No behavior changes
Change-Id: I0aab8619cd9afc6b672ae163fba9d17c797c9f26
---
 api/current.txt                  | 2 +-
 core/java/android/os/Looper.java | 8 +++++---
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/api/current.txt b/api/current.txt
index 1a87b2257d279..681a7551d704a 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -34671,7 +34671,7 @@ package android.os {
     method @Nullable public static android.os.Looper myLooper();
     method @NonNull public static android.os.MessageQueue myQueue();
     method public static void prepare();
-    method public static void prepareMainLooper();
+    method @Deprecated public static void prepareMainLooper();
     method public void quit();
     method public void quitSafely();
     method public void setMessageLogging(@Nullable android.util.Printer);
diff --git a/core/java/android/os/Looper.java b/core/java/android/os/Looper.java
index 3222fc43b2136..d468972df4134 100644
--- a/core/java/android/os/Looper.java
+++ b/core/java/android/os/Looper.java
@@ -112,10 +112,12 @@ public final class Looper {
 
     /**
      * Initialize the current thread as a looper, marking it as an
-     * application's main looper. The main looper for your application
-     * is created by the Android environment, so you should never need
-     * to call this function yourself.  See also: {@link #prepare()}
+     * application's main looper. See also: {@link #prepare()}
+     *
+     * @deprecated The main looper for your application is created by the Android environment,
+     *   so you should never need to call this function yourself.
      */
+    @Deprecated
     public static void prepareMainLooper() {
         prepare(false);
         synchronized (Looper.class) {