From 79dcbeea1ed6834b60c89a2870cbaa008ea522a0 Mon Sep 17 00:00:00 2001
From: Chilun <chilunhuang@google.com>
Date: Tue, 2 Nov 2021 12:01:59 +0800
Subject: [PATCH] Add manifest attribute for display across devices

Allow an activity to opt in or out from being streamed to a remote
device by the application manifest.

Also add meta-data support of apps that targeting on previous SDK.

Bug: 201712607
Test: Manual
Change-Id: If39442d19316653cacae4c060f9f374958eb92a5
---
 core/api/current.txt                              |  1 +
 core/java/android/content/pm/ActivityInfo.java    |  6 ++++++
 .../content/pm/parsing/ParsingPackageUtils.java   |  3 ++-
 .../pm/parsing/component/ParsedActivityUtils.java | 15 +++++++++++++++
 core/res/res/values/attrs_manifest.xml            |  3 +++
 core/res/res/values/public.xml                    |  1 +
 6 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/core/api/current.txt b/core/api/current.txt
index 8e3faaa4e6026..ba4c4d3a53688 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -411,6 +411,7 @@ package android {
     field public static final int calendarViewShown = 16843596; // 0x101034c
     field public static final int calendarViewStyle = 16843613; // 0x101035d
     field public static final int canControlMagnification = 16844039; // 0x1010507
+    field public static final int canDisplayOnRemoteDevices;
     field public static final int canPauseRecording = 16844314; // 0x101061a
     field public static final int canPerformGestures = 16844045; // 0x101050d
     field public static final int canRecord = 16844060; // 0x101051c
diff --git a/core/java/android/content/pm/ActivityInfo.java b/core/java/android/content/pm/ActivityInfo.java
index cbb5c2b082e2e..78852b4061917 100644
--- a/core/java/android/content/pm/ActivityInfo.java
+++ b/core/java/android/content/pm/ActivityInfo.java
@@ -447,6 +447,12 @@ public class ActivityInfo extends ComponentInfo implements Parcelable {
      * @see android.app.Activity#setVrModeEnabled(boolean, ComponentName)
      */
     public static final int FLAG_ENABLE_VR_MODE = 0x8000;
+    /**
+     * Bit in {@link #flags} indicating if the activity can be displayed on a remote device.
+     * Corresponds to {@link android.R.attr#canDisplayOnRemoteDevices}
+     * @hide
+     */
+    public static final int FLAG_CAN_DISPLAY_ON_REMOTE_DEVICES = 0x10000;
 
     /**
      * Bit in {@link #flags} indicating if the activity is always focusable regardless of if it is
diff --git a/core/java/android/content/pm/parsing/ParsingPackageUtils.java b/core/java/android/content/pm/parsing/ParsingPackageUtils.java
index d19186e9a70dc..1204d7488ecc3 100644
--- a/core/java/android/content/pm/parsing/ParsingPackageUtils.java
+++ b/core/java/android/content/pm/parsing/ParsingPackageUtils.java
@@ -52,7 +52,6 @@ import android.content.pm.SigningDetails;
 import android.content.pm.parsing.component.ComponentMutateUtils;
 import android.content.pm.parsing.component.ComponentParseUtils;
 import android.content.pm.parsing.component.ParsedActivity;
-import android.content.pm.parsing.component.ParsedActivityImpl;
 import android.content.pm.parsing.component.ParsedActivityUtils;
 import android.content.pm.parsing.component.ParsedAttribution;
 import android.content.pm.parsing.component.ParsedAttributionUtils;
@@ -194,6 +193,8 @@ public class ParsingPackageUtils {
 
     public static final String METADATA_MAX_ASPECT_RATIO = "android.max_aspect";
     public static final String METADATA_SUPPORTS_SIZE_CHANGES = "android.supports_size_changes";
+    public static final String METADATA_CAN_DISPLAY_ON_REMOTE_DEVICES =
+            "android.can_display_on_remote_devices";
     public static final String METADATA_ACTIVITY_WINDOW_LAYOUT_AFFINITY =
             "android.activity_window_layout_affinity";
     public static final String METADATA_ACTIVITY_LAUNCH_MODE = "android.activity.launch_mode";
diff --git a/core/java/android/content/pm/parsing/component/ParsedActivityUtils.java b/core/java/android/content/pm/parsing/component/ParsedActivityUtils.java
index 45241b0cb280b..2ddf923d7dd97 100644
--- a/core/java/android/content/pm/parsing/component/ParsedActivityUtils.java
+++ b/core/java/android/content/pm/parsing/component/ParsedActivityUtils.java
@@ -420,6 +420,21 @@ public class ParsedActivityUtils {
             }
         }
 
+        if (!isAlias) {
+            // Default allow the activity to be displayed on a remote device unless it explicitly
+            // set to false.
+            boolean canDisplayOnRemoteDevices = array.getBoolean(
+                    R.styleable.AndroidManifestActivity_canDisplayOnRemoteDevices, true);
+            if (activity.getMetaData() != null && !activity.getMetaData().getBoolean(
+                    ParsingPackageUtils.METADATA_CAN_DISPLAY_ON_REMOTE_DEVICES, true)) {
+                canDisplayOnRemoteDevices = false;
+            }
+            if (canDisplayOnRemoteDevices) {
+                activity.setFlags(activity.getFlags()
+                        | ActivityInfo.FLAG_CAN_DISPLAY_ON_REMOTE_DEVICES);
+            }
+        }
+
         ParseResult<ActivityInfo.WindowLayout> layoutResult =
                 resolveActivityWindowLayout(activity, input);
         if (layoutResult.isError()) {
diff --git a/core/res/res/values/attrs_manifest.xml b/core/res/res/values/attrs_manifest.xml
index 755938eefdbd8..7805d46188e9a 100644
--- a/core/res/res/values/attrs_manifest.xml
+++ b/core/res/res/values/attrs_manifest.xml
@@ -2953,6 +2953,9 @@
              usually TVs.
              <p>Requires permission {@code android.permission.DISABLE_SYSTEM_SOUND_EFFECTS}. -->
         <attr name="playHomeTransitionSound" format="boolean"/>
+        <!-- Indicates whether the activity can be displayed on a remote device which may or
+             may not be running Android. -->
+        <attr name="canDisplayOnRemoteDevices" format="boolean"/>
     </declare-styleable>
 
     <!-- The <code>activity-alias</code> tag declares a new
diff --git a/core/res/res/values/public.xml b/core/res/res/values/public.xml
index ed49fe42d9dbf..fcff77856c7bd 100644
--- a/core/res/res/values/public.xml
+++ b/core/res/res/values/public.xml
@@ -3303,6 +3303,7 @@
     <public name="sharedUserMaxSdkVersion" />
     <public name="requiredSplitTypes" />
     <public name="splitTypes" />
+    <public name="canDisplayOnRemoteDevices" />
   </staging-public-group>
 
   <staging-public-group type="id" first-id="0x01de0000">