Commit 8169a9f3 authored Oct 26, 2023 by Jesper Hansson Committed by Sahil Sonar Jul 25, 2024

Allow ACTIVITY_TYPE_RECENTS to have multiple root tasks

A guest user having a third party launcher cannot open Recents.

When the preinstalled launcher is used, the built-in recents
implementation will be used (QuickstepLauncher.java) and
which means there won't be any task with activityType "recents"
in the display stack, because Home and Recents are the same.

When a third party launcher is used, the fallback recents activity
will be launched (com.android.quickstep.RecentsActivity).

When this RecentsActivity is created, a new task with activity type
"recents" is created and this task remains in the display stack
after the current user is switched to a guest user.
When we try to launch a new RecentsActivity it will not be allowed
since one activity of type "recents" is allowed to exist at the same time.

Solve this by allowing multiple root task for recents activity type.

Test: Install a 3p launcher, use that as default with a guest user and open recents
Bug: 304930756
Co-Author: Isak Lilja <Isak.Lilja@sony.com>
Change-Id: Ibacc05f7dd3ca6e835d7fea1ada87a21faea739a

parent 6786f0ff

services/core/java/com/android/server/wm/Task.java

+4 −4

Original line number	Diff line number	Diff line
		@@ -6583,11 +6583,11 @@ class Task extends TaskFragment {
		mActivityType = ACTIVITY_TYPE_STANDARD;
		}

		if (mActivityType != ACTIVITY_TYPE_STANDARD
		if (!DisplayContent.alwaysCreateRootTask(tda.getWindowingMode(), mActivityType)
		&& mActivityType != ACTIVITY_TYPE_UNDEFINED) {
		// For now there can be only one root task of a particular non-standard activity
		// type on a display. So, get that ignoring whatever windowing mode it is
		// currently in.
		// Only Recents or Standard activity types are allowed to have more than one
		// root task on a display, this is independent of whatever windowing mode it
		// is currently in.
		Task rootTask = tda.getRootTask(WINDOWING_MODE_UNDEFINED, mActivityType);
		if (rootTask != null) {
		throw new IllegalArgumentException("Root task=" + rootTask + " of activityType="