RESTRICT AUTOMERGE Create separated tasks for different apps from startActivities
Assume there are 2 applications A, B with different uids.
There are 4 activities A1, A2, B1, B2 with default task
affinity and launch mode.
After A1 called startActivities(B1, A2, B2):
Original : Task(A1, B1, A2, B2)
This Change: Task(A1, B1), Task(A2, B2)
In other words, the source caller cannot launch its activity
above the activity of other application in the same task, and
it can still launch activity of other application in its task.
Bug: 145669109
Test: run cts --test android.server.cts.StartActivityTests \
-m CtsServicesHostTestCases
Change-Id: I97bd875146a52f62b8fe82235487ccefb2955e8e
(cherry picked from commit 2be3ba49733df585bcfbf63d3b299d15dbfb0f13)
diff --git a/services/core/java/com/android/server/am/ActivityStarter.java b/services/core/java/com/android/server/am/ActivityStarter.java
index 7401fff..2baff7c 100644
--- a/services/core/java/com/android/server/am/ActivityStarter.java
+++ b/services/core/java/com/android/server/am/ActivityStarter.java
@@ -948,6 +948,8 @@
} else {
callingPid = callingUid = -1;
}
+ boolean forceNewTask = false;
+ final int filterCallingUid = callingUid >= 0 ? callingUid : realCallingUid;
final long origId = Binder.clearCallingIdentity();
try {
synchronized (mService) {
@@ -967,6 +969,9 @@
// Don't modify the client's object!
intent = new Intent(intent);
+ if (forceNewTask) {
+ intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+ }
// Collect information about the target of the Intent.
ActivityInfo aInfo = mSupervisor.resolveActivity(intent, resolvedTypes[i], 0,
@@ -992,7 +997,17 @@
return res;
}
- resultTo = outActivity[0] != null ? outActivity[0].appToken : null;
+ final ActivityRecord started = outActivity[0];
+ if (started != null && started.getUid() == filterCallingUid) {
+ // Only the started activity which has the same uid as the source caller can
+ // be the caller of next activity.
+ resultTo = started.appToken;
+ forceNewTask = false;
+ } else {
+ // Different apps not adjacent to the caller are forced to be new task.
+ resultTo = null;
+ forceNewTask = true;
+ }
}
}
} finally {
