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Return the correct root task when start activity from recents

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When starting activity from recents, the system will find the
suitable task and move it to the front.  With corresponding task
display area, TDA#getOrCreateRootTask returns the candidate task
directly instead of the existing launch root task.
In RootWindowContainer#anyTaskForId, the candidate task is reparent
to the root task(same as itself) which resolve from the
TDA#getOrCreateRootTask and lead to the watchdog timeout. This CL
updates the logic to return the correct root task.

Bug: 197293995
Test: atest MultiWindowTests,WMShellUnitTests
Change-Id: Ib0b24363dc35d624c358080998c25874d9e7094c
This commit is contained in:
Jeff Chang
2021-09-10 19:06:36 +08:00
parent 61246e7f00
commit bd6bb3f503
2 changed files with 13 additions and 11 deletions
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20
services/core/java/com/android/server/wm/TaskDisplayArea.java
View File

@@ -1095,29 +1095,27 @@ final class TaskDisplayArea extends DisplayArea<WindowContainer> {
return rootTask;
}
} else if (candidateTask != null) {
final Task rootTask = candidateTask;
final int position = onTop ? POSITION_TOP : POSITION_BOTTOM;
final Task launchRootTask = getLaunchRootTask(windowingMode, activityType, options,
sourceTask, launchFlags);
if (launchRootTask != null) {
if (rootTask.getParent() == null) {
launchRootTask.addChild(rootTask, position);
} else if (rootTask.getParent() != launchRootTask) {
rootTask.reparent(launchRootTask, position);
if (candidateTask.getParent() == null) {
launchRootTask.addChild(candidateTask, position);
} else if (candidateTask.getParent() != launchRootTask) {
candidateTask.reparent(launchRootTask, position);
}
} else if (rootTask.getDisplayArea() != this || !rootTask.isRootTask()) {
if (rootTask.getParent() == null) {
addChild(rootTask, position);
} else if (candidateTask.getDisplayArea() != this || !candidateTask.isRootTask()) {
if (candidateTask.getParent() == null) {
addChild(candidateTask, position);
} else {
rootTask.reparent(this, onTop);
candidateTask.reparent(this, onTop);
}
}
// Update windowing mode if necessary, e.g. moving a pinned task to fullscreen.
if (candidateTask.getWindowingMode() != windowingMode) {
candidateTask.setWindowingMode(windowingMode);
}
return rootTask;
return candidateTask.getRootTask();
}
return new Task.Builder(mAtmService)
.setWindowingMode(windowingMode)

4
services/core/java/com/android/server/wm/WindowContainer.java
View File

@@ -354,6 +354,10 @@ class WindowContainer<E extends WindowContainer> extends ConfigurationContainer<
throw new IllegalArgumentException("reparent: can't reparent to null " + this);
}
if (newParent == this) {
throw new IllegalArgumentException("Can not reparent to itself " + this);
}
final WindowContainer oldParent = mParent;
if (mParent == newParent) {
throw new IllegalArgumentException("WC=" + this + " already child of " + mParent);