Address issues surrounding freezing by display.
The first issue is the animating a display as a consequence of the
freezing due to configuration change during construction. This
additional animation is not expected and interferes with tests
expecting for the original display contents to be shown intact. This
CL addresses the issue by not freezing while the display is not ready
(before construction is finished).
The second problem addressed is book-keeping for
DisplayContentsAnimators in WindowAnimator. Currently, a getter
method is used internally to reference these animators, which
generates them if not present and adds them to the animation
iteration. In the case we set an animation on a display that no
longer exists (which can be the case after unfreezing), we end up
recreating this object. This can lead to us trying to animate a
non-existent DisplayContent. This CL prevents creating an animator
for a non-existent display and adjusts the methods using this getter
to handle this case.
Fixes: 62460846
Fixes: 62461229
Bug: 35486733
Bug: 62541591
Test: go/wm-smoke
Test: open and close projected android auto mode repeatedly and
ensure display correctness
Test: cts-tradefed run singleCommand cts-dev --module CtsMediaTestCases --test android.media.cts.EncodeVirtualDisplayTest#testEncodeVirtualDisplay
Change-Id: I60ade6f97440c8fa01b10e36c019865cf1fd0730
diff --git a/services/core/java/com/android/server/wm/DisplayContent.java b/services/core/java/com/android/server/wm/DisplayContent.java
index ccc8f63..54983c8 100644
--- a/services/core/java/com/android/server/wm/DisplayContent.java
+++ b/services/core/java/com/android/server/wm/DisplayContent.java
@@ -314,6 +314,9 @@
// the display's direct children should be allowed.
private boolean mRemovingDisplay = false;
+ // {@code false} if this display is in the processing of being created.
+ private boolean mDisplayReady = false;
+
private final WindowLayersController mLayersController;
WallpaperController mWallpaperController;
int mInputMethodAnimLayerAdjustment;
@@ -720,7 +723,6 @@
*/
DisplayContent(Display display, WindowManagerService service,
WindowLayersController layersController, WallpaperController wallpaperController) {
-
if (service.mRoot.getDisplayContent(display.getDisplayId()) != null) {
throw new IllegalArgumentException("Display with ID=" + display.getDisplayId()
+ " already exists=" + service.mRoot.getDisplayContent(display.getDisplayId())
@@ -748,6 +750,15 @@
// Add itself as a child to the root container.
mService.mRoot.addChild(this, null);
+
+ // TODO(b/62541591): evaluate whether this is the best spot to declare the
+ // {@link DisplayContent} ready for use.
+ mDisplayReady = true;
+ }
+
+ boolean isReady() {
+ // The display is ready when the system and the individual display are both ready.
+ return mService.mDisplayReady && mDisplayReady;
}
int getDisplayId() {
diff --git a/services/core/java/com/android/server/wm/WindowAnimator.java b/services/core/java/com/android/server/wm/WindowAnimator.java
index 03b5b827..aabf2be 100644
--- a/services/core/java/com/android/server/wm/WindowAnimator.java
+++ b/services/core/java/com/android/server/wm/WindowAnimator.java
@@ -108,7 +108,8 @@
}
void addDisplayLocked(final int displayId) {
- // Create the DisplayContentsAnimator object by retrieving it.
+ // Create the DisplayContentsAnimator object by retrieving it if the associated
+ // {@link DisplayContent} exists.
getDisplayContentsAnimatorLocked(displayId);
if (displayId == DEFAULT_DISPLAY) {
mInitialized = true;
@@ -356,8 +357,16 @@
}
private DisplayContentsAnimator getDisplayContentsAnimatorLocked(int displayId) {
+ if (displayId < 0) {
+ return null;
+ }
+
DisplayContentsAnimator displayAnimator = mDisplayContentsAnimators.get(displayId);
- if (displayAnimator == null) {
+
+ // It is possible that this underlying {@link DisplayContent} has been removed. In this
+ // case, we do not want to create an animator associated with it as {link #animate} will
+ // fail.
+ if (displayAnimator == null && mService.mRoot.getDisplayContent(displayId) != null) {
displayAnimator = new DisplayContentsAnimator();
mDisplayContentsAnimators.put(displayId, displayAnimator);
}
@@ -365,8 +374,10 @@
}
void setScreenRotationAnimationLocked(int displayId, ScreenRotationAnimation animation) {
- if (displayId >= 0) {
- getDisplayContentsAnimatorLocked(displayId).mScreenRotationAnimation = animation;
+ final DisplayContentsAnimator animator = getDisplayContentsAnimatorLocked(displayId);
+
+ if (animator != null) {
+ animator.mScreenRotationAnimation = animation;
}
}
@@ -374,7 +385,9 @@
if (displayId < 0) {
return null;
}
- return getDisplayContentsAnimatorLocked(displayId).mScreenRotationAnimation;
+
+ DisplayContentsAnimator animator = getDisplayContentsAnimatorLocked(displayId);
+ return animator != null? animator.mScreenRotationAnimation : null;
}
void requestRemovalOfReplacedWindows(WindowState win) {
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index 768b03a..b296529 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -5886,8 +5886,8 @@
return;
}
- if (!mDisplayReady || !mPolicy.isScreenOn()) {
- // No need to freeze the screen before the system is ready or if
+ if (!displayContent.isReady() || !mPolicy.isScreenOn()) {
+ // No need to freeze the screen before the display is ready, system is ready, or if
// the screen is off.
return;
}