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Prevent potential NPE when updating state to bar manager

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If the process of bar window is died, the associated window
will be set to null. Since BarController is associated with
display, the display id can be a final field, so it no longer
depends on the nullable member mWin.

Fixes: 129240719
Test: manual - Play video in landscape mode and make systemui
      crash, e.g. adb shell kill -11 ${pid of systemui}. The
      result should be only the systemui is restarted.

Change-Id: If5b93e76cb856dd0dd80fb8523788f4587222c9c
This commit is contained in:
Riddle Hsu
2019-03-26 00:40:35 +08:00
parent b9b310a976
commit d80ae9b5ec
3 changed files with 27 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
services/core/java/com/android/server/wm/BarController.java
View File

@@ -51,6 +51,7 @@ public class BarController {
private static final int MSG_NAV_BAR_VISIBILITY_CHANGED = 1;
protected final String mTag;
protected final int mDisplayId;
private final int mTransientFlag;
private final int mUnhideFlag;
private final int mTranslucentFlag;
@@ -74,9 +75,10 @@ public class BarController {
private OnBarVisibilityChangedListener mVisibilityChangeListener;
BarController(String tag, int transientFlag, int unhideFlag, int translucentFlag,
BarController(String tag, int displayId, int transientFlag, int unhideFlag, int translucentFlag,
int statusBarManagerId, int translucentWmFlag, int transparentFlag) {
mTag = "BarController." + tag;
mDisplayId = displayId;
mTransientFlag = transientFlag;
mUnhideFlag = unhideFlag;
mTranslucentFlag = translucentFlag;
@@ -230,7 +232,7 @@ public class BarController {
public void run() {
StatusBarManagerInternal statusbar = getStatusBarInternal();
if (statusbar != null) {
statusbar.setWindowState(mWin.getDisplayId(), mStatusBarManagerId, state);
statusbar.setWindowState(mDisplayId, mStatusBarManagerId, state);
}
}
});

22
services/core/java/com/android/server/wm/DisplayPolicy.java
View File

@@ -261,15 +261,9 @@ public class DisplayPolicy {
/** Cached value of {@link ScreenShapeHelper#getWindowOutsetBottomPx} */
@Px private int mWindowOutsetBottom;
private final StatusBarController mStatusBarController = new StatusBarController();
private final StatusBarController mStatusBarController;
private final BarController mNavigationBarController = new BarController("NavigationBar",
View.NAVIGATION_BAR_TRANSIENT,
View.NAVIGATION_BAR_UNHIDE,
View.NAVIGATION_BAR_TRANSLUCENT,
StatusBarManager.WINDOW_NAVIGATION_BAR,
FLAG_TRANSLUCENT_NAVIGATION,
View.NAVIGATION_BAR_TRANSPARENT);
private final BarController mNavigationBarController;
private final BarController.OnBarVisibilityChangedListener mNavBarVisibilityListener =
new BarController.OnBarVisibilityChangedListener() {
@@ -416,6 +410,17 @@ public class DisplayPolicy {
mDisplayContent = displayContent;
mLock = service.getWindowManagerLock();
final int displayId = displayContent.getDisplayId();
mStatusBarController = new StatusBarController(displayId);
mNavigationBarController = new BarController("NavigationBar",
displayId,
View.NAVIGATION_BAR_TRANSIENT,
View.NAVIGATION_BAR_UNHIDE,
View.NAVIGATION_BAR_TRANSLUCENT,
StatusBarManager.WINDOW_NAVIGATION_BAR,
FLAG_TRANSLUCENT_NAVIGATION,
View.NAVIGATION_BAR_TRANSPARENT);
final Resources r = mContext.getResources();
mCarDockEnablesAccelerometer = r.getBoolean(R.bool.config_carDockEnablesAccelerometer);
mDeskDockEnablesAccelerometer = r.getBoolean(R.bool.config_deskDockEnablesAccelerometer);
@@ -527,7 +532,6 @@ public class DisplayPolicy {
if (mWindowSleepToken != null) {
return;
}
final int displayId = displayContent.getDisplayId();
mWindowSleepToken = service.mAtmInternal.acquireSleepToken(
"WindowSleepTokenOnDisplay" + displayId, displayId);
};

19
services/core/java/com/android/server/wm/StatusBarController.java
View File

@@ -36,22 +36,22 @@ public class StatusBarController extends BarController {
private Runnable mAppTransitionPending = () -> {
StatusBarManagerInternal statusBar = getStatusBarInternal();
if (statusBar != null && mWin != null) {
statusBar.appTransitionPending(mWin.getDisplayId());
if (statusBar != null) {
statusBar.appTransitionPending(mDisplayId);
}
};
private Runnable mAppTransitionCancelled = () -> {
StatusBarManagerInternal statusBar = getStatusBarInternal();
if (statusBar != null && mWin != null) {
statusBar.appTransitionCancelled(mWin.getDisplayId());
if (statusBar != null) {
statusBar.appTransitionCancelled(mDisplayId);
}
};
private Runnable mAppTransitionFinished = () -> {
StatusBarManagerInternal statusBar = getStatusBarInternal();
if (statusBar != null && mWin != null) {
statusBar.appTransitionFinished(mWin.getDisplayId());
if (statusBar != null) {
statusBar.appTransitionFinished(mDisplayId);
}
};
@@ -65,8 +65,8 @@ public class StatusBarController extends BarController {
long statusBarAnimationStartTime, long statusBarAnimationDuration) {
mHandler.post(() -> {
StatusBarManagerInternal statusBar = getStatusBarInternal();
if (statusBar != null && mWin != null) {
statusBar.appTransitionStarting(mWin.getDisplayId(),
if (statusBar != null) {
statusBar.appTransitionStarting(mDisplayId,
statusBarAnimationStartTime, statusBarAnimationDuration);
}
});
@@ -84,8 +84,9 @@ public class StatusBarController extends BarController {
}
};
StatusBarController() {
StatusBarController(int displayId) {
super("StatusBar",
displayId,
View.STATUS_BAR_TRANSIENT,
View.STATUS_BAR_UNHIDE,
View.STATUS_BAR_TRANSLUCENT,