1 前言
RootWindowContainer 是窗口容器的根容器,子容器是 DisplayContent。關於其父類及祖父類的介紹,見→WindowContainer簡介、ConfigurationContainer簡介。
本文主要介紹 WallpaperController 和 RootWindowContainer。
2 源碼
2.1 WallpaperController
(1)主要屬性
private WindowManagerService mService
private final DisplayContent mDisplayContent
private final ArrayList<WallpaperWindowToken> mWallpaperTokens = new ArrayList<>()
private WindowState mWallpaperTarget = null
private WindowState mPrevWallpaperTarget = null
private WindowState mWaitingOnWallpaper
private WindowState mTmpTopWallpaper
WindowState mDeferredHideWallpaper = null
private float mLastWallpaperX = -1
private float mLastWallpaperY = -1
private float mLastWallpaperXStep = -1
private float mLastWallpaperYStep = -1
private int mLastWallpaperDisplayOffsetX = Integer.MIN_VALUE
private int mLastWallpaperDisplayOffsetY = Integer.MIN_VALUE
private long mLastWallpaperTimeoutTime
private final FindWallpaperTargetResult mFindResults = new FindWallpaperTargetResult()
(2)
2.2 RootWindowContainer
(1)類定義
//DisplayContent 爲子節點
class RootWindowContainer extends WindowContainer<DisplayContent>
(2)主要屬性
private Object mLastWindowFreezeSource = null
private Session mHoldScreen = null
private float mScreenBrightness = -1
private long mUserActivityTimeout = -1
WindowState mHoldScreenWindow = null
WindowState mObscuringWindow = null
final WallpaperController mWallpaperController
//mHandler = new MyHandler(service.mH.getLooper())
private final Handler mHandler
//事務
private final SurfaceControl.Transaction mDisplayTransaction = new SurfaceControl.Transaction()
(3)消費者
//關閉系統對話框,w 爲 WindowState 類型
private final Consumer<WindowState> mCloseSystemDialogsConsumer = w -> {
if (w.mHasSurface) {
...
w.mClient.closeSystemDialogs(mCloseSystemDialogsReason);
...
}
};
//移除窗口,w 爲 WindowState 類型
private static final Consumer<WindowState> sRemoveReplacedWindowsConsumer = w -> {
final AppWindowToken aToken = w.mAppToken;
if (aToken != null) {
aToken.removeReplacedWindowIfNeeded(w);
}
};
Consumer 類如下。
public interface Consumer<T> {
void accept(T t);
default Consumer<T> andThen(Consumer<? super T> after) {
Objects.requireNonNull(after);
return (T t) -> { accept(t); after.accept(t); };
}
}
(4)Handler
private final class MyHandler extends Handler {
...
public void handleMessage(Message msg) {
switch (msg.what) {
//設置屏幕亮度
case SET_SCREEN_BRIGHTNESS_OVERRIDE:
mService.mPowerManagerInternal.setScreenBrightnessOverrideFromWindowManager(msg.arg1);
break;
//設置屏幕休眠時間
case SET_USER_ACTIVITY_TIMEOUT:
mService.mPowerManagerInternal.setUserActivityTimeoutOverrideFromWindowManager((Long) msg.obj);
break;
...
}
}
}
(5)Window 相關
//mChildren.get(i).findFocusedWindow()
WindowState computeFocusedWindow()
void getWindowsByName(ArrayList<WindowState> output, String name)
//mChildren.get(i).getAppWindowToken(binder)
AppWindowToken getAppWindowToken(IBinder binder)
(6)Display 相關
//displaysInFocusOrder.put(i, mChildren.get(i).getDisplayId())
void getDisplaysInFocusOrder(SparseIntArray displaysInFocusOrder)
//mChildren.get(i).getDisplayId() == displayId ? mChildren.get(i) : null
DisplayContent getDisplayContent(int displayId)
//new DisplayContent(display, mService, mWallpaperController, controller)
DisplayContent createDisplayContent(final Display display, DisplayWindowController controller)
//mChildren.get(i).getWindowToken(token.token) == token ? mChildren.get(i) : null
DisplayContent getWindowTokenDisplay(WindowToken token)
//getDisplayContent(displayId).onOverrideConfigurationChanged(newConfiguration)
int[] setDisplayOverrideConfigurationIfNeeded(Configuration newConfiguration, int displayId)
(7)Surface 相關
//mChildren.get(i).destroyLeakedSurfaces()
//mService.mActivityManager.killPids(pids, "Free memory", secure)
//winAnimator.destroySurface()
//winAnimator.mWin.mAppToken.getController().removeStartingWindow()
//winAnimator.mWin.mClient.dispatchGetNewSurface()
boolean reclaimSomeSurfaceMemory(WindowStateAnimator winAnimator, String operation, boolean secure)
void performSurfacePlacement(boolean recoveringMemory)
(8)Layout 相關
//mChildren.get(i).isLayoutNeeded()
boolean isLayoutNeeded()
//final int pendingChanges = animator.getPendingLayoutChanges(mChildren.get(i).getDisplayId())
//return pendingChanges != 0
boolean hasPendingLayoutChanges(WindowAnimator animator)
boolean copyAnimToLayoutParams()
(9)forAllWindows
//w.mWinAnimator.setSecureLocked(disabled)
void setSecureSurfaceState(int userId, boolean disabled)
//w.setHiddenWhileSuspended(suspended)
void updateHiddenWhileSuspendedState(final ArraySet<String> packages, final boolean suspended)
//w.updateAppOpsState()
void updateAppOpsState()
//forAllWindows(mCloseSystemDialogsConsumer, false
void closeSystemDialogs(String reason)
//forAllWindows(sRemoveReplacedWindowsConsumer, true)
void removeReplacedWindows()
(9)其他方法
//mChildren.get(i).getStack(windowingMode, activityType)
TaskStack getStack(int windowingMode, int activityType)
//win = getWindow((w) -> w.mSession.mPid == pid && w.isVisibleLw()), return win != null
boolean canShowStrictModeViolation(int pid)
boolean handleNotObscuredLocked(WindowState w, boolean obscured, boolean syswin)