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做一个网站前端页面多少钱,沈阳专业网站seo推广,广州公司注册费用,信阳市工程建设信息网站文章目录 序节点添加Task以DefaultTaskDisplayArea为父节点以Task为父节点 ActivityRecordWindowTokenWindowState以WindowToken为父节点以ActivityRecord为父节点 小结调用场景添加差异 流程分析添加log堆栈打印流程LauncherStatusBar 序 尚未添加窗口的层级结构树#xff0… 文章目录 序节点添加Task以DefaultTaskDisplayArea为父节点以Task为父节点 ActivityRecordWindowTokenWindowState以WindowToken为父节点以ActivityRecord为父节点 小结调用场景添加差异 流程分析添加log堆栈打印流程LauncherStatusBar 序 尚未添加窗口的层级结构树如图 DisplayArea层级结构中的每一个DisplayArea都包含着一个层级值范围这个层级值范围表明了这个DisplayArea可以容纳哪些类型的窗口。 每种窗口类型都可以通过WindowManagerPolicy.getWindowLayerFromTypeLw方法返回一个相应的层级值。 /*** Returns the layer assignment for the window type. Allows you to control how different* kinds of windows are ordered on-screen.** param type The type of window being assigned.* param canAddInternalSystemWindow If the owner window associated with the type we are* evaluating can add internal system windows. I.e they have* {link Manifest.permission#INTERNAL_SYSTEM_WINDOW}. If true, alert window* types {link android.view.WindowManager.LayoutParams#isSystemAlertWindowType(int)}* can be assigned layers greater than the layer for* {link android.view.WindowManager.LayoutParams#TYPE_APPLICATION_OVERLAY} Else, their* layers would be lesser.* return int An arbitrary integer used to order windows, with lower numbers below higher ones./default int getWindowLayerFromTypeLw(int type, boolean canAddInternalSystemWindow) {return getWindowLayerFromTypeLw(type, canAddInternalSystemWindow,false / roundedCornerOverlay /);}/** Returns the layer assignment for the window type. Allows you to control how different* kinds of windows are ordered on-screen.** param type The type of window being assigned.* param canAddInternalSystemWindow If the owner window associated with the type we are* evaluating can add internal system windows. I.e they have* {link Manifest.permission#INTERNAL_SYSTEM_WINDOW}. If true, alert window* types {link android.view.WindowManager.LayoutParams#isSystemAlertWindowType(int)}* can be assigned layers greater than the layer for* {link android.view.WindowManager.LayoutParams#TYPE_APPLICATION_OVERLAY} Else, their* layers would be lesser.* param roundedCornerOverlay {#code true} to indicate that the owner window is rounded corner* overlay.* return int An arbitrary integer used to order windows, with lower numbers below higher ones./default int getWindowLayerFromTypeLw(int type, boolean canAddInternalSystemWindow,boolean roundedCornerOverlay) {// Always put the rounded corner layer to the top most.if (roundedCornerOverlay canAddInternalSystemWindow) {return getMaxWindowLayer();}if (type FIRST_APPLICATION_WINDOW type LAST_APPLICATION_WINDOW) {return APPLICATION_LAYER;}switch (type) {case TYPE_WALLPAPER:// wallpaper is at the bottom, though the window manager may move it.return 1;case TYPE_PRESENTATION:case TYPE_PRIVATE_PRESENTATION:case TYPE_DOCK_DIVIDER:case TYPE_QS_DIALOG:case TYPE_PHONE:return 3;case TYPE_SEARCH_BAR:return 4;case TYPE_INPUT_CONSUMER:return 5;case TYPE_SYSTEM_DIALOG:return 6;case TYPE_TOAST:// toasts and the plugged-in battery thingreturn 7;case TYPE_PRIORITY_PHONE:// SIM errors and unlock. Not sure if this really should be in a high layer.return 8;case TYPE_SYSTEM_ALERT:// like the ANR / app crashed dialogs// Type is deprecated for non-system apps. For system apps, this type should be// in a higher layer than TYPE_APPLICATION_OVERLAY.return canAddInternalSystemWindow ? 12 : 9;case TYPE_APPLICATION_OVERLAY:return 11;case TYPE_INPUT_METHOD:// on-screen keyboards and other such input method user interfaces go here.return 13;case TYPE_INPUT_METHOD_DIALOG:// on-screen keyboards and other such input method user interfaces go here.return 14;case TYPE_STATUS_BAR:return 15;case TYPE_STATUS_BAR_ADDITIONAL:return 16;case TYPE_NOTIFICATION_SHADE:return 17;case TYPE_STATUS_BAR_SUB_PANEL:return 18;case TYPE_KEYGUARD_DIALOG:return 19;case TYPE_VOICE_INTERACTION_STARTING:return 20;case TYPE_VOICE_INTERACTION:// voice interaction layer should show above the lock screen.return 21;case TYPE_VOLUME_OVERLAY:// the on-screen volume indicator and controller shown when the user// changes the device volumereturn 22;case TYPE_SYSTEM_OVERLAY:// the on-screen volume indicator and controller shown when the user// changes the device volumereturn canAddInternalSystemWindow ? 23 : 10;case TYPE_NAVIGATION_BAR:// the navigation bar, if available, shows atop most thingsreturn 24;case TYPE_NAVIGATION_BAR_PANEL:// some panels (e.g. search) need to show on top of the navigation barreturn 25;case TYPE_SCREENSHOT:// screenshot selection layer shouldnt go above system error, but it should cover// navigation bars at the very least.return 26;case TYPE_SYSTEM_ERROR:// system-level error dialogsreturn canAddInternalSystemWindow ? 27 : 9;case TYPE_MAGNIFICATION_OVERLAY:// used to highlight the magnified portion of a displayreturn 28;case TYPE_DISPLAY_OVERLAY:// used to simulate secondary display devicesreturn 29;case TYPE_DRAG:// the drag layer: input for drag-and-drop is associated with this window,// which sits above all other focusable windowsreturn 30;case TYPE_ACCESSIBILITY_OVERLAY:// overlay put by accessibility services to intercept user interactionreturn 31;case TYPE_ACCESSIBILITY_MAGNIFICATION_OVERLAY:return 32;case TYPE_SECURE_SYSTEM_OVERLAY:return 33;case TYPE_BOOT_PROGRESS:return 34;case TYPE_POINTER:// the (mouse) pointer layerreturn 35;default:Slog.e(WindowManager, Unknown window type: type);return 3;}}在DisplayArea层级结构中可以直接容纳窗口的父节点有三种类型 TaskDisplayArea用于容纳App类型窗口Task的容器是TaskDisplayArea该容器也就是对应我们层级结构树中的DefaultTaskDisplayAreaActivityRecord的容器是TaskDisplayArea.Tokens用于容纳非App类型窗口WindowToken的容器是DisplayArea.Tokens该容器对应层级结构树中的Leaf节点。其中WallpaperWindowToken继承WindowToken是用来存放和Wallpaper相关的窗口ImeContainer用于容纳输入法窗口输入法的容器是ImeContainer 这里我们根据上面的代码以及adb shell dumpsys activity containers的信息简单画出如下树形图
节点添加 如何知道这些窗口是在什么时候添加的 我们需要理清各个节点的父子关系从有助于我们找到关键代码 Task 从以及adb shell dumpsys activity containers和树形图我们知道Task节点的父亲是DefaultTaskDisplayArea 当然还有一种情况是Task的父节点为Task的情况。 那么DefaultTaskDisplayArea和Task中一定有添加Task相关的方法比如addTask、addChild。 以DefaultTaskDisplayArea为父节点 我们顺着这个思路在TaskDisplayArea.java中看看有没有相关方法 代码路径frameworks/base/services/core/java/com/android/server/wm/TaskDisplayArea.java void addChild(WindowContainer child, int position) {if (child.asTaskDisplayArea() ! null) {if (DEBUG_ROOT_TASK) {Slog.d(TAG_WM, Set TaskDisplayArea child on taskDisplayArea this);}super.addChild(child, position);} else if (child.asTask() ! null) {addChildTask(child.asTask(), position);} else {throw new IllegalArgumentException(TaskDisplayArea can only add Task and TaskDisplayArea, but found child);}}private void addChildTask(Task task, int position) {if (DEBUG_ROOT_TASK) Slog.d(TAG_WM, Set task task on taskDisplayArea this);addRootTaskReferenceIfNeeded(task);position findPositionForRootTask(position, task, true / adding /);super.addChild(task, position);if (mPreferredTopFocusableRootTask ! null task.isFocusable() mPreferredTopFocusableRootTask.compareTo(task) 0) {// Clear preferred top because the adding focusable task has a higher z-order.mPreferredTopFocusableRootTask null;}mAtmService.updateSleepIfNeededLocked();onRootTaskOrderChanged(task);}我们发现在void addChild(WindowContainer child, int position)中满足条件child.asTask() ! null时就会调用addChildTask(child.asTask(), position);这也是我们添加Task的方法。可以看到里面有一个关键的调用super.addChild(task, position);也就是说实际的添加在这里 对应的是WindowContainer的void addChild(E child, int index) 代码路径frameworks/base/services/core/java/com/android/server/wm/WindowContainer.java /** Adds the input window container has a child of this container at the input index.*/CallSupervoid addChild(E child, int index) {if (!child.mReparenting child.getParent() ! null) {throw new IllegalArgumentException(addChild: container child.getName() is already a child of container child.getParent().getName() cant add to container getName() \n callers Debug.getCallers(15, \n));}if ((index 0 index ! POSITION_BOTTOM)|| (index mChildren.size() index ! POSITION_TOP)) {throw new IllegalArgumentException(addChild: invalid position index , children number mChildren.size());}if (index POSITION_TOP) {index mChildren.size();} else if (index POSITION_BOTTOM) {index 0;}mChildren.add(index, child);// Set the parent after weve actually added a child in case a subclass depends on this.child.setParent(this);} 实际上调用的我们构建层级结构树时的方法。 以Task为父节点 在Task.java中查找添加节点的相关方法 代码路径frameworks/base/services/core/java/com/android/server/wm/Task.java void addChild(WindowContainer child, final boolean toTop, boolean showForAllUsers) {Task task child.asTask();try {if (task ! null) {task.setForceShowForAllUsers(showForAllUsers);}// We only want to move the parents to the parents if we are creating this task at the// top of its root task.addChild(child, toTop ? MAX_VALUE : 0, toTop /moveParents/);} finally {if (task ! null) {task.setForceShowForAllUsers(false);}}}/*** Put a Task in this root task. Used for adding only.* When task is added to top of the root task, the entire branch of the hierarchy (including* root task and display) will be brought to top.* param child The child to add.* param position Target position to add the task to./private void addChild(WindowContainer child, int position, boolean moveParents) {// Add child task.addChild(child, null);// Move child to a proper position, as some restriction for position might apply.positionChildAt(position, child, moveParents / includingParents /);}这里的addChild(child, null);实际调用的是WindowContainer的protected void addChild(E child, ComparatorE comparator)因为其父类TaskFragment中没有符合该入参的addChild方法因此继续向上查找TaskFragment的父类WindowContainer中的addChild方法 代码路径frameworks/base/services/core/java/com/android/server/wm/WindowContainer.java /** Adds the input window container has a child of this container in order based on the input* comparator.* param child The window container to add as a child of this window container.* param comparator Comparator to use in determining the position the child should be added to.* If null, the child will be added to the top./CallSuperprotected void addChild(E child, ComparatorE comparator) {……//记录插入数组的位置若为-1则将当前child加入到后面int positionToAdd -1;if (comparator ! null) {//判断当前节点中孩子的数量//依次比较将要加入的窗口与已经存在的child的BaseLayer//mChildren越大放到数组最前面final int count mChildren.size();for (int i 0; i count; i) {//比较baseLayer如果child大于列表中已经存在的则需要返回1否则返回-1//新加入的的child大于mChildren.get(i)则返回1小于则返回-1//注comparator比较器的逻辑见上面代码的mWindowComparator if (comparator.compare(child, mChildren.get(i)) 0) {//记录当前要插入的位置positionToAdd i;break;}}}//如果新加入的窗口大于现在所有窗口if (positionToAdd -1) {//将该窗口加入到列表最后mChildren.add(child);} else {mChildren.add(positionToAdd, child);}// Set the parent after weve actually added a child in case a subclass depends on this.//此处将child的mParent设置为thischild.setParent(this);} protected void addChild(E child, ComparatorE comparator)是重载addChild和之前的void addChild(E child, int index)有所不同 ActivityRecord ActivityRecord的父节点是Task同样的在Task.java中找添加ActivityRecord的方法 代码路径frameworks/base/services/core/java/com/android/server/wm/Task.java Overridevoid addChild(WindowContainer child, int index) {index getAdjustedChildPosition(child, index);super.addChild(child, index);ProtoLog.v(WM_DEBUG_ADD_REMOVE, addChild: %s at top., this);// A rootable task that is now being added to be the child of an organized task. Making// sure the root task references is keep updated.if (mTaskOrganizer ! null mCreatedByOrganizer child.asTask() ! null) {getDisplayArea().addRootTaskReferenceIfNeeded((Task) child);}// Make sure the list of display UID allowlists is updated// now that this record is in a new task.mRootWindowContainer.updateUIDsPresentOnDisplay();// Only pass minimum dimensions for pure TaskFragment. Tasks minimum dimensions must be// passed from Task constructor.final TaskFragment childTaskFrag child.asTaskFragment();if (childTaskFrag ! null childTaskFrag.asTask() null) {childTaskFrag.setMinDimensions(mMinWidth, mMinHeight);}}super.addChild(child, index);调用的是Task父类TaskFragment的addChild方法 代码路径frameworks/base/services/core/java/com/android/server/wm/TaskFragment.java Overridevoid addChild(WindowContainer child, int index) {ActivityRecord r topRunningActivity();mClearedTaskForReuse false;mClearedTaskFragmentForPip false;final ActivityRecord addingActivity child.asActivityRecord();final boolean isAddingActivity addingActivity ! null;final Task task isAddingActivity ? getTask() : null;// If this task had any activity before we added this one.boolean taskHadActivity task ! null task.getTopMostActivity() ! null;// getActivityType() looks at the top child, so we need to read the type before adding// a new child in case the new child is on top and UNDEFINED.final int activityType task ! null ? task.getActivityType() : ACTIVITY_TYPE_UNDEFINED;super.addChild(child, index);if (isAddingActivity task ! null) {// TODO(b/207481538): temporary per-activity screenshotingif (r ! null BackNavigationController.isScreenshotEnabled()) {ProtoLog.v(WM_DEBUG_BACK_PREVIEW, Screenshotting Activity %s,r.mActivityComponent.flattenToString());Rect outBounds r.getBounds();SurfaceControl.ScreenshotHardwareBuffer backBuffer SurfaceControl.captureLayers(r.mSurfaceControl,new Rect(0, 0, outBounds.width(), outBounds.height()),1f);mBackScreenshots.put(r.mActivityComponent.flattenToString(), backBuffer);}child.asActivityRecord().inHistory true;task.onDescendantActivityAdded(taskHadActivity, activityType, addingActivity);}}super.addChild(child, index);调用TaskFragment父类方法即WindowContainer的void addChild(E child, int index) WindowToken WindowToken的父节点是叶子节点或者输入法节点叶子节点和输入法节点其实都是DisplayArea.Tokens类型。 WallpaperWindowToken继承WindowToken因此同理。 所以我们只需在DisplayArea.java的Tokens类中查找相关的添加WindowToken的方法。 代码路径frameworks/base/services/core/java/com/android/server/wm/DisplayArea.java void addChild(WindowToken token) {addChild(token, mWindowComparator);}这里的addChild(token, mWindowComparator);调用的就是WindowContainer的protected void addChild(E child, ComparatorE comparator) WindowState WindowState的父节点是WindowToken和ActivityRecord我们在WindowToken.java和中ActivityRecord.java找添加WindowState的方法 以WindowToken为父节点 代码路径frameworks/base/services/core/java/com/android/server/wm/WindowToken.java void addWindow(final WindowState win) {ProtoLog.d(WM_DEBUG_FOCUS,addWindow: win%s Callers%s, win, Debug.getCallers(5));if (win.isChildWindow()) {// Child windows are added to their parent windows.return;}// This token is created from WindowContext and the client requests to addView now, create a// surface for this token.if (mSurfaceControl null) {createSurfaceControl(true / force */);// Layers could have been assigned before the surface was created, update them againreassignLayer(getSyncTransaction());}if (!mChildren.contains(win)) {ProtoLog.v(WM_DEBUG_ADD_REMOVE, Adding %s to %s, win, this);addChild(win, mWindowComparator);mWmService.mWindowsChanged true;// TODO: Should we also be setting layout needed here and other places?}}addChild(win, mWindowComparator);调用的就是WindowContainer的protected void addChild(E child, ComparatorE comparator)添加WindowState 以ActivityRecord为父节点 代码路径frameworks/base/services/core/java/com/android/server/wm/ActivityRecord.java Overridevoid addWindow(WindowState w) {super.addWindow(w);boolean gotReplacementWindow false;for (int i mChildren.size() - 1; i 0; i–) {final WindowState candidate mChildren.get(i);gotReplacementWindow | candidate.setReplacementWindowIfNeeded(w);}// if we got a replacement window, reset the timeout to give drawing more timeif (gotReplacementWindow) {mWmService.scheduleWindowReplacementTimeouts(this);}checkKeyguardFlagsChanged();}ActivityRecord的父类是WindowToken其super.addWindow(w);调用的就是WindowToken的addWindow方法因此最终也是通过WindowContainer的protected void addChild(E child, ComparatorE comparator)添加WindowState 小结 通过前面的分析添加窗口最终都是通过WindowContainer的void addChild(E child, int index)和protected void addChild(E child, ComparatorE comparator)来添加的我们来汇总一下这两种方法的调用情况与区别 调用场景 调用void addChild(E child, int index)的情况 DefaultTaskDisplayArea添加TaskTask添加ActivityRecord 调用protected void addChild(E child, ComparatorE comparator)的情况 Task添加Task叶子节点和输入法节点Token添加WindowTokenWindowToken添加WindowStateActivityRecord添加WindowState 添加差异 WindowContainer中的void addChild(E child, int index)和protected void addChild(E child, Comparator comparator)方法区别是什么 它们之间的区别其实在于添加子容器的方式和顺序。 void addChild(E child, int index)方法 该方法通过传入的index参数指定了子容器的插入位置。index表示子容器在当前容器的子容器列表中的位置索引。调用该方法会将子容器添加到指定的位置而不会根据任何比较器进行排序。这种方式适用于需要直接指定子容器的插入位置的情况。 protected void addChild(E child, ComparatorE comparator)方法 该方法通过传入的Comparator参数定义了子容器的排序规则。调用该方法会将子容器添加到当前容器的子容器列表中并根据指定的比较器对子容器进行排序。这种方式适用于根据特定的排序规则对子容器进行动态排序的情况。 总结起来addChild(E child, int index)方法允许直接指定子容器的插入位置而addChild(E child, Comparator comparator)方法则通过比较器对子容器进行排序并添加到合适的位置。根据实际需求可以选择适合的方法来添加子容器。 流程分析 添加log 既然从上述分析中发现添加窗口最终都是通过WindowContainer的void addChild(E child, int index)和protected void addChild(E child, ComparatorE comparator)来添加的那么我们可以添加相关的log来看看其对应的流程是怎么样的 void addChild(E child, int index) {if (child instanceof Task || child instanceof ActivityRecord || child instanceof WindowToken || child instanceof WindowState) {android.util.Log.i(WindowContainer.TAG:, this addChild child child , new Exception());}……}protected void addChild(E child, ComparatorE comparator) {if (child instanceof Task || child instanceof ActivityRecord || child instanceof WindowToken || child instanceof WindowState) {android.util.Log.i(WindowContainer.TAG:, this addChild Comparator child child , new Exception());}……}堆栈打印流程 这里我们以Launcher和StatusBar为例 Launcher WindowContainer.TAG : DefaultTaskDisplayArea243571827 addChild child Task{a13d730 #1 typehome ?? U0 visiblefalse visibleRequestedfalse modeundefined translucenttrue sz0} WindowContainer.TAG : java.lang.Exception WindowContainer.TAG : at com.android.server.wm.WindowContainer.addChild(WindowContainer.java:727) WindowContainer.TAG : at com.android.server.wm.TaskDisplayArea.addChildTask(TaskDisplayArea.java:334) WindowContainer.TAG : at com.android.server.wm.TaskDisplayArea.addChild(TaskDisplayArea.java:320) WindowContainer.TAG : at com.android.server.wm.Task\(Builder.build(Task.java:6551) WindowContainer.TAG : at com.android.server.wm.TaskDisplayArea.createRootTask(TaskDisplayArea.java:1066) WindowContainer.TAG : at com.android.server.wm.TaskDisplayArea.createRootTask(TaskDisplayArea.java:1040) WindowContainer.TAG : at com.android.server.wm.TaskDisplayArea.getOrCreateRootHomeTask(TaskDisplayArea.java:1640) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer.setWindowManager(RootWindowContainer.java:1321) WindowContainer.TAG : at com.android.server.wm.ActivityTaskManagerService.setWindowManager(ActivityTaskManagerService.java:1006) WindowContainer.TAG : at com.android.server.am.ActivityManagerService.setWindowManager(ActivityManagerService.java:1923) WindowContainer.TAG : at com.android.server.SystemServer.startOtherServices(SystemServer.java:1595) WindowContainer.TAG : at com.android.server.SystemServer.run(SystemServer.java:939) WindowContainer.TAG : at com.android.server.SystemServer.main(SystemServer.java:649) WindowContainer.TAG : at java.lang.reflect.Method.invoke(Native Method) WindowContainer.TAG : at com.android.internal.os.RuntimeInit\)MethodAndArgsCaller.run(RuntimeInit.java:548) WindowContainer.TAG : at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:914) WindowContainer.TAG : Task{a13d730 #1 typehome ?? U0 visibletrue visibleRequestedfalse modefullscreen translucenttrue sz0} addChild Comparator child Task{63f31d4 #2 typeundefined A1000:com.android.settings.FallbackHome U0 visiblefalse visibleRequestedfalse modeundefined translucenttrue sz0} WindowContainer.TAG : java.lang.Exception WindowContainer.TAG : at com.android.server.wm.WindowContainer.addChild(WindowContainer.java:694) WindowContainer.TAG : at com.android.server.wm.Task.addChild(Task.java:5935) WindowContainer.TAG : at com.android.server.wm.Task.-$\(Nest\)maddChild(Unknown Source:0) WindowContainer.TAG : at com.android.server.wm.Task\(Builder.build(Task.java:6548) WindowContainer.TAG : at com.android.server.wm.Task.reuseOrCreateTask(Task.java:5819) WindowContainer.TAG : at com.android.server.wm.ActivityStarter.setNewTask(ActivityStarter.java:2872) WindowContainer.TAG : at com.android.server.wm.ActivityStarter.startActivityInner(ActivityStarter.java:1864) WindowContainer.TAG : at com.android.server.wm.ActivityStarter.startActivityUnchecked(ActivityStarter.java:1661) WindowContainer.TAG : at com.android.server.wm.ActivityStarter.executeRequest(ActivityStarter.java:1216) WindowContainer.TAG : at com.android.server.wm.ActivityStarter.execute(ActivityStarter.java:702) WindowContainer.TAG : at com.android.server.wm.ActivityStartController.startHomeActivity(ActivityStartController.java:179) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer.startHomeOnTaskDisplayArea(RootWindowContainer.java:1493) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer.lambda\)startHomeOnDisplay\(12\)com-android-server-wm-RootWindowContainer(RootWindowContainer.java:1434) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer$\(ExternalSyntheticLambda7.apply(Unknown Source:16) WindowContainer.TAG : at com.android.server.wm.TaskDisplayArea.reduceOnAllTaskDisplayAreas(TaskDisplayArea.java:513) WindowContainer.TAG : at com.android.server.wm.DisplayArea.reduceOnAllTaskDisplayAreas(DisplayArea.java:404) WindowContainer.TAG : at com.android.server.wm.DisplayArea.reduceOnAllTaskDisplayAreas(DisplayArea.java:404) WindowContainer.TAG : at com.android.server.wm.DisplayArea.reduceOnAllTaskDisplayAreas(DisplayArea.java:404) WindowContainer.TAG : at com.android.server.wm.DisplayArea.reduceOnAllTaskDisplayAreas(DisplayArea.java:404) WindowContainer.TAG : at com.android.server.wm.DisplayArea.reduceOnAllTaskDisplayAreas(DisplayArea.java:404) WindowContainer.TAG : at com.android.server.wm.WindowContainer.reduceOnAllTaskDisplayAreas(WindowContainer.java:2283) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer.startHomeOnDisplay(RootWindowContainer.java:1433) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer.startHomeOnDisplay(RootWindowContainer.java:1420) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer.startHomeOnAllDisplays(RootWindowContainer.java:1405) WindowContainer.TAG : at com.android.server.wm.ActivityTaskManagerService\)LocalService.startHomeOnAllDisplays(ActivityTaskManagerService.java:5892) WindowContainer.TAG : at com.android.server.am.ActivityManagerService.systemReady(ActivityManagerService.java:8203) WindowContainer.TAG : at com.android.server.SystemServer.startOtherServices(SystemServer.java:2801) WindowContainer.TAG : at com.android.server.SystemServer.run(SystemServer.java:939) WindowContainer.TAG : at com.android.server.SystemServer.main(SystemServer.java:649) WindowContainer.TAG : at java.lang.reflect.Method.invoke(Native Method) WindowContainer.TAG : at com.android.internal.os.RuntimeInit\(MethodAndArgsCaller.run(RuntimeInit.java:548) WindowContainer.TAG : at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:914) WindowContainer.TAG : Task{63f31d4 #2 typeundefined A1000:com.android.settings.FallbackHome U0 rootTaskId1 visibletrue visibleRequestedfalse modefullscreen translucenttrue sz0} addChild child ActivityRecord{983a135 u0 com.android.settings/.FallbackHome} WindowContainer.TAG : java.lang.Exception WindowContainer.TAG : at com.android.server.wm.WindowContainer.addChild(WindowContainer.java:727) WindowContainer.TAG : at com.android.server.wm.TaskFragment.addChild(TaskFragment.java:1835) WindowContainer.TAG : at com.android.server.wm.Task.addChild(Task.java:1429) WindowContainer.TAG : at com.android.server.wm.ActivityStarter.addOrReparentStartingActivity(ActivityStarter.java:2927) WindowContainer.TAG : at com.android.server.wm.ActivityStarter.setNewTask(ActivityStarter.java:2877) WindowContainer.TAG : at com.android.server.wm.ActivityStarter.startActivityInner(ActivityStarter.java:1864) WindowContainer.TAG : at com.android.server.wm.ActivityStarter.startActivityUnchecked(ActivityStarter.java:1661) WindowContainer.TAG : at com.android.server.wm.ActivityStarter.executeRequest(ActivityStarter.java:1216) WindowContainer.TAG : at com.android.server.wm.ActivityStarter.execute(ActivityStarter.java:702) WindowContainer.TAG : at com.android.server.wm.ActivityStartController.startHomeActivity(ActivityStartController.java:179) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer.startHomeOnTaskDisplayArea(RootWindowContainer.java:1493) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer.lambda\)startHomeOnDisplay\(12\)com-android-server-wm-RootWindowContainer(RootWindowContainer.java:1434) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer$\(ExternalSyntheticLambda7.apply(Unknown Source:16) WindowContainer.TAG : at com.android.server.wm.TaskDisplayArea.reduceOnAllTaskDisplayAreas(TaskDisplayArea.java:513) WindowContainer.TAG : at com.android.server.wm.DisplayArea.reduceOnAllTaskDisplayAreas(DisplayArea.java:404) WindowContainer.TAG : at com.android.server.wm.DisplayArea.reduceOnAllTaskDisplayAreas(DisplayArea.java:404) WindowContainer.TAG : at com.android.server.wm.DisplayArea.reduceOnAllTaskDisplayAreas(DisplayArea.java:404) WindowContainer.TAG : at com.android.server.wm.DisplayArea.reduceOnAllTaskDisplayAreas(DisplayArea.java:404) WindowContainer.TAG : at com.android.server.wm.DisplayArea.reduceOnAllTaskDisplayAreas(DisplayArea.java:404) WindowContainer.TAG : at com.android.server.wm.WindowContainer.reduceOnAllTaskDisplayAreas(WindowContainer.java:2283) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer.startHomeOnDisplay(RootWindowContainer.java:1433) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer.startHomeOnDisplay(RootWindowContainer.java:1420) WindowContainer.TAG : at com.android.server.wm.RootWindowContainer.startHomeOnAllDisplays(RootWindowContainer.java:1405) WindowContainer.TAG : at com.android.server.wm.ActivityTaskManagerService\)LocalService.startHomeOnAllDisplays(ActivityTaskManagerService.java:5892) WindowContainer.TAG : at com.android.server.am.ActivityManagerService.systemReady(ActivityManagerService.java:8203) WindowContainer.TAG : at com.android.server.SystemServer.startOtherServices(SystemServer.java:2801) WindowContainer.TAG : at com.android.server.SystemServer.run(SystemServer.java:939) WindowContainer.TAG : at com.android.server.SystemServer.main(SystemServer.java:649) WindowContainer.TAG : at java.lang.reflect.Method.invoke(Native Method) WindowContainer.TAG : at com.android.internal.os.RuntimeInit\(MethodAndArgsCaller.run(RuntimeInit.java:548) WindowContainer.TAG : at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:914) WindowContainer.TAG : ActivityRecord{983a135 u0 com.android.settings/.FallbackHome} t2} addChild Comparator child Window{ae9b359 u0 com.android.settings/com.android.settings.FallbackHome} WindowContainer.TAG : java.lang.Exception WindowContainer.TAG : at com.android.server.wm.WindowContainer.addChild(WindowContainer.java:694) WindowContainer.TAG : at com.android.server.wm.WindowToken.addWindow(WindowToken.java:302) WindowContainer.TAG : at com.android.server.wm.ActivityRecord.addWindow(ActivityRecord.java:4212) WindowContainer.TAG : at com.android.server.wm.WindowManagerService.addWindow(WindowManagerService.java:1773) WindowContainer.TAG : at com.android.server.wm.Session.addToDisplayAsUser(Session.java:209) WindowContainer.TAG : at android.view.IWindowSession\)Stub.onTransact(IWindowSession.java:652) WindowContainer.TAG : at com.android.server.wm.Session.onTransact(Session.java:175) WindowContainer.TAG : at android.os.Binder.execTransactInternal(Binder.java:1280) WindowContainer.TAG : at android.os.Binder.execTransact(Binder.java:1244)home task直接被TaskDisplayArea持有为孩子这里可以明显看出Task{a13d730 #1 typehome 是在第一次创建WMS就已经创建好了通过的是TaskDisplayArea.getOrCreateRootHomeTask开始一直到com.android.server.wm.WindowContainer.addChild 之后home task加入一个具体Launcher的task这里最开始当然是我们的FallbackHome。 具体堆栈可以看出是ActivityManagerService.systemReady时候触发了ActivityTaskManagerService\(LocalService.startHomeOnAllDisplays然后把HomeActivity拉起由于此时还是加密状态所以获取的的Home当然是setting的fallbackhome 最后ActivityRecord添加WindowState就是通过跨进程通信addWindow。 StatusBar WindowContainer.TAG : Leaf:15:1565133355 addChild Comparator child WindowToken{ea411e9 type2000 android.os.BinderProxy46a0296} WindowContainer.TAG : java.lang.Exception WindowContainer.TAG : at com.android.server.wm.WindowContainer.addChild(WindowContainer.java:694) WindowContainer.TAG : at com.android.server.wm.DisplayArea\)Tokens.addChild(DisplayArea.java:605) WindowContainer.TAG : at com.android.server.wm.DisplayContent.addWindowToken(DisplayContent.java:1235) WindowContainer.TAG : at com.android.server.wm.WindowToken.init(WindowToken.java:214) WindowContainer.TAG : at com.android.server.wm.WindowToken\(Builder.build(WindowToken.java:817) WindowContainer.TAG : at com.android.server.wm.WindowManagerService.addWindow(WindowManagerService.java:1577) WindowContainer.TAG : at com.android.server.wm.Session.addToDisplayAsUser(Session.java:209) WindowContainer.TAG : at android.view.IWindowSession\)Stub.onTransact(IWindowSession.java:652) WindowContainer.TAG : at com.android.server.wm.Session.onTransact(Session.java:175) WindowContainer.TAG : at android.os.Binder.execTransactInternal(Binder.java:1280) WindowContainer.TAG : at android.os.Binder.execTransact(Binder.java:1244) WindowContainer.TAG : WindowToken{ea411e9 type2000 android.os.BinderProxy46a0296} addChild Comparator child Window{c86ce6e u0 StatusBar} WindowContainer.TAG : java.lang.Exception WindowContainer.TAG : at com.android.server.wm.WindowContainer.addChild(WindowContainer.java:694) WindowContainer.TAG : at com.android.server.wm.WindowToken.addWindow(WindowToken.java:302) WindowContainer.TAG : at com.android.server.wm.WindowManagerService.addWindow(WindowManagerService.java:1773) WindowContainer.TAG : at com.android.server.wm.Session.addToDisplayAsUser(Session.java:209) WindowContainer.TAG : at android.view.IWindowSession$Stub.onTransact(IWindowSession.java:652) WindowContainer.TAG : at com.android.server.wm.Session.onTransact(Session.java:175) WindowContainer.TAG : at android.os.Binder.execTransactInternal(Binder.java:1280) WindowContainer.TAG : at android.os.Binder.execTransact(Binder.java:1244)WindowToken和WindowState都是通过跨进程通信Session.addToDisplayAsUser来调用。 WindowToken的堆栈中WindowContainer.TAG : at com.android.server.wm.WindowManagerService.addWindow(WindowManagerService.java:1577)在1577行开始添加WindowToken而WindowState的堆栈中WindowContainer.TAG : at com.android.server.wm.WindowManagerService.addWindow(WindowManagerService.java:1773)1773行开始添加WindowState正好是在添加WindowToken之后。 具体流程可参考Android T WMS窗口相关流程