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【framework】TaskStack简介_taskstacklistener

作者：很楠不爱3 | 2024-03-16 06:09:54

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taskstacklistener

1 前言

        TaskStack 用于管理 app，一般一个应用程序对应一个 TaskStack，其父容器为 TaskStackContainers（DisplayContent 的子容器），子容器为 Task。

        关于其父类及祖父类的介绍，见 → WindowContainer简介、ConfigurationContainer简介。

2 源码

        源码地址→/frameworks/base/services/core/java/com/android/server/wm/TaskStack.java

        （1）类定义

  1. //Task 为子节点类型
  2. public class TaskStack extends WindowContainer<Task> implements BoundsAnimationTarget, ConfigurationContainerListener

        （2）主要属性

  1. final int mStackId
  2.  
  3. private final Rect mAdjustedBounds = new Rect()
  4.  
  5. private final Rect mFullyAdjustedImeBounds = new Rect()
  6.  
  7. private SurfaceControl mAnimationBackgroundSurface
  8.  
  9. private WindowStateAnimator mAnimationBackgroundAnimator
  10.  
  11. final AppTokenList mExitingAppTokens = new AppTokenList()
  12.  
  13. private WindowState mImeWin
  14.  
  15. private Rect mBoundsAnimationTarget = new Rect()
  16.  
  17. private Rect mBoundsAnimationSourceHintBounds = new Rect()
  18.  
  19. ActivityStack mActivityStack
  20.  
  21. private final Point mLastSurfaceSize = new Point()

        （3）构造方法

  1. TaskStack(WindowManagerService service, int stackId, ActivityStack activityStack) {
  2. 	super(service);
  3. 	mStackId = stackId;
  4. 	mActivityStack = activityStack;
  5. 	activityStack.registerConfigurationChangeListener(this);
  6. 	...
  7. }

        （4）Task 相关

  1. //mChildren.get(mChildren.size() - 1)
  2. Task findHomeTask()
  3.  
  4. //addTask(task, position, task.showForAllUsers(), true)
  5. void addTask(Task task, int position)
  6.  
  7. //positionChildAt(position, task, moveParents, showForAllUsers)
  8. void addTask(Task task, int position, boolean showForAllUsers, boolean moveParents)
  9.  
  10. //mExitingAppTokens.get(i).getTask() == task ? mExitingAppTokens.remove(i)
  11. void removeChild(Task task)
  12.  
  13. //removeImmediately()
  14. void removeIfPossible()
  15.  
  16. //super.removeImmediately()
  17. void removeImmediately()
  18.  
  19. //child.positionAt(position)
  20. void positionChildAt(Task child, int position)
  21.  
  22. //positionChildAt(POSITION_TOP, child, includingParents)
  23. void positionChildAtTop(Task child, boolean includingParents)
  24.  
  25. //positionChildAt(POSITION_BOTTOM, child, includingParents)
  26. void positionChildAtBottom(Task child, boolean includingParents)
  27.  
  28. //positionChildAt(position, child, includingParents, child.showForAllUsers())
  29. void positionChildAt(int position, Task child, boolean includingParents)
  30.  
  31. //mChildren.get(i).mUserId == userId ? true : false
  32. boolean hasTaskForUser(int userId)
  33.  
  34. //mChildren.get(i).prepareFreezingBounds()
  35. void prepareFreezingTaskBounds()

        （5）Stack 相关 

  1. //inPinnedWindowingMode() ? (int)Math.ceil(mWmService.dipToPixel(PINNED_WINDOWING_MODE_ELEVATION_IN_DIP, displayMetrics) * 2) : 0
  2. int getStackOutset()
  3.  
  4. //return displayContentRect.top + (int)((originalStackBottom - displayContentRect.top) * ADJUSTED_STACK_FRACTION_MIN)
  5. int getMinTopStackBottom(final Rect displayContentRect, int originalStackBottom)

        （6）Bounds 相关

  1. //super.setBounds(bounds)
  2. public int setBounds(Rect bounds)
  3.  
  4. //out.set(super.getBounds())
  5. void getRawBounds(Rect out)
  6.  
  7. //super.getBounds()
  8. Rect getRawBounds()
  9.  
  10. //bounds.set(super.getBounds())
  11. public void getBounds(Rect bounds)
  12.  
  13. //super.getBounds()
  14. public Rect getBounds()
  15.  
  16. //outBounds.set(mBoundsAnimationTarget)
  17. void getFinalAnimationBounds(Rect outBounds)
  18.  
  19. //outBounds.set(mBoundsAnimationSourceHintBounds)
  20. void getFinalAnimationSourceHintBounds(Rect outBounds)
  21.  
  22. //getBounds(outBounds)
  23. void getAnimationOrCurrentBounds(Rect outBounds)
  24.  
  25. //matchParentBounds()
  26. boolean fillsParent()
  27.  
  28. //获取包含指定坐标的 task
  29. void findTaskForResizePoint(int x, int y, int delta, DisplayContent.TaskForResizePointSearchResult results)
  30.  
  31. //设置不可触摸区域
  32. void setTouchExcludeRegion(Task focusedTask, int delta, Region touchExcludeRegion, Rect contentRect, Rect postExclude)

        （7）Display 相关

  1. //final DisplayContent targetDc = mWmService.mRoot.getDisplayContent(displayId)
  2. //targetDc.moveStackToDisplay(this, onTop)
  3. void reparent(int displayId, Rect outStackBounds, boolean onTop)
  4.  
  5. //final int outset = getStackOutset();
  6. //outPos.x -= outset; outPos.y -= outset
  7. void getRelativeDisplayedPosition(Point outPos)
  8.  
  9. //super.onDisplayChanged(dc)
  10. void onDisplayChanged(DisplayContent dc)
  11.  
  12. //return mDisplayContent.getDisplayInfo()
  13. public DisplayInfo getDisplayInfo()
  14.  
  15. //return mDisplayContent != null
  16. public boolean isAttached()

        （8）Surface 相关

  1. //mLastSurfaceSize
  2. Point getLastSurfaceSize()
  3.  
  4. //super.prepareSurfaces()
  5. void prepareSurfaces()

        （9）动画相关

  1. //hideAnimationSurface()
  2. void resetAnimationBackgroundAnimator()
  3.  
  4. //mAnimationBackgroundAnimator = winAnimator
  5. void setAnimationBackground(WindowStateAnimator winAnimator, int color)
  6.  
  7. //mChildren.get(i).isTaskAnimating()
  8. boolean isTaskAnimating()
  9.  
  10. public void onPipAnimationEndResize()
  11.  
  12. //return mBoundsAnimating
  13. public boolean isForceScaled()
  14.  
  15. //return mBoundsAnimating
  16. public boolean isAnimatingBounds()
  17.  
  18. //return mBoundsAnimatingToFullscreen
  19. public boolean lastAnimatingBoundsWasToFullscreen()
  20.  
  21. //return isAnimatingBounds() && lastAnimatingBoundsWasToFullscreen()
  22. public boolean isAnimatingBoundsToFullscreen()
  23.  
  24. public boolean onAnimationStart(boolean schedulePipModeChangedCallback, boolean forceUpdate, int animationType)
  25.  
  26. public void onAnimationEnd(boolean schedulePipModeChangedCallback, Rect finalStackSize, boolean moveToFullscreen)
  27.  
  28. //return mAnimatingAppWindowTokenRegistry
  29. AnimatingAppWindowTokenRegistry getAnimatingAppWindowTokenRegistry()

        （10）Dock 相关

  1. //DockedDividerUtils.calculateBoundsForPosition(target.position, dockSide, outBounds, displayWidth, displayHeight, dividerSize)
  2. void snapDockedStackAfterRotation(Configuration parentConfig, DisplayCutout displayCutout, Rect outBounds)
  3.  
  4. //getStackDockedModeBounds(parentConfig, false, outStackBounds, dockedBounds, mDisplayContent.mDividerControllerLocked.getContentWidth(), dockedOnTopOrLeft)
  5. void getStackDockedModeBoundsLocked(Configuration parentConfig, Rect dockedBounds, Rect currentTempTaskBounds, Rect outStackBounds, Rect outTempTaskBounds)
  6.  
  7. //getStackDockedModeBoundsLocked(mDisplayContent.getConfiguration(), dockedBounds, null, bounds, tempBounds)
  8. void resetDockedStackToMiddle()
  9.  
  10. //getDockSide(mDisplayContent.getConfiguration(), getRawBounds())
  11. int getDockSide()
  12.  
  13. //getDockSide(dc, dc.getConfiguration(), getRawBounds())
  14. int getDockSideForDisplay(DisplayContent dc)
  15.  
  16. //getDockSide(mDisplayContent, parentConfig, bounds)
  17. int getDockSide(Configuration parentConfig, Rect bounds)
  18.  
  19. //return mMinimizeAmount != 0f
  20. boolean isAdjustedForMinimizedDockedStack()
  21.  
  22. //mMinimizeAmount = minimizeAmount
  23. //updateAdjustedBounds()
  24. boolean setAdjustedForMinimizedDock(float minimizeAmount)
  25.  
  26. //repositionSplitScreenStackAfterRotation(parentConfig, primary, inOutBounds)
  27. //snapDockedStackAfterRotation(parentConfig, cutout, inOutBounds)
  28. void calculateDockedBoundsForConfigChange(Configuration parentConfig, Rect inOutBounds)

        （11）输入法相关

  1. //updateAdjustForIme(adjustImeAmount, adjustDividerAmount, true)
  2. void setAdjustedForIme(WindowState imeWin, boolean keepLastAmount)
  3.  
  4. //mAdjustImeAmount = adjustAmount; mAdjustDividerAmount = adjustDividerAmount;
  5. //updateAdjustedBounds()
  6. boolean updateAdjustForIme(float adjustAmount, float adjustDividerAmount, boolean force)
  7.  
  8. //mAdjustedForIme
  9. boolean isAdjustedForIme()
  10.  
  11. //return mImeWin != null && mImeWin.isAnimatingLw()
  12. boolean isAnimatingForIme()
  13.  
  14. //mImeWin = null; mImeGoingAway = false; mAdjustImeAmount = 0f; mAdjustDividerAmount = 0f
  15. //updateAdjustedBounds()
  16. void resetAdjustedForIme(boolean adjustBoundsNow)
  17.  
  18. //mChildren.get(i).setDragResizing(true, DRAG_RESIZE_MODE_DOCKED_DIVIDER)
  19. //mChildren.get(i).setWaitingForDrawnIfResizingChanged()
  20. void beginImeAdjustAnimation()
  21.  
  22. //mChildren.get(j).setDragResizing(false, DRAG_RESIZE_MODE_DOCKED_DIVIDER)
  23. void endImeAdjustAnimation()
  24.  
  25. //task.alignToAdjustedBounds(mAdjustedBounds, insetBounds, getDockSide() == DOCKED_TOP)
  26. void applyAdjustForImeIfNeeded(Task task)

        （12）画中画（PictureInPicture）

  1. Rect getPictureInPictureBounds(float aspectRatio, Rect stackBounds)
  2.  
  3. void setPictureInPictureAspectRatio(float aspectRatio)
  4.  
  5. void setPictureInPictureActions(List<RemoteAction> actions)

        （13）Pinned 相关

  1. //getPendingTransaction().setAlpha(sc, mCancelCurrentBoundsAnimation ? 1 : alpha)
  2. public boolean setPinnedStackAlpha(float alpha)
  3.  
  4. //mWmService.mActivityTaskManager.resizePinnedStack(stackBounds, tempTaskBounds)
  5. public boolean setPinnedStackSize(Rect stackBounds, Rect tempTaskBounds)
  6.  
  7. return mBoundsAnimating && mCancelCurrentBoundsAnimation
  8. public boolean pinnedStackResizeDisallowed()
  9.  
  10. void animateResizePinnedStack(Rect toBounds, Rect sourceHintBounds, int animationDuration, boolean fromFullscreen)
  11.  
  12. //inOutBounds.set(mTmpRect3)
  13. boolean calculatePinnedBoundsForConfigChange(Rect inOutBounds)

        （14）dim 相关

  1. //getBounds(out)
  2. public void getDimBounds(Rect out)
  3.  
  4. //mDimmer.dimAbove(getPendingTransaction(), alpha)
  5. void dim(float alpha)
  6.  
  7. //mDimmer.stopDim(getPendingTransaction())
  8. void stopDimming()

         （15）其他

  1. //return (canSpecifyOrientation()) ? super.getOrientation() : SCREEN_ORIENTATION_UNSET
  2. int getOrientation()
  3.  
  4. //updateSurfaceSize(getPendingTransaction())
  5. public void onConfigurationChanged(Configuration newParentConfig)
  6.  
  7. //mWmService.mWindowPlacerLocked.requestTraversal()
  8. void onParentChanged()
  9.  
  10. //return (mBoundsAnimatingRequested || mBoundsAnimating)
  11. public boolean deferScheduleMultiWindowModeChanged()
  12.  
  13. boolean shouldIgnoreInput()
  14.  
  15. public boolean shouldDeferStartOnMoveToFullscreen()
  16.  
  17. void switchUser()
  18.  
  19. int getMinimizeDistance()
  20.  
  21. //getDisplayContent().mBoundsAnimationController.onAllWindowsDrawn()
  22. void onAllWindowsDrawn()
  23.  
  24. boolean checkCompleteDeferredRemoval()
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