使1个自定义视图无效会导致视图组中的所有自定义视图失效？

Question

我有一个自定义视图组.在该自定义视图组中有许多自定义视图.自定义视图在布局中彼此重叠.

重叠视图是创建"图层"的必要条件.因此,一个图层可能会创建一些静态内容,但另一个分层视图会创建不同的动画内容.当我从一个视图上的另一个线程调用.postInvalidate时出现问题,该视图基本上是以60FPS运行的动画.在分层视图之外60FPS对于我正在使用的设备(Galaxy S3)是可实现的.

在此自定义视图组中,.invalidate会导致2个硬件渲染视图中的1个无效,并且某些软件视图会使其无效.

MyCustomViewThatShouldNotInvalidate(AbstractDialLayer).onDraw(Canvas) line: 68    
MyCustomViewThatShouldNotInvalidate.onDraw(Canvas) line: 79    
MyCustomViewThatShouldNotInvalidate(View).draw(Canvas) line: 13650    
MyCustomViewThatShouldNotInvalidate(View).draw(Canvas, ViewGroup, long) line: 13534    
MyCustomViewGroup(ViewGroup).drawChild(Canvas, View, long) line: 2938    
MyCustomViewGroup(ViewGroup).dispatchDraw(Canvas) line: 2808    
MyCustomViewGroup(View).buildDrawingCache(boolean) line: 12909    
MyCustomViewGroup(View).getDisplayList(DisplayList, boolean) line: 12580    
MyCustomViewGroup(View).getDisplayList() line: 12645
RelativeLayout(ViewGroup).dispatchGetDisplayList() line: 2920    
RelativeLayout(View).getDisplayList(DisplayList, boolean) line: 12537    
RelativeLayout(View).getDisplayList() line: 12645    
RelativeLayout(ViewGroup).dispatchGetDisplayList() line: 2920    
RelativeLayout(View).getDisplayList(DisplayList, boolean) line: 12537    
RelativeLayout(View).getDisplayList() line: 12645    
NoSaveStateFrameLayout(ViewGroup).dispatchGetDisplayList() line: 2920    
NoSaveStateFrameLayout(View).getDisplayList(DisplayList, boolean) line: 12537    
NoSaveStateFrameLayout(View).getDisplayList() line: 12645    
ViewPager(ViewGroup).dispatchGetDisplayList() line: 2920    
ViewPager(View).getDisplayList(DisplayList, boolean) line: 12537    
ViewPager(View).getDisplayList() line: 12645    
LinearLayout(ViewGroup).dispatchGetDisplayList() line: 2920    
LinearLayout(View).getDisplayList(DisplayList, boolean) line: 12537    
LinearLayout(View).getDisplayList() line: 12645    
RelativeLayout(ViewGroup).dispatchGetDisplayList() line: 2920    
RelativeLayout(View).getDisplayList(DisplayList, boolean) line: 12537    
RelativeLayout(View).getDisplayList() line: 12645    
NoSaveStateFrameLayout(ViewGroup).dispatchGetDisplayList() line: 2920    
NoSaveStateFrameLayout(View).getDisplayList(DisplayList, boolean) line: 12537    
NoSaveStateFrameLayout(View).getDisplayList() line: 12645    
LinearLayout(ViewGroup).dispatchGetDisplayList() line: 2920    
LinearLayout(View).getDisplayList(DisplayList, boolean) line: 12537    
LinearLayout(View).getDisplayList() line: 12645    
LongPressGestureDetectingFrameLayout(ViewGroup).dispatchGetDisplayList() line: 2920    
LongPressGestureDetectingFrameLayout(View).getDisplayList(DisplayList, boolean) line: 12537    
LongPressGestureDetectingFrameLayout(View).getDisplayList() line: 12645    
FrameLayout(ViewGroup).dispatchGetDisplayList() line: 2920    
FrameLayout(View).getDisplayList(DisplayList, boolean) line: 12537    
FrameLayout(View).getDisplayList() line: 12645    
LinearLayout(ViewGroup).dispatchGetDisplayList() line: 2920    
LinearLayout(View).getDisplayList(DisplayList, boolean) line: 12537    
LinearLayout(View).getDisplayList() line: 12645    
CustomViewAbove(ViewGroup).dispatchGetDisplayList() line: 2920    
CustomViewAbove(View).getDisplayList(DisplayList, boolean) line: 12537    
CustomViewAbove(View).getDisplayList() line: 12645    
SlidingMenu(ViewGroup).dispatchGetDisplayList() line: 2920    
SlidingMenu(View).getDisplayList(DisplayList, boolean) line: 12537    
SlidingMenu(View).getDisplayList() line: 12645    
PhoneWindow$DecorView(ViewGroup).dispatchGetDisplayList() line: 2920    
PhoneWindow$DecorView(View).getDisplayList(DisplayList, boolean) line: 12537    
PhoneWindow$DecorView(View).getDisplayList() line: 12645    
HardwareRenderer$Gl20Renderer(HardwareRenderer$GlRenderer).draw(View, View$AttachInfo,         HardwareRenderer$HardwareDrawCallbacks, Rect) line: 1170    
ViewRootImpl.draw(boolean) line: 2275    
ViewRootImpl.performDraw() line: 2147    
ViewRootImpl.performTraversals() line: 1958    
ViewRootImpl.doTraversal() line: 1112    
ViewRootImpl$TraversalRunnable.run() line: 4474    
Choreographer$CallbackRecord.run(long) line: 725    
Choreographer.doCallbacks(int, long) line: 555    
Choreographer.doFrame(long, int) line: 525    
Choreographer$FrameDisplayEventReceiver.run() line: 711    
Handler.handleCallback(Message) line: 615    
Choreographer$FrameHandler(Handler).dispatchMessage(Message) line: 92    
Looper.loop() line: 137    
ActivityThread.main(String[]) line: 4918    
Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not         available [native method]    
Method.invoke(Object, Object...) line: 511    
ZygoteInit$MethodAndArgsCaller.run() line: 1004    
ZygoteInit.main(String[]) line: 771    
NativeStart.main(String[]) line: not available [native method]    

Answer 1

视图上的 Invalidate 会将 invalidate 调用链接到视图层次结构中的父级。如果这是硬件加速的，它可能会使所有内容无效，具体取决于 HardwareRenderer 类中的标志。这是一个优化。您可以检查无效的实现。这是相关调用的链接 - Invalidate() - 检查硬件加速

可以肯定的是，您可以在该应用程序中检查设备上的 HardwareRenderer.RENDER_DIRTY_REGIONS 的值。