android - 使1个自定义 View 失效导致 View 组中所有自定义 View 失效？

Question

我有一个自定义 View 组。在该自定义 View 组中有许多自定义 View 。自定义 View 在布局上相互重叠。

重叠 View 是为了创建“层”。所以一层可能会创建一些静态内容，但另一个分层 View 会创建不同的动画内容。当我在一个 View 上从另一个线程调用 .postInvalidate 时，问题就来了，该 View 基本上是一个以 60FPS 运行的动画。在分层 View 之外，我使用的设备 (Galaxy S3) 可以达到 60FPS。

在此自定义 View 组中，.invalidate 导致 2 个硬件渲染 View 中的 1 个失效，并且一些软件 View 也随之失效。

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

View 上的无效会将无效调用链接到 View 层次结构中的父级。如果这是硬件加速的，它可能会根据 HardwareRenderer 类中的标志使所有内容无效。这是一个优化。您可以检查无效实现。这是相关电话的链接 - Invalidate() -check for hardware acceleration

可以肯定的是，您可以在该应用程序的设备上检查 HardwareRenderer.RENDER_DIRTY_REGIONS 的值。