android - Android：getChildDrawingOrder() 返回无效索引 1（子数为 1）

Question

这是堆栈跟踪：

Fatal Exception: java.lang.IndexOutOfBoundsException: getChildDrawingOrder() returned invalid index 1 (child count is 1)
   at android.view.ViewGroup.getAndVerifyPreorderedIndex(ViewGroup.java:1988)
   at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4204)
   at android.view.View.draw(View.java:20373)
   at android.view.View.updateDisplayListIfDirty(View.java:19315)
   at android.view.View.draw(View.java:20093)
   at android.view.ViewGroup.drawChild(ViewGroup.java:4421)
   at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4207)
   at android.view.View.updateDisplayListIfDirty(View.java:19306)
   at android.view.View.draw(View.java:20093)
   at android.view.ViewGroup.drawChild(ViewGroup.java:4421)
   at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4207)
   at android.view.View.updateDisplayListIfDirty(View.java:19306)
   at android.view.View.draw(View.java:20093)
   at android.view.ViewGroup.drawChild(ViewGroup.java:4421)
   at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4231)
   at android.view.View.draw(View.java:20373)
   at androidx.viewpager.widget.ViewPager.draw(ViewPager.java:2426)
   at android.view.View.updateDisplayListIfDirty(View.java:19315)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4405)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4385)
   at android.view.View.updateDisplayListIfDirty(View.java:19274)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4405)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4385)
   at android.view.View.updateDisplayListIfDirty(View.java:19274)
   at android.view.View.draw(View.java:20093)
   at android.view.ViewGroup.drawChild(ViewGroup.java:4421)
   at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4231)
   at android.view.View.updateDisplayListIfDirty(View.java:19306)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4405)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4385)
   at android.view.View.updateDisplayListIfDirty(View.java:19274)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4405)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4385)
   at android.view.View.updateDisplayListIfDirty(View.java:19274)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4405)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4385)
   at android.view.View.updateDisplayListIfDirty(View.java:19274)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4405)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4385)
   at android.view.View.updateDisplayListIfDirty(View.java:19274)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4405)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4385)
   at android.view.View.updateDisplayListIfDirty(View.java:19274)
   at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4405)
   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4385)
   at android.view.View.updateDisplayListIfDirty(View.java:19274)
   at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:686)
   at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:692)
   at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:800)
   at android.view.ViewRootImpl.draw(ViewRootImpl.java:3496)
   at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:3283)
   at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2818)
   at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1780)
   at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7827)
   at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
   at android.view.Choreographer.doCallbacks(Choreographer.java:723)
   at android.view.Choreographer.doFrame(Choreographer.java:658)
   at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
   at android.os.Handler.handleCallback(Handler.java:789)
   at android.os.Handler.dispatchMessage(Handler.java:98)
   at android.os.Looper.loop(Looper.java:164)
   at android.app.ActivityThread.main(ActivityThread.java:6944)
   at java.lang.reflect.Method.invoke(Method.java)
   at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

我似乎无法弄清楚如何追溯到问题。这似乎是某处带有 ViewGroup 的东西。我回头查看了代码差异，但我无法确定究竟是哪一个会导致这种情况，因为没有人操纵他们的孩子。想知道以前是否有人遇到过这个非常模糊的错误跟踪。

标签： androidindexoutofboundsexceptionviewgroup