ConstraintLayout与StackOverflowError崩溃

Question

我上周从不同设备通过Firebase Crashlytics获得了多个奇怪的崩溃报告.他们是:

• 来自Android 4的100%(4.2 - 4.4)
• 大部分(98%)来自三星平板电脑

堆栈跟踪是相同的,不包括对我的代码的任何引用,所以我不知道崩溃发生在哪里以及原因.搜索我的例外没有任何结果.所以我希望有人可以帮助我调查这些崩溃事件.据我所知,崩溃发生在ConstraintLayout库中的某个地方(我使用的是1.1.3版本).

崩溃堆栈跟踪:

Fatal Exception: java.lang.StackOverflowError
   at java.util.HashMap$KeySet.<init>(HashMap.java:911)
   at java.util.HashMap$KeySet.<init>(HashMap.java:911)
   at java.util.HashMap.keySet(HashMap.java:696)
   at java.util.HashSet.iterator(HashSet.java:161)
   at android.support.constraint.solver.widgets.ResolutionNode.didResolve(ResolutionNode.java:70)
   at android.support.constraint.solver.widgets.ResolutionAnchor.resolve(ResolutionAnchor.java:140)
   at android.support.constraint.solver.widgets.ResolutionNode.didResolve(ResolutionNode.java:71)
   at android.support.constraint.solver.widgets.ResolutionAnchor.resolve(ResolutionAnchor.java:140)
----A lot of identical lines---- 
   at android.support.constraint.solver.widgets.ResolutionNode.didResolve(ResolutionNode.java:71)
   at android.support.constraint.solver.widgets.ResolutionAnchor.resolve(ResolutionAnchor.java:85)
   at android.support.constraint.solver.widgets.ConstraintWidgetContainer.solveGraph(ConstraintWidgetContainer.java:586)
   at android.support.constraint.solver.widgets.ConstraintWidgetContainer.optimize(ConstraintWidgetContainer.java:643)
   at android.support.constraint.solver.widgets.ConstraintWidgetContainer.layout(ConstraintWidgetContainer.java:328)
   at android.support.constraint.ConstraintLayout.solveLinearSystem(ConstraintLayout.java:1860)
   at android.support.constraint.ConstraintLayout.onMeasure(ConstraintLayout.java:1621)
   at android.view.View.measure(View.java:16749)
   at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1235)
   at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
   at android.widget.ScrollView.onMeasure(ScrollView.java:327)
   at android.view.View.measure(View.java:16749)
   at android.support.constraint.ConstraintLayout.internalMeasureChildren(ConstraintLayout.java:1227)
   at android.support.constraint.ConstraintLayout.onMeasure(ConstraintLayout.java:1572)
   at android.view.View.measure(View.java:16749)
   at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
   at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
   at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
   at android.view.View.measure(View.java:16749)
   at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
   at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1413)
   at android.widget.LinearLayout.measureVertical(LinearLayout.java:696)
   at android.widget.LinearLayout.onMeasure(LinearLayout.java:589)
   at android.view.View.measure(View.java:16749)
   at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
   at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
   at android.view.View.measure(View.java:16749)
   at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
   at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1413)
   at android.widget.LinearLayout.measureVertical(LinearLayout.java:696)
   at android.widget.LinearLayout.onMeasure(LinearLayout.java:589)
   at android.view.View.measure(View.java:16749)
   at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5295)
   at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
   at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2439)
   at android.view.View.measure(View.java:16749)
   at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2072)
   at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1175)
   at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1372)
   at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1062)
   at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5996)
   at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
   at android.view.Choreographer.doCallbacks(Choreographer.java:574)
   at android.view.Choreographer.doFrame(Choreographer.java:544)
   at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
   at android.os.Handler.handleCallback(Handler.java:733)
   at android.os.Handler.dispatchMessage(Handler.java:95)
   at android.os.Looper.loop(Looper.java:136)
   at android.app.ActivityThread.main(ActivityThread.java:5590)
   at java.lang.reflect.Method.invokeNative(Method.java)
   at java.lang.reflect.Method.invoke(Method.java:515)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
   at dalvik.system.NativeStart.main(NativeStart.java)

请帮助我找出崩溃的原因或至少如何重现它.

UPD:

在我的用户的帮助下,我找到了一个发生崩溃的地方.这是一个活动,其中布局不是从xml中膨胀,而是在onCreate()中由代码生成(ConstraintLayout作为root).

Answer 1

终于我知道是什么原因了。

我有一个活动，其中根据传递给活动的数据列表和每个项目的类型动态添加一些视图。它们被添加到 ScrollView 内的 ConstraintLayout 中。当添加的视图数量超过 ~30 时，会发生崩溃。

解决方案： 我改用RecyclerView来进行更有效的绘图并优化内存使用，问题就消失了。不要重复我的错误并使用 RecyclerView 显示大型列表。主要的错误是我无法想象这种情况，该列表会非常大，但我们在这里。

这并不能解释为什么崩溃只发生在三星设备和 Android 4.2-4.4 上，但无论如何，使用 RecyclerView 是更好的解决方案。