点击调试悬浮球崩溃了！

[RockyQu]

在开启“不保留活动”退到后台，再点应用图标后能正常恢复，但是点击悬浮球崩溃，报以下错误

java.lang.IllegalStateException: Fragment has not been attached yet.
at android.support.v4.app.Fragment.instantiateChildFragmentManager(Fragment.java:2383)
at android.support.v4.app.Fragment.getChildFragmentManager(Fragment.java:845)
at me.yokeyword.fragmentation.debug.DebugStackDelegate.getChildFragmentRecords(DebugStackDelegate.java:185)
at me.yokeyword.fragmentation.debug.DebugStackDelegate.addDebugFragmentRecord(DebugStackDelegate.java:218)
at me.yokeyword.fragmentation.debug.DebugStackDelegate.getChildFragmentRecords(DebugStackDelegate.java:190)
at me.yokeyword.fragmentation.debug.DebugStackDelegate.addDebugFragmentRecord(DebugStackDelegate.java:218)
at me.yokeyword.fragmentation.debug.DebugStackDelegate.getFragmentRecords(DebugStackDelegate.java:155)
at me.yokeyword.fragmentation.debug.DebugStackDelegate.showFragmentStackHierarchyView(DebugStackDelegate.java:103)
at me.yokeyword.fragmentation.debug.DebugStackDelegate$1.onClick(DebugStackDelegate.java:69)
at android.view.View.performClick(View.java:6291)
at me.yokeyword.fragmentation.debug.DebugStackDelegate$StackViewTouchListener.onTouch(DebugStackDelegate.java:264)
at android.view.View.dispatchTouchEvent(View.java:11784)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2974)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2661)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2974)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2661)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2974)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2661)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2974)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2661)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2974)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2661)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:549)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1953)
at android.app.Activity.dispatchTouchEvent(Activity.java:3559)
at me.yokeyword.fragmentation.SupportActivity.dispatchTouchEvent(SupportActivity.java:59)
at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:502)
at android.view.View.dispatchPointerEvent(View.java:12027)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5304)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5093)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4588)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4641)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4607)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4734)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4615)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4791)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4588)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4641)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4607)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4615)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4588)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7195)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7169)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7130)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7351)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:192)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:379)
at android.os.Looper.loop(L

[JantHsueh]

我和你遇到同样的问题，主要原因是栈中出现了连续两个同一类的实例，使用上加以规范就可避免这个问题。

我写了篇文章，从源码详细分析了该问题，希望对你有帮助，我后续会对该库继续进行维护。
Fragment has not been attached yet 解决方法及源码详解