Fragmentation

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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

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