将退出和进入Activity转换添加到应用程序后，我收到如下崩溃报告:FatalException:java.lang.NullPointerException:Attempttoinvokevirtualmethod'android.view.ViewParentandroid.view.View.getParent()'onanullobjectreferenceatandroid.view.ViewOverlay$OverlayViewGroup.add(ViewOverlay.java:164)atandroid.view.ViewGroupOverlay.add(ViewGr