错误 java.lang.IllegalArgumentException: parameter must be a descendant of this view 的解决方案

listviewexceptionthread

bug信息：

10-16 17:27:20.250: D/AndroidRuntime(14662): Shutting down VM
10-16 17:27:20.250: W/dalvikvm(14662): threadid=1: thread exiting with uncaught exception (group=0x40a5e228)
10-16 17:27:20.250: E/AndroidRuntime(14662): FATAL EXCEPTION: main
10-16 17:27:20.250: E/AndroidRuntime(14662): java.lang.IllegalArgumentException: parameter must be a descendant of this view
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.ViewGroup.offsetRectBetweenParentAndChild(ViewGroup.java:4460)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.ViewGroup.offsetDescendantRectToMyCoords(ViewGroup.java:4397)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.widget.HorizontalScrollView.isWithinDeltaOfScreen(HorizontalScrollView.java:1054)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.widget.HorizontalScrollView.onSizeChanged(HorizontalScrollView.java:1415)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.View.setFrame(View.java:11442)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.View.layout(View.java:11353)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.ViewGroup.layout(ViewGroup.java:4531)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.View.layout(View.java:11359)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.ViewGroup.layout(ViewGroup.java:4531)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1628)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1486)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.widget.LinearLayout.onLayout(LinearLayout.java:1399)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.View.layout(View.java:11359)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.ViewGroup.layout(ViewGroup.java:4531)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.View.layout(View.java:11359)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.ViewGroup.layout(ViewGroup.java:4531)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1665)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2695)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.os.Handler.dispatchMessage(Handler.java:99)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.os.Looper.loop(Looper.java:154)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at android.app.ActivityThread.main(ActivityThread.java:4974)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at java.lang.reflect.Method.invokeNative(Native Method)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at java.lang.reflect.Method.invoke(Method.java:511)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
10-16 17:27:20.250: E/AndroidRuntime(14662):  at dalvik.system.NativeStart.main(Native Method)

场景描述：

        用listview写的一个书架，点击超出一屏区域的书本进入阅读模块，在返回时会抛出如上崩溃信息，若是未超出屏幕区域的书本则不会崩溃。

分析与解决：

       parameter must be a descendant of this view 是说这个parameter必须是这个view的子孙...

        因为我的listview外面嵌套的有一个HorizontalScrollView所以很有可能就是它们两个冲突导致的，跟踪查看HorizontalScrollView的源码及分析日志信息，出现这个bug的前提条件：当listview向下滚动了再返回时会调用HorizontalScrollView的onSizeChanged()方法，在onSizeChanged()方法中调用了findfocus方法得到返回的界面中当前拥有焦点的view。从上面那句话话可以看出关键点就在这个view上，如果它是HorizontalScrollView 的子孙程序就不会崩溃了，所以让程序返回时焦点直接落在某一指定view上就可以了。我这时是让listview一直拥有焦点，覆写了它的isFocused方法让它一直返回true,问题就解决了！！