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所以我正在研究一个滚动布局，它有几个标题行（图片和诸如此类）和一个 ViewPager。我使用 MergeAdapter 是因为我想使用 Sticky List Headers 库来制作 ViewPager 指示器选项卡，从技术上讲，它理想地最终会成为一个列表项，当用户滚动时，它会粘在顶部。我所做的一切就像演示一样，但是当我运行我的代码时，我的 logcat 中出现错误：

01-07 00:02:19.009: W/dalvikvm(12044): threadid=1: thread exiting with uncaught exception (group=0x40e2d930)
01-07 00:02:19.063: E/AndroidRuntime(12044): FATAL EXCEPTION: main
01-07 00:02:19.063: E/AndroidRuntime(12044): java.lang.RuntimeException: You must override newView()!
01-07 00:02:19.063: E/AndroidRuntime(12044):    at com.commonsware.cwac.sacklist.SackOfViewsAdapter.newView(SackOfViewsAdapter.java:175)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at com.commonsware.cwac.sacklist.SackOfViewsAdapter.getView(SackOfViewsAdapter.java:147)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at com.commonsware.cwac.merge.MergeAdapter.getView(MergeAdapter.java:271)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.AbsListView.obtainView(AbsListView.java:2159)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.ListView.makeAndAddView(ListView.java:1831)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.ListView.fillDown(ListView.java:674)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.ListView.fillFromTop(ListView.java:735)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.ListView.layoutChildren(ListView.java:1652)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.AbsListView.onLayout(AbsListView.java:1994)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.View.layout(View.java:14003)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.View.layout(View.java:14003)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.View.layout(View.java:14003)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.View.layout(View.java:14003)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1663)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1521)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.View.layout(View.java:14003)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at com.slidingmenu.lib.CustomViewAbove.onLayout(CustomViewAbove.java:849)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.View.layout(View.java:14003)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.RelativeLayout.onLayout(RelativeLayout.java:985)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.View.layout(View.java:14003)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.View.layout(View.java:14003)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewGroup.layout(ViewGroup.java:4375)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1892)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1711)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.Choreographer.doCallbacks(Choreographer.java:562)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.Choreographer.doFrame(Choreographer.java:532)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)01-07          00:02:19.063: E/AndroidRuntime(12044):    at android.os.Handler.handleCallback(Handler.java:725)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.os.Handler.dispatchMessage(Handler.java:92)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.os.Looper.loop(Looper.java:137)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at android.app.ActivityThread.main(ActivityThread.java:5191)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at java.lang.reflect.Method.invokeNative(Native Method)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at java.lang.reflect.Method.invoke(Method.java:511)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
01-07 00:02:19.063: E/AndroidRuntime(12044):    at dalvik.system.NativeStart.main(Native Method)

我有 MergeAdapter 和 SackOfViewsAdapter 的 jar 文件，所以我不知道发生了什么。如果我注释掉 ViewPager 的东西，我什至会得到同样的错误。

如果您想通过 addView、addViews 等添加 XML 元素，有没有一种方法必须构造您的 XML？

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1 回答 1

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不知何故，要么MergeAdapter认为其中的内容SackOfViewsAdapter比实际的要多，要么您null在提交给的视图列表中有一个条目（或者您通过添加MergeAdapter addViews()的单个条目。我的钱在场景中。null ViewaddView()null

您应该能够自己确定是否是null入口问题，方法是检查您作为视图提供的内容MergeAdapter。

如果您无法追查问题，并且如果您可以创建一个示例项目来重现错误，请使用指向示例源代码的指针提交问题，我会查看它。

于 2013-01-07T12:31:51.727 回答