Filter ListView通过适配器

此适配器接收对象列表。在这些对象中，有一个属性isActivated。如果此属性为false，我不想将此项目显示到ListView中，但我不想从通过适配器传递的对象列表中删除Object。

我尝试从适配器的getView（）方法返回null，但显然不是这样。

我该怎么办？

ERROR：

questions04-01 12:21:54.290: E/AndroidRuntime(5593): FATAL EXCEPTION: main 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): java.lang.NullPointerException 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.ListView.fillDown(ListView.java:692) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.ListView.fillFromTop(ListView.java:750) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.ListView.layoutChildren(ListView.java:1629) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.AbsListView.onLayout(AbsListView.java:1993) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.View.layout(View.java:9606) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.ViewGroup.layout(ViewGroup.java:3879) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.setChildFrame(LinearLayout.java:1542) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.layoutVertical(LinearLayout.java:1403) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.onLayout(LinearLayout.java:1314) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.View.layout(View.java:9606) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.ViewGroup.layout(ViewGroup.java:3879) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.setChildFrame(LinearLayout.java:1542) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1527) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.onLayout(LinearLayout.java:1316) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.View.layout(View.java:9606) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.ViewGroup.layout(ViewGroup.java:3879) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.setChildFrame(LinearLayout.java:1542) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.layoutVertical(LinearLayout.java:1403) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.onLayout(LinearLayout.java:1314) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.View.layout(View.java:9606) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.ViewGroup.layout(ViewGroup.java:3879) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.FrameLayout.onLayout(FrameLayout.java:400) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.View.layout(View.java:9606) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.ViewGroup.layout(ViewGroup.java:3879) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.setChildFrame(LinearLayout.java:1542) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.layoutVertical(LinearLayout.java:1403) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.LinearLayout.onLayout(LinearLayout.java:1314) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.View.layout(View.java:9606) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.ViewGroup.layout(ViewGroup.java:3879) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.widget.FrameLayout.onLayout(FrameLayout.java:400) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.View.layout(View.java:9606) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.ViewGroup.layout(ViewGroup.java:3879) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.ViewRoot.performTraversals(ViewRoot.java:1288) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.view.ViewRoot.handleMessage(ViewRoot.java:2066) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.os.Handler.dispatchMessage(Handler.java:99) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.os.Looper.loop(Looper.java:132) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat android.app.ActivityThread.main(ActivityThread.java:4126) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat java.lang.reflect.Method.invokeNative(Native Method) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat java.lang.reflect.Method.invoke(Method.java:491) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602) 
questions04-01 12:21:54.290: E/AndroidRuntime(5593): questionsat dalvik.system.NativeStart.main(Native Method)

来源

2012-04-01 Nico

你得到了什么错误 – Ishu 2012-04-01 10:05:42

@nico如果你返回null，那么任何错误出现？ – 2012-04-01 10:20:52

@Samir是的，这是我返回null时得到的错误。 – Nico 2012-04-01 10:57:37

将有在适配器的每个对象的图。因此，您希望该视图在！isActivated时不可见，而不是空。尝试让getView（）返回行的任何类型的视图，高度为零。

它看起来很黑客，除非你的适配器有成千上万的项目，你应该在创建之前过滤列表。

来源

2012-04-01 11:02:59 pouzzler

是的，我尝试了两种解决方案。没有设置项目的文本，但随着项目膨胀一个带边框的布局，我们可以看到有什么东西。所以现在我直接过滤了我传递给适配器的列表，但是如果你有更好的选择，我可以拿它:) – Nico 2012-04-01 11:17:08

Filter ListView通过适配器

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