Filter ListView通過適配器

Question

我有一個ListView與適配器設置。

此適配器接收對象列表。 在這些對象中，有一個屬性isActivated。 如果此屬性爲false，我不想將此項目顯示到ListView中，但我不想從通過適配器傳遞的對象列表中刪除Object。

我嘗試從適配器的getView（）方法返回null，但顯然不是這樣。

我該怎麼辦？

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) 

Answer 1

將有在適配器的每個對象的圖。因此，您希望該視圖在！isActivated時不可見，而不是空。嘗試讓getView（）返回行的任何類型的視圖，高度爲零。

它看起來很黑客，除非你的適配器有成千上萬的項目，你應該在創建之前過濾列表。