android– 覆盖notifyDataSetChanged()

概述我有一个自定义ArrayAdapter.当ListViews中显示数据时,我总是希望它排序,因此我尝试覆盖notifyDataSetChanged()以首先对适配器进行排序,如下所示：@OverridepublicvoidnotifyDataSetChanged(){sort(newComparator<IceContact>(){@Overridepublicint

我有一个自定义ArrayAdapter.当ListVIEws中显示数据时,我总是希望它排序,因此我尝试覆盖notifyDataSetChanged()以首先对适配器进行排序,如下所示：

@OverrIDepublic voID notifyDataSetChanged() {    sort(new Comparator<IceContact>() {        @OverrIDe        public int compare(IceContact iceContact, IceContact iceContact2) {            return iceContact.compareto(iceContact2);        }    });    super.notifyDataSetChanged();}

IceContact类是一个实现Comparable的get-set类.不幸的是,这给了我一个具有讽刺意味的StackOverflowError(下面的logcat).然后我试着反过来做.覆盖sort()并直接调用notifyDataSetChanged(),如下所示：

@OverrIDepublic voID sort(Comparator<? super IceContact> comparator) {    super.sort(comparator);    notifyDataSetChanged();}

这很好用！有谁能解释为什么？感觉它们几乎完全相同.

01-21 18:25:50.725: ERROR/AndroIDRuntime(2490): FATAL EXCEPTION: main    java.lang.StackOverflowError    at androID.vIEw.VIEw.setFocusableIntouchMode(VIEw.java:5584)    at androID.Widget.AdapterVIEw.checkFocus(AdapterVIEw.java:717)    at androID.Widget.AdapterVIEw$AdapterDataSetobserver.onChanged(AdapterVIEw.java:812)    at androID.Widget.AbsListVIEw$AdapterDataSetobserver.onChanged(AbsListVIEw.java:6044)    at androID.database.DataSetobservable.notifyChanged(DataSetobservable.java:37)    at androID.Widget.BaseAdapter.notifyDataSetChanged(BaseAdapter.java:50)    at androID.Widget.ArrayAdapter.notifyDataSetChanged(ArrayAdapter.java:286)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:70)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(IceContactAdapter.java:71)    at androID.Widget.ArrayAdapter.sort(ArrayAdapter.java:278)    at se.naxiait.curbits.utils.IceContactAdapter.notifyDataSetChanged(Ic

解决方法:

The class IceContact is a get-set class that implement Comparable.
Unfortunately this is giving me a, ironically, StackOverflowError
(logcat below).

sort()调用是默认的(在它的实现中)notifyDataSetChanged()然后再调用sort(),然后调用notifyDataSetChanged(),它将调用sort(),它将调用…

在notifyDataSetChanged排序中,不调用notifyDataSetChanged()作为sort()的数据将自动为您执行此 *** 作.

第二种情况将起作用,因为你基本上会调用notifyDataSetChanged()两次(super.sort(),从你的super call-> notifyDataSetChanged()调用中对data-> notifyDataSetChanged()进行排序)

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