我正在尝试编写一个简单的代码,当用户单击一个listview项时删除它。
我的代码:

static ArrayAdapter<String> dataAdapter;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_notifications_list);


    String[] arraylist = {"a", "b", "c", "d"};
    List<String> list = Arrays.asList(arraylist);


    dataAdapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1,
            list);

    setListAdapter(dataAdapter);

}

public void onListItemClick(ListView l, View v, final int position, long id) {
    dataAdapter.remove(dataAdapter.getItem(position));
    dataAdapter.notifyDataSetChanged();
}

单击项目时,应用程序将崩溃,并出现以下错误:
D/AndroidRuntime(31862): Shutting down VM
W/dalvikvm(31862): threadid=1: thread exiting with uncaught exception (group=0x40b4e300)
E/AndroidRuntime(31862): FATAL EXCEPTION: main
E/AndroidRuntime(31862): java.lang.UnsupportedOperationException
E/AndroidRuntime(31862):    at java.util.AbstractList.remove(AbstractList.java:638)
E/AndroidRuntime(31862):    at java.util.AbstractList$SimpleListIterator.remove(AbstractList.java:75)
E/AndroidRuntime(31862):    at java.util.AbstractCollection.remove(AbstractCollection.java:229)
E/AndroidRuntime(31862):    at android.widget.ArrayAdapter.remove(ArrayAdapter.java:244)
E/AndroidRuntime(31862):    at com.dennis.notifications.NotificationList.onListItemClick(NotificationList.java:113)
E/AndroidRuntime(31862):    at android.app.ListActivity$2.onItemClick(ListActivity.java:319)
E/AndroidRuntime(31862):    at android.widget.AdapterView.performItemClick(AdapterView.java:298)
E/AndroidRuntime(31862):    at android.widget.AbsListView.performItemClick(AbsListView.java:1088)
E/AndroidRuntime(31862):    at android.widget.AbsListView$PerformClick.run(AbsListView.java:2861)
E/AndroidRuntime(31862):    at android.widget.AbsListView$1.run(AbsListView.java:3535)
E/AndroidRuntime(31862):    at android.os.Handler.handleCallback(Handler.java:615)
E/AndroidRuntime(31862):    at android.os.Handler.dispatchMessage(Handler.java:92)
E/AndroidRuntime(31862):    at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(31862):    at android.app.ActivityThread.main(ActivityThread.java:4931)
E/AndroidRuntime(31862):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(31862):    at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime(31862):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
E/AndroidRuntime(31862):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
E/AndroidRuntime(31862):    at dalvik.system.NativeStart.main(Native Method)

我是新的Java和Android,如果可以的话,请为初学者解释清楚该怎么做。
提前谢谢你。

最佳答案

你可以使用:

String[] arraylist = {"a", "b", "c", "d"};
List<String> list = new ArrayList<String>();
Collections.addAll(list, arraylist);

Arrays.asList()只生成指向arrayList的列表,该列表仍然只是字符串的基本数组。而且不能在基元数组上执行类似remove()的复杂操作。Collections.addAll()用您的list值填充真正的arraylist

10-08 14:25