從ListView和ArrayAdapter中刪除項目

Question

我正在嘗試編寫一個簡單的代碼，當用戶單擊它時刪除一個ListView項。 我的代碼：

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();
}

單擊該項目時，應用程序因以下錯誤而崩潰：

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Java和Android的新手，如果可以的話，請為初學者清楚地說明操作方法。
預先感謝您。

Answer 1

您可以使用：

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

Arrays.asList()僅創建一個指向arrayList的列表，該列表仍然只是String的原始數組。 而且，您無法在原始數組上執行諸如remove()類的復雜操作。 Collections.addAll()使用您的arraylist值填充真實list 。