android：在listview上的字幕無法正常工作

Question

我寫了簡單的ListView，但是我有問題，當我從列表視圖中選擇某些項目時我想對文本進行字幕處理，但是它不起作用我不知道為什么我認為從listView.setOnItemSelectedListener（new OnItemSelectedListener）復制代碼時我會正確編寫代碼（）到listView.setOnItemClickListener（new OnItemClickListener（），當我單擊時可以正常工作，但是我只希望選擇它。這是我的代碼：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_settings);
    List<HashMap<String, String>> aList = new ArrayList<HashMap<String, String>>();
    for (int i = 0; i < 7; ++i) {
        HashMap<String, String> hm = new HashMap<String, String>();
        hm.put("firstLine", menu[i]);
        hm.put("secondLine", submenu[i]);
        hm.put("icon", Integer.toString(ikons[i]));
        aList.add(hm);
    }
    String[] from = { "icon", "firstLine", "secondLine" };
    int[] to = { R.id.icon, R.id.firstLine, R.id.secondLine };
    SimpleAdapter adapter = new SimpleAdapter(getBaseContext(), aList,
            R.layout.alarm_row, from, to);
    ListView listView = (ListView) findViewById(R.id.list);
    listView.setAdapter(adapter);

    listView.setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> arg0, View view,
                int arg2, long arg3) {
            TextView t = (TextView) view.findViewById(R.id.secondLine);
            t.setSelected(true);
        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub

        }
    });

    listView.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View view, int arg2,
                long arg3) {
            // TODO Auto-generated method stub
            /*
             * TextView t = (TextView) view.findViewById(R.id.secondLine);
             * t.setFocusable(true); t.setSelected(true);
             */
        }
    });
}

XML：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/panel1"
    android:layout_width="fill_parent"
    android:layout_height="?android:attr/listPreferredItemHeight"
    android:background="@drawable/listview_bg"
    android:padding="6dip" >

    <ImageView
        android:id="@+id/icon"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_alignBottom="@+id/secondLine"
        android:layout_alignParentTop="true"
        android:scaleType="center"
        android:src="@drawable/alarm_icon" />

    <TextView
        android:id="@+id/secondLine"
        android:layout_width="fill_parent"
        android:layout_height="26dip"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_toRightOf="@id/icon"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
        android:paddingLeft="15dip"
        android:paddingRight="15dip"
        android:scrollHorizontally="true"
        android:singleLine="true"
        android:text="Alarm" />

    <TextView
        android:id="@+id/firstLine"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_above="@id/secondLine"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_alignWithParentIfMissing="true"
        android:layout_toRightOf="@id/icon"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
        android:paddingLeft="15dip"
        android:paddingRight="15dip"
        android:scrollHorizontally="true"
        android:singleLine="true"
        android:text="Ustawienia Alarmu" />

</RelativeLayout>

我認為應該可以，我不知道出什么問題了，我將非常感謝您的幫助。

Answer 1

嘗試添加

t.requestFocus();

后

t.setSelected(true);

在onItemSelected

Answer 2

您應該定義一個自定義適配器，該適配器可以擴展例如BaseAdapter或您喜歡的適配器，然后在該適配器的getView方法中添加t.setSelected(true) ：

@Override
public View getView(int position, View convertView, ViewGroup parent) {
   View view = convertView;
   if (convertView == null)
    view = inflater.inflate(R.layout.row, null);

   TextView t = (TextView) view.findViewById(R.id.secondLine);
   text2.setSelected(true);
   return view;
}