Android：列表視圖中的一項不能正確顯示文本

Question

private void initializeListItems() { 
    // 1st item (position 0) 
    itemRepeatAlarm = new TextOnlyItem(); 
    itemRepeatAlarm.setTitle(getString(R.string.repeat_weekly)); 
    itemRepeatAlarm.setSubtitle(getString(R.string.never)); 
    // add the 1st item to the list adapter 
    listAdapter.addItem(itemRepeatAlarm); 

    // 2nd item (position 1) 
    itemAlarmType = new TextOnlyItem(); 
    itemAlarmType.setTitle(getString(R.string.alarm_type)); 
    // set the default option to "sound", which is the first string value in the string array called 'sound_vibrate'. 
    itemAlarmType.setSubtitle(getResources().getStringArray(R.array.sound_vibrate)[0]); 
    // add the 2nd item to the list adapter 
    listAdapter.addItem(itemAlarmType); 

    // 3rd item (position 2) 
    itemAlarmTypeVolume = new VolumeSeekbarItem(); 
    // add the 3rd item to the list adapter 
    listAdapter.addItem(itemAlarmTypeVolume); 

    // 4th item (position 3) 
    itemAlarmTone = new TextOnlyItem(); 
    itemAlarmTone.setTitle(getString(R.string.alarm_tone)); 
    itemAlarmTone.setSubtitle(getString(R.string.none)); 
    // add the 4th item to the list adapter 
    listAdapter.addItem(itemAlarmTone); 

    // 5th item (position 4) 
    itemSnooze = new TextAndSwitchItem(); 
    itemSnooze.setTitle(getString(R.string.snooze)); 
    itemSnooze.setSubtitle(getString(R.string.snooze_details)); 
    itemSnooze.check(); 
    // add the 5th item to the list adapter 
    listAdapter.addItem(itemSnooze); 

    // 6th item (position 5) 
    itemAlarmName = new TextOnlyItem(); 
    itemAlarmName.setTitle(getString(R.string.alarm_name)); 
    itemAlarmName.setSubtitle(getString(R.string.none)); 
    // add the 6th item to the list adapter 
    listAdapter.addItem(itemAlarmName); 

    // 7th item (position 6) 
    itemAlarmLock = new TextOnlyItem(); 
    itemAlarmLock.setTitle(getString(R.string.alarm_lock)); 
    // set the name of the first alarm lock option as default. 
    itemAlarmLock.setSubtitle(getResources().getStringArray(R.array.alarm_lock_list)[0]); 
    // add the 8th item to the list adapter 
    listAdapter.addItem(itemAlarmLock); 

    // notifyDataSetChanged() method belongs to the BaseAdapter class. 
    // Notifies the attached observers that the underlying data has been changed and 
    // any View reflecting the data set should refresh itself. 
    listAdapter.notifyDataSetChanged(); 
} 

當我運行代碼時，其他人沒有任何問題。但第4項itemAlarmTone沒有顯示字幕，我原本預計會有none，因爲您可以通過下面的拍攝圖像瞭解到。

正如我剛纔做了一個研究，到目前爲止，的合理原因的故障之一，是因爲列表項的佈局未設置有match_parent他們的高度值。我已經研究過佈局，確定了價值，並且似乎仍然像上面那樣。

Answer 1

我已經重寫了onResume()關於將子標題設置爲鬧鈴鈴聲項目部分的方法。我刪除了下面的部分後，它開始運作良好。

@Override 
public void onResume() { 
    super.onResume(); 
    itemAlarmTone.setSubtitle(ringtone); 
    listAdapter.notifyDataSetChanged(); 
}