从Simpleadapter更新ListView,并使用新数据
-
24-10-2019 - |
题
我已经实现了一个自定义listView,其中包含来自找到的教程的多个文本视图 这里 一切都很好,但是我希望能够使用新数据即时更新文本视图。
例如,我在ListView中的项目上设置单击“侦听器”,并在单击时显示了一个对话框,该对话框提示用户输入数据。我可以通过调用populatelist()并更新数组来获取新数据,但是在活动重新启动之前,在文本视图中不显示新数据。我该如何告诉SimpleDapter获取新数据并在对话框被驳回后立即显示?
编辑:显示的代码:
在on Create中:
lv = (ListView) findViewById(R.id.list);
adapter = new SimpleAdapter(
this,
list,
R.layout.listtextview,
new String[] {"Title","Desc"},
new int[] {R.id.settingsListItem,R.id.settingsListDesc}
);
populateList(settingsList, settingsListDetails);
lv.setAdapter(adapter);
lv.setOnItemClickListener
(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View
view,int position, long id)
{
if (position == 0)
{
showDialog(WAKE_TIME);
}
}
});
提出对话框:
public Dialog onCreateDialog(int id)
{
switch(id) {
case WAKE_TIME :
return new TimePickerDialog(this,WakeTimeSetListener,
wakeHour, wakeMinute, false);
}
NotifyDataSethanged的“ TimePicker对话框”称为:
private TimePickerDialog.OnTimeSetListener WakeTimeSetListener = new
TimePickerDialog.OnTimeSetListener()
{
public void onTimeSet(TimePicker view, int hourOfDay, int minute)
{
wakeHour = hourOfDay;
wakeMinute = minute;
wakeHourText = Integer.toString(hourOfDay);
wakeMinuteText = Integer.toString(minute);
String preftime = hourOfDay + ":" + minute;
SimpleDateFormat df = new SimpleDateFormat("HH:mm");
SimpleDateFormat dfOut = new SimpleDateFormat("hh:mm a");
try
{
wakeDate = df.parse(preftime);
}
catch (ParseException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
populateList(settingsList, settingsListDetails);
adapter.notifyDataSetChanged();
}
解决方案
你有没有尝试过
adapter.notifyDataSetChanged();
不隶属于 StackOverflow