我想使用 timePickerDialog
开发简单的闹钟应用程序。问题是构造函数 TimePickerDialog 在 extends fragment
上未定义。
我该怎么办?有什么建议吗?
请帮帮我。谢谢你的关心。
这是部分代码。
public class ReminderFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_reminder, container, false);
textAlarmPrompt = (TextView) v.findViewById(R.id.alarmprompt);
buttonstartSetDialog = (Button) v.findViewById(R.id.startSetDialog);
buttonstartSetDialog.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
textAlarmPrompt.setText("");
openTimePickerDialog(false);
}});
return v;
}
private void openTimePickerDialog(boolean is24r){
Calendar calendar = Calendar.getInstance();
timePickerDialog = new TimePickerDialog(
ReminderFragment.this,
onTimeSetListener,
calendar.get(Calendar.HOUR_OF_DAY),
calendar.get(Calendar.MINUTE),
is24r);
timePickerDialog.setTitle("Set Alarm Time");
timePickerDialog.show();
}
OnTimeSetListener onTimeSetListener= new OnTimeSetListener(){
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
Calendar calNow = Calendar.getInstance();
Calendar calSet = (Calendar) calNow.clone();
calSet.set(Calendar.HOUR_OF_DAY, hourOfDay);
calSet.set(Calendar.MINUTE, minute);
calSet.set(Calendar.SECOND, 0);
calSet.set(Calendar.MILLISECOND, 0);
if(calSet.compareTo(calNow) <= 0){
//Today Set time passed, count to tomorrow
calSet.add(Calendar.DATE, 1);
}
setAlarm(calSet);
}};
}
最佳答案
使用 getActivity()
而不是这个 ReminderFragment.this
。第一个参数是上下文 ReminderFragment.this
引用 ReminderFragment
。 getActivity()
返回与此 Fragment 关联的 Activity。
timePickerDialog = new TimePickerDialog(
getActivity(),
onTimeSetListener,
calendar.get(Calendar.HOUR_OF_DAY),
calendar.get(Calendar.MINUTE),
is24r);
关于android - 构造函数 TimePickerDialog 未定义,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23156642/