android - Pickers（Time DatePicker）

》 Android provides controls for the user to pick a time or pick a date as ready-to-use dialogs. Each picker provides controls for selecting each part of the time (hour, minute, AM/PM) or date (month, day, year). Using these pickers helps ensure that your users can pick a time or date that is valid, formatted correctly, and adjusted to the user's locale.

》We recommend that you use DialogFragment to host each time or date picker. The DialogFragment manages the dialog lifecycle for you and allows you to display the pickers in different layout configurations, such as in a basic dialog on handsets or as an embedded part of the layout on large screens.

Although DialogFragment was first added to the platform in Android 3.0 (API level 11), if your app supports versions of Android older than 3.0—even as low as Android 1.6—you can use the DialogFragment class that's available in the support library for backward compatibility.

public static class TimePickerFragment extends DialogFragment                            implements TimePickerDialog.OnTimeSetListener {    @Override    public Dialog onCreateDialog(Bundle savedInstanceState) {        // Use the current time as the default values for the picker        final Calendar c = Calendar.getInstance();        int hour = c.get(Calendar.HOUR_OF_DAY);        int minute = c.get(Calendar.MINUTE);        // Create a new instance of TimePickerDialog and return it        return new TimePickerDialog(getActivity(), this, hour, minute,                DateFormat.is24HourFormat(getActivity()));    }    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {        // Do something with the time chosen by the user    }}

Note: If your app supports versions of Android older than 3.0, be sure you've set up your Android project with the support library as described in Setting Up a Project to Use a Library.

public static class DatePickerFragment extends DialogFragment                            implements DatePickerDialog.OnDateSetListener {    @Override    public Dialog onCreateDialog(Bundle savedInstanceState) {        // Use the current date as the default date in the picker        final Calendar c = Calendar.getInstance();        int year = c.get(Calendar.YEAR);        int month = c.get(Calendar.MONTH);        int day = c.get(Calendar.DAY_OF_MONTH);        // Create a new instance of DatePickerDialog and return it        return new DatePickerDialog(getActivity(), this, year, month, day);    }    public void onDateSet(DatePicker view, int year, int month, int day) {        // Do something with the date chosen by the user    }}

》 Caution: If your app supports versions of Android lower than 3.0, be sure that you callgetSupportFragmentManager() to acquire an instance of FragmentManager. Also make sure that your activity that displays the time picker extends FragmentActivity instead of the standard Activity class.