DateTimePicker

Create a time picker

To display a TimePickerDialog using DialogFragment, define a fragment class that extends DialogFragment and return a TimePickerDialog from the fragment's onCreateDialog() method.

Extend DialogFragment for a time picker

To define a DialogFragment for a TimePickerDialog, do the following:

• Define the onCreateDialog() method to return an instance of TimePickerDialog.

• Implement the TimePickerDialog.OnTimeSetListener interface to receive a callback when the user sets the time.

Here's an example:

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 the user picks.

    }

}

Show the time picker

After you define a DialogFragment like the one in the preceding example, you can display the time picker by creating an instance of the DialogFragment and calling the show() method.

For example, here's a button that, when tapped, calls a method to show the dialog:

<Button

    android:id="@+id/pickTime"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:text="Pick time" />

When the user taps this button, the system calls the following method: 

findViewById<Button>(R.id.pickTime).setOnClickListener {

    TimePickerFragment().show(supportFragmentManager, "timePicker");

}

This method calls show() on a new instance of the DialogFragment defined in the preceding example. The show() method requires an instance of FragmentManager and a unique tag name for the fragment. 

Create a date picker

Creating a DatePickerDialog is like creating a TimePickerDialog. The difference is the dialog you create for the fragment.

To display a DatePickerDialog using DialogFragment, define a fragment class that extends DialogFragment and return a DatePickerDialog from the fragment's onCreateDialog() method.

Extend DialogFragment for a date picker

To define a DialogFragment for a DatePickerDialog, do the following:

• Define the onCreateDialog() method to return an instance of DatePickerDialog.

• Implement the DatePickerDialog.OnDateSetListener interface to receive a callback when the user sets the date.

Here's an example:

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(requireContext(), this, year, month, day);

    }

    public void onDateSet(DatePicker view, int year, int month, int day) {

        // Do something with the date the user picks.

    }

}

See the DatePickerDialog class for information about the constructor arguments.

You just need an event that adds an instance of this fragment to your activity.

Show the date picker

After you define a DialogFragment like the preceding example, you can display the date picker by creating an instance of the DialogFragment and calling show().

For example, here's a button that, when tapped, calls a method to show the dialog:

<Button

    android:id="@+id/pickDate"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:text="Pick date"/>

When the user taps this button, the system calls the following method:

findViewById<Button>(R.id.pickDate).setOnClickListener {

    val newFragment = DatePickerFragment();

    newFragment.show(supportFragmentManager, "datePicker");

}

This method calls show() on a new instance of the DialogFragment defined in the preceding example. The show() method requires an instance of FragmentManager and a unique tag name for the fragment.