se.chalmers.watchme.ui.DatePickerFragment.java Source code

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Here is the source code for se.chalmers.watchme.ui.DatePickerFragment.java

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/**
 *   DatePickerFragment.java
 *
 *  Class for showing the Android date-picker and returning the selected date
 *
 *   @author Robin Andersson
 *   @copyright (c) 2012 Johan Brook, Robin Andersson, Lisa Stenberg, Mattias Henriksson
 *   @license MIT
 */

package se.chalmers.watchme.ui;

import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.widget.DatePicker;

public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {

    private Calendar pickedDate;
    private DatePickerListener datePickerListener;

    /**
     * Safety check so that the acitivity that called the date picker is
     * implementing the required DatePickerListener interface.
     * 
     * @throws ClassCastException
     *             Is thrown if the activity that called the datepicker does not
     *             implement DatePickerListener interface
     */
    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);

        try {
            datePickerListener = (DatePickerListener) activity;
        }

        catch (ClassCastException e) {
            throw new ClassCastException(activity.toString() + " must implement DatePickerListener");
        }
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        // Use the current date as the default date in the picker
        pickedDate = Calendar.getInstance();
        int year = pickedDate.get(Calendar.YEAR);
        int month = pickedDate.get(Calendar.MONTH);
        int day = pickedDate.get(Calendar.DAY_OF_MONTH);

        DatePickerDialog datePickerDialog = new DatePickerDialog(getActivity(), this, year, month, day);
        // Disallow any earlier dates than today's date
        datePickerDialog.getDatePicker().setMinDate(pickedDate.getTimeInMillis());

        // Create a new instance of DatePickerDialog and return it
        return datePickerDialog;
    }

    /**
     * Callback method for when the user sets a date.
     * 
     * Calls the appropriate method to set the date on the activity that
     * initialized the date picker.
     */
    public void onDateSet(DatePicker view, int year, int month, int day) {

        pickedDate.set(year, month, day);
        datePickerListener.setDate(pickedDate);
    }

    /**
     * Interface for sending the date back to the activity that initialized it.
     * Observe - that activity must implement this interface.
     */
    public interface DatePickerListener {

        /**
         * Sets the date of the activity that initialized the date picker.
         * 
         * @param releaseDate
         *            The movie's release date
         */
        public void setDate(Calendar pickedDate);
    }

}