Android Open Source - watchme Date Picker Fragment

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License

The source code is released under:

Copyright (c) 2012 Johan Brook, Robin Andersson, Lisa Stenberg, Mattias Henriksson Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documen...

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Java Source Code

/**
 *  DatePickerFragment.java//from   w  w w .  ja v  a  2s  .c  o  m
 *
 *  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);
  }

}

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