Lab 4, in coursera.

AddToDoActivity.java

package course.labs.todomanager;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.TimePicker;

import java.util.Calendar;
import java.util.Date;

import course.labs.todomanager.ToDoItem.Priority;
import course.labs.todomanager.ToDoItem.Status;

public class AddToDoActivity extends Activity {

	// 7 days in milliseconds - 7 * 24 * 60 * 60 * 1000
	private static final int SEVEN_DAYS = 604800000;

	private static final String TAG = "Lab-UserInterface";

	private static String timeString;
	private static String dateString;
	private static TextView dateView;
	private static TextView timeView;

	private Date mDate;
	private RadioGroup mPriorityRadioGroup;
	private RadioGroup mStatusRadioGroup;
	private EditText mTitleText;
	private RadioButton mDefaultStatusButton;
	private RadioButton mDefaultPriorityButton;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.add_todo);

		mTitleText = (EditText) findViewById(R.id.title);
		mDefaultStatusButton = (RadioButton) findViewById(R.id.statusNotDone);
		mDefaultPriorityButton = (RadioButton) findViewById(R.id.medPriority);
		mPriorityRadioGroup = (RadioGroup) findViewById(R.id.priorityGroup);
		mStatusRadioGroup = (RadioGroup) findViewById(R.id.statusGroup);
		dateView = (TextView) findViewById(R.id.date);
		timeView = (TextView) findViewById(R.id.time);

		// Set the default date and time

		setDefaultDateTime();

		// OnClickListener for the Date button, calls showDatePickerDialog() to
		// show
		// the Date dialog

		final Button datePickerButton = (Button) findViewById(R.id.date_picker_button);
		datePickerButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				showDatePickerDialog();
			}
		});

		// OnClickListener for the Time button, calls showTimePickerDialog() to
		// show the Time Dialog

		final Button timePickerButton = (Button) findViewById(R.id.time_picker_button);
		timePickerButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				showTimePickerDialog();
			}
		});

		// OnClickListener for the Cancel Button,

		final Button cancelButton = (Button) findViewById(R.id.cancelButton);
		cancelButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {

				Log.i(TAG, "Entered cancelButton.OnClickListener.onClick()");

				//Indicate result and finish
                AddToDoActivity.this.setResult( RESULT_CANCELED );
                finish();
			}
		});

		//Set up OnClickListener for the Reset Button
		final Button resetButton = (Button) findViewById(R.id.resetButton);
		resetButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Log.i(TAG, "Entered resetButton.OnClickListener.onClick()");

				//Reset data to default values
                mTitleText.setText( "" );

                mDefaultStatusButton.setChecked( true );
                mDefaultPriorityButton.setChecked( true );

                Log.i( TAG, "priority: " + getPriority() );

                //mStatusRadioGroup.check( R.id.statusNotDone );
                //mPriorityRadioGroup.check( R.id.medPriority );

                setDefaultDateTime();
			}
		});

		// Set up OnClickListener for the Submit Button

		final Button submitButton = (Button) findViewById(R.id.submitButton);
		submitButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Log.i(TAG, "Entered submitButton.OnClickListener.onClick()");

				// gather ToDoItem data

				//Get the current Priority
				Priority priority = getPriority();

				// Get the current Status
				Status status = getStatus();

				//Get the current ToDoItem Title
				String titleString = getToDoTitle();

				// Construct the Date string
				String fullDate = dateString + " " + timeString;

				// Package ToDoItem data into an Intent
				Intent data = new Intent();
				ToDoItem.packageIntent(data, titleString, priority, status,
						fullDate);

				//return data Intent and finish
                AddToDoActivity.this.setResult( RESULT_OK, data );
                finish();
			}
		});
	}

    // Do not modify below this point.

	private void setDefaultDateTime() {

		// Default is current time + 7 days
		mDate = new Date();
		mDate = new Date(mDate.getTime() + SEVEN_DAYS);

		Calendar c = Calendar.getInstance();
		c.setTime(mDate);

		setDateString(c.get(Calendar.YEAR), c.get(Calendar.MONTH),
				c.get(Calendar.DAY_OF_MONTH));

		dateView.setText(dateString);

		setTimeString(c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE),
				c.get(Calendar.MILLISECOND));

		timeView.setText(timeString);
	}

	private static void setDateString(int year, int monthOfYear, int dayOfMonth) {

		// Increment monthOfYear for Calendar/Date -> Time Format setting
		monthOfYear++;
		String mon = "" + monthOfYear;
		String day = "" + dayOfMonth;

		if (monthOfYear < 10)
			mon = "0" + monthOfYear;
		if (dayOfMonth < 10)
			day = "0" + dayOfMonth;

		dateString = year + "-" + mon + "-" + day;
	}

	private static void setTimeString(int hourOfDay, int minute, int mili) {
		String hour = "" + hourOfDay;
		String min = "" + minute;

		if (hourOfDay < 10)
			hour = "0" + hourOfDay;
		if (minute < 10)
			min = "0" + minute;

		timeString = hour + ":" + min + ":00";
	}

	private Priority getPriority() {

		switch (mPriorityRadioGroup.getCheckedRadioButtonId()) {
            case R.id.lowPriority: {
                return Priority.LOW;
            }
            case R.id.highPriority: {
                return Priority.HIGH;
            }
            default: {
                return Priority.MED;
            }
		}
	}

	private Status getStatus() {

		switch (mStatusRadioGroup.getCheckedRadioButtonId()) {
            case R.id.statusDone: {
                return Status.DONE;
            }
            default: {
                return Status.NOTDONE;
            }

		}
	}

	private String getToDoTitle() {
		return mTitleText.getText().toString();
	}
	
	
	// DialogFragment used to pick a ToDoItem deadline date

	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);
		}

		@Override
		public void onDateSet(DatePicker view, int year, int monthOfYear,
				int dayOfMonth) {
			setDateString(year, monthOfYear, dayOfMonth);

			dateView.setText(dateString);
		}

	}

	// DialogFragment used to pick a ToDoItem deadline time

	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
			return new TimePickerDialog(getActivity(), this, hour, minute, true);
		}

		public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
			setTimeString(hourOfDay, minute, 0);

			timeView.setText(timeString);
		}
	}

	private void showDatePickerDialog() {
		DialogFragment newFragment = new DatePickerFragment();
		newFragment.show(getFragmentManager(), "datePicker");
	}

	private void showTimePickerDialog() {
		DialogFragment newFragment = new TimePickerFragment();
		newFragment.show(getFragmentManager(), "timePicker");
	}
}