How to save a time from the time picker and compare it

Question

I'm writing an app where I need to get the user set time from the start time time picker, and a user set time from an end time time picker. Then compare the start time and the end time with the current time. If the current time equals the start time the silence the phone. If the end time equals the current time un-silence the phone. Any help, especially code examples would be greatly appreciated. Thanks ahead of time.

public TimePickerDialog.OnTimeSetListener sTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
            sHour = hourOfDay;
            sMinute = minute;
            updateDisplay();
            displayToast();

        }
    };

    public TimePickerDialog.OnTimeSetListener eTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
            eHour = hourOfDay;
            eMinute = minute;
            updateDisplayE();
            displayToastE();

        }
    };

    public void updateDisplay() {
        startTime.setText(new StringBuilder().append(pad(sHour)).append(":")
                .append(pad(sMinute)));
        final int compareStartHour = sHour;
        Log.e("beginning", "Value " + sHour);
    }

    public void updateDisplayE()
 {
        endTime.setText(new StringBuilder().append(pad(eHour)).append(":")
                .append(pad(eMinute)));
    }

    private void displayToast() {
        Toast.makeText(
                this,
                new StringBuilder().append("Time choosen is ").append(
                        startTime.getText()), Toast.LENGTH_SHORT).show();

    }

    private void displayToastE() {
        Toast.makeText(
                this,
                new StringBuilder().append("Time choosen is ").append(
                        endTime.getText()), Toast.LENGTH_SHORT).show();

    }

    private static String pad(int c) {
        if (c >= 10)
            return String.valueOf(c);
        else
            return "0" + String.valueOf(c);
    }

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.preset_edit);
        save = (Button) findViewById(R.id.btnSave);
        TextView eventTxt = (TextView) findViewById(R.id.txtViewEvent);
        startTime = (Button) findViewById(R.id.btnStartTime);
        endTime = (Button) findViewById(R.id.btnEndTime);

        startTime.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                showDialog(TIME_DIALOG_ID);
            }
        });

        endTime.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                showDialog(TIME_DIALOG_ID2);
            }
        });

Andrii Chernenko · Answer 1 · 2013-04-12T10:12:42.197

Use Calendar class instance:

Calendar calendar=Calendar.getInstance();
calendar.set(Calendar.HOUR, tPicker.getCurrentHour());
calendar.set(Calendar.MINUTE, tPicker.getCurrentMinute());
calendar.set(Calendar.SECOND, tPicker.getCurrentSecond());
//you can also set the day, month, year etc., default values are today's

and then call

calendar.getTimeInMillis()

which will return you the time value in milliseconds (long), which you can easily compare to another.

For details, refer to the Calendar class documentation.

MysticMagicϡ · Answer 2 · 2013-04-23T04:02:36.557

1

Get time from TimePicker and save it:

Time selectedTime = new Time(sHour, sMinute, 0);

Compare it with current time or any other time:

Date time = MyClassName.convertStringToTime(selectedTime.toString());

And pass both date values to a function:

public static int compareTime(Date date1, Date date2) {
        int result = date1.compareTo(date2);

        if (result > 0) //
        {
            return 1;
        } else if (result == 0) {
            return 0;
        }
        return -1;

    }

Edit: public static class MyClassName{ public static Date convertStringToTime(String strTime) { System.out.println("Time to be converted:"+strTime+"."); Date dateTobeReturned = null;

            DateFormat sdf = new SimpleDateFormat(DateUtility.TIME_FORMAT);

            try {
                dateTobeReturned = sdf.parse(strTime);
            } catch (ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            System.out.println("Time: " + sdf.format(dateTobeReturned));


            return dateTobeReturned;
        }
    }

Please ask if you have any doubt. Hope it helps.

edited Apr 23 '13 at 04:02

answered Apr 12 '13 at 05:29

MysticMagicϡ

28,593
16
73
124

with the tPicker.getCurrentHour() exactly what would you be referring to with tPicker? This is my method for my time pickers. public TimePickerDialog.OnTimeSetListener sTimeSetListener = new TimePickerDialog.OnTimeSetListener() { public void onTimeSet(TimePicker view, int hourOfDay, int minute) { sHour = hourOfDay; sMinute = minute; updateDisplay(); displayToast(); } }; – user2247767 Apr 12 '13 at 07:07
Its TimePicker variable @user2247767 – MysticMagicϡ Apr 12 '13 at 07:08
okay, it's wanting me to match the constructor time which carries no parameters so I'm unable to get the hours and minutes @TheReader – user2247767 Apr 12 '13 at 07:20
@user2247767 Can you show some of your code in your question? Please edit it. So I can get some idea about that exactly – MysticMagicϡ Apr 12 '13 at 07:23
I have added some code. I have two buttons, in which you click and they bring up the time picker. One for start time the other for end time. – user2247767 Apr 12 '13 at 07:30
Ok, I see.. You are using TimePickerDialog and I had used TimePicker. Both have different constructors and methods. Wait. I will edit my answer and let you know @user2247767 – MysticMagicϡ Apr 12 '13 at 07:33
Yea same deal, still wants me to have that time constructor empty. @TheReader – user2247767 Apr 12 '13 at 07:38
You have imported import android.text.format.Time; .. Change to import java.sql.Time; @user2247767 – MysticMagicϡ Apr 12 '13 at 08:11
What about DateUtility? It asks me to change to DateUtils but then errors out the convertStringToTime method. @TheReader – user2247767 Apr 12 '13 at 20:20
"The method convertStringToTime(String) is undefined for the type DateUtils" this is the error it gives me @AReader – user2247767 Apr 23 '13 at 03:49
@user2247767 DateUtility was a custom class in my project in which I had kept function convertStringToTime(String) . So you will have to change the class name in which your method convertStringToTime(String) is kept. – MysticMagicϡ Apr 23 '13 at 04:01
it force closed my app unfortunately @AReader – user2247767 Apr 23 '13 at 05:04
@user2247767 Can you post the logcat o/p in pastie.org and show me? – MysticMagicϡ Apr 23 '13 at 05:06
Where is logcat? @user2247767 – MysticMagicϡ Apr 23 '13 at 05:14
I put the logcat on there. Its a null pointer exception. @AReader – user2247767 Apr 23 '13 at 05:17
Please give me the link of logcat paste. @user2247767 – MysticMagicϡ Apr 23 '13 at 05:18
Ok. Can you paste your latest code and give me a link? @user2247767 – MysticMagicϡ Apr 23 '13 at 05:21
@user2247767 Did you debug the code? Something is null near line 130 of your activity. – MysticMagicϡ Apr 23 '13 at 05:33
I'm not very skilled at this android programming. So honestly I can debug all day and still don't know what's wrong. I appreciate all your help though @AReader – user2247767 Apr 23 '13 at 05:53

score 1 · Answer 3 · edited May 23 '17 at 11:53

1

You can also try this..It works for me...First take a time from TimePickerDialog and get it into String then apply following code..

SimpleDateFormat sdf = new SimpleDateFormat("hh:mm");
            java.util.Date d_min = null;
            java.util.Date d_max = null;
            try {
                d_min = sdf.parse(time_min);//time_min is the Minimum time in String
                d_max = sdf.parse(time_max);time_max is the Maximun time in String
                d_compare = d_max.compareTo(d_min);
            } catch (ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
 if (d_compare < 0) {
                check = 3;
                showDialog(0);
            }

You can compare current time like this..Hope this will help you.. You can also take a look at this...current time

And this...link

edited May 23 '17 at 11:53

Community

1
1

answered Apr 12 '13 at 05:43

AndiM

2,196
2
21
38

I definitely will, I'm going down the list trying all the suggestions, if they work, I will accept. Thanks again! @Meghs – user2247767 Apr 12 '13 at 07:40
You said this works for you, so did you constantly get a syntax error right after java.util.Date d_max = null; ? Wanting you to add another {? @Meghs – user2247767 Apr 12 '13 at 08:01
No it doesn't give any syntax error.Work fine in my case.If you get an error then try to use Date object. – AndiM Apr 12 '13 at 10:21

How to save a time from the time picker and compare it

3 Answers3