if else statement for DateUtils

Question

So before this I already get the time difference between two times.
Now, I want to display point that will be charged for specific time duration like this: in my code, time duration named as diffResult, if diffResult less than 30 minutes, point will be charged is multiply by 1 diffResult =2, so 2*1 ,point will be charged is 2.

I wanted to use if else statement, but I got some errors. Here is my code

pointChargeBtn.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {

        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm a");
        Date date1 = null;
        try {
            date1 = simpleDateFormat.parse(timeResult.getText().toString());
        } catch (ParseException e) {
            e.printStackTrace();
        }
        Date date2 = null;
        try {
            date2 = simpleDateFormat.parse(timeResult2.getText().toString());
        } catch (ParseException e) {
            e.printStackTrace();
        }
        String diffResult= DateUtils.getRelativeTimeSpanString(date1.getTime(), date2.getTime(), DateUtils.MINUTE_IN_MILLIS).toString();

        if(diffResult < 30){

            int point = diffResult * 2;
            pointChargeBtn.setText(point);
        }


    }
});

post which errors you face? and which thing user can enter?time or date? which format? — Janvi Vyas, May 01 '18 at 09:38
In your code diffResult is a String. Operator '<' cantnot be applied to a String. — will, May 01 '18 at 09:54
since diffResult is a String so can't compare with integer in the if statement. Button to display time. The format is SimpleDateFormat and MINUTES_IN_MILLIS @Janvi Vyas — Nor Sakinah, May 02 '18 at 06:54
do I have to convert the diffResult from string to and integer? @will — Nor Sakinah, May 02 '18 at 06:56
@NorSakinah you can get hours from diffResult like so: diffResult.split(" ")[0] than cast it to an Integer like so: new Integer(diffResult.split(" ")[0]) . Now you have the hours as an int and can compare it like you are doing above — will, May 02 '18 at 07:30

Eselfar · Answer 1 · 2018-05-02T08:05:07.570

0

Your error is:

 String diffResult= DateUtils.getRelativeTimeSpanString(date1.getTime(), date2.getTime(), DateUtils.MINUTE_IN_MILLIS).toString();

        if(diffResult < 30){

            int point = diffResult * 2;
            pointChargeBtn.setText(point);
        }

diffResult is a String so you can't compare it with a number neither multiply it

EDIT

You can fix it like that:

// difference in milliseconds
// Using Math.abs is optional. It allows us to not care about which date is the latest.
int diffInMillis = Math.abs(date2.getTime() - date1.getTime()); 

// Calculates the time in minutes
int diffInMinutes = diffInMillis / (1000 * 60);

// if difference is less (strictly) than 30 minutes
if (diffInMinutes < 30){
    // TODO: Do something
}

edited May 02 '18 at 08:05

answered May 01 '18 at 13:07

Eselfar

3,759
3
23
43

how can I fix this? – Nor Sakinah May 02 '18 at 03:28
But you're aware that your app will crash if there is any parsing error? You should test if both dates are not `null` and do something if this is the case (e.g. display an error message to the user), before trying to calculate the time difference – Eselfar May 02 '18 at 08:07

if else statement for DateUtils

1 Answers1