Get EditTextValue and parse it into a decimal with only one digit for integer part

Question

I'm having an issue when I get a whole number from an EditText and try to change that to a decimal so I can use it for calculations. Could someone explain how to do this?

For Example. if someone was to enter 120 into the EditText and I got the integer from it, how would I then change that integer of 120 into 1.20 and continue calculations with it?

Thanks!!

score 1 · Answer 1 · edited May 23 '17 at 12:23

1

int three = Integer.parse("3");

I know you can use this to parse a string into an integer, there is probably a parse method in double aswell!

Check this also : Convert a String to Double - Java

+1 to anthony for answering 1 minute before me haha

edited May 23 '17 at 12:23

Community

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answered Mar 29 '14 at 20:30

Tascalator

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I would also for the user to input decimal by adding the inputType attribute and set it to numberDecimal. and put the previous statement in a try catch because it might throw : java.lang.NumberFormatException. – Hannoun Yassir Mar 29 '14 at 20:41
check my answer i added a try catch – Anthony Raymond Mar 29 '14 at 20:44
thanks but now how to I change it into a decimal to do further calculations with – user3476638 Mar 29 '14 at 20:47

Anthony Raymond · Accepted Answer · 2014-03-29T21:15:16.857

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EditText myEditText = (EditText)findViewById(R.id.YOUR_EDIT_TEXT_ID);
String numberAsString = myEditText.getText().toString();

double myDecimal;
try {
    myDecimal = Double.parseDouble(numberAsString);
    if (myDecimal >= 10)
    {
        int digits = 1 + (int)Math.floor(Math.log10(myDecimal));
        myDecimal = myDecimal / ((Math.pow((double)10, ((double)digits) - 1)));
        System.out.println(myDecimal);
    }
} catch (NumberFormatException e) {
    //handle exeption
    e.printStackTrace();
}

edited Mar 29 '14 at 21:15

answered Mar 29 '14 at 20:31

Anthony Raymond

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thanks but now how to I change it into a decimal to do further calculations with – user3476638 Mar 29 '14 at 20:48
Well, now, variable myDecimal contains your double, you can do wathever math calculation with it. If your aim is to change the format into the EditText, i'm affraid there is no way to do that – Anthony Raymond Mar 29 '14 at 20:50
I mean, if someone was to enter 120 into myEditText how would I then change that into 1.20 ? – user3476638 Mar 29 '14 at 20:52
faster and better way. (not sure about the -1) you'll need to check this by yourself – Anthony Raymond Mar 29 '14 at 21:02
This was a great help thanks :) I tried to divide it by 100 before all this but that didn't work but you have made it work :) so thanks :) – user3476638 Mar 29 '14 at 21:33

score 1 · Answer 3 · answered Mar 29 '14 at 20:32

1

You need to get the contents from your EditText as a string, and from there you can parse it into an integer. This is done like so:

 int wholeNum = Integer.parseInt(yourEditText.getText().toString());

answered Mar 29 '14 at 20:32

Noob

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Get EditTextValue and parse it into a decimal with only one digit for integer part

3 Answers3