Alternative way to getting numeric value from edittext

Question

I'm currently using the following line of code to get the value from an edittext:

          double value = Double.valueOf(editText.getText().toString().trim());

This is inside an onclick method. The app I'm developing crashes every time that button is clicked, and I've commented every possible variation of lines in the method and figured out that it's this line of code that causes it to crash. I have no idea why this is happening, but is there an alternative to the same? Parsing it as double didn't work either.

This code works fine on its own. Please show the stacktrace to the crash — OneCricketeer, Nov 05 '19 at 06:21
You might be getting `NumberFormatException` because you're trying to convert empty string to Double value. — Jeel Vankhede, Nov 05 '19 at 06:22
you need first check your edit text value that it should not be empty or blank spaces or invalid number — Vivek Mishra, Nov 05 '19 at 06:24
Refer this [How can I prevent java.lang.NumberFormatException: For input string: “N/A”?](https://stackoverflow.com/q/18711896/7666442) — AskNilesh, Nov 05 '19 at 06:25

Chirag Savsani · Answer 1 · 2019-11-05T06:44:56.897

1

Double.parseDouble(String) returns a primitive double type.

Double.valueOf(String) returns a wrapper object of type Double

So you can do it following way,

String strValue = editText.getText().toString().trim();

Check Value is empty or not.

if(!strValue.isEmpty()) {
      double value = Double.parseDouble(strValue);
}

OR

if(!strValue.isEmpty()) {
      Double value = Double.valueOf(strValue);
}

edited Nov 05 '19 at 06:44

answered Nov 05 '19 at 06:22

Chirag Savsani

6,020
4
38
74

This still throws an exception on empty strings – OneCricketeer Nov 05 '19 at 06:23
Yah. Developer has to check if it is not empty. – Chirag Savsani Nov 05 '19 at 06:24
An EditText cannot have a null string, though – OneCricketeer Nov 05 '19 at 06:24
Sorry I mean to say Empty. – Chirag Savsani Nov 05 '19 at 06:29

Atif AbbAsi · Accepted Answer · 2019-11-05T06:53:22.797

0

that crash is bc you are usng trim on null or empty value. try adding check

 double value=0.0;
    if(null!=editText && null!=editText.getText() && editText.getText().length() > 0 && !TextUtils.isEmpty(editText.getText().toString())){
     value = Double.parseDouble(editText.getText().toString().trim());
    }else{
    editText.setError("Your message");
    }

edited Nov 05 '19 at 06:53

answered Nov 05 '19 at 06:24

Atif AbbAsi

5,633
7
26
47

What if the EditText itself is null? – OneCricketeer Nov 05 '19 at 06:25
You might also want to try `TextUtils.isEmpty` – OneCricketeer Nov 05 '19 at 06:25

score 0 · Answer 3 · answered Nov 05 '19 at 06:38

0

try this:

  String s=editText.getText().toString().trim();

    if(!s.equalsIgnoreCase("")&& !s.equalsIgnoreCase(null)&& !s.isEmpty()) {
        Double value = Double.parseDouble(s);

    }else{
//alert
   }

answered Nov 05 '19 at 06:38

MurugananthamS

2,395
4
20
49

score 0 · Answer 4 · answered Nov 05 '19 at 06:45

Recommend

Use the isEmpty method of TextUtils class.

double value;
if(!TextUtils.isEmpty(editText.getText().toString().trim())){
    value = Double.parseDouble(editText.getText().toString().trim());
}

Implementation of isEmpty Method of TextUtils :

public static boolean isEmpty(@Nullable CharSequence str) {
    if (str == null || str.length() == 0) {
        return true;
    } else {
        return false;
    }
}

Alternative way to getting numeric value from edittext

4 Answers4