CODEWITHSUNDEEP
androidandroid-edittext
Dude
Dude

Reputation: 173

How to get when comma "," is entered in Edit text in android

How would I get that when Comma "," is entered in Edit text. Here what I am doing

newCategryET.addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence returnedResult, int start,
                int before, int count) {

            String result = returnedResult.toString();
            String result2 = result.substring(result.length() - 2,
                    result.length() - 1);
            if (result2.equals(",")) {
                addCategoryToLayout(result.substring(0, result.length() - 1));
                newCategryET.setText("");
                return;

            }
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {

        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });

I want to add the text of my Edit text to a layout whenever Comma is pressed But I am getting array index out of bound exception.

Any Help

Here is my logcat error -

java.lang.StringIndexOutOfBoundsException: length=1; regionStart=-1; regionLength=1

Upvotes: 0

Views: 1694

Answers (4)

Anu
Anu

Reputation: 1914

Try this way, hope this will work

            @Override
            public void onTextChanged(CharSequence returnedResult, int start,
                    int before, int count) {

                    if (count > 0) {                    

                    String s1 = "" + result.charAt(start);
                    if (s1.toString().equals(",")) {
                        addCategoryToLayout(result.substring(0, result.length() - 1));
                    newCategryET.setText("");
                    return;
                    }
                }
            }

Upvotes: 0

Gintas_
Gintas_

Reputation: 5030

@Override
public void onTextChanged(CharSequence returnedResult, int start, int before, int count)
{
    String result = returnedResult.toString();
    if(result.length() == 0) return;
    //if(result.contains(",")) // another method
    if(result.charAt(result.length() - 1).equals(",") // last character is ','
    {
        // comma is entered
        addCategoryToLayout(result.substring(0, result.length() - 1));
        newCategryET.setText("");
    }
}

Upvotes: 0

Elemental
Elemental

Reputation: 7521

Consider the case when the very first character is entered (as q):

  • Result evaluates to 'Q'
  • Result.Length() evaluates to 1
  • Result.substring(result.length() - 2,result.length() - 1) evaluates to Result.substring(-1,0)

Trying to take this subtsring starting at position -1 causes your exception.

There are several easier solutions to this problem - such as checking String.contains(",") or String.IndexOf()

Upvotes: 2

Pramod Yadav
Pramod Yadav

Reputation: 2326

you can use the string's contains method to check that the string contains comma or not

String.contains(",")

and then you use string tokenizer to split the string whenever the comma appears

Upvotes: 2

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