Android edit text limit

Question

I have an edit text in my android application and I want to avoid from the user to enter an input when the string length in bytes reaches to the limit. It works fine in english, but not in hebrew.

The limit is 256, so when the input is in hebrew, I can insert only 128 characters. The problem is while I insert hebrew letters with punctuation. Lets say that I insert a dot, which is 1 byte, it allows me to enter more than 128 characters , even when the characters are only hebrew letters and punctuation.

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            int length = s.toString().getBytes().length;

            if (length == bytes_limit)
            {
                str = s.toString();
            }
            else if (length > bytes_limit)
            {
                input.setText(str);
                input.setSelection(str.length());
            }

        }

Update:

String example: "שלום, מה שלומך"

Update 2:

 @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            int length = s.toString().getBytes().length;

            if (length <= bytes_limit)
            {
                str = s.toString();
            }
            else if (length > bytes_limit)
            {
                input.setText(str);
                input.setSelection(str.length());
            }

        }

I don't totally understand what you're trying to acheive. Do you want to limit the edittext to 128 charcters? — SuperFrog, Nov 21 '15 at 18:05
@amirag because String.length() doesn't count bytes, it counts characters. — Elior, Nov 21 '15 at 18:08
If you use punctuation why won't you be able to insert more then 128 characters? can you post a string which doesn't behave nicely? — SuperFrog, Nov 21 '15 at 18:29

score 1 · Answer 1 · edited May 23 '17 at 11:59

1

Try specifying the charset eg

int length = s.toString().getBytes("UTF-8").length;

replacing UTF-8 with the character set that you need

See

bytes of a string in java? And

Will String.getBytes("UTF-16") return the same result on all platforms?

edited May 23 '17 at 11:59

Community

1
1

answered Nov 21 '15 at 19:39

QuantumTiger

970
1
10
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score 0 · Answer 2 · 2015-11-21T18:39:06.133

Punctuations are characters too, you write them in addition to the hebrew letter you want to write (if i am not wrong, you can add them with ALT + XXXX). They are character like any others so when you write them, you are adding characters.
A dot(.) doesn't have punctuation so it takes only one byte.

To solve it, you can remove all of the punctuatuion.

You can create a function to ignore all the punctuation:

private String removePunctuation(String s)
{
    for(int i = 0; i < s.length(); i++)
    {
        if(!(s.charAt(i) <= 'ת' && s.charAt(i) >= 'א'))
        {
        s = s.substring(0,i) + s.substring(i+1);
        }
    }
    return s;
}

note the it will delete all of the punctuation, including - and : and so on...
You can add exceptions to the condition, enabling '-' or others.

Good luck :)

Android edit text limit

2 Answers2