How to programmatically set maxLength in Android TextView?

Question

I would like to programmatically set maxLength property of TextView as I don't want to hard code it in the layout. I can't see any set method related to maxLength.

Can anyone guide me how to achieve this?

score 380 · Accepted Answer · edited May 01 '14 at 12:58

380

Should be something like that. but never used it for textview, only edittext :

TextView tv = new TextView(this);
int maxLength = 10;
InputFilter[] fArray = new InputFilter[1];
fArray[0] = new InputFilter.LengthFilter(maxLength);
tv.setFilters(fArray);

edited May 01 '14 at 12:58

Sanket Kachhela

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answered Mar 17 '10 at 12:41

Sephy

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123

Building upon that, it might be much cleaner to go: tv.setFilters( new InputFilter[] { new InputFilter.LengthFilter(10) } ); – Mark D May 15 '12 at 20:38
47

Couldn't just say "maxLength()".. no, no, no.. that would be too easy. they had to make abstract it.. yay! – angryITguy Jul 15 '16 at 06:11
3

But this will reset your previous filters, no ? – crgarridos Oct 11 '17 at 09:46
22

With Kotlin you can make it cleaner: editText.filters = arrayOf(InputFilter.LengthFilter(10)) – Elvis Chidera Dec 09 '17 at 06:54
6

`editText.filters = arrayOf(*editText.filters, InputFilter.LengthFilter(10))` keep old filters with kotlin – Peter Samokhin Jul 26 '19 at 00:24

IntelliJ Amiya · Answer 2 · 2016-01-12T07:48:27.353

90

Try this

int maxLengthofEditText = 4;    
editText.setFilters(new InputFilter[] {new InputFilter.LengthFilter(maxLengthofEditText)});

edited Jan 12 '16 at 07:48

answered Jun 26 '15 at 13:49

IntelliJ Amiya

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This works for me, but in Android 5.1 you can still continue to type letters, the are yust "invisible" in the inputfield. But they are shown in the text proposal. And when you try to delete letters on the end. – Radon8472 Dec 03 '15 at 15:14
13

This is not "another way" this is the short version of the first answer, same way. – Ninja Coding Jan 11 '16 at 17:22

score 24 · Answer 3 · answered Sep 29 '17 at 18:05

24

For those of you using Kotlin

fun EditText.limitLength(maxLength: Int) {
    filters = arrayOf(InputFilter.LengthFilter(maxLength))
}

Then you can just use a simple editText.limitLength(10)

answered Sep 29 '17 at 18:05

Kevin

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why not use setMaxLength as function name ? you could apply this to textview also... thanks +1 :) – crgarridos Oct 11 '17 at 09:42
I have other methods that follow this pattern: limitDecimalPlaces, limitNumberOnly, limitAscii to go along with limitLength. – Kevin Oct 13 '17 at 18:37
1

filters = filters.plus(InputFilter.LengthFilter(max)) Don't overwrite existing ones – ersin-ertan Oct 30 '18 at 04:20

score 22 · Answer 4 · edited Nov 08 '16 at 05:57

22

Easy way limit edit text character :

EditText ed=(EditText)findViewById(R.id.edittxt);
ed.setFilters(new InputFilter[]{new InputFilter.LengthFilter(15)});

edited Nov 08 '16 at 05:57

IntelliJ Amiya

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answered Sep 20 '16 at 13:31

Farid Ahmed

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CoolMind · Answer 5 · 2020-01-09T08:01:18.803

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As João Carlos said, in Kotlin use:

editText.filters += InputFilter.LengthFilter(10)

See also https://stackoverflow.com/a/58372842/2914140 about some devices strange behaviour.

(Add android:inputType="textNoSuggestions" to your EditText.)

edited Jan 09 '20 at 08:01

answered Oct 10 '19 at 15:25

CoolMind

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Its create bug if you want to change length latter like in my case I change MaxLength from 10 to 20, but as in code we add filter its remain set MaxLength 10 bcus now in array we have 10,20 two max lengths. – Nikhil Jun 29 '20 at 14:35
@Nikhil, agree with you, thanks! Yes, in this case we should first remove one filter (`LengthFilter(10)`) and then add another (`LengthFilter(20)`). – CoolMind Jun 29 '20 at 15:49

Fatih Santalu · Answer 6 · 2020-02-27T08:38:03.137

8

For Kotlin and without resetting previous filters:

fun TextView.addFilter(filter: InputFilter) {
  filters = if (filters.isNullOrEmpty()) {
    arrayOf(filter)
  } else {
    filters.toMutableList()
      .apply {
        removeAll { it.javaClass == filter.javaClass }
        add(filter)
      }
      .toTypedArray()
  }
}

textView.addFilter(InputFilter.LengthFilter(10))

edited Feb 27 '20 at 08:38

answered Nov 14 '18 at 08:47

Fatih Santalu

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score 3 · Answer 7 · answered Mar 20 '20 at 10:47

I made a simple extension function for this one

/**
 * maxLength extension function makes a filter that 
 * will constrain edits not to make the length of the text
 * greater than the specified length.
 * 
 * @param max
 */
fun EditText.maxLength(max: Int){
    this.filters = arrayOf<InputFilter>(InputFilter.LengthFilter(max))
}

editText?.maxLength(10)

score 1 · Answer 8 · answered Sep 03 '20 at 11:44

1

My solution for SWIFT 5

editText.filters = arrayOf<InputFilter>(InputFilter.LengthFilter(123))

answered Sep 03 '20 at 11:44

Serhii Stakhiv

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score 0 · Answer 9 · answered Feb 09 '18 at 05:25

     AlertDialog.Builder builder = new AlertDialog.Builder(this);
                    builder.setTitle("Title");


                    final EditText input = new EditText(this);
                    input.setInputType(InputType.TYPE_CLASS_NUMBER);
//for Limit...                    
input.setFilters(new InputFilter[] {new InputFilter.LengthFilter(3)});
                    builder.setView(input);

score 0 · Answer 10 · answered Jun 20 '19 at 12:28

0

best solution i found

textView.setText(text.substring(0,10));

answered Jun 20 '19 at 12:28

saigopi.me

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It won't limit a length of `EditText`, but cuts off a text after 10th symbol (one time). – CoolMind Oct 10 '19 at 15:19

score 0 · Answer 11 · answered Dec 09 '19 at 05:45

To keep the original input filter, you can do it this way:

InputFilter.LengthFilter maxLengthFilter = new InputFilter.LengthFilter(100);
        InputFilter[] origin = contentEt.getFilters();
        InputFilter[] newFilters;
        if (origin != null && origin.length > 0) {
            newFilters = new InputFilter[origin.length + 1];
            System.arraycopy(origin, 0, newFilters, 0, origin.length);
            newFilters[origin.length] = maxLengthFilter;
        } else {
            newFilters = new InputFilter[]{maxLengthFilter};
        }
        contentEt.setFilters(newFilters);

How to programmatically set maxLength in Android TextView?

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