Android : How to set acceptable numbers and characters in EditText?

Question

I have to set acceptable characters "0123456789" and "semicolon" in the EditText. Below is the code I'm using.

android:digits="0123456789;"
android:inputType="number|text

The problem with that implementation is in HTC phones, semicolon can't be entered but in Samsung and Sony Ericsson, semicolon can be entered. Another problem is when I entered semicolon in Samsung and Sony Ericsson, semicolon can't be deleted. Is there any missing property in the above code? Thanks in advance.

[This](http://stackoverflow.com/a/6082975/489852) looks a nice way to do it — Atul Goyal, Nov 08 '12 at 07:13

score 27 · Accepted Answer · edited Jun 19 '15 at 17:46

Android provides an easy way to edit text fields by modifying the layout xml and adding an android:inputType="text". This lets you easily create some basic validations like numbers, decimal, phone or emails. But there's no parameter for alphanumeric (i.e. no special characters). To do this, you need to use an input filter like below and set the fields you want to validate with that filter in code. This input filter

 InputFilter alphaNumericFilter = new InputFilter() {   
     @Override  
     public CharSequence filter(CharSequence arg0, int arg1, int arg2, Spanned arg3, int arg4, int arg5)  
     {  
         for (int k = arg1; k < arg2; k++) {   
             if (!Character.isLetterOrDigit(arg0.charAt(k))) {   
             return ""; 
             }   //the first editor deleted this bracket when it is definitely necessary...
         }
         return null;
     }  
 };   
 mFirstName.setFilters(new InputFilter[]{ alphaNumericFilter});

Why does this deletes chars by pressing space in some devices? — Ricardo, Nov 24 '16 at 16:05
To avoid deletion of characters I changed my edittext input type as `textVisiblePassword`. — Mahendran Sakkarai, Jun 22 '17 at 07:01

score 1 · Answer 2 · edited May 23 '17 at 12:24

1

To limit what the user can enter as they type use a TextWatcher, discussed in this question Android: How can I validate EditText input?.

Better yet: Allow only selected charcters based on regex in an EditText

edited May 23 '17 at 12:24

Community

1
1

answered Apr 27 '12 at 03:58

Sam

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score 1 · Answer 3 · answered Apr 27 '12 at 04:17

1

The solution is to modify the these fields: http://developer.android.com/reference/android/widget/TextView.html#attr_android:inputMethod

Set the InputMethod of the EditText so that you can properly get what you need.

answered Apr 27 '12 at 04:17

JoxTraex

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score 0 · Answer 4 · edited Mar 15 '15 at 12:09

0

Here is the regular expression

Pattern mPattern = Pattern.compile("^([1-9][0-9]{0,2})?(\\.[0-9]?)?$");
Matcher matcher = mPattern.matcher(loginNameString.toString());               
if(!matcher.find())
{
    //TODO
}

edited Mar 15 '15 at 12:09

shankar.parshimoni

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answered Mar 15 '15 at 11:25

chris10169

1

Android : How to set acceptable numbers and characters in EditText?

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