Android Edit text should only accepts numbers not emoticons, special icons and alphabets (By Typing or By Copying from Other apps)

Question

Created one Edit text which accepts only number, when i click on it. It shows numeric keyboard. But my problem is when I copy one emoticons from Whatsapp and paste it into my edit text box it accepts that emoticons. I want a edit text which doesn't allow to accept emoticons after copying from other apps, It should accept only numbers (by typing or by copying) Note: I don't want disable copy paste.

Screenshoot here

Answer 1

Set your EditText to have inputType number by doing this in XML:

android:inputType="number"

or programmatically by:

yourEditText.setInputType(InputType.TYPE_CLASS_NUMBER);

If you are looking to disable copying as well then you should setInputFilter to the yourEditText to filter out the non-digit characters.

Answer 2

Just use the input type as number it will not allow to paste anything.

<EditText
            android:id="@+id/edtEnterAmount"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="@dimen/enter_amount_margin"
            android:textSize="@dimen/header_three"
            android:singleLine="true"
            android:maxLength="8"
            android:inputType="numberDecimal"
            android:imeOptions="actionDone"
            android:hint="Enter amount"
            android:textColorHint="@color/gray_two" />

OR

 android:inputType="number"

OR

android:digits="0123456789"

OR

    edtEnterAmount.setOnFocusChangeListener(this);
    InputFilter filter = new InputFilter() {
        final int maxDigitsBeforeDecimalPoint=8;
        final int maxDigitsAfterDecimalPoint=2;

        @Override
        public CharSequence filter(CharSequence source, int start, int end,
                                   Spanned dest, int dstart, int dend) {
            StringBuilder builder = new StringBuilder(dest);
            builder.replace(dstart, dend, source
                    .subSequence(start, end).toString());
            if (!builder.toString().matches(
                    "(([1-9]{1})([0-9]{0,"+(maxDigitsBeforeDecimalPoint-1)+"})?)?(\\.[0-9]{0,"+maxDigitsAfterDecimalPoint+"})?"

            )) {
                if(source.length()==0)
                    return dest.subSequence(dstart, dend);
                return "";
            }

            return null;

        }
    };

    edtEnterAmount.setFilters(new InputFilter[] { filter });

Hope this help.Happy coding.

Answer 3

You could use the text Change Listener and check for the newly added character.

editText.addTextChangedListener(new TextWatcher() {

   public void afterTextChanged(Editable s) {}

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

   public void onTextChanged(CharSequence s, int start,
     int before, int count) {
     //check if all characters in CharSequence is a number
   }
});

Answer 4

You should try to use an InputFilter on yout editText:

    public static class NumericInputFilter implements InputFilter {
    public CharSequence filter(CharSequence charSequence, int start, int end, Spanned dest, int dstart, int dend) {
        StringBuilder builder = new StringBuilder();
        for (int index = 0; index < end; index++) {
            char character = charSequence.charAt(index);
            if (Character.isDigit(character)) {
                builder.append(character);
            }
        }

        boolean isAllCharacterValid = (builder.length() == end - start);
        return isAllCharacterValid ? null : builder.toString();
    }
}

You can set this input filter on your edit text by this way:

editText.setFilters(new InputFilter[]{new NumericInputFilter()});

If you use this input filter, no matter if you copy paste a character or write with keyboard, each character will be filtered, and if it's not a number it will not be shown in your edit text.

Hope it helps!

Answer 5

You can use android:inputType="number" or android:digits="0123456789"

Answer 6

try adding android:digits="0123456789" to your xml file.

Answer 7

@user3707908

Bang on !!! Its perfectly works for me........ I modified it to accpet "." also.

public static class NumericInputFilter implements InputFilter {
public CharSequence filter(CharSequence charSequence, int start,   int end, Spanned dest, int dstart, int dend) {
        StringBuilder builder = new StringBuilder();
        for (int index = 0; index < end; index++) {
            char character = charSequence.charAt(index);
            if (Character.isDigit(character)) {
                builder.append(character);
            } else if(Character.toString(character).equalsIgnoreCase(".")){
                builder.append(character);
            }
        }

        boolean isAllCharacterValid = (builder.length() == end - start);
        return isAllCharacterValid ? null : builder.toString();
    }
}