Decimal separator comma with numberDecimal inputType in EditText

Question

The inputType numberDecimal in EditText uses the dot   as decimal separator  In Europe it s common to use  a comma   instead  Even though my locale is set as german the decimal separator is still the   Is there a way to get the comma as decimal separator

User · Accepted Answer

A workaround  until Google fix this bug  is to use an EditText with android inputType  numberDecimal  and android digits  0123456789       Then add a TextChangedListener to the EditText with the following afterTextChanged   public void afterTextChanged Editable s        double doubleValue   0      if  s    null            try               doubleValue   Double parseDouble s toString   replace                       catch  NumberFormatException e                  Error                       Do something with doubleValue

User · Answer

For Mono Droid  solutions   decimal decimalValue   decimal Parse input Text Replace             CultureInfo InvariantCulture

User · Answer

I have a solution that allows the user to enter both the dot and the comma  if available on the keyboard   but only displays the locale default separator  In addition it will not allow the user to enter more than 1 separator  No issues with references to EditText or infinite loops  It is a combination of several answers in this thread suited to my needs  As with the accepted answer  configure the EditText accordingly  android inputType  quot numberDecimal quot  android digits  quot 0123456789   quot   Then set a custom TextWatcher on the EditText  myEditText addTextChangedListener FlexibleDecimalSeparatorTextWatcher     And include the custom TextWatcher  import android text Editable import android text SpannableStringBuilder import android text TextWatcher import android widget EditText import java text DecimalFormatSymbols         The  FlexibleDecimalSeparatorTextWatcher  allows the user to input both the comma     and dot     as a decimal separator     and will then automatically convert each entered separator into the locale default separator     If the user were to enter multiple separators - every separator but the first will be removed        To provide comma and dot support  set the  EditText  inputType to  numberDecimal  and its digits to  0123456789         class FlexibleDecimalSeparatorTextWatcher   TextWatcher   companion object       private val DECIMAL SEPARATORS   listOf               private val LOCALE DEFAULT DECIMAL SEPARATOR   DecimalFormatSymbols getInstance   decimalSeparator    override fun beforeTextChanged s  CharSequence   start  Int  count  Int  after  Int     override fun onTextChanged s  CharSequence   start  Int  before  Int  count  Int      override fun afterTextChanged s  Editable         if  s    null            val textWithConvertedSeparators   convertSeparatorsToLocaleDefault s toString            val textWithoutMultipleSeparators   removeAdditionalSeparators textWithConvertedSeparators              Make the change if required  This only triggers one additional afterTextChanged call if there were changes          if s toString      textWithoutMultipleSeparators                s replace 0  s length  SpannableStringBuilder textWithoutMultipleSeparators                             This function converts all entered separators  in  DECIMAL SEPARATORS   to the  LOCALE DEFAULT DECIMAL SEPARATOR       private fun convertSeparatorsToLocaleDefault original  String   String       var result   original     DECIMAL SEPARATORS forEach   separator - gt          if  separator    LOCALE DEFAULT DECIMAL SEPARATOR  amp  amp  result contains separator                 result   result replace separator  LOCALE DEFAULT DECIMAL SEPARATOR                      return result           Strip out all separators but the first     In this function we assume all separators are already converted to the locale default      private fun removeAdditionalSeparators original  String   String       var result   original     var separatorCount   result count   c - gt  c    LOCALE DEFAULT DECIMAL SEPARATOR       if separatorCount  gt  1               We will reverse the text so we can keep stripping the last  first in reverse  separator off          var textReversed   result reversed           val separatorRegex   Regex fromLiteral LOCALE DEFAULT DECIMAL SEPARATOR toString            while  separatorCount  gt  1                textReversed   textReversed replaceFirst separatorRegex   quot  quot               separatorCount--                      And finally we reverse it back to the original order          result   textReversed reversed             return result

User · Answer

All the other posts here had major holes in them  so here s a solution that will    Enforce commas or periods based on region  will not let you type the opposite one   If the EditText starts with some value  it replaces the correct separator as needed    In the XML    lt EditText             android inputType  numberDecimal             gt    Class variable   private boolean isDecimalSeparatorComma   false    In onCreate  find the separator used in the current locale   if  Build VERSION SDK INT  gt   Build VERSION CODES N        NumberFormat nf   NumberFormat getInstance        if  nf instanceof DecimalFormat            DecimalFormatSymbols sym     DecimalFormat  nf  getDecimalFormatSymbols            char decSeparator   sym getDecimalSeparator            isDecimalSeparatorComma   Character toString decSeparator  equals                 Also onCreate  Use this to update it if you re loading in a current value      Replace editText with commas or periods as needed for viewing String editTextValue   getEditTextValue       load your current value if  editTextValue contains       amp  amp  isDecimalSeparatorComma        editTextValue   editTextValue replaceAll               else if  editTextValue contains       amp  amp   isDecimalSeparatorComma        editTextValue   editTextValue replaceAll             setEditTextValue editTextValue      override your current value   Also onCreate  Add the Listeners  editText addTextChangedListener editTextWatcher    if  isDecimalSeparatorComma        editText setKeyListener DigitsKeyListener getInstance  0123456789        else       editText setKeyListener DigitsKeyListener getInstance  0123456789          editTextWatcher  TextWatcher editTextWatcher   new TextWatcher          Override     public void beforeTextChanged CharSequence s  int start  int count  int after            Override     public void onTextChanged CharSequence s  int start  int before  int count            Override     public void afterTextChanged Editable s            String editTextValue   s toString                Count up the number of commas and periods         Pattern pattern   Pattern compile                  Matcher matcher   pattern matcher editTextValue           int count   0          while  matcher find                  count                          Don t let it put more than one comma or period         if  count  gt  1                s delete s length  -1  s length               else                  If there is a comma or period at the end the value hasn t changed so don t update             if   editTextValue endsWith       amp  amp   editTextValue endsWith                         doSomething                                      doSomething   example  convert to standard period for data manipulation  private void doSomething         try           String editTextStr   editText getText   toString            if  isDecimalSeparatorComma                editTextStr   editTextStr replaceAll                             float editTextFloatValue   editTextStr isEmpty                     0 0f                   Float valueOf editTextStr                use editTextFloatValue       catch  NumberFormatException e            Log e TAG   Error converting String to Double

User · Answer

to get localize your input use   char sep   DecimalFormatSymbols getInstance   getDecimalSeparator      and then add   textEdit setKeyListener DigitsKeyListener getInstance  0123456789    sep      than don t forget to replace     with     so Float or Double can parse it without errors

User · Answer

You could use inputType  phone   however in that case you would have to deal with multiple   or   being present  so additional validation would be necessary

User · Answer

IMHO the best approach for this problem is to just use the InputFilter  A nice gist is here DecimalDigitsInputFilter  Then you can just   editText setInputType TYPE NUMBER FLAG DECIMAL   TYPE NUMBER FLAG SIGNED   TYPE CLASS NUMBER  editText setKeyListener DigitsKeyListener getInstance  0123456789  -    editText setFilters new InputFilter    new DecimalDigitsInputFilter 5 2

User · Answer

It s more than 8 years passed and I am surprised  this issue isn t fixed yet    I struggled with this simple issue since the most upvoted answer by  Martin lets typing multiple separators  i e  user can type in  12      12 1  21 2   Also  the second concern is that on some devices comma is not shown on the numerical keyboard  or requires multiple pressing of a dot button    Here is my workaround solution  which solves the mentioned problems and lets user typing     and      but in EditText he will see the only decimal separator which corresponds to current locale   editText apply   addTextChangedListener DoubleTextChangedListener this       And the text watcher     open class DoubleTextChangedListener private val et  EditText    TextWatcher        init           et inputType   InputType TYPE CLASS NUMBER or InputType TYPE NUMBER FLAG DECIMAL         et keyListener   DigitsKeyListener getInstance  0123456789                private val separator   DecimalFormatSymbols getInstance   decimalSeparator      override fun beforeTextChanged s  CharSequence   start  Int  count  Int  after  Int              empty             CallSuper     override fun onTextChanged s  CharSequence  start  Int  before  Int  count  Int            et run               removeTextChangedListener this DoubleTextChangedListener              val formatted   toLocalizedDecimal s toString    separator              setText formatted              setSelection formatted length              addTextChangedListener this DoubleTextChangedListener                       override fun afterTextChanged s  Editable                empty                       Formats input to a decimal  Leaves the only separator  or none   which matches  separator          Examples         1   s   12 12    separator      - gt  result   12 12         2   s   12 12    separator      - gt  result   12 12         4   s   12 12    separator      - gt  result   12 12         5   s   12 12         34       separator      - gt  result   12 1234         6   s   12 12         34       separator      - gt  result   12 1234         7   s   5  - gt  result   5              private fun toLocalizedDecimal s  String  separator  Char   String           val cleared   s replace                   val splitted   cleared split      filter   it isNotBlank             return when  splitted size                0 - gt  s             1 - gt  cleared replace      separator  replaceAfter separator                  2 - gt  splitted joinToString separator toString                else - gt  splitted 0                       plus separator                       plus splitted subList 1  splitted size - 1  joinToString

User · Answer

I can confirm that the fixes proposed do not work on Samsung IMEs  at least on S6 and S9  and maybe LG  They still show a dot as decimal separator regardless of locale  Switching to Google s IME fixes this but is hardly an option for most developers   It also has not been fixed in Oreo for these keyboards since it is a fix that Samsung and or LG have to do and then to push even to their ancient handsets   I have instead forked the number-keyboard project and added a mode where it behaves like an IME  fork  See the project sample for details  This has worked quite well for me and is similar to many of the  PIN entry  fake IMEs you see in banking apps

User · Answer

You could do the following   DecimalFormatSymbols d   DecimalFormatSymbols getInstance Locale getDefault     input setFilters new InputFilter     new DecimalDigitsInputFilter 5  2      input setKeyListener DigitsKeyListener getInstance  0123456789    d getDecimalSeparator        And then you could use an input filter       public class DecimalDigitsInputFilter implements InputFilter    Pattern mPattern   public DecimalDigitsInputFilter int digitsBeforeZero  int digitsAfterZero        DecimalFormatSymbols d   new DecimalFormatSymbols Locale getDefault         String s          d getDecimalSeparator        mPattern   Pattern compile   0-9  0      digitsBeforeZero - 1             s     0-9  0      digitsAfterZero - 1                s              Override public CharSequence filter CharSequence source  int start  int end  Spanned dest  int dstart  int dend         Matcher matcher   mPattern matcher dest       if   matcher matches            return         return null

User · Answer

Simple solution  make a custom control   this is made in Xamarin android but should port easily to java   public class EditTextDecimalNumber EditText       readonly string  numberFormatDecimalSeparator       public EditTextDecimalNumber Context context  IAttributeSet attrs    base context  attrs                InputType   InputTypes NumberFlagDecimal          TextChanged    EditTextDecimalNumber TextChanged           numberFormatDecimalSeparator   System Threading Thread CurrentThread CurrentUICulture NumberFormat NumberDecimalSeparator           KeyListener   DigitsKeyListener GetInstance   0123456789  numberFormatDecimalSeparator                private void EditTextDecimalNumber TextChanged object sender  TextChangedEventArgs e                int noOfOccurence   this Text Count x   gt  x ToString       numberFormatDecimalSeparator           if  noOfOccurence  gt  2                        int lastIndexOf   this Text LastIndexOf  numberFormatDecimalSeparator StringComparison CurrentCulture               if  lastIndexOf  -1                                this Text   this Text Substring 0  lastIndexOf                   this SetSelection this Text Length

User · Answer

Following Code Currency Mask for EditText    123 125 155   Xml Layout     lt EditText     android inputType  numberDecimal      android layout height  wrap content      android layout width  200dp      android digits  0123456789       gt    Code  EditText testFilter     testFilter addTextChangedListener  new TextWatcher             boolean isEdiging           Override public void onTextChanged CharSequence s  int start  int before  int count               Override public void beforeTextChanged CharSequence s  int start  int count  int after                Override public void afterTextChanged Editable s                if isEdiging  return              isEdiging   true               String str   s toString   replaceAll       d                      double s1   Double parseDouble str                NumberFormat nf2   NumberFormat getInstance Locale ENGLISH                 DecimalFormat nf2  applyPattern                               s replace 0  s length    nf2 format s1                 isEdiging   false

User · Answer

Android has a built in number formatter    You can add this to your EditText to allow decimals and commas   android inputType  numberDecimal  and android digits  0123456789     Then somewhere in your code  either when user clicks save or after text is entered  use a listener        Format the number to the appropriate double try        Number formatted   NumberFormat getInstance   parse editText getText   toString         cost   formatted doubleValue      catch  ParseException e        System out println  Error parsing cost string     editText getText   toString         cost   0 0

User · Answer

I don t know why your answers are so complicated  If there s a bug in SDK you must override it or go around   I have chosen the second way to solve that problem  If you format your string as Locale ENGLISH and then put it to the EditText  even as an empty string   Example   String format Locale ENGLISH    6f   yourFloatNumber    Chasing that solution your result are compatible with the shown keyboard  Then float and double numbers work in typical for programming languages manner with dot instead of comma

User · Answer

Martins answer won t work if you are instantiating the EditText programmatically  I went ahead and modified the included DigitsKeyListener class from API 14 to allow for both comma and period as decimal separator   To use this  call setKeyListener   on the EditText  e g      Don t allow for signed input  minus   but allow for decimal points editText setKeyListener  new MyDigitsKeyListener  false  true        However  you still have to use Martin s trick in the TextChangedListener where you replace commas with periods  import android text InputType  import android text SpannableStringBuilder  import android text Spanned  import android text method NumberKeyListener  import android view KeyEvent   class MyDigitsKeyListener extends NumberKeyListener                   The characters that are used                 see KeyEvent getMatch         see  getAcceptedChars             private static final char     CHARACTERS   new char               new char      0    1    2    3    4    5    6    7    8    9             new char      0    1    2    3    4    5    6    7    8    9    -             new char      0    1    2    3    4    5    6    7    8    9                       new char      0    1    2    3    4    5    6    7    8    9    -                           private char   mAccepted      private boolean mSign      private boolean mDecimal       private static final int SIGN   1      private static final int DECIMAL   2       private static MyDigitsKeyListener   sInstance   new MyDigitsKeyListener 4         Override     protected char   getAcceptedChars             return mAccepted                        Allocates a DigitsKeyListener that accepts the digits 0 through 9              public MyDigitsKeyListener             this false  false                         Allocates a DigitsKeyListener that accepts the digits 0 through 9         plus the minus sign  only at the beginning  and or decimal point         only one per field  if specified              public MyDigitsKeyListener boolean sign  boolean decimal            mSign   sign          mDecimal   decimal           int kind    sign   SIGN   0     decimal   DECIMAL   0           mAccepted   CHARACTERS kind                         Returns a DigitsKeyListener that accepts the digits 0 through 9              public static MyDigitsKeyListener getInstance             return getInstance false  false                         Returns a DigitsKeyListener that accepts the digits 0 through 9         plus the minus sign  only at the beginning  and or decimal point         only one per field  if specified              public static MyDigitsKeyListener getInstance boolean sign  boolean decimal            int kind    sign   SIGN   0     decimal   DECIMAL   0            if  sInstance kind     null              return sInstance kind            sInstance kind    new MyDigitsKeyListener sign  decimal           return sInstance kind                         Returns a DigitsKeyListener that accepts only the characters        that appear in the specified String   Note that not all characters        may be available on every keyboard              public static MyDigitsKeyListener getInstance String accepted               TODO  do we need a cache of these to avoid allocating           MyDigitsKeyListener dim   new MyDigitsKeyListener             dim mAccepted   new char accepted length             accepted getChars 0  accepted length    dim mAccepted  0            return dim             public int getInputType             int contentType   InputType TYPE CLASS NUMBER          if  mSign                contentType    InputType TYPE NUMBER FLAG SIGNED                    if  mDecimal                contentType    InputType TYPE NUMBER FLAG DECIMAL                    return contentType              Override     public CharSequence filter CharSequence source  int start  int end                                 Spanned dest  int dstart  int dend            CharSequence out   super filter source  start  end  dest  dstart  dend            if  mSign    false  amp  amp  mDecimal    false                return out                     if  out    null                source   out              start   0              end   out length                       int sign   -1          int decimal   -1          int dlen   dest length                           Find out if the existing text has  -  or     characters                       for  int i   0  i  lt  dstart  i                  char c   dest charAt i                if  c     -                     sign   i                else if  c           c                           decimal   i                                  for  int i   dend  i  lt  dlen  i                  char c   dest charAt i                if  c     -                     return           Nothing can be inserted in front of a  -                 else if  c            c                           decimal   i                                                 If it does  we must strip them out from the source             In addition   -  must be the very first character             and nothing can be inserted before an existing  -              Go in reverse order so the offsets are stable                       SpannableStringBuilder stripped   null           for  int i   end - 1  i  gt   start  i--                char c   source charAt i               boolean strip   false               if  c     -                     if  i    start    dstart    0                        strip   true                    else if  sign  gt   0                        strip   true                    else                       sign   i                                  else if  c           c                           if  decimal  gt   0                        strip   true                    else                       decimal   i                                               if  strip                    if  end    start   1                        return         Only one character  and it was stripped                                     if  stripped    null                        stripped   new SpannableStringBuilder source  start  end                                      stripped delete i - start  i   1 - start                                    if  stripped    null                return stripped            else if  out    null                return out            else               return null

User · Answer

I decided to change comma to dot only while editing  Here is my tricky and relative simple workaround        editText setOnFocusChangeListener new View OnFocusChangeListener              Override         public void onFocusChange View v  boolean hasFocus                EditText editText    EditText  v               String text   editText getText   toString                if  hasFocus                    editText setText text replace                           else                   if   text isEmpty                          Double doubleValue   Double valueOf text replace                                 editText setText someDecimalFormatter format doubleValue                                                        someDecimalFormatter will use comma or dot depends on Locale

User · Answer

I think this solution is less complex than the others written here    lt EditText     android inputType  numberDecimal      android digits  0123456789     gt    This way when you press the     in the soft keyboard nothing happens  only numbers and comma are allowed

User · Answer

A variation on the  digit  solutions offered here   char separator   DecimalFormatSymbols getInstance   getDecimalSeparator    input setKeyListener DigitsKeyListener getInstance  0123456789    separator      Taking into account the locale separator

User · Answer

My solution is    In main activity   char separator  DecimalFormatSymbols getInstance   getDecimalSeparator    textViewPitchDeadZone setKeyListener DigitsKeyListener getInstance  0123456789    separator    In xml file    android imeOptions  flagNoFullscreen  android inputType  numberDecimal    and I took the double in the editText as a String

User · Answer

My fix for KOTLIN I came across the same bug  which i fixed with  val separator   DecimalFormatSymbols getInstance   decimalSeparator mEditText keyListener   DigitsKeyListener getInstance  quot 0123456789 separator quot    and this works quite fine   BUT  on Samsung Keyboards  the separator is NOT shown  so you cannot type in decimal numbers  so i had to fix this issue with checking  if Samsung Keyboard is used      val x   Settings Secure getString getContentResolver    Settings Secure DEFAULT INPUT METHOD       if  x toLowerCase   contains  quot samsung quot           But then you still have the  quot   quot  as decimal separator  Therefore you have to replace the dot with comma  if the separator is comma  val separator  Char   DecimalFormatSymbols getInstance   decimalSeparator     if  separator                mEditText addTextChangedListener object   TextWatcher                           override fun beforeTextChanged s  CharSequence   start  Int  count  Int  after  Int    Unit                              override fun onTextChanged s  CharSequence   start  Int  before  Int  count  Int    Unit                              override fun afterTextChanged s  Editable                                      if   s isNullOrEmpty                                                                           if  s toString   contains  quot   quot                                              val replaced   s toString   replace      separator                                          mEditText setText replaced                                          mEditText setSelection replaced length                                                                                                                                                                                But then you have to check that nobody types more  quot   quot  in the EditTextfield  This can be done with a Regex  My whole solution  val x   Settings Secure getString getContentResolver    Settings Secure DEFAULT INPUT METHOD     if  x toLowerCase   contains  quot samsung quot               val Number REGEX  Pattern    Pattern compile  quot    1-9         1  0-9  0 10     quot            val separator  Char   DecimalFormatSymbols getInstance   decimalSeparator          if  separator                       mEditText addTextChangedListener object   TextWatcher                   override fun beforeTextChanged s  CharSequence   start  Int  count  Int  after  Int    Unit                  override fun onTextChanged s  CharSequence   start  Int  before  Int  count  Int    Unit                  override fun afterTextChanged s  Editable                          if   s isNullOrEmpty                              val matcherMail   Number REGEX matcher s toString                            if   matcherMail matches                                  val length  Int   s length                              s delete length - 1  length                             else                               if  s toString   contains  quot   quot                                      val replaced   s toString   replace      separator                                  mEditText setText replaced                                  mEditText setSelection replaced length                                                                                                                                  else           val separator   DecimalFormatSymbols getInstance   decimalSeparator         mEditText keyListener   DigitsKeyListener getInstance  quot 0123456789 separator quot                  xml file    lt com google android material textfield TextInputEditText         android id  quot   id tEditText quot          android layout width  quot match parent quot          android layout height  quot wrap content quot          android hint  quot Input quot          android inputType  quot numberDecimal quot          android imeOptions  quot actionDone quot   gt   If you want to use the number  make sure to get the right format  val x   NumberFormat getInstance   parse mEditText text toString    toDouble

User · Answer

you could use the following for different locales  private void localeDecimalInput final EditText editText        DecimalFormat decFormat    DecimalFormat  DecimalFormat getInstance Locale getDefault         DecimalFormatSymbols symbols decFormat getDecimalFormatSymbols        final String defaultSeperator Character toString symbols getDecimalSeparator          editText addTextChangedListener new TextWatcher               Override         public void beforeTextChanged CharSequence s  int start  int count  int after                         Override         public void onTextChanged CharSequence s  int start  int before  int count                         Override         public void afterTextChanged Editable editable                if editable toString   contains defaultSeperator                   editText setKeyListener DigitsKeyListener getInstance  0123456789                 else                 editText setKeyListener DigitsKeyListener getInstance  0123456789    defaultSeperator

User · Answer

This is a known bug in the Android SDK  The only workaround is to create your own soft keyboard  You can find an example of implementation here

User · Answer

You can use the following workaround to also include comma as a valid input -  Through XML    lt EditText     android inputType  number      android digits  0123456789      gt    Programmatically   EditText input   new EditText THE CONTEXT   input setKeyListener DigitsKeyListener getInstance  0123456789         In this way Android system will show the numbers  keyboard and allow the input of comma  Hope this answers the question

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