Comma doesnt work on Samsung Android Keyboard Comma doesnt work on Samsung Android Keyboard

[Solved] [Kotlin] Comma doesnt work on Samsung Android Keyboard


In the realm of Android development, encountering unique challenges is not uncommon. One such issue has persisted, particularly for Samsung device users – the inability to use the comma key as a decimal separator when employing certain input types. This problem often arises when setting InputType.TYPE_NUMBER_FLAG_DECIMAL or InputType.TYPE_CLASS_NUMBER to an EditText, coupled with the desire to utilize a comma for the decimal separator.

The DigitsKeyListener.getInstance("0123456789.,") is a common approach to address this concern. However, Samsung keyboards seem to disable the comma key, leaving developers searching for solutions. In this article, we’ll explore two potential workarounds to overcome the comma key limitation on Samsung Android keyboards.

Solution 1: TextChangedListener Approach

Despite the ongoing technological advancements, the comma key issue persists into 2022. A practical workaround involves implementing a TextChangedListener on the EditText and checking for the last entered character. If the character matches the country-specific thousands separator, it is replaced by the corresponding decimal separator.

public class EditTextTausenderErsetzer implements TextWatcher { // ... @Override public void afterTextChanged(Editable editable) { // determine country specific separators // char thousandsSep = .., char commaSep =.. int comma_index = editable.toString().indexOf(commaSep); if (comma_index == -1) { if (editable.toString().indexOf(thousandsSep) != -1) { if (editable.toString().indexOf(thousandsSep, (editable.length() - 1)) == (editable.length() - 1)) { editable.delete(editable.length() - 1, editable.length() - 1); editable.insert(editable.length(), commaSep + ""); } } } // ... // handle other tasks like automatically setting thousands separators } // ... }

This solution is effective if your application manages thousands separators, and user customization of these separators is restricted.

Solution 2: Programmatically Replace Dot with Comma

Another approach involves programmatically replacing the dot character with a comma using a TextWatcher. This ensures that even if users input a dot from the keyboard, it is automatically replaced with a comma.

override fun afterTextChanged(editable: Editable) { // If the user input from the keyboard contains a dot, replace it with a comma if (editable.toString().contains(".")) { editable.delete(editable.toString().length - 1, editable.toString().length) editable.insert(editable.toString().length, ",") return } }


In the dynamic world of Android development, encountering unique challenges is inevitable. When faced with the comma key limitation on Samsung Android keyboards, developers can implement innovative solutions like the TextChangedListener approach or programmatically replacing dots with commas. By incorporating these strategies into your code, you can ensure a seamless user experience, overcoming keyboard-specific quirks on Samsung devices.