What is the best way to apply a mask to EditText on Android?

Question

what's the best way to mask EditText on Android?
I would like my EditText to behave the way this decimal input number is here . Is there an easy way to do this?

Answer 1

You need to programmatically set the InputFilter to EditText to setFilters .

From the documentation:

InputFilters can be tied to Editables to limit the changes that can be made to them.

You can even change the user input, for example by adding the decimal point you want if I get you right.

Answer 2

I built a decimal mask for the editing text, which will automatically change the editing text to the number of decimal places needed. In bass mode, you listen to text changes and loss of focus.

  private void formatNumber() { sNumberToFormat = etNumberToFormat.getText().toString(); sDecimalMask = etDecimalMask.getText().toString(); boolean periodMask = false; String delimiter = getDelimiter(); String[] decimalMask = getsDecimalMask(); if (decimalMask.length == 1) { return; } else { if (delimiter.equalsIgnoreCase(",")) { //decimal format only currently works with dot delimiters. sDecimalMask = sDecimalMask.replace(",", "."); } DecimalFormat df = new DecimalFormat(sDecimalMask); df.setRoundingMode(RoundingMode.UP); sNumberToFormat = df.format(Float.valueOf(sNumberToFormat.replace(",", "."))); //if (maxNumber > Float.valueOf(sNumberToFormat)) { if (delimiter.equalsIgnoreCase(",")) { sNumberToFormat = sNumberToFormat.replace(".", ","); } etNumberToFormat.setText(sNumberToFormat); } } 

Full demo here .

Answer 3

I think you can use:

 android:numeric="decimal" 

on your edittext