EditText : set number of characters programmatically

Question

I have a EditText , and I would like to restrict the number of characters which could be inputted in this EditText, and make this

Answer 1

I would implement a filter:

InputFilter filter = new InputFilter() {

   @Override
   public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
      if (source.length > 10){
       //cancel the edit or whatever
      }
   }
};
EditText editText = (EditText) findViewById(R.id.rg);
editText.setFilters(new InputFilter[] {filter});