Android EditText - Delete the last letter with a button

Question

I have to buttons that writes A and B to an edittext. If there is something in the edittext how can I delete the last letters with the \"Del\" button? My layout:

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Answer 1

Yes you can create an onClickListener and just get the text from edit text and delete the last character.

Button delete = (Button) findViewById(R.id.buttondel);
if( delete != null ) {
   delete.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick() {
         String textString = editText.getText().toString();
         if( textString.length() > 0 ) {
            editText.setText(textString.substring(0, textString.length() - 1 ));
            editText.setSelection(editText.getText().length());//position cursor at the end of the line
         }
      }
   });
}

Edit: Also don't forget to check the string length is greater than 0 before doing this in the event a or b hasn't been pressed when the user hits delete.