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

Setting new text#1

CharSequence text = edittext.getText();
edittext.setText(text.subSequence(0, text.length() - 1));

Setting new text#2

CharSequence text = v.getText();
edittext.setText("");
edittext.append(text, 0, text.length() - 1);

Deleting editable

int length = editText.getText().length();
if (length > 0) {
    editText.getText().delete(length - 1, length);
}

Subsequencing editable

int length = editText.getText().length();
if (length > 0) {
    editText.getText().subSequence(0, length - 1);
}

Deleting by dispatching delete key event.

edittext.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL));