How to change TextView text on DataChange without calling back a TextWatcher listener

Question

Consider:

TextView textView = new TextView(context);
    textView.addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                                      int after) {
        }

        @Override
        public void afterTextChanged(Editable s) {

            s.append("A");
        }
    });

If we add a TextWatcher to a TextView, and I want to append a letter to this TextView, every time the user writes a letter in it, but this keeps calling the TextWatcher Listener, so on to StackOverFlow error, so how can I append text without calling the TextWatcher Listener again?

Answer 1

Another way to avoid a stack overflow:

TextView textView = new TextView(context);
    textView.addTextChangedListener(new TextWatcher() {

        boolean editing = false;

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,int after) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            if (!editing){
               editing = true;
               s.append("A");
               editing = false;
        }

    }
});