Question

I would like to retrieve user input via an Alert Dialog… is there any way to make it so that the user cannot press Ok if the EditText is blank? I mean require that he type something in?

Answer 1

you can use textchangeListener to achieve this in afterTextChange method check text of editText, and according to length set enable or disable Ok button, as follows:

editText.addTextChangedListener(new TextWatcher() {
                        public void afterTextChanged(Editable s) {
                                //XXX do something
                                if(editText.getText().length()>0)
                                     btnOk.setEnabled(true);
                                else
                                     btnOk.setEnabled(false);
                        }
                        public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
                                //XXX do something
                        }
                    public void onTextChanged(CharSequence s, int start, int before, int count) {
                            //XXX do something
                    }
    });