Disable Button when Edit Text Fields empty

Question

I have two text fields and a Button. I want to disable the Button unless both EditText-Fields are not empty. I tried many solutions here at stackoverflow, but they don\'t wo

Answer 1

My way was:

1. button setEnabled(false)

2. I used TextWatcher to listen for text change and update status of button in afterTextChanged function

Here is my code:

TextWatcher tw = new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
    }

    @Override
    public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
    }

    @Override
    public void afterTextChanged(Editable editable) {
        updateSignInButtonState();
    }
};

public void updateSignInButtonState() {
    btnSubmit.setEnabled(edUsername.getText().length() > 0 &&
            edPassword.getText().length() > 0);
}