TextInputLayout setError() setErrorEnable()

public void afterTextChanged(Editable s) {
            if (textInputLayout.getEditText().getText().toString().length() != length) {

                textInputLayout.setError(errorInfo);
                textInputLayout.setErrorEnabled(true);
            } else {
                textInputLayout.setError(null);//必须要添加否则出现空白不隐藏的问题
                textInputLayout.setErrorEnabled(false);
            }
        }