void setErrorMessage(String message) {
        if ( textviewError_!=null ) {
            handler_.post(new Runnable() {
                @Override
                public void run() {
                    textviewError_.setText(message_);
                }
                String message_;
                public Runnable setMessate(String message) {
                    message_ = message;
                    return this;
                }
            }.setMessate(message));
        }
    }