codenameone - 连接请求的postResponse中的ToastBar

ToastBar当我在代码的任何部分中使用它时，它都能正常工作，但是当我使用它显示一些消息时，即连接已完成。在postResponse的connectionRequest中使用它，它不会显示。为什么？

public boolean abc = false;
ConnectionRequest cr = new ConnectionRequest(){
    @Override
    protected void postResponse() {
        abc = true;
        //update: this toastbar is commented
        ToastBar.showMessage("Confirmation of your password is sent to your email address", FontImage.MATERIAL_MAIL_OUTLINE,2000);
    }

};
cr.setPost(true);
cr.setUrl(AllUrl.forgetPasswordUrl);
cr.setDuplicateSupported(true);
cr.setTimeout(30000);
cr.addArgument("forgetten_email", forgottonEmail);
InfiniteProgress ip = new InfiniteProgress();
Dialog d = ip.showInifiniteBlocking();
cr.setDisposeOnCompletion(d);
NetworkManager.getInstance().addToQueueAndWait(cr);

更新1：
它是在Gui生成器中创建的空白对话框。 Toastbar在这里不起作用，但是另一个对话框起作用

protected void beforeForgetPasswordDialog(Form f) {
    TextField emailTextField = new TextField();
    f.add(emailTextField);

    Button submit = new Button("Submit");

    submit.addActionListener(e -> {
        Style s = UIManager.getInstance().getComponentStyle("Label");
        String forgottenPasswordEmail = emailTextField.getText();
        if (forgottenPasswordEmail != null && !forgottenPasswordEmail.equals("")) {
            ForgetPasswordConnection fpc = new ForgetPasswordConnection();
            fpc.forgetPasswordConnectionMethod(forgottenPasswordEmail, s, StateMachine.this, f);
            forgetPasswordSuccess = fpc.abc;
            if (forgetPasswordSuccess) {
                showForm("Main", null);
            }
        } else {
         //Dialog.show(null, "Email id is empty", "ok", null);
//Dialogbox works here, but toastBar doesnt work
        //  f.addShowListener(d -> {
        //  ToastBar.showMessage("Email id is empty", FontImage.MATERIAL_MAIL_OUTLINE, 2000);
        //  });
        }
    });
    f.add(submit);
}

最佳答案

请注意，在处理对话框之前会调用该方法，因此您将在对话框上显示Toastbar，而不是父窗体。尝试保留对当前表单的引用，然后向该表单添加显示监听器，例如：

parentForm.addShowListener(e -> showMyToastbar());