java - 如果用户在 Edittext 中键入无效数据，如何使 AlertDialog 框保持打开状态？

Question

我有一个 alertDialog 框，要求用户输入他们的全名和电子邮件。我正在尝试验证数据，如果数据无效，我想再次显示带有错误消息的对话框(就像您在 android 中使用 Edittext 字段一样)。我将如何在 OK 按钮内执行此操作？这是我的代码:

final AlertDialog.Builder zoomDialog = new AlertDialog.Builder(new ContextThemeWrapper(activity, android.R.style.Theme_DeviceDefault_Light_Dialog));
                LayoutInflater factory = LayoutInflater.from(activity);
                final View f = factory.inflate(R.layout.name_and_email, null);

                zoomDialog.setTitle("Please enter your name and email");
                zoomDialog.setView(f);
                zoomDialog.setPositiveButton("SUBMIT", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dlg, int which) {
                        ((onFollowedListener) activity).onFollowed();


                        EditText full_name = (EditText)f.findViewById(R.id.follower_name);
                        EditText email_address = (EditText)f.findViewById(R.id.follower_email);

                        String follower_name = full_name.getText().toString();
                        String follower_email = email_address.getText().toString();
                        Validator validator = new Validator();
                        if(validator.validateFullName(follower_name) && validator.validateEmail(follower_email)){
                            Toast.makeText(activity, follower_name + " " + follower_email,
                                    Toast.LENGTH_LONG).show();
                        }else {
                            full_name.setError("** Required: Please enter your name and email");
                            full_name.requestFocus();
                            Toast.makeText(activity,  " Please enter your name and email! " ,
                                    Toast.LENGTH_LONG).show();
                            return;
                        }



                        Intent intent = new Intent(activity, RewardActivity.class);
                        intent.putExtra("type", "followers");
                        startActivity(intent);

                    }
                });

                zoomDialog.show();

每次单击提交(正)按钮时，对话框都会消失。我想让它保持打开状态，以便用户可以重新输入所需的信息，而不是返回到他们开始的地方。

如果我可以在 else 子句中调用 show() 方法，它会更容易，但它不起作用!

任何帮助将不胜感激。提前致谢。

Answer 1

我建议构建一个带有 editText 和按钮的自定义对话框，您可以注册您的 onClick 并在关闭它之前执行您想要的操作，check here more details