验证日期+时间选择器

Question

我正在完善我的应用程序并努力确保它不会被破坏。我有一个 CreateLine 页面，最后有一个保存按钮。我正在做测试并试图通过在选择日期或时间选择器之前单击“保存”按钮来破坏我的应用程序，然后应用程序崩溃。基本上我想要发生的是它显示一个警报对话框，说“确保所有字段都已输入”。

问题是我正在使用 JODA-TIME，但我不太确定如何检查或验证这一点？我在我的选择器和保存按钮的代码下方添加了：

日期+时间选择器：

 datePickerButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {

            DatePickerDialog datePickerDialog = new DatePickerDialog(CreateLine.this, new DatePickerDialog.OnDateSetListener() {

                @Override
                public void onDateSet(DatePicker datePicker, int year, int monthOfYear, int dayOfMonth) {


                    monthOfYear = monthOfYear + 1;
                    String Sd = String.valueOf(dayOfMonth + "/" + monthOfYear + "/" + year);

                    datePickerButton.setText(Sd);

                    yearNow = year;
                    monthNow = monthOfYear;
                    dayNow = dayOfMonth;

                }


            }, displayCurrentYear, displayCurrentMonth, displayCurrentDay);


            datePickerDialog.getDatePicker().setMaxDate(System.currentTimeMillis());
            datePickerDialog.show();
        }


    });

    timePickerButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {

            TimePickerDialog timePickerDialog = new TimePickerDialog(CreateLine.this, new TimePickerDialog.OnTimeSetListener() {

                @Override
                public void onTimeSet(TimePicker timePicker, int hour, int minute) {

                    hourNow = hour;
                    minuteNow = minute;

                    String St = String.format("%02d:%02d", hour, minute);
                    timePickerButton.setText(St);



                }
            }, displayCurrentHour, displayCurrentMinute, isTwentyFourHrsNow);

            timePickerDialog.show();
        }
    });

保存按钮：

VerifyButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {

            if (spinner.getSelectedItem().toString().equals("Select Line Type") || spinner2.getSelectedItem().toString().equals("Select Package Type")) {
                    AlertDialog.Builder builder = new AlertDialog.Builder(CreateLine.this);
                    builder.setTitle("Data Input Error");
                    builder.setMessage("Please Ensure that all fields have been selected before Saving!");
                    builder.setIcon(R.drawable.warning_icon);
                    builder.setCancelable(true);

                    builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.cancel();
                        }
                    });

                    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.cancel();
                        }
                    });
                    AlertDialog alert = builder.create();
                    alert.show();
                } else if (monthNow >= 1 && monthNow <= 12) {

                    spinnerSelection = String.valueOf(spinner.getSelectedItem());
                    spinnerSelection2 = String.valueOf(spinner2.getSelectedItem());
                    String q = quantity.getText().toString();
                    String d = duration.getText().toString();

                    DateTime datetime = new DateTime(yearNow, monthNow, dayNow, hourNow, minuteNow);
                    DateTimeFormatter fmt = DateTimeFormat.forPattern("EE dd MM yyyy" + "\n" + " h:mm a ");
                    String formattedtime = fmt.print(datetime);
                    CalculateButton.setText(formattedtime);

                    // Plus some hours, minutes, and seconds to the original DateTime.
                    DateTimeFormatter fmt2 = DateTimeFormat.forPattern("EE dd MM yyyy" + "\n" + " h:mm a ");

                    DateTime dateTime1 = datetime.plusHours(timeadded);
                    String endtimecalc = fmt2.print(dateTime1);
                    TextView endtime = findViewById(endtimetextView);
                    endtime.setVisibility(View.VISIBLE);
                    endtime.setText(endtimecalc);

                    //INSERT DATA TO DATABASE
                    boolean isInserted = myDb.insertData(
                            spinnerSelection,
                            spinnerSelection2,
                            q,
                            d,
                            formattedtime,
                            endtimecalc);


                    if (isInserted == true) {
                        Toast.makeText(CreateLine.this, "Data Inserted Successfully", Toast.LENGTH_LONG).show();
                        Intent intent = new Intent(CreateLine.this, Dashboard.class);
                        startActivity(intent);
                    } else if (isInserted == false) {
                        AlertDialog.Builder builder = new AlertDialog.Builder(CreateLine.this);
                        builder.setTitle("Save Data Error");
                        builder.setMessage("Data for this Line already exists.." + "\n" + "Please Clear Line First!");
                        builder.setIcon(R.drawable.warning_icon);
                        builder.setCancelable(true);

                        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                Intent intent = new Intent(CreateLine.this, Dashboard.class);
                                startActivity(intent);
                            }
                        });

                        builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                dialog.cancel();
                            }
                        });
                        AlertDialog alert = builder.create();
                        alert.show();
                    } else {
                        AlertDialog.Builder builder = new AlertDialog.Builder(CreateLine.this);
                        builder.setTitle("Save Data Error");
                        builder.setMessage("No Data has been entered!");
                        builder.setIcon(R.drawable.warning_icon);
                        builder.setCancelable(true);

                        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                dialog.cancel();
                            }
                        });

                        builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                dialog.cancel();
                            }
                        });
                        AlertDialog alert = builder.create();
                        alert.show();
                    }
                }
        }
    });
}

}

这是我收到的 Logcat 错误：

org.joda.time.IllegalFieldValueException：monthOfYear 的值 0 必须在 [1,12] 范围内 在 org.joda.time.field.FieldUtils.verifyValueBounds(FieldUtils.java:275) 在 org.joda.time.chrono.BasicChronology.getDateMidnightMillis（BasicChronology.java:631） 在 org.joda.time.chrono.BasicChronology.getDateTimeMillis0（BasicChronology.java:186） 在 org.joda.time.chrono.BasicChronology.getDateTimeMillis（BasicChronology.java:182） 在 org.joda.time.chrono.AssembledChronology.getDateTimeMillis（AssembledChronology.java:133） 在 org.joda.time.chrono.ZonedChronology.getDateTimeMillis（ZonedChronology.java:122） 在 org.joda.time.chrono.AssembledChronology.getDateTimeMillis（AssembledChronology.java:133） 在 org.joda.time.base.BaseDateTime.(BaseDateTime.java:257) 在 org.joda.time.base.BaseDateTime.(BaseDateTime.java:198) 在 org.joda.time.DateTime.(DateTime.java:323) 在 com.almac.tracker.CreateLine$6.onClick(CreateLine.java:313)

第 313 行：

DateTime datetime = new DateTime(yearNow, monthNow, dayNow, hourNow, minuteNow);

有谁知道我如何检查或验证这个？

Answer 1

VerifyButton.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View view) {
        if(monthNow>=1 && monthNow <=12){
            doWhatYouDoNow;
        } else {
            alert(errorMsg);
        }
    }
}

或者您可以创建一个方法来验证所有参数并返回错误消息映射，然后显示给用户，而不是只检查月份。