我正在打磨我的应用程序并尝试确保它不会被破坏。我有一个CreateLine页面，最后有一个保存按钮。我正在进行测试并尝试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并且应用程序崩溃。基本上我想要发生的是它显示一个警告对话框，说出“确保已输入所有字段”之类的内容。
问题是我正在使用JODA-TIME而且我不太确定如何检查或验证这个？我在下面添加了我的拾取器和保存按钮的代码：
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();
}
}
}
});
}
}
以下是我收到的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） at org.joda.time.chrono.BasicChronology.getDateTimeMillis0（BasicChronology.java:186） at org.joda.time.chrono.BasicChronology.getDateTimeMillis（BasicChronology.java:182） at org.joda.time.chrono.AssembledChronology.getDateTimeMillis（AssembledChronology.java:133） 在org.joda.time.chrono.ZonedChronology.getDateTimeMillis（ZonedChronology.java:122） at 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）
LINE 313：
DateTime datetime = new DateTime（yearNow，monthNow，dayNow，hourNow，minuteNow）;
有谁知道如何检查或验证这个？
答案 0 :(得分：0)
VerifyButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(monthNow>=1 && monthNow <=12){
doWhatYouDoNow;
} else {
alert(errorMsg);
}
}
}
或者不只是检查月份，您可以制作一个方法来验证所有参数并返回错误消息的映射，然后显示给用户。