在 Android 中获取年、月和日期

Question

I am trying to get today's Year, Month and Date using following code;

Calendar calendar = Calendar.getInstance();

int thisYear = calendar.get(Calendar.YEAR);
Log.d(TAG, "# thisYear : " + thisYear);

int thisMonth = calendar.get(Calendar.MONTH);
Log.d(TAG, "@ thisMonth : " + thisMonth);

int thisDay = calendar.get(Calendar.DAY_OF_MONTH);
Log.d(TAG, "$ thisDay : " + thisDay);

But it gives "2012 for year 1 for month and 28 for date" which is not today's date. What I have done wrong?

Answer 1

Would I be correct in assuming this is running on a Emulator? If so, Set the emulator date correctly, and it should be correct.

From memory, that code should do what you expect.

Answer 2

Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
calendar.get(Calendar.YEAR)

Answer 3

import java.util.Calendar;
import java.util.TimeZone;
import android.widget.Toast;

Calendar calendar = Calendar.getInstance(TimeZone.getDefault());

int currentYear = calendar.get(Calendar.YEAR);
int currentMonth = calendar.get(Calendar.MONTH) + 1;
int currentDay = calendar.get(Calendar.DAY_OF_MONTH);

Toast.makeText(this,"Today's Date: " + currentYear + currentMonth + currentDay, Toast.LENGTH_SHORT).show();

"TimeZone" will work great if your application targets for Android API 27 platform or above

Answer 4

The month starts from zero so you have to add 1 with the given month to show the month number we are familiar with.

int thisMonth = calendar.get(Calendar.MONTH);
Log.d(TAG, "@ thisMonth : " + (thisMonth+1));

This will show you the current month starting with 1.

Answer 5

try this one..

 Calendar instance = Calendar.getInstance();
 currentMonth = instance.get(Calendar.MONTH);
 currentYear = instance.get(Calendar.YEAR);

 int month=currentMonth+1;

Answer 6

I tried your code and it is giving correct output. You should try checking time in your emulator/phone on which you are trying this code .

According to getInstance docs, it sets to current date and time by Default.

Answer 7

Try to use:

Date dt = new Date(); 
dt.getYear(); 
dt.getMonth(); 
dt.getDay();

and see if you get the same result. If so, your system date is probably out of sync. Check the Date class documentation for more details:

Answer 8

这给出了你的 android 系统的时间和日期，所以首先检查它。

Answer 9

You can use SimpleDateFormat

Initialising as @SuppressLint("SimpleDateFormat") final SimpleDateFormat dateAndTime = new SimpleDateFormat("DD-MM-yy", Locale.getDefault());

and String timeStamp = dateAndTime.format(new Date());