Android date is incorrect-CodePudding

I am using Calendar class to get year, month and day:

Calendar calendar = Calendar.getInstance();

this.current_year = calendar.get(Calendar.YEAR);
this.current_month = calendar.get(Calendar.MONTH);
this.current_day = calendar.get(Calendar.DAY_OF_MONTH);

Toast.makeText(this.context, this.current_year   "-"   this.current_month   "-"   this.current_day, Toast.LENGTH_SHORT).show();

Today is 11 Dec 2021 (2021-12-11). But toast alert shows 2021-11-11. Also I tried to set calendar time to a new Date class but still wrong

CodePudding user response：

Calendar.MONTH returns value start from 0 to 11. (like 0 for Jan, 1 for Feb). So, for showing current month value, you have to 1 in current_month. Your final Toast looks like,

Toast.makeText(this.context, this.current_year   "-"   (this.current_month 1)   "-"   this.current_day, Toast.LENGTH_SHORT).show();

It will show the result you want.

CodePudding user response：

The Answer by Modi is correct.

Furthermore, never use Calendar. That terrible class was built by people who did not understand date-time handling. Along with Date and SimpleDateFormat, these classes were years ago supplanted by the modern java.time classes.

Specify a time zone to determine date. For any given moment the date varies around the globe by time zone. May be tomorrow in Japan