SimpleDateFormat 给出了错误的日期

Question

public void setDate(View view){
        Calendar calendar = Calendar.getInstance();

       new DatePickerDialog(CreateEventActivity.this,listener,calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH)).show();
    }

    DatePickerDialog.OnDateSetListener listener = new DatePickerDialog.OnDateSetListener() {
        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
            Calendar setTime=Calendar.getInstance();
            setTime.set(year,monthOfYear+1,dayOfMonth);
            eventDate=setTime.getTime();

            SimpleDateFormat dayFormat=new SimpleDateFormat("EEEE");
            eventDayOfWeek=dayFormat.format(eventDate);

            Context appContext=getApplicationContext();
            Toast.makeText(appContext,(appContext.getString(R.string.The_chosen_date_is))+": "+dayOfMonth+"/"+(monthOfYear+1)+"/"+year+","+eventDayOfWeek,Toast.LENGTH_LONG).show();
            dateTxt.setText(dayOfMonth + "/" + (monthOfYear + 1) + "/" + year);
            dayTxt.setText(eventDayOfWeek);


        }
    };

我试图向用户显示他选择的日期（通过日期选择器）。数字中的日期没问题，但字符串中的日期是错误的，2 天 forward.For 例如：星期六而不是星期一。

Answer 1

你找错月份了。 OnDateSetListener months are zero-based like Calendar's 而且您不需要 +1 在这里调整它们：

setTime.set(year,monthOfYear+1,dayOfMonth);

SimpleDateFormat 给出了错误的日期

SimpleDateFormat is giving wrong day

android

simpledateformat

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