[JAVA] [Android] Get the date on Monday

//Get today's date
//Example: Today (9)/3(tue)→9/2(mon)To get)

//I am using a calendar because localDate cannot be used.
Date today = new Date();
Calendar day = Calendar.getInstance();

//Method to get monday
day.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
today = day.getTime();

//Format to String type (if necessary)
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
String strToday = sdf.format(today);

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