In Kotlin you can use this code : - 

Simple only need to change date format to this "dd-MM-yyyy" 
val d = Date()
val str: CharSequence = DateFormat.format("dd-MM-yyyy", d.getTime())
Log.e("", str.toString())
    
In Java You use this code: - 
    
Date date = new Date();
CharSequence str  = DateFormat.format("dd-MM-yyyy", date.getTime());
Log.e("Date", str.toString())

Calendar c = Calendar.getInstance();
int day = c.get(Calendar.DAY_OF_MONTH);
int month = c.get(Calendar.MONTH);
int year = c.get(Calendar.YEAR);
String date = day + "/" + (month + 1) + "/" + year;

Log.i("TAG", "--->" + date);

CharSequence s  = DateFormat.getDateInstance().format("MMMM d, yyyy ");

首先需要一个实例

此方法可用于从系统中获取当前日期。

public static String getCurrentDateAndTime(){
    Date c = Calendar.getInstance().getTime();
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/MM/dd");
    String formattedDate = simpleDateFormat.format(c);
    return formattedDate;
}

它是简单的一行代码，用于以yyyy-MM-dd格式获取当前日期 你可以使用你想要的格式:

String date = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault()).format(new Date());

这与android无关，因为它是基于java的，所以你可以使用

private String getDateTime() { 
   DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
   Date date = new Date(); 
   return dateFormat.format(date); 
}