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

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

//导入Date类为java.util

试试这个链接的代码，这是绝对正确的答案，所有的情况下，所有的日期和时间。或根据应用程序的需要和要求自定义日期和时间。

试试这个链接。试试这个链接

SimpleDateFormat df = new SimpleDateFormat("dd-MMM-yyyy");
String date = df.format(Calendar.getInstance().getTime());

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())