java - 在android中转换日期格式？

Question

我正在开发日历日期选择器。我收到格式为 2013/7/7 的日期，但我希望格式为 2013/07/07

代码:

protected Dialog onCreateDialog(int id)  
{

    Calendar c = Calendar.getInstance();
    int cyear = c.get(Calendar.YEAR);
    int cmonth = c.get(Calendar.MONTH);
    int cday = c.get(Calendar.DAY_OF_MONTH);

    switch (id) {
    case DATE_DIALOG_ID:
        return new DatePickerDialog(this,  mDateSetListener,  cyear, cmonth, cday);
    }


    private DatePickerDialog.OnDateSetListener mDateSetListene = new DatePickerDialog.OnDateSetListener() 
    {
        // onDateSet method
        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
        String date_selected = String.valueOf(year)+" /"+String.valueOf(monthOfYear+1)+" /"+String.valueOf(dayOfMonth);

        dob.setText(date_selected);

    }
};

Answer 1

使用日期格式化程序

    String date="2013/7/7";
    SimpleDateFormat df=new SimpleDateFormat("yyyy/MM/dd");
    System.out.println(df.format(df.parse(date)));