Convert int month from date timePicker to String

Calendar cal=Calendar.getInstance();
   SimpleDateFormat month_date = new SimpleDateFormat("MMMM");
   String month_name = month_date.format(cal.getTime());

// I set the month in global as static
static int month;

public Dialog onCreateDialog(Bundle savedInstanceState) //display calender
       {

           final Calendar c=Calendar.getInstance();
           int year=c.get(Calendar.YEAR);
           month=c.get(Calendar.MONTH);
           int day=c.get(Calendar.DAY_OF_MONTH);
           return new DatePickerDialog(getActivity(),this,year, month,day);
       }

       public void onDateSet(DatePicker view,int year, int month, int day)
       {
           String date1=year+"-"+String.format("%02d", month+1)+"-"+String.format("%02d", day);
           date.setText(date1);
           date2= date.getText().toString();
           return ;
       }

 CompareMonth.setOnClickListener(new View.OnClickListener()
            {    
                @Override
                public void onClick(View v) {
                     if(!month_name.equals(getMonthName(month)))
                {
                    Toast.makeText(getApplicationContext(),"You select the wrong month",Toast.LENGTH_LONG).show();
                    Toast.makeText(getApplicationContext(),month_arr[month],Toast.LENGTH_LONG).show();
                    return;
                }           
            });

 private String getMonthName(int monthOfYear)
    {
        Calendar c = Calendar.getInstance();
        c.set(Calendar.MONTH, monthOfYear);
        return new SimpleDateFormat("MMMM").format(c.getTime());
    }
}