현재시간에서 datepicker선택된 값을 빼고 싶은데요 ㅠㅠ
현재시간은 구했고 datepicker도 구했는데..
어떤 방법으로 이 둘에 값을 빼야 하는지...
찾아봤는데 어렵네요 ㅠㅠ
부탁드립니다.

package Dong.aniv3;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.GregorianCalendar;
import org.w3c.dom.Text;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
public class aniv3 extends Activity {
    /** Called when the activity is first created. */
    DatePicker picker;
    TextView text;
    Button button;
 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
    picker = (DatePicker)findViewById(R.id.datePicker);
    text = (TextView)findViewById(R.id.text);
 button = (Button)findViewById(R.id.btn1);
 button.setOnClickListener(click);
 }
 OnClickListener click = new OnClickListener() {
  
  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   
   Calendar calendar = Calendar.getInstance();
   int year = calendar.get(Calendar.YEAR);
   int month = calendar.get(Calendar.MONTH)+1;
   int day = calendar.get(Calendar.DAY_OF_MONTH);
   
   Calendar calendar2 = new GregorianCalendar(picker.getYear(), picker.getMonth(), picker.getDayOfMonth());
    calendar2.add(Calendar.DATE,1000);
   
   SimpleDateFormat dateformat = new SimpleDateFormat("yyyy-MM-dd");
    text.setText(dateformat.format(calendar2.getTime()));
   
  }
 };
 
 
}