time picker in android

import android.app.Activity;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TimePicker;
import android.widget.Toast;

public class DateView extends Activity {
    /** Called when the activity is first created. */
   
TimePicker tp;
DatePicker dp;
Button b1;
int hour,minute;
static final int timeid=0;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        tp=(TimePicker)findViewById(R.id.timePicker1);
        tp.setIs24HourView(true);
        dp=(DatePicker)findViewById(R.id.datePicker1);
        b1=(Button)findViewById(R.id.button1);
        b1.setOnClickListener(new OnClickListener()
        {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(),"Dateselected"+dp.getDayOfMonth()+"/"+dp.getMonth()+1+"/"+dp.getYear()
+"\n"+"time selected"+tp.getCurrentHour()+":"+tp.getCurrentMinute(),Toast.LENGTH_LONG).show();
//showDialog(timeid);

}
       
        });
    }
    protected Dialog onCreateDialog(int id)
    {
    switch (id) {
    case timeid:
    return new TimePickerDialog(
    this, mTimeSetListener, hour, minute, false);
    }
    return null;
    }
    private TimePickerDialog.OnTimeSetListener mTimeSetListener =
    new TimePickerDialog.OnTimeSetListener()
    {
    public void onTimeSet(
    TimePicker view, int hourOfDay, int minuteOfHour)
    {
    hour = hourOfDay;
    minute = minuteOfHour;
    Toast.makeText(getBaseContext(),
    "you have selected"+hour+":"+minute,
    Toast.LENGTH_SHORT).show();
    }
    };
   
}