Dialog box for setting the time and date in the android call system

package com.nico;    import android.app.Activity;  import android.app.DatePickerDialog;  //import android.app.TimePickerDialog;  import android.app.Dialog;    import android.os.Bundle;  import android.util.Log;  import android.view.View;  import android.view.View.OnClickListener;    import android.widget.Button;  import android.widget.DatePicker;  //import android.widget.TimePicker;    public class timePicker extends Activity {      /** Called when the activity is first created. */      private Button ShowDataPickerButton = null;      private static final int DATA_PICKER_ID = 1;        @Override      public void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.data);          ShowDataPickerButton = (Button) findViewById(R.id.ShowDataPickerButton);          ShowDataPickerButton.setOnClickListener(new ShowClickListener());      }        private class ShowClickListener implements OnClickListener {            @Override          public void onClick(View arg0) {              // TODO Auto-generated method stub              showDialog(DATA_PICKER_ID);          }        }        DatePickerDialog.OnDateSetListener onDateSetListener = new DatePickerDialog.OnDateSetListener() {            @Override          public void onDateSet(DatePicker view, int year, int monthOfYear,                  int dayOfMonth) {                Log.v("Test", "-------------?"+year);              System.out.print(year + " " + monthOfYear + "  " + dayOfMonth);          }      };  //  TimePickerDialog.OnTimeSetListener onTimeSetListener = new TimePickerDialog.OnTimeSetListener() {  //  //      @Override  //      public void onTimeSet(TimePicker view, int hourOfDay, int minute) {  //          // TODO Auto-generated method stub  //          System.out.println(hourOfDay + "-" + minute);  //      }  //  //  };        @Override      protected Dialog onCreateDialog(int id) {          // TODO Auto-generated method stub          switch (id) {          case DATA_PICKER_ID:              Log.v("Test", "--------start---------->");              return new DatePickerDialog(this, onDateSetListener, 2011, 01, 01);              // return new TimePickerDialog(this,onTimeSetListener,22,3, true);          }          return super.onCreateDialog(id);      }    }  

<?xml version="1.0" encoding="utf-8"?>    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"        android:orientation="vertical"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        >    <TextView          android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/hello"        />             <Button           android:id="@+id/ShowDataPickerButton"           android:layout_width="fill_parent"            android:layout_height="wrap_content"          />                  </LinearLayout>  

Source: http://hellorheaven.iteye.com/blog/1089834