private int year;

    private int monthOfYear;

    private int dayOfMonth;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        button = (Button) findViewById(R.id.button);

        Calendar calendar = Calendar.getInstance();

        year = calendar.get(Calendar.YEAR);

        monthOfYear = calendar.get(Calendar.MONTH);

        dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);

        button.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                // TODO Auto-generated method stub

                DatePickerDialog pickerDialog = new DatePickerDialog(MainActivity.this, new OnDateSetListener() {

                    @Override

                    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {

                        // TODO Auto-generated method stub

                        Toast.makeText(MainActivity.this, year + "年" + monthOfYear + "月" + dayOfMonth + "日", 1).show();

                    }

                }, year, monthOfYear, dayOfMonth);

                pickerDialog.show();

            }

        });

    }