50个Android开发技巧(09 避免用EditText对日期进行验证)

package com.manning.androidhacks.hack009;

import java.util.Calendar;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;

public class MainActivity extends Activity {

	private static final int DATE_DIALOG_ID = 0;

	private int mYear;
	private int mMonth;
	private int mDay;
	private OnDateSetListener mDateSetListener;
	private Button mDateButton;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		// get the current date
		final Calendar c = Calendar.getInstance();
		mYear = c.get(Calendar.YEAR);
		mMonth = c.get(Calendar.MONTH);
		mDay = c.get(Calendar.DAY_OF_MONTH);

		mDateSetListener = new DatePickerDialog.OnDateSetListener() {
			@Override
			public void onDateSet(DatePicker view, int year, int monthOfYear,
					int dayOfMonth) {
				mDateButton.setText(getString(R.string.picked_date_format,
						monthOfYear + 1, dayOfMonth, year));
			}
		};

		mDateButton = (Button) findViewById(R.id.details_date);
		mDateButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				showDialog(DATE_DIALOG_ID);
			}
		});
	}

	@Override
	protected Dialog onCreateDialog(int id) {
		switch (id) {
		case DATE_DIALOG_ID:
			return new DatePickerDialog(this, mDateSetListener, mYear,
					mMonth - 1, mDay);
		}
		return super.onCreateDialog(id);
	}

}