XYyyymmdd.java

package com.bigdo.controls;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.graphics.Typeface;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.bigdo.controls.wheel.widget.OnWheelChangedListener;
import com.bigdo.controls.wheel.widget.OnWheelClickedListener;
import com.bigdo.controls.wheel.widget.WheelView;
import com.bigdo.controls.wheel.widget.adapters.ArrayWheelAdapter;
import com.bigdo.controls.wheel.widget.adapters.NumericWheelAdapter;

public class XYyyymmdd {
	public final static int minYear = 1000;
	Calendar calendar;
	Activity a;
	WheelView year, month, day;

	@SuppressLint("SimpleDateFormat")
	public XYyyymmdd(Activity a, WheelView year, WheelView month,
			WheelView day, String date) {
		this.a = a;
		this.year = year;
		this.month = month;
		this.day = day;
		calendar = Calendar.getInstance();
		if (date != null && !date.equals("")) {
			date = date.replace('.', '-');
			date = date.replace('/', '-');
			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
			try {
				Date s_date = (Date) sdf.parse(date);
				calendar.setTime(s_date);
			} catch (Exception e) {
			}
		}

		OnWheelChangedListener listener = new OnWheelChangedListener() {
			public void onChanged(WheelView wheel, int oldValue, int newValue) {
				updateDays(XYyyymmdd.this.year, XYyyymmdd.this.month,
						XYyyymmdd.this.day);
			}
		};

		int curMonth = calendar.get(Calendar.MONTH);
		String months[] = new String[] { "01月", "02月", "03月", "04月", "05月",
				"06月", "07月", "08月", "09月", "10月", "11月", "12月" };
		month.setViewAdapter(new DateArrayAdapter(a, months, curMonth));
		month.setCurrentItem(curMonth);
		month.setCyclic(true);
		month.addChangingListener(listener);
		// year
		int curYear = calendar.get(Calendar.YEAR);
		if (curYear < minYear) {
			curYear = minYear;
		} else if (curYear > 9999) {
			curYear = 9998;
		}
		year.setViewAdapter(new DateNumericAdapter(a, minYear, 9999, curYear
				- minYear, "%1$s年"));
		year.setCurrentItem(curYear - minYear);
		year.setCyclic(true);
		year.addChangingListener(listener);
		// day
		updateDays(year, month, day);
		day.setCurrentItem(calendar.get(Calendar.DAY_OF_MONTH) - 1);
		day.setCyclic(true);
		OnWheelClickedListener click = new OnWheelClickedListener() {
			public void onItemClicked(WheelView wheel, int itemIndex) {
				wheel.setCurrentItem(itemIndex, true);
			}
		};
		year.addClickingListener(click);
		month.addClickingListener(click);
		day.addClickingListener(click);
	}

	private void updateDays(WheelView year, WheelView month, WheelView day) {
		calendar.set(Calendar.YEAR, minYear + year.getCurrentItem());
		calendar.set(Calendar.MONTH, month.getCurrentItem());

		int maxDays = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
		day.setViewAdapter(new DateNumericAdapter(a, 1, maxDays, calendar
				.get(Calendar.DAY_OF_MONTH) - 1, "%1$02d日"));
		int curDay = Math.min(maxDays, day.getCurrentItem() + 1);
		day.setCurrentItem(curDay - 1, true);
	}

	/**
	 * Adapter for numeric wheels. Highlights the current value.
	 */
	private class DateNumericAdapter extends NumericWheelAdapter {
		// Index of current item
		int currentItem;
		// Index of item to be highlighted
		int currentValue;

		/**
		 * Constructor
		 */
		public DateNumericAdapter(Context context, int minValue, int maxValue,
				int current, String format) {
			super(context, minValue, maxValue, format);
			this.currentValue = current;
			setTextSize(16);
		}

		@Override
		protected void configureTextView(TextView view) {
			super.configureTextView(view);
			if (currentItem == currentValue) {
				view.setTextColor(0xFF0000F0);
			}
			view.setTypeface(Typeface.SANS_SERIF);
		}

		@Override
		public View getItem(int index, View cachedView, ViewGroup parent) {
			currentItem = index;
			return super.getItem(index, cachedView, parent);
		}
	}

	/**
	 * Adapter for string based wheel. Highlights the current value.
	 */
	private class DateArrayAdapter extends ArrayWheelAdapter<String> {
		// Index of current item
		int currentItem;
		// Index of item to be highlighted
		int currentValue;

		/**
		 * Constructor
		 */
		public DateArrayAdapter(Context context, String[] items, int current) {
			super(context, items);
			this.currentValue = current;
			setTextSize(16);
		}

		@Override
		protected void configureTextView(TextView view) {
			super.configureTextView(view);
			if (currentItem == currentValue) {
				view.setTextColor(0xFF0000F0);
			}
			view.setTypeface(Typeface.SANS_SERIF);
		}

		@Override
		public View getItem(int index, View cachedView, ViewGroup parent) {
			currentItem = index;
			return super.getItem(index, cachedView, parent);
		}
	}

}