Android Open Source - DatePicker Date Picker

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License

The source code is released under:

Apache License

Java Source Code

package org.chenglei.widget.datepicker;
/*w  ww .  jav  a  2 s .c o  m*/
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.widget.LinearLayout;

public class DatePicker extends LinearLayout implements NumberPicker.OnValueChangeListener {
  
  private NumberPicker mYearPicker;
  private NumberPicker mMonthPicker;
  private NumberPicker mDayOfMonthPicker;
  
  private Calendar mCalendar;
  
  private OnDateChangedListener mOnDateChangedListener;
  
  private LayoutInflater mLayoutInflater;

  public DatePicker(Context context) {
    this(context, null);
  }
  
  public DatePicker(Context context, AttributeSet attrs) {
    super(context, attrs);
    mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    init();
  }
  
  private void init() {
    mLayoutInflater.inflate(R.layout.date_picker_layout, this, true);
    mYearPicker = (NumberPicker) findViewById(R.id.year_picker);
    mMonthPicker = (NumberPicker) findViewById(R.id.month_picker);
    mDayOfMonthPicker = (NumberPicker) findViewById(R.id.day_picker);
    
    mYearPicker.setOnValueChangeListener(this);
    mMonthPicker.setOnValueChangeListener(this);
    mDayOfMonthPicker.setOnValueChangeListener(this);
    
    if (!getResources().getConfiguration().locale.getCountry().equals("CN")
        && !getResources().getConfiguration().locale.getCountry().equals("TW")) {
      
      String[] monthNames = getResources().getStringArray(R.array.month_name);
      mMonthPicker.setCustomTextArray(monthNames);
      
    }
    
    mCalendar = Calendar.getInstance();
    setDate(mCalendar.getTime());
  }
  
  public void setDate(Date date) {
    mCalendar.setTime(date);
    mDayOfMonthPicker.setEndNumber(mCalendar.getActualMaximum(Calendar.DAY_OF_MONTH));
    
    mYearPicker.setCurrentNumber(mCalendar.get(Calendar.YEAR));
    mMonthPicker.setCurrentNumber(mCalendar.get(Calendar.MONTH) + 1);
    mDayOfMonthPicker.setCurrentNumber(mCalendar.get(Calendar.DAY_OF_MONTH));
    
  }

  @Override
  public void onValueChange(final NumberPicker picker, final int oldVal, final int newVal) {
    
    if (picker == mYearPicker) {
      mCalendar.set(Calendar.YEAR, newVal);
      mDayOfMonthPicker.setEndNumber(mCalendar.getActualMaximum(Calendar.DAY_OF_MONTH));
    } else if (picker == mMonthPicker) {
      mCalendar.set(Calendar.MONTH, newVal - 1);
      mDayOfMonthPicker.setEndNumber(mCalendar.getActualMaximum(Calendar.DAY_OF_MONTH));
    } else if (picker == mDayOfMonthPicker) {
      mCalendar.set(Calendar.DAY_OF_WEEK, newVal);
    }
    
    notifyDateChanged();
  }
  
  /**
     * The callback used to indicate the user changes\d the date.
     */
    public interface OnDateChangedListener {

        /**
         * Called upon a date change.
         *
         * @param view The view associated with this listener.
         * @param year The year that was set.
         * @param monthOfYear The month that was set (0-11) for compatibility
         *            with {@link java.util.Calendar}.
         * @param dayOfMonth The day of the month that was set.
         */
        void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth);
    }
    
    public void setOnDateChangedListener(OnDateChangedListener l) {
      mOnDateChangedListener = l;
    }
    
    private void notifyDateChanged() {
      if (mOnDateChangedListener != null) {
        mOnDateChangedListener.onDateChanged(this, getYear(), getMonth(), getDayOfMonth());
      }
    }
    
    public int getYear() {
      return mCalendar.get(Calendar.YEAR);
    }
    
    public int getMonth() {
      return mCalendar.get(Calendar.MONTH) + 1;
    }
    
    public int getDayOfMonth() {
      return mCalendar.get(Calendar.DAY_OF_MONTH);
    }
    
    public void setSoundEffect(Sound sound) {
      mYearPicker.setSoundEffect(sound);
      mMonthPicker.setSoundEffect(sound);
      mDayOfMonthPicker.setSoundEffect(sound);
    }
    
    @Override
    public void setSoundEffectsEnabled(boolean soundEffectsEnabled) {
      super.setSoundEffectsEnabled(soundEffectsEnabled);
      mYearPicker.setSoundEffectsEnabled(soundEffectsEnabled);
      mMonthPicker.setSoundEffectsEnabled(soundEffectsEnabled);
      mDayOfMonthPicker.setSoundEffectsEnabled(soundEffectsEnabled);
    }

}

Java Source Code List

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