DatePickerDialog.java revision 41ec65355bd6ded652769725b276d47c54a0d913
1/* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.app; 18 19import android.content.Context; 20import android.content.DialogInterface; 21import android.content.DialogInterface.OnClickListener; 22import android.os.Bundle; 23import android.text.TextUtils.TruncateAt; 24import android.text.format.DateFormat; 25import android.view.LayoutInflater; 26import android.view.View; 27import android.widget.DatePicker; 28import android.widget.TextView; 29import android.widget.DatePicker.OnDateChangedListener; 30 31import com.android.internal.R; 32 33import java.text.DateFormatSymbols; 34import java.util.Calendar; 35 36/** 37 * A simple dialog containing an {@link android.widget.DatePicker}. 38 * 39 * <p>See the <a href="{@docRoot}resources/tutorials/views/hello-datepicker.html">Date Picker 40 * tutorial</a>.</p> 41 */ 42public class DatePickerDialog extends AlertDialog implements OnClickListener, 43 OnDateChangedListener { 44 45 private static final String YEAR = "year"; 46 private static final String MONTH = "month"; 47 private static final String DAY = "day"; 48 49 private final DatePicker mDatePicker; 50 private final OnDateSetListener mCallBack; 51 private final Calendar mCalendar; 52 private final java.text.DateFormat mTitleDateFormat; 53 private final String[] mWeekDays; 54 55 private int mInitialYear; 56 private int mInitialMonth; 57 private int mInitialDay; 58 59 /** 60 * The callback used to indicate the user is done filling in the date. 61 */ 62 public interface OnDateSetListener { 63 64 /** 65 * @param view The view associated with this listener. 66 * @param year The year that was set. 67 * @param monthOfYear The month that was set (0-11) for compatibility 68 * with {@link java.util.Calendar}. 69 * @param dayOfMonth The day of the month that was set. 70 */ 71 void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth); 72 } 73 74 /** 75 * @param context The context the dialog is to run in. 76 * @param callBack How the parent is notified that the date is set. 77 * @param year The initial year of the dialog. 78 * @param monthOfYear The initial month of the dialog. 79 * @param dayOfMonth The initial day of the dialog. 80 */ 81 public DatePickerDialog(Context context, 82 OnDateSetListener callBack, 83 int year, 84 int monthOfYear, 85 int dayOfMonth) { 86 this(context, com.android.internal.R.style.Theme_Dialog_Alert, 87 callBack, year, monthOfYear, dayOfMonth); 88 } 89 90 /** 91 * @param context The context the dialog is to run in. 92 * @param theme the theme to apply to this dialog 93 * @param callBack How the parent is notified that the date is set. 94 * @param year The initial year of the dialog. 95 * @param monthOfYear The initial month of the dialog. 96 * @param dayOfMonth The initial day of the dialog. 97 */ 98 public DatePickerDialog(Context context, 99 int theme, 100 OnDateSetListener callBack, 101 int year, 102 int monthOfYear, 103 int dayOfMonth) { 104 super(context, theme); 105 106 mCallBack = callBack; 107 mInitialYear = year; 108 mInitialMonth = monthOfYear; 109 mInitialDay = dayOfMonth; 110 DateFormatSymbols symbols = new DateFormatSymbols(); 111 mWeekDays = symbols.getShortWeekdays(); 112 113 mTitleDateFormat = java.text.DateFormat. 114 getDateInstance(java.text.DateFormat.FULL); 115 mCalendar = Calendar.getInstance(); 116 updateTitle(mInitialYear, mInitialMonth, mInitialDay); 117 118 setButton(context.getText(R.string.date_time_set), this); 119 setButton2(context.getText(R.string.cancel), (OnClickListener) null); 120 setIcon(R.drawable.ic_dialog_time); 121 122 LayoutInflater inflater = 123 (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 124 View view = inflater.inflate(R.layout.date_picker_dialog, null); 125 setView(view); 126 mDatePicker = (DatePicker) view.findViewById(R.id.datePicker); 127 mDatePicker.init(mInitialYear, mInitialMonth, mInitialDay, this); 128 } 129 130 @Override 131 public void show() { 132 super.show(); 133 134 /* Sometimes the full month is displayed causing the title 135 * to be very long, in those cases ensure it doesn't wrap to 136 * 2 lines (as that looks jumpy) and ensure we ellipsize the end. 137 */ 138 TextView title = (TextView) findViewById(R.id.alertTitle); 139 title.setSingleLine(); 140 title.setEllipsize(TruncateAt.END); 141 } 142 143 public void onClick(DialogInterface dialog, int which) { 144 if (mCallBack != null) { 145 mDatePicker.clearFocus(); 146 mCallBack.onDateSet(mDatePicker, mDatePicker.getYear(), 147 mDatePicker.getMonth(), mDatePicker.getDayOfMonth()); 148 } 149 } 150 151 public void onDateChanged(DatePicker view, int year, 152 int month, int day) { 153 updateTitle(year, month, day); 154 } 155 156 public void updateDate(int year, int monthOfYear, int dayOfMonth) { 157 mInitialYear = year; 158 mInitialMonth = monthOfYear; 159 mInitialDay = dayOfMonth; 160 mDatePicker.updateDate(year, monthOfYear, dayOfMonth); 161 } 162 163 private void updateTitle(int year, int month, int day) { 164 mCalendar.set(Calendar.YEAR, year); 165 mCalendar.set(Calendar.MONTH, month); 166 mCalendar.set(Calendar.DAY_OF_MONTH, day); 167 setTitle(mTitleDateFormat.format(mCalendar.getTime())); 168 } 169 170 @Override 171 public Bundle onSaveInstanceState() { 172 Bundle state = super.onSaveInstanceState(); 173 state.putInt(YEAR, mDatePicker.getYear()); 174 state.putInt(MONTH, mDatePicker.getMonth()); 175 state.putInt(DAY, mDatePicker.getDayOfMonth()); 176 return state; 177 } 178 179 @Override 180 public void onRestoreInstanceState(Bundle savedInstanceState) { 181 super.onRestoreInstanceState(savedInstanceState); 182 int year = savedInstanceState.getInt(YEAR); 183 int month = savedInstanceState.getInt(MONTH); 184 int day = savedInstanceState.getInt(DAY); 185 mDatePicker.init(year, month, day, this); 186 updateTitle(year, month, day); 187 } 188} 189