DatePickerDialog.java revision c36bde662fd679d4cd74d786655ae39d097daf1c 
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 */
39public class DatePickerDialog extends AlertDialog implements OnClickListener,
40        OnDateChangedListener {
41
42    private static final String YEAR = "year";
43    private static final String MONTH = "month";
44    private static final String DAY = "day";
45
46    private final DatePicker mDatePicker;
47    private final OnDateSetListener mCallBack;
48    private final Calendar mCalendar;
49    private final java.text.DateFormat mDateFormat;
50    private final java.text.DateFormat mTitleDateFormat;
51    private final String[] mWeekDays;
52
53    private int mInitialYear;
54    private int mInitialMonth;
55    private int mInitialDay;
56
57    /**
58     * The callback used to indicate the user is done filling in the date.
59     */
60    public interface OnDateSetListener {
61
62        /**
63         * @param view The view associated with this listener.
64         * @param year The year that was set.
65         * @param monthOfYear The month that was set (0-11) for compatibility
66         *  with {@link java.util.Calendar}.
67         * @param dayOfMonth The day of the month that was set.
68         */
69        void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth);
70    }
71
72    /**
73     * @param context The context the dialog is to run in.
74     * @param callBack How the parent is notified that the date is set.
75     * @param year The initial year of the dialog.
76     * @param monthOfYear The initial month of the dialog.
77     * @param dayOfMonth The initial day of the dialog.
78     */
79    public DatePickerDialog(Context context,
80            OnDateSetListener callBack,
81            int year,
82            int monthOfYear,
83            int dayOfMonth) {
84        this(context, com.android.internal.R.style.Theme_Dialog_Alert,
85                callBack, year, monthOfYear, dayOfMonth);
86    }
87
88    /**
89     * @param context The context the dialog is to run in.
90     * @param theme the theme to apply to this dialog
91     * @param callBack How the parent is notified that the date is set.
92     * @param year The initial year of the dialog.
93     * @param monthOfYear The initial month of the dialog.
94     * @param dayOfMonth The initial day of the dialog.
95     */
96    public DatePickerDialog(Context context,
97            int theme,
98            OnDateSetListener callBack,
99            int year,
100            int monthOfYear,
101            int dayOfMonth) {
102        super(context, theme);
103
104        mCallBack = callBack;
105        mInitialYear = year;
106        mInitialMonth = monthOfYear;
107        mInitialDay = dayOfMonth;
108        DateFormatSymbols symbols = new DateFormatSymbols();
109        mWeekDays = symbols.getShortWeekdays();
110
111        mDateFormat = DateFormat.getMediumDateFormat(context);
112        mTitleDateFormat = java.text.DateFormat.
113                                getDateInstance(java.text.DateFormat.FULL);
114        mCalendar = Calendar.getInstance();
115        updateTitle(mInitialYear, mInitialMonth, mInitialDay);
116
117        setButton(context.getText(R.string.date_time_set), this);
118        setButton2(context.getText(R.string.cancel), (OnClickListener) null);
119        setIcon(R.drawable.ic_dialog_time);
120
121        LayoutInflater inflater =
122                (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
123        View view = inflater.inflate(R.layout.date_picker_dialog, null);
124        setView(view);
125        mDatePicker = (DatePicker) view.findViewById(R.id.datePicker);
126        mDatePicker.init(mInitialYear, mInitialMonth, mInitialDay, this);
127    }
128
129    @Override
130    public void show() {
131        super.show();
132
133        /* Sometimes the full month is displayed causing the title
134         * to be very long, in those cases ensure it doesn't wrap to
135         * 2 lines (as that looks jumpy) and ensure we ellipsize the end.
136         */
137        TextView title = (TextView) findViewById(R.id.alertTitle);
138        title.setSingleLine();
139        title.setEllipsize(TruncateAt.END);
140    }
141
142    public void onClick(DialogInterface dialog, int which) {
143        if (mCallBack != null) {
144            mDatePicker.clearFocus();
145            mCallBack.onDateSet(mDatePicker, mDatePicker.getYear(),
146                    mDatePicker.getMonth(), mDatePicker.getDayOfMonth());
147        }
148    }
149
150    public void onDateChanged(DatePicker view, int year,
151            int month, int day) {
152        updateTitle(year, month, day);
153    }
154
155    public void updateDate(int year, int monthOfYear, int dayOfMonth) {
156        mInitialYear = year;
157        mInitialMonth = monthOfYear;
158        mInitialDay = dayOfMonth;
159        mDatePicker.updateDate(year, monthOfYear, dayOfMonth);
160    }
161
162    private void updateTitle(int year, int month, int day) {
163        mCalendar.set(Calendar.YEAR, year);
164        mCalendar.set(Calendar.MONTH, month);
165        mCalendar.set(Calendar.DAY_OF_MONTH, day);
166        setTitle(mTitleDateFormat.format(mCalendar.getTime()));
167    }
168
169    @Override
170    public Bundle onSaveInstanceState() {
171        Bundle state = super.onSaveInstanceState();
172        state.putInt(YEAR, mDatePicker.getYear());
173        state.putInt(MONTH, mDatePicker.getMonth());
174        state.putInt(DAY, mDatePicker.getDayOfMonth());
175        return state;
176    }
177
178    @Override
179    public void onRestoreInstanceState(Bundle savedInstanceState) {
180        super.onRestoreInstanceState(savedInstanceState);
181        int year = savedInstanceState.getInt(YEAR);
182        int month = savedInstanceState.getInt(MONTH);
183        int day = savedInstanceState.getInt(DAY);
184        mDatePicker.init(year, month, day, this);
185        updateTitle(year, month, day);
186    }
187}
188