DatePickerDialog.java revision c63806d852a550d82bbe6cadff8a2139d78ed559 
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.Build;
23import android.os.Bundle;
24import android.text.TextUtils.TruncateAt;
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, context.getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.HONEYCOMB
87                        ? com.android.internal.R.style.Theme_Holo_Dialog_Alert
88                        : com.android.internal.R.style.Theme_Dialog_Alert,
89                callBack, year, monthOfYear, dayOfMonth);
90    }
91
92    /**
93     * @param context The context the dialog is to run in.
94     * @param theme the theme to apply to this dialog
95     * @param callBack How the parent is notified that the date is set.
96     * @param year The initial year of the dialog.
97     * @param monthOfYear The initial month of the dialog.
98     * @param dayOfMonth The initial day of the dialog.
99     */
100    public DatePickerDialog(Context context,
101            int theme,
102            OnDateSetListener callBack,
103            int year,
104            int monthOfYear,
105            int dayOfMonth) {
106        super(context, theme);
107
108        mCallBack = callBack;
109        mInitialYear = year;
110        mInitialMonth = monthOfYear;
111        mInitialDay = dayOfMonth;
112        DateFormatSymbols symbols = new DateFormatSymbols();
113        mWeekDays = symbols.getShortWeekdays();
114
115        mTitleDateFormat = java.text.DateFormat.
116                                getDateInstance(java.text.DateFormat.FULL);
117        mCalendar = Calendar.getInstance();
118        updateTitle(mInitialYear, mInitialMonth, mInitialDay);
119
120        setButton(BUTTON_POSITIVE, context.getText(R.string.date_time_set), this);
121        setButton(BUTTON_NEGATIVE, context.getText(R.string.cancel), (OnClickListener) null);
122        setIcon(R.drawable.ic_dialog_time);
123
124        LayoutInflater inflater =
125                (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
126        View view = inflater.inflate(R.layout.date_picker_dialog, null);
127        setView(view);
128        mDatePicker = (DatePicker) view.findViewById(R.id.datePicker);
129        mDatePicker.init(mInitialYear, mInitialMonth, mInitialDay, this);
130    }
131
132    @Override
133    public void show() {
134        super.show();
135
136        /* Sometimes the full month is displayed causing the title
137         * to be very long, in those cases ensure it doesn't wrap to
138         * 2 lines (as that looks jumpy) and ensure we ellipsize the end.
139         */
140        TextView title = (TextView) findViewById(R.id.alertTitle);
141        title.setSingleLine();
142        title.setEllipsize(TruncateAt.END);
143    }
144
145    public void onClick(DialogInterface dialog, int which) {
146        if (mCallBack != null) {
147            mDatePicker.clearFocus();
148            mCallBack.onDateSet(mDatePicker, mDatePicker.getYear(),
149                    mDatePicker.getMonth(), mDatePicker.getDayOfMonth());
150        }
151    }
152
153    public void onDateChanged(DatePicker view, int year,
154            int month, int day) {
155        updateTitle(year, month, day);
156    }
157
158    public void updateDate(int year, int monthOfYear, int dayOfMonth) {
159        mInitialYear = year;
160        mInitialMonth = monthOfYear;
161        mInitialDay = dayOfMonth;
162        mDatePicker.updateDate(year, monthOfYear, dayOfMonth);
163    }
164
165    private void updateTitle(int year, int month, int day) {
166        mCalendar.set(Calendar.YEAR, year);
167        mCalendar.set(Calendar.MONTH, month);
168        mCalendar.set(Calendar.DAY_OF_MONTH, day);
169        setTitle(mTitleDateFormat.format(mCalendar.getTime()));
170    }
171
172    @Override
173    public Bundle onSaveInstanceState() {
174        Bundle state = super.onSaveInstanceState();
175        state.putInt(YEAR, mDatePicker.getYear());
176        state.putInt(MONTH, mDatePicker.getMonth());
177        state.putInt(DAY, mDatePicker.getDayOfMonth());
178        return state;
179    }
180
181    @Override
182    public void onRestoreInstanceState(Bundle savedInstanceState) {
183        super.onRestoreInstanceState(savedInstanceState);
184        int year = savedInstanceState.getInt(YEAR);
185        int month = savedInstanceState.getInt(MONTH);
186        int day = savedInstanceState.getInt(DAY);
187        mDatePicker.init(year, month, day, this);
188        updateTitle(year, month, day);
189    }
190}
191