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      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 
     17 package android.app;
     18 
     19 import com.android.internal.R;
     20 
     21 import android.content.Context;
     22 import android.content.DialogInterface;
     23 import android.content.DialogInterface.OnClickListener;
     24 import android.os.Bundle;
     25 import android.view.LayoutInflater;
     26 import android.view.View;
     27 import android.widget.TimePicker;
     28 import android.widget.TimePicker.OnTimeChangedListener;
     29 
     30 /**
     31  * A dialog that prompts the user for the time of day using a {@link TimePicker}.
     32  *
     33  * <p>See the <a href="{@docRoot}guide/topics/ui/controls/pickers.html">Pickers</a>
     34  * guide.</p>
     35  */
     36 public class TimePickerDialog extends AlertDialog
     37         implements OnClickListener, OnTimeChangedListener {
     38 
     39     /**
     40      * The callback interface used to indicate the user is done filling in
     41      * the time (they clicked on the 'Set' button).
     42      */
     43     public interface OnTimeSetListener {
     44 
     45         /**
     46          * @param view The view associated with this listener.
     47          * @param hourOfDay The hour that was set.
     48          * @param minute The minute that was set.
     49          */
     50         void onTimeSet(TimePicker view, int hourOfDay, int minute);
     51     }
     52 
     53     private static final String HOUR = "hour";
     54     private static final String MINUTE = "minute";
     55     private static final String IS_24_HOUR = "is24hour";
     56 
     57     private final TimePicker mTimePicker;
     58     private final OnTimeSetListener mCallback;
     59 
     60     int mInitialHourOfDay;
     61     int mInitialMinute;
     62     boolean mIs24HourView;
     63 
     64     /**
     65      * @param context Parent.
     66      * @param callBack How parent is notified.
     67      * @param hourOfDay The initial hour.
     68      * @param minute The initial minute.
     69      * @param is24HourView Whether this is a 24 hour view, or AM/PM.
     70      */
     71     public TimePickerDialog(Context context,
     72             OnTimeSetListener callBack,
     73             int hourOfDay, int minute, boolean is24HourView) {
     74         this(context, 0, callBack, hourOfDay, minute, is24HourView);
     75     }
     76 
     77     /**
     78      * @param context Parent.
     79      * @param theme the theme to apply to this dialog
     80      * @param callBack How parent is notified.
     81      * @param hourOfDay The initial hour.
     82      * @param minute The initial minute.
     83      * @param is24HourView Whether this is a 24 hour view, or AM/PM.
     84      */
     85     public TimePickerDialog(Context context,
     86             int theme,
     87             OnTimeSetListener callBack,
     88             int hourOfDay, int minute, boolean is24HourView) {
     89         super(context, theme);
     90         mCallback = callBack;
     91         mInitialHourOfDay = hourOfDay;
     92         mInitialMinute = minute;
     93         mIs24HourView = is24HourView;
     94 
     95         setIcon(0);
     96         setTitle(R.string.time_picker_dialog_title);
     97 
     98         Context themeContext = getContext();
     99         setButton(BUTTON_POSITIVE, themeContext.getText(R.string.date_time_done), this);
    100 
    101         LayoutInflater inflater =
    102                 (LayoutInflater) themeContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    103         View view = inflater.inflate(R.layout.time_picker_dialog, null);
    104         setView(view);
    105         mTimePicker = (TimePicker) view.findViewById(R.id.timePicker);
    106 
    107         // initialize state
    108         mTimePicker.setIs24HourView(mIs24HourView);
    109         mTimePicker.setCurrentHour(mInitialHourOfDay);
    110         mTimePicker.setCurrentMinute(mInitialMinute);
    111         mTimePicker.setOnTimeChangedListener(this);
    112     }
    113 
    114     public void onClick(DialogInterface dialog, int which) {
    115         tryNotifyTimeSet();
    116     }
    117 
    118     public void updateTime(int hourOfDay, int minutOfHour) {
    119         mTimePicker.setCurrentHour(hourOfDay);
    120         mTimePicker.setCurrentMinute(minutOfHour);
    121     }
    122 
    123     public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
    124         /* do nothing */
    125     }
    126 
    127     private void tryNotifyTimeSet() {
    128         if (mCallback != null) {
    129             mTimePicker.clearFocus();
    130             mCallback.onTimeSet(mTimePicker, mTimePicker.getCurrentHour(),
    131                     mTimePicker.getCurrentMinute());
    132         }
    133     }
    134 
    135     @Override
    136     protected void onStop() {
    137         tryNotifyTimeSet();
    138         super.onStop();
    139     }
    140 
    141     @Override
    142     public Bundle onSaveInstanceState() {
    143         Bundle state = super.onSaveInstanceState();
    144         state.putInt(HOUR, mTimePicker.getCurrentHour());
    145         state.putInt(MINUTE, mTimePicker.getCurrentMinute());
    146         state.putBoolean(IS_24_HOUR, mTimePicker.is24HourView());
    147         return state;
    148     }
    149 
    150     @Override
    151     public void onRestoreInstanceState(Bundle savedInstanceState) {
    152         super.onRestoreInstanceState(savedInstanceState);
    153         int hour = savedInstanceState.getInt(HOUR);
    154         int minute = savedInstanceState.getInt(MINUTE);
    155         mTimePicker.setIs24HourView(savedInstanceState.getBoolean(IS_24_HOUR));
    156         mTimePicker.setCurrentHour(hour);
    157         mTimePicker.setCurrentMinute(minute);
    158     }
    159 }
    160