1 /*
2  * Copyright (C) 2008 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 com.android.systemui.statusbar.policy;
18 
19 import android.content.BroadcastReceiver;
20 import android.content.Context;
21 import android.content.Intent;
22 import android.content.IntentFilter;
23 import android.content.res.TypedArray;
24 import android.icu.text.DateFormat;
25 import android.icu.text.DisplayContext;
26 import android.util.AttributeSet;
27 import android.widget.TextView;
28 
29 import com.android.systemui.R;
30 
31 import java.text.SimpleDateFormat;
32 import java.util.Date;
33 import java.util.Locale;
34 
35 public class DateView extends TextView {
36     private static final String TAG = "DateView";
37 
38     private final Date mCurrentTime = new Date();
39 
40     private DateFormat mDateFormat;
41     private String mLastText;
42     private String mDatePattern;
43 
44     private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
45         @Override
46         public void onReceive(Context context, Intent intent) {
47             final String action = intent.getAction();
48             if (Intent.ACTION_TIME_TICK.equals(action)
49                     || Intent.ACTION_TIME_CHANGED.equals(action)
50                     || Intent.ACTION_TIMEZONE_CHANGED.equals(action)
51                     || Intent.ACTION_LOCALE_CHANGED.equals(action)) {
52                 if (Intent.ACTION_LOCALE_CHANGED.equals(action)
53                         || Intent.ACTION_TIMEZONE_CHANGED.equals(action)) {
54                     // need to get a fresh date format
55                     mDateFormat = null;
56                 }
57                 updateClock();
58             }
59         }
60     };
61 
DateView(Context context, AttributeSet attrs)62     public DateView(Context context, AttributeSet attrs) {
63         super(context, attrs);
64         TypedArray a = context.getTheme().obtainStyledAttributes(
65                 attrs,
66                 R.styleable.DateView,
67                 0, 0);
68 
69         try {
70             mDatePattern = a.getString(R.styleable.DateView_datePattern);
71         } finally {
72             a.recycle();
73         }
74         if (mDatePattern == null) {
75             mDatePattern = getContext().getString(R.string.system_ui_date_pattern);
76         }
77     }
78 
79     @Override
onAttachedToWindow()80     protected void onAttachedToWindow() {
81         super.onAttachedToWindow();
82 
83         IntentFilter filter = new IntentFilter();
84         filter.addAction(Intent.ACTION_TIME_TICK);
85         filter.addAction(Intent.ACTION_TIME_CHANGED);
86         filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
87         filter.addAction(Intent.ACTION_LOCALE_CHANGED);
88         getContext().registerReceiver(mIntentReceiver, filter, null, null);
89 
90         updateClock();
91     }
92 
93     @Override
onDetachedFromWindow()94     protected void onDetachedFromWindow() {
95         super.onDetachedFromWindow();
96 
97         mDateFormat = null; // reload the locale next time
98         getContext().unregisterReceiver(mIntentReceiver);
99     }
100 
updateClock()101     protected void updateClock() {
102         if (mDateFormat == null) {
103             final Locale l = Locale.getDefault();
104             DateFormat format = DateFormat.getInstanceForSkeleton(mDatePattern, l);
105             format.setContext(DisplayContext.CAPITALIZATION_FOR_STANDALONE);
106             mDateFormat = format;
107         }
108 
109         mCurrentTime.setTime(System.currentTimeMillis());
110 
111         final String text = mDateFormat.format(mCurrentTime);
112         if (!text.equals(mLastText)) {
113             setText(text);
114             mLastText = text;
115         }
116     }
117 }
118