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
17package com.android.systemui.statusbar.policy;
18
19import android.content.BroadcastReceiver;
20import android.content.Context;
21import android.content.Intent;
22import android.content.IntentFilter;
23import android.content.res.TypedArray;
24import android.text.format.DateFormat;
25import android.util.AttributeSet;
26import android.widget.TextView;
27
28import com.android.systemui.R;
29
30import java.text.SimpleDateFormat;
31import java.util.Date;
32import java.util.Locale;
33
34public class DateView extends TextView {
35    private static final String TAG = "DateView";
36
37    private final Date mCurrentTime = new Date();
38
39    private SimpleDateFormat mDateFormat;
40    private String mLastText;
41    private String mDatePattern;
42
43    private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
44        @Override
45        public void onReceive(Context context, Intent intent) {
46            final String action = intent.getAction();
47            if (Intent.ACTION_TIME_TICK.equals(action)
48                    || Intent.ACTION_TIME_CHANGED.equals(action)
49                    || Intent.ACTION_TIMEZONE_CHANGED.equals(action)
50                    || Intent.ACTION_LOCALE_CHANGED.equals(action)) {
51                if (Intent.ACTION_LOCALE_CHANGED.equals(action)
52                        || Intent.ACTION_TIMEZONE_CHANGED.equals(action)) {
53                    // need to get a fresh date format
54                    mDateFormat = null;
55                }
56                updateClock();
57            }
58        }
59    };
60
61    public DateView(Context context, AttributeSet attrs) {
62        super(context, attrs);
63        TypedArray a = context.getTheme().obtainStyledAttributes(
64                attrs,
65                R.styleable.DateView,
66                0, 0);
67
68        try {
69            mDatePattern = a.getString(R.styleable.DateView_datePattern);
70        } finally {
71            a.recycle();
72        }
73        if (mDatePattern == null) {
74            mDatePattern = getContext().getString(R.string.system_ui_date_pattern);
75        }
76    }
77
78    @Override
79    protected void onAttachedToWindow() {
80        super.onAttachedToWindow();
81
82        IntentFilter filter = new IntentFilter();
83        filter.addAction(Intent.ACTION_TIME_TICK);
84        filter.addAction(Intent.ACTION_TIME_CHANGED);
85        filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
86        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
87        getContext().registerReceiver(mIntentReceiver, filter, null, null);
88
89        updateClock();
90    }
91
92    @Override
93    protected void onDetachedFromWindow() {
94        super.onDetachedFromWindow();
95
96        mDateFormat = null; // reload the locale next time
97        getContext().unregisterReceiver(mIntentReceiver);
98    }
99
100    protected void updateClock() {
101        if (mDateFormat == null) {
102            final Locale l = Locale.getDefault();
103            final String fmt = DateFormat.getBestDateTimePattern(l, mDatePattern);
104            mDateFormat = new SimpleDateFormat(fmt, l);
105        }
106
107        mCurrentTime.setTime(System.currentTimeMillis());
108
109        final String text = mDateFormat.format(mCurrentTime);
110        if (!text.equals(mLastText)) {
111            setText(text);
112            mLastText = text;
113        }
114    }
115}
116