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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.icu.text.DateFormat;
25import android.icu.text.DisplayContext;
26import android.util.AttributeSet;
27import android.widget.TextView;
28
29import com.android.systemui.R;
30
31import java.text.SimpleDateFormat;
32import java.util.Date;
33import java.util.Locale;
34
35public 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
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
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
94    protected void onDetachedFromWindow() {
95        super.onDetachedFromWindow();
96
97        mDateFormat = null; // reload the locale next time
98        getContext().unregisterReceiver(mIntentReceiver);
99    }
100
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