DateView.java revision 9f5664b87614d230e181cf0043396b55a38000c1 
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.util.AttributeSet;
24import android.util.Log;
25import android.view.View;
26import android.view.ViewParent;
27import android.widget.TextView;
28
29import com.android.systemui.R;
30
31import java.text.SimpleDateFormat;
32import java.util.Date;
33import java.util.Locale;
34
35import libcore.icu.ICU;
36
37public class DateView extends TextView {
38    private static final String TAG = "DateView";
39
40    private final Date mCurrentTime = new Date();
41
42    private SimpleDateFormat mDateFormat;
43    private String mLastText;
44
45    private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
46        @Override
47        public void onReceive(Context context, Intent intent) {
48            final String action = intent.getAction();
49            if (Intent.ACTION_TIME_TICK.equals(action)
50                    || Intent.ACTION_TIME_CHANGED.equals(action)
51                    || Intent.ACTION_TIMEZONE_CHANGED.equals(action)
52                    || Intent.ACTION_LOCALE_CHANGED.equals(action)) {
53                if (Intent.ACTION_LOCALE_CHANGED.equals(action)
54                        || Intent.ACTION_TIMEZONE_CHANGED.equals(action)) {
55                    // need to get a fresh date format
56                    mDateFormat = null;
57                }
58                updateClock();
59            }
60        }
61    };
62
63    public DateView(Context context, AttributeSet attrs) {
64        super(context, attrs);
65    }
66
67    @Override
68    protected void onAttachedToWindow() {
69        super.onAttachedToWindow();
70
71        IntentFilter filter = new IntentFilter();
72        filter.addAction(Intent.ACTION_TIME_TICK);
73        filter.addAction(Intent.ACTION_TIME_CHANGED);
74        filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
75        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
76        mContext.registerReceiver(mIntentReceiver, filter, null, null);
77
78        updateClock();
79    }
80
81    @Override
82    protected void onDetachedFromWindow() {
83        super.onDetachedFromWindow();
84
85        mDateFormat = null; // reload the locale next time
86        mContext.unregisterReceiver(mIntentReceiver);
87    }
88
89    protected void updateClock() {
90        if (mDateFormat == null) {
91            final String dateFormat = getContext().getString(R.string.system_ui_date_pattern);
92            final Locale l = Locale.getDefault();
93            final String fmt = ICU.getBestDateTimePattern(dateFormat, l.toString());
94            mDateFormat = new SimpleDateFormat(fmt, l);
95        }
96
97        mCurrentTime.setTime(System.currentTimeMillis());
98
99        final String text = mDateFormat.format(mCurrentTime);
100        if (!text.equals(mLastText)) {
101            setText(text);
102            mLastText = text;
103        }
104    }
105}
106