Joe Onorato | c83bb73 | 2010-01-19 16:32:22 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 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.widget; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.content.Intent; |
| 21 | import android.content.IntentFilter; |
| 22 | import android.content.BroadcastReceiver; |
| 23 | import android.database.ContentObserver; |
| 24 | import android.net.Uri; |
| 25 | import android.os.Handler; |
| 26 | import android.text.format.Time; |
| 27 | import android.util.AttributeSet; |
| 28 | import android.util.Log; |
| 29 | import android.provider.Settings; |
| 30 | import android.provider.Settings.SettingNotFoundException; |
| 31 | import android.widget.TextView; |
| 32 | import android.widget.RemoteViews.RemoteView; |
| 33 | |
| 34 | import com.android.internal.R; |
| 35 | |
| 36 | import java.text.DateFormat; |
| 37 | import java.text.SimpleDateFormat; |
| 38 | import java.util.Date; |
| 39 | |
| 40 | // |
| 41 | // TODO |
| 42 | // - listen for the next threshold time to update the view. |
| 43 | // - listen for date format pref changed |
| 44 | // - put the AM/PM in a smaller font |
| 45 | // |
| 46 | |
| 47 | /** |
| 48 | * Displays a given time in a convenient human-readable foramt. |
| 49 | * |
| 50 | * @hide |
| 51 | */ |
| 52 | @RemoteView |
| 53 | public class DateTimeView extends TextView { |
| 54 | private static final String TAG = "DateTimeView"; |
| 55 | |
| 56 | private static final long TWELVE_HOURS_IN_MINUTES = 12 * 60; |
| 57 | private static final long TWENTY_FOUR_HOURS_IN_MILLIS = 24 * 60 * 60 * 1000; |
| 58 | |
| 59 | private static final int SHOW_TIME = 0; |
| 60 | private static final int SHOW_MONTH_DAY_YEAR = 1; |
| 61 | |
| 62 | Date mTime; |
| 63 | long mTimeMillis; |
| 64 | |
| 65 | int mLastDisplay = -1; |
| 66 | DateFormat mLastFormat; |
| 67 | |
| 68 | private boolean mAttachedToWindow; |
| 69 | private long mUpdateTimeMillis; |
| 70 | |
| 71 | public DateTimeView(Context context) { |
| 72 | super(context); |
| 73 | } |
| 74 | |
| 75 | public DateTimeView(Context context, AttributeSet attrs) { |
| 76 | super(context, attrs); |
| 77 | } |
| 78 | |
| 79 | @Override |
| 80 | protected void onAttachedToWindow() { |
Daniel Sandler | 8d3c234 | 2011-08-09 13:10:20 -0400 | [diff] [blame] | 81 | super.onAttachedToWindow(); |
Joe Onorato | c83bb73 | 2010-01-19 16:32:22 -0800 | [diff] [blame] | 82 | registerReceivers(); |
| 83 | mAttachedToWindow = true; |
| 84 | } |
| 85 | |
| 86 | @Override |
| 87 | protected void onDetachedFromWindow() { |
| 88 | super.onDetachedFromWindow(); |
| 89 | unregisterReceivers(); |
| 90 | mAttachedToWindow = false; |
| 91 | } |
| 92 | |
| 93 | @android.view.RemotableViewMethod |
| 94 | public void setTime(long time) { |
| 95 | Time t = new Time(); |
| 96 | t.set(time); |
| 97 | t.second = 0; |
| 98 | mTimeMillis = t.toMillis(false); |
| 99 | mTime = new Date(t.year-1900, t.month, t.monthDay, t.hour, t.minute, 0); |
| 100 | update(); |
| 101 | } |
| 102 | |
| 103 | void update() { |
| 104 | if (mTime == null) { |
| 105 | return; |
| 106 | } |
| 107 | |
| 108 | long start = System.nanoTime(); |
| 109 | |
| 110 | int display; |
| 111 | Date time = mTime; |
| 112 | |
| 113 | Time t = new Time(); |
| 114 | t.set(mTimeMillis); |
| 115 | t.second = 0; |
| 116 | |
| 117 | t.hour -= 12; |
| 118 | long twelveHoursBefore = t.toMillis(false); |
| 119 | t.hour += 12; |
| 120 | long twelveHoursAfter = t.toMillis(false); |
| 121 | t.hour = 0; |
| 122 | t.minute = 0; |
| 123 | long midnightBefore = t.toMillis(false); |
| 124 | t.monthDay++; |
| 125 | long midnightAfter = t.toMillis(false); |
| 126 | |
| 127 | long nowMillis = System.currentTimeMillis(); |
| 128 | t.set(nowMillis); |
| 129 | t.second = 0; |
| 130 | nowMillis = t.normalize(false); |
| 131 | |
| 132 | // Choose the display mode |
| 133 | choose_display: { |
| 134 | if ((nowMillis >= midnightBefore && nowMillis < midnightAfter) |
| 135 | || (nowMillis >= twelveHoursBefore && nowMillis < twelveHoursAfter)) { |
| 136 | display = SHOW_TIME; |
| 137 | break choose_display; |
| 138 | } |
| 139 | // Else, show month day and year. |
| 140 | display = SHOW_MONTH_DAY_YEAR; |
| 141 | break choose_display; |
| 142 | } |
| 143 | |
| 144 | // Choose the format |
| 145 | DateFormat format; |
| 146 | if (display == mLastDisplay && mLastFormat != null) { |
| 147 | // use cached format |
| 148 | format = mLastFormat; |
| 149 | } else { |
| 150 | switch (display) { |
| 151 | case SHOW_TIME: |
| 152 | format = getTimeFormat(); |
| 153 | break; |
| 154 | case SHOW_MONTH_DAY_YEAR: |
| 155 | format = getDateFormat(); |
| 156 | break; |
| 157 | default: |
| 158 | throw new RuntimeException("unknown display value: " + display); |
| 159 | } |
| 160 | mLastFormat = format; |
| 161 | } |
| 162 | |
| 163 | // Set the text |
| 164 | String text = format.format(mTime); |
| 165 | setText(text); |
| 166 | |
| 167 | // Schedule the next update |
| 168 | if (display == SHOW_TIME) { |
| 169 | // Currently showing the time, update at the later of twelve hours after or midnight. |
| 170 | mUpdateTimeMillis = twelveHoursAfter > midnightAfter ? twelveHoursAfter : midnightAfter; |
| 171 | } else { |
| 172 | // Currently showing the date |
| 173 | if (mTimeMillis < nowMillis) { |
| 174 | // If the time is in the past, don't schedule an update |
| 175 | mUpdateTimeMillis = 0; |
| 176 | } else { |
| 177 | // If hte time is in the future, schedule one at the earlier of twelve hours |
| 178 | // before or midnight before. |
| 179 | mUpdateTimeMillis = twelveHoursBefore < midnightBefore |
| 180 | ? twelveHoursBefore : midnightBefore; |
| 181 | } |
| 182 | } |
| 183 | if (false) { |
| 184 | Log.d(TAG, "update needed for '" + time + "' at '" + new Date(mUpdateTimeMillis) |
| 185 | + "' - text=" + text); |
| 186 | } |
| 187 | |
| 188 | long finish = System.nanoTime(); |
| 189 | } |
| 190 | |
| 191 | private DateFormat getTimeFormat() { |
Elliott Hughes | 4caba61 | 2013-01-14 15:48:27 -0800 | [diff] [blame] | 192 | return android.text.format.DateFormat.getTimeFormat(getContext()); |
Joe Onorato | c83bb73 | 2010-01-19 16:32:22 -0800 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | private DateFormat getDateFormat() { |
| 196 | String format = Settings.System.getString(getContext().getContentResolver(), |
| 197 | Settings.System.DATE_FORMAT); |
Joe Onorato | 7747210 | 2010-02-01 18:14:15 -0500 | [diff] [blame] | 198 | if (format == null || "".equals(format)) { |
Joe Onorato | c83bb73 | 2010-01-19 16:32:22 -0800 | [diff] [blame] | 199 | return DateFormat.getDateInstance(DateFormat.SHORT); |
| 200 | } else { |
Adam Powell | f3311c9 | 2010-03-23 17:32:41 -0700 | [diff] [blame] | 201 | try { |
| 202 | return new SimpleDateFormat(format); |
| 203 | } catch (IllegalArgumentException e) { |
| 204 | // If we tried to use a bad format string, fall back to a default. |
| 205 | return DateFormat.getDateInstance(DateFormat.SHORT); |
| 206 | } |
Joe Onorato | c83bb73 | 2010-01-19 16:32:22 -0800 | [diff] [blame] | 207 | } |
| 208 | } |
| 209 | |
| 210 | private void registerReceivers() { |
| 211 | Context context = getContext(); |
| 212 | |
| 213 | IntentFilter filter = new IntentFilter(); |
| 214 | filter.addAction(Intent.ACTION_TIME_TICK); |
| 215 | filter.addAction(Intent.ACTION_TIME_CHANGED); |
| 216 | filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED); |
| 217 | filter.addAction(Intent.ACTION_TIMEZONE_CHANGED); |
| 218 | context.registerReceiver(mBroadcastReceiver, filter); |
| 219 | |
| 220 | Uri uri = Settings.System.getUriFor(Settings.System.DATE_FORMAT); |
| 221 | context.getContentResolver().registerContentObserver(uri, true, mContentObserver); |
| 222 | } |
| 223 | |
| 224 | private void unregisterReceivers() { |
| 225 | Context context = getContext(); |
| 226 | context.unregisterReceiver(mBroadcastReceiver); |
| 227 | context.getContentResolver().unregisterContentObserver(mContentObserver); |
| 228 | } |
| 229 | |
| 230 | private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { |
| 231 | @Override |
| 232 | public void onReceive(Context context, Intent intent) { |
| 233 | String action = intent.getAction(); |
| 234 | if (Intent.ACTION_TIME_TICK.equals(action)) { |
| 235 | if (System.currentTimeMillis() < mUpdateTimeMillis) { |
| 236 | // The update() function takes a few milliseconds to run because of |
| 237 | // all of the time conversions it needs to do, so we can't do that |
| 238 | // every minute. |
| 239 | return; |
| 240 | } |
| 241 | } |
| 242 | // ACTION_TIME_CHANGED can also signal a change of 12/24 hr. format. |
| 243 | mLastFormat = null; |
| 244 | update(); |
| 245 | } |
| 246 | }; |
| 247 | |
| 248 | private ContentObserver mContentObserver = new ContentObserver(new Handler()) { |
| 249 | @Override |
| 250 | public void onChange(boolean selfChange) { |
| 251 | mLastFormat = null; |
| 252 | update(); |
| 253 | } |
| 254 | }; |
| 255 | } |