1 /* 2 * Copyright (C) 2006 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.Resources; 24 import android.content.res.TypedArray; 25 import android.graphics.Canvas; 26 import android.graphics.Typeface; 27 import android.graphics.drawable.Drawable; 28 import android.text.Spannable; 29 import android.text.SpannableStringBuilder; 30 import android.text.format.DateFormat; 31 import android.text.style.CharacterStyle; 32 import android.text.style.ForegroundColorSpan; 33 import android.text.style.RelativeSizeSpan; 34 import android.text.style.RelativeSizeSpan; 35 import android.text.style.StyleSpan; 36 import android.util.AttributeSet; 37 import android.util.Slog; 38 import android.view.View; 39 import android.widget.TextView; 40 41 import java.text.SimpleDateFormat; 42 import java.util.Calendar; 43 import java.util.TimeZone; 44 45 import com.android.internal.R; 46 47 /** 48 * This widget display an analogic clock with two hands for hours and 49 * minutes. 50 */ 51 public class Clock extends TextView { 52 private boolean mAttached; 53 private Calendar mCalendar; 54 private String mClockFormatString; 55 private SimpleDateFormat mClockFormat; 56 57 private static final int AM_PM_STYLE_NORMAL = 0; 58 private static final int AM_PM_STYLE_SMALL = 1; 59 private static final int AM_PM_STYLE_GONE = 2; 60 61 private static final int AM_PM_STYLE = AM_PM_STYLE_GONE; 62 63 public Clock(Context context) { 64 this(context, null); 65 } 66 67 public Clock(Context context, AttributeSet attrs) { 68 this(context, attrs, 0); 69 } 70 71 public Clock(Context context, AttributeSet attrs, int defStyle) { 72 super(context, attrs, defStyle); 73 } 74 75 @Override 76 protected void onAttachedToWindow() { 77 super.onAttachedToWindow(); 78 79 if (!mAttached) { 80 mAttached = true; 81 IntentFilter filter = new IntentFilter(); 82 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_CONFIGURATION_CHANGED); 87 88 getContext().registerReceiver(mIntentReceiver, filter, null, getHandler()); 89 } 90 91 // NOTE: It's safe to do these after registering the receiver since the receiver always runs 92 // in the main thread, therefore the receiver can't run before this method returns. 93 94 // The time zone may have changed while the receiver wasn't registered, so update the Time 95 mCalendar = Calendar.getInstance(TimeZone.getDefault()); 96 97 // Make sure we update to the current time 98 updateClock(); 99 } 100 101 @Override 102 protected void onDetachedFromWindow() { 103 super.onDetachedFromWindow(); 104 if (mAttached) { 105 getContext().unregisterReceiver(mIntentReceiver); 106 mAttached = false; 107 } 108 } 109 110 private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() { 111 @Override 112 public void onReceive(Context context, Intent intent) { 113 String action = intent.getAction(); 114 if (action.equals(Intent.ACTION_TIMEZONE_CHANGED)) { 115 String tz = intent.getStringExtra("time-zone"); 116 mCalendar = Calendar.getInstance(TimeZone.getTimeZone(tz)); 117 if (mClockFormat != null) { 118 mClockFormat.setTimeZone(mCalendar.getTimeZone()); 119 } 120 } 121 updateClock(); 122 } 123 }; 124 125 final void updateClock() { 126 mCalendar.setTimeInMillis(System.currentTimeMillis()); 127 setText(getSmallTime()); 128 } 129 130 private final CharSequence getSmallTime() { 131 Context context = getContext(); 132 boolean b24 = DateFormat.is24HourFormat(context); 133 int res; 134 135 if (b24) { 136 res = R.string.twenty_four_hour_time_format; 137 } else { 138 res = R.string.twelve_hour_time_format; 139 } 140 141 final char MAGIC1 = '\uEF00'; 142 final char MAGIC2 = '\uEF01'; 143 144 SimpleDateFormat sdf; 145 String format = context.getString(res); 146 if (!format.equals(mClockFormatString)) { 147 /* 148 * Search for an unquoted "a" in the format string, so we can 149 * add dummy characters around it to let us find it again after 150 * formatting and change its size. 151 */ 152 if (AM_PM_STYLE != AM_PM_STYLE_NORMAL) { 153 int a = -1; 154 boolean quoted = false; 155 for (int i = 0; i < format.length(); i++) { 156 char c = format.charAt(i); 157 158 if (c == '\'') { 159 quoted = !quoted; 160 } 161 if (!quoted && c == 'a') { 162 a = i; 163 break; 164 } 165 } 166 167 if (a >= 0) { 168 // Move a back so any whitespace before AM/PM is also in the alternate size. 169 final int b = a; 170 while (a > 0 && Character.isWhitespace(format.charAt(a-1))) { 171 a--; 172 } 173 format = format.substring(0, a) + MAGIC1 + format.substring(a, b) 174 + "a" + MAGIC2 + format.substring(b + 1); 175 } 176 } 177 mClockFormat = sdf = new SimpleDateFormat(format); 178 mClockFormatString = format; 179 } else { 180 sdf = mClockFormat; 181 } 182 String result = sdf.format(mCalendar.getTime()); 183 184 if (AM_PM_STYLE != AM_PM_STYLE_NORMAL) { 185 int magic1 = result.indexOf(MAGIC1); 186 int magic2 = result.indexOf(MAGIC2); 187 if (magic1 >= 0 && magic2 > magic1) { 188 SpannableStringBuilder formatted = new SpannableStringBuilder(result); 189 if (AM_PM_STYLE == AM_PM_STYLE_GONE) { 190 formatted.delete(magic1, magic2+1); 191 } else { 192 if (AM_PM_STYLE == AM_PM_STYLE_SMALL) { 193 CharacterStyle style = new RelativeSizeSpan(0.7f); 194 formatted.setSpan(style, magic1, magic2, 195 Spannable.SPAN_EXCLUSIVE_INCLUSIVE); 196 } 197 formatted.delete(magic2, magic2 + 1); 198 formatted.delete(magic1, magic1 + 1); 199 } 200 return formatted; 201 } 202 } 203 204 return result; 205 206 } 207 } 208 209