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.view.View; 38 import android.widget.TextView; 39 40 import java.text.SimpleDateFormat; 41 import java.util.Calendar; 42 import java.util.TimeZone; 43 44 import com.android.internal.R; 45 46 /** 47 * This widget display an analogic clock with two hands for hours and 48 * minutes. 49 */ 50 public class Clock extends TextView { 51 private boolean mAttached; 52 private Calendar mCalendar; 53 private String mClockFormatString; 54 private SimpleDateFormat mClockFormat; 55 56 private static final int AM_PM_STYLE_NORMAL = 0; 57 private static final int AM_PM_STYLE_SMALL = 1; 58 private static final int AM_PM_STYLE_GONE = 2; 59 60 private static final int AM_PM_STYLE = AM_PM_STYLE_GONE; 61 62 public Clock(Context context) { 63 this(context, null); 64 } 65 66 public Clock(Context context, AttributeSet attrs) { 67 this(context, attrs, 0); 68 } 69 70 public Clock(Context context, AttributeSet attrs, int defStyle) { 71 super(context, attrs, defStyle); 72 } 73 74 @Override 75 protected void onAttachedToWindow() { 76 super.onAttachedToWindow(); 77 78 if (!mAttached) { 79 mAttached = true; 80 IntentFilter filter = new IntentFilter(); 81 82 filter.addAction(Intent.ACTION_TIME_TICK); 83 filter.addAction(Intent.ACTION_TIME_CHANGED); 84 filter.addAction(Intent.ACTION_TIMEZONE_CHANGED); 85 filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED); 86 87 getContext().registerReceiver(mIntentReceiver, filter, null, getHandler()); 88 } 89 90 // NOTE: It's safe to do these after registering the receiver since the receiver always runs 91 // in the main thread, therefore the receiver can't run before this method returns. 92 93 // The time zone may have changed while the receiver wasn't registered, so update the Time 94 mCalendar = Calendar.getInstance(TimeZone.getDefault()); 95 96 // Make sure we update to the current time 97 updateClock(); 98 } 99 100 @Override 101 protected void onDetachedFromWindow() { 102 super.onDetachedFromWindow(); 103 if (mAttached) { 104 getContext().unregisterReceiver(mIntentReceiver); 105 mAttached = false; 106 } 107 } 108 109 private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() { 110 @Override 111 public void onReceive(Context context, Intent intent) { 112 String action = intent.getAction(); 113 if (action.equals(Intent.ACTION_TIMEZONE_CHANGED)) { 114 String tz = intent.getStringExtra("time-zone"); 115 mCalendar = Calendar.getInstance(TimeZone.getTimeZone(tz)); 116 if (mClockFormat != null) { 117 mClockFormat.setTimeZone(mCalendar.getTimeZone()); 118 } 119 } 120 updateClock(); 121 } 122 }; 123 124 final void updateClock() { 125 mCalendar.setTimeInMillis(System.currentTimeMillis()); 126 setText(getSmallTime()); 127 } 128 129 private final CharSequence getSmallTime() { 130 Context context = getContext(); 131 boolean b24 = DateFormat.is24HourFormat(context); 132 int res; 133 134 if (b24) { 135 res = R.string.twenty_four_hour_time_format; 136 } else { 137 res = R.string.twelve_hour_time_format; 138 } 139 140 final char MAGIC1 = '\uEF00'; 141 final char MAGIC2 = '\uEF01'; 142 143 SimpleDateFormat sdf; 144 String format = context.getString(res); 145 if (!format.equals(mClockFormatString)) { 146 /* 147 * Search for an unquoted "a" in the format string, so we can 148 * add dummy characters around it to let us find it again after 149 * formatting and change its size. 150 */ 151 if (AM_PM_STYLE != AM_PM_STYLE_NORMAL) { 152 int a = -1; 153 boolean quoted = false; 154 for (int i = 0; i < format.length(); i++) { 155 char c = format.charAt(i); 156 157 if (c == '\'') { 158 quoted = !quoted; 159 } 160 if (!quoted && c == 'a') { 161 a = i; 162 break; 163 } 164 } 165 166 if (a >= 0) { 167 // Move a back so any whitespace before AM/PM is also in the alternate size. 168 final int b = a; 169 while (a > 0 && Character.isWhitespace(format.charAt(a-1))) { 170 a--; 171 } 172 format = format.substring(0, a) + MAGIC1 + format.substring(a, b) 173 + "a" + MAGIC2 + format.substring(b + 1); 174 } 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