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 17package android.widget; 18 19import android.content.Context; 20import android.database.ContentObserver; 21import android.os.Handler; 22import android.os.SystemClock; 23import android.provider.Settings; 24import android.text.format.DateFormat; 25import android.util.AttributeSet; 26import android.view.accessibility.AccessibilityEvent; 27import android.view.accessibility.AccessibilityNodeInfo; 28 29import java.util.Calendar; 30 31/** 32 * Like AnalogClock, but digital. Shows seconds. 33 * 34 * @deprecated It is recommended you use {@link TextClock} instead. 35 */ 36@Deprecated 37public class DigitalClock extends TextView { 38 // FIXME: implement separate views for hours/minutes/seconds, so 39 // proportional fonts don't shake rendering 40 41 Calendar mCalendar; 42 private final static String m12 = "h:mm:ss aa"; 43 private final static String m24 = "k:mm:ss"; 44 @SuppressWarnings("FieldCanBeLocal") // We must keep a reference to this observer 45 private FormatChangeObserver mFormatChangeObserver; 46 47 private Runnable mTicker; 48 private Handler mHandler; 49 50 private boolean mTickerStopped = false; 51 52 String mFormat; 53 54 public DigitalClock(Context context) { 55 super(context); 56 initClock(); 57 } 58 59 public DigitalClock(Context context, AttributeSet attrs) { 60 super(context, attrs); 61 initClock(); 62 } 63 64 private void initClock() { 65 if (mCalendar == null) { 66 mCalendar = Calendar.getInstance(); 67 } 68 69 mFormatChangeObserver = new FormatChangeObserver(); 70 getContext().getContentResolver().registerContentObserver( 71 Settings.System.CONTENT_URI, true, mFormatChangeObserver); 72 73 setFormat(); 74 } 75 76 @Override 77 protected void onAttachedToWindow() { 78 mTickerStopped = false; 79 super.onAttachedToWindow(); 80 mHandler = new Handler(); 81 82 /** 83 * requests a tick on the next hard-second boundary 84 */ 85 mTicker = new Runnable() { 86 public void run() { 87 if (mTickerStopped) return; 88 mCalendar.setTimeInMillis(System.currentTimeMillis()); 89 setText(DateFormat.format(mFormat, mCalendar)); 90 invalidate(); 91 long now = SystemClock.uptimeMillis(); 92 long next = now + (1000 - now % 1000); 93 mHandler.postAtTime(mTicker, next); 94 } 95 }; 96 mTicker.run(); 97 } 98 99 @Override 100 protected void onDetachedFromWindow() { 101 super.onDetachedFromWindow(); 102 mTickerStopped = true; 103 } 104 105 /** 106 * Pulls 12/24 mode from system settings 107 */ 108 private boolean get24HourMode() { 109 return android.text.format.DateFormat.is24HourFormat(getContext()); 110 } 111 112 private void setFormat() { 113 if (get24HourMode()) { 114 mFormat = m24; 115 } else { 116 mFormat = m12; 117 } 118 } 119 120 private class FormatChangeObserver extends ContentObserver { 121 public FormatChangeObserver() { 122 super(new Handler()); 123 } 124 125 @Override 126 public void onChange(boolean selfChange) { 127 setFormat(); 128 } 129 } 130 131 @Override 132 public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 133 super.onInitializeAccessibilityEvent(event); 134 //noinspection deprecation 135 event.setClassName(DigitalClock.class.getName()); 136 } 137 138 @Override 139 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 140 super.onInitializeAccessibilityNodeInfo(info); 141 //noinspection deprecation 142 info.setClassName(DigitalClock.class.getName()); 143 } 144} 145