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 android.widget; 18 19 import android.content.Context; 20 import android.database.ContentObserver; 21 import android.os.Handler; 22 import android.os.SystemClock; 23 import android.provider.Settings; 24 import android.text.format.DateFormat; 25 import android.util.AttributeSet; 26 import android.view.accessibility.AccessibilityEvent; 27 import android.view.accessibility.AccessibilityNodeInfo; 28 29 import 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 37 public 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 @SuppressWarnings("FieldCanBeLocal") // We must keep a reference to this observer 43 private FormatChangeObserver mFormatChangeObserver; 44 45 private Runnable mTicker; 46 private Handler mHandler; 47 48 private boolean mTickerStopped = false; 49 50 String mFormat; 51 DigitalClock(Context context)52 public DigitalClock(Context context) { 53 super(context); 54 initClock(); 55 } 56 DigitalClock(Context context, AttributeSet attrs)57 public DigitalClock(Context context, AttributeSet attrs) { 58 super(context, attrs); 59 initClock(); 60 } 61 initClock()62 private void initClock() { 63 if (mCalendar == null) { 64 mCalendar = Calendar.getInstance(); 65 } 66 67 mFormatChangeObserver = new FormatChangeObserver(); 68 getContext().getContentResolver().registerContentObserver( 69 Settings.System.CONTENT_URI, true, mFormatChangeObserver); 70 71 setFormat(); 72 } 73 74 @Override onAttachedToWindow()75 protected void onAttachedToWindow() { 76 mTickerStopped = false; 77 super.onAttachedToWindow(); 78 mHandler = new Handler(); 79 80 /** 81 * requests a tick on the next hard-second boundary 82 */ 83 mTicker = new Runnable() { 84 public void run() { 85 if (mTickerStopped) return; 86 mCalendar.setTimeInMillis(System.currentTimeMillis()); 87 setText(DateFormat.format(mFormat, mCalendar)); 88 invalidate(); 89 long now = SystemClock.uptimeMillis(); 90 long next = now + (1000 - now % 1000); 91 mHandler.postAtTime(mTicker, next); 92 } 93 }; 94 mTicker.run(); 95 } 96 97 @Override onDetachedFromWindow()98 protected void onDetachedFromWindow() { 99 super.onDetachedFromWindow(); 100 mTickerStopped = true; 101 } 102 setFormat()103 private void setFormat() { 104 mFormat = DateFormat.getTimeFormatString(getContext()); 105 } 106 107 private class FormatChangeObserver extends ContentObserver { FormatChangeObserver()108 public FormatChangeObserver() { 109 super(new Handler()); 110 } 111 112 @Override onChange(boolean selfChange)113 public void onChange(boolean selfChange) { 114 setFormat(); 115 } 116 } 117 118 @Override onInitializeAccessibilityEvent(AccessibilityEvent event)119 public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 120 super.onInitializeAccessibilityEvent(event); 121 //noinspection deprecation 122 event.setClassName(DigitalClock.class.getName()); 123 } 124 125 @Override onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info)126 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 127 super.onInitializeAccessibilityNodeInfo(info); 128 //noinspection deprecation 129 info.setClassName(DigitalClock.class.getName()); 130 } 131 } 132