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 java.util.Calendar; 27 28 /** 29 * Like AnalogClock, but digital. Shows seconds. 30 * 31 * @deprecated It is recommended you use {@link TextClock} instead. 32 */ 33 @Deprecated 34 public class DigitalClock extends TextView { 35 // FIXME: implement separate views for hours/minutes/seconds, so 36 // proportional fonts don't shake rendering 37 38 Calendar mCalendar; 39 @SuppressWarnings("FieldCanBeLocal") // We must keep a reference to this observer 40 private FormatChangeObserver mFormatChangeObserver; 41 42 private Runnable mTicker; 43 private Handler mHandler; 44 45 private boolean mTickerStopped = false; 46 47 String mFormat; 48 DigitalClock(Context context)49 public DigitalClock(Context context) { 50 super(context); 51 initClock(); 52 } 53 DigitalClock(Context context, AttributeSet attrs)54 public DigitalClock(Context context, AttributeSet attrs) { 55 super(context, attrs); 56 initClock(); 57 } 58 initClock()59 private void initClock() { 60 if (mCalendar == null) { 61 mCalendar = Calendar.getInstance(); 62 } 63 } 64 65 @Override onAttachedToWindow()66 protected void onAttachedToWindow() { 67 mTickerStopped = false; 68 super.onAttachedToWindow(); 69 70 mFormatChangeObserver = new FormatChangeObserver(); 71 getContext().getContentResolver().registerContentObserver( 72 Settings.System.CONTENT_URI, true, mFormatChangeObserver); 73 setFormat(); 74 75 mHandler = new Handler(); 76 77 /** 78 * requests a tick on the next hard-second boundary 79 */ 80 mTicker = new Runnable() { 81 public void run() { 82 if (mTickerStopped) return; 83 mCalendar.setTimeInMillis(System.currentTimeMillis()); 84 setText(DateFormat.format(mFormat, mCalendar)); 85 invalidate(); 86 long now = SystemClock.uptimeMillis(); 87 long next = now + (1000 - now % 1000); 88 mHandler.postAtTime(mTicker, next); 89 } 90 }; 91 mTicker.run(); 92 } 93 94 @Override onDetachedFromWindow()95 protected void onDetachedFromWindow() { 96 super.onDetachedFromWindow(); 97 mTickerStopped = true; 98 getContext().getContentResolver().unregisterContentObserver( 99 mFormatChangeObserver); 100 } 101 setFormat()102 private void setFormat() { 103 mFormat = DateFormat.getTimeFormatString(getContext()); 104 } 105 106 private class FormatChangeObserver extends ContentObserver { FormatChangeObserver()107 public FormatChangeObserver() { 108 super(new Handler()); 109 } 110 111 @Override onChange(boolean selfChange)112 public void onChange(boolean selfChange) { 113 setFormat(); 114 } 115 } 116 117 @Override getAccessibilityClassName()118 public CharSequence getAccessibilityClassName() { 119 //noinspection deprecation 120 return DigitalClock.class.getName(); 121 } 122 } 123