1 /* 2 * Copyright (C) 2015 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.deskclock; 18 19 import android.content.BroadcastReceiver; 20 import android.content.Context; 21 import android.content.Intent; 22 import android.content.IntentFilter; 23 import androidx.appcompat.widget.AppCompatImageView; 24 import android.text.format.DateFormat; 25 import android.util.AttributeSet; 26 import android.widget.FrameLayout; 27 import android.widget.ImageView; 28 29 import java.text.SimpleDateFormat; 30 import java.util.Calendar; 31 import java.util.TimeZone; 32 33 import static android.text.format.DateUtils.SECOND_IN_MILLIS; 34 35 /** 36 * This widget display an analog clock with two hands for hours and minutes. 37 */ 38 public class AnalogClock extends FrameLayout { 39 40 private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() { 41 @Override 42 public void onReceive(Context context, Intent intent) { 43 if (mTimeZone == null && Intent.ACTION_TIMEZONE_CHANGED.equals(intent.getAction())) { 44 final String tz = intent.getStringExtra("time-zone"); 45 mTime = Calendar.getInstance(TimeZone.getTimeZone(tz)); 46 } 47 onTimeChanged(); 48 } 49 }; 50 51 private final Runnable mClockTick = new Runnable() { 52 @Override 53 public void run() { 54 onTimeChanged(); 55 56 if (mEnableSeconds) { 57 final long now = System.currentTimeMillis(); 58 final long delay = SECOND_IN_MILLIS - now % SECOND_IN_MILLIS; 59 postDelayed(this, delay); 60 } 61 } 62 }; 63 64 private final ImageView mHourHand; 65 private final ImageView mMinuteHand; 66 private final ImageView mSecondHand; 67 68 private Calendar mTime; 69 private String mDescFormat; 70 private TimeZone mTimeZone; 71 private boolean mEnableSeconds = true; 72 AnalogClock(Context context)73 public AnalogClock(Context context) { 74 this(context, null /* attrs */); 75 } 76 AnalogClock(Context context, AttributeSet attrs)77 public AnalogClock(Context context, AttributeSet attrs) { 78 this(context, attrs, 0 /* defStyleAttr */); 79 } 80 AnalogClock(Context context, AttributeSet attrs, int defStyleAttr)81 public AnalogClock(Context context, AttributeSet attrs, int defStyleAttr) { 82 super(context, attrs, defStyleAttr); 83 84 mTime = Calendar.getInstance(); 85 mDescFormat = ((SimpleDateFormat) DateFormat.getTimeFormat(context)).toLocalizedPattern(); 86 87 // Must call mutate on these instances, otherwise the drawables will blur, because they're 88 // sharing their size characteristics with the (smaller) world cities analog clocks. 89 final ImageView dial = new AppCompatImageView(context); 90 dial.setImageResource(R.drawable.clock_analog_dial); 91 dial.getDrawable().mutate(); 92 addView(dial); 93 94 mHourHand = new AppCompatImageView(context); 95 mHourHand.setImageResource(R.drawable.clock_analog_hour); 96 mHourHand.getDrawable().mutate(); 97 addView(mHourHand); 98 99 mMinuteHand = new AppCompatImageView(context); 100 mMinuteHand.setImageResource(R.drawable.clock_analog_minute); 101 mMinuteHand.getDrawable().mutate(); 102 addView(mMinuteHand); 103 104 mSecondHand = new AppCompatImageView(context); 105 mSecondHand.setImageResource(R.drawable.clock_analog_second); 106 mSecondHand.getDrawable().mutate(); 107 addView(mSecondHand); 108 } 109 110 @Override onAttachedToWindow()111 protected void onAttachedToWindow() { 112 super.onAttachedToWindow(); 113 114 final IntentFilter filter = new IntentFilter(); 115 filter.addAction(Intent.ACTION_TIME_TICK); 116 filter.addAction(Intent.ACTION_TIME_CHANGED); 117 filter.addAction(Intent.ACTION_TIMEZONE_CHANGED); 118 getContext().registerReceiver(mIntentReceiver, filter); 119 120 // Refresh the calendar instance since the time zone may have changed while the receiver 121 // wasn't registered. 122 mTime = Calendar.getInstance(mTimeZone != null ? mTimeZone : TimeZone.getDefault()); 123 onTimeChanged(); 124 125 // Tick every second. 126 if (mEnableSeconds) { 127 mClockTick.run(); 128 } 129 } 130 131 @Override onDetachedFromWindow()132 protected void onDetachedFromWindow() { 133 super.onDetachedFromWindow(); 134 135 getContext().unregisterReceiver(mIntentReceiver); 136 removeCallbacks(mClockTick); 137 } 138 onTimeChanged()139 private void onTimeChanged() { 140 mTime.setTimeInMillis(System.currentTimeMillis()); 141 final float hourAngle = mTime.get(Calendar.HOUR) * 30f; 142 mHourHand.setRotation(hourAngle); 143 final float minuteAngle = mTime.get(Calendar.MINUTE) * 6f; 144 mMinuteHand.setRotation(minuteAngle); 145 if (mEnableSeconds) { 146 final float secondAngle = mTime.get(Calendar.SECOND) * 6f; 147 mSecondHand.setRotation(secondAngle); 148 } 149 setContentDescription(DateFormat.format(mDescFormat, mTime)); 150 invalidate(); 151 } 152 setTimeZone(String id)153 public void setTimeZone(String id) { 154 mTimeZone = TimeZone.getTimeZone(id); 155 mTime.setTimeZone(mTimeZone); 156 onTimeChanged(); 157 } 158 enableSeconds(boolean enable)159 public void enableSeconds(boolean enable) { 160 mEnableSeconds = enable; 161 if (mEnableSeconds) { 162 mSecondHand.setVisibility(VISIBLE); 163 mClockTick.run(); 164 } else { 165 mSecondHand.setVisibility(GONE); 166 } 167 } 168 } 169