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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.keyguard;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.ContentObserver;
import android.graphics.Typeface;
import android.os.Handler;
import android.os.UserHandle;
import android.provider.Settings;
import android.text.format.DateFormat;
import android.util.AttributeSet;
import android.view.View;
import android.widget.RelativeLayout;
import android.widget.TextView;
import java.lang.ref.WeakReference;
import java.text.DateFormatSymbols;
import java.util.Calendar;
/**
* Displays the time
*/
public class ClockView extends RelativeLayout {
private static final String ANDROID_CLOCK_FONT_FILE = "/system/fonts/AndroidClock.ttf";
private final static String M12 = "h:mm";
private final static String M24 = "kk:mm";
private Calendar mCalendar;
private String mFormat;
private TextView mTimeView;
private AmPm mAmPm;
private ContentObserver mFormatChangeObserver;
private int mAttached = 0; // for debugging - tells us whether attach/detach is unbalanced
/* called by system on minute ticks */
private final Handler mHandler = new Handler();
private BroadcastReceiver mIntentReceiver;
private static class TimeChangedReceiver extends BroadcastReceiver {
private WeakReference<ClockView> mClock;
private Context mContext;
public TimeChangedReceiver(ClockView clock) {
mClock = new WeakReference<ClockView>(clock);
mContext = clock.getContext();
}
@Override
public void onReceive(Context context, Intent intent) {
// Post a runnable to avoid blocking the broadcast.
final boolean timezoneChanged =
intent.getAction().equals(Intent.ACTION_TIMEZONE_CHANGED);
final ClockView clock = mClock.get();
if (clock != null) {
clock.mHandler.post(new Runnable() {
public void run() {
if (timezoneChanged) {
clock.mCalendar = Calendar.getInstance();
}
clock.updateTime();
}
});
} else {
try {
mContext.unregisterReceiver(this);
} catch (RuntimeException e) {
// Shouldn't happen
}
}
}
};
static class AmPm {
private TextView mAmPmTextView;
private String mAmString, mPmString;
AmPm(View parent, Typeface tf) {
// No longer used, uncomment if we decide to use AM/PM indicator again
// mAmPmTextView = (TextView) parent.findViewById(R.id.am_pm);
if (mAmPmTextView != null && tf != null) {
mAmPmTextView.setTypeface(tf);
}
String[] ampm = new DateFormatSymbols().getAmPmStrings();
mAmString = ampm[0];
mPmString = ampm[1];
}
void setShowAmPm(boolean show) {
if (mAmPmTextView != null) {
mAmPmTextView.setVisibility(show ? View.VISIBLE : View.GONE);
}
}
void setIsMorning(boolean isMorning) {
if (mAmPmTextView != null) {
mAmPmTextView.setText(isMorning ? mAmString : mPmString);
}
}
}
private static class FormatChangeObserver extends ContentObserver {
private WeakReference<ClockView> mClock;
private Context mContext;
public FormatChangeObserver(ClockView clock) {
super(new Handler());
mClock = new WeakReference<ClockView>(clock);
mContext = clock.getContext();
}
@Override
public void onChange(boolean selfChange) {
ClockView digitalClock = mClock.get();
if (digitalClock != null) {
digitalClock.setDateFormat();
digitalClock.updateTime();
} else {
try {
mContext.getContentResolver().unregisterContentObserver(this);
} catch (RuntimeException e) {
// Shouldn't happen
}
}
}
}
public ClockView(Context context) {
this(context, null);
}
public ClockView(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mTimeView = (TextView) findViewById(R.id.clock_text);
mTimeView.setTypeface(Typeface.createFromFile(ANDROID_CLOCK_FONT_FILE));
mAmPm = new AmPm(this, null);
mCalendar = Calendar.getInstance();
setDateFormat();
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
mAttached++;
/* monitor time ticks, time changed, timezone */
if (mIntentReceiver == null) {
mIntentReceiver = new TimeChangedReceiver(this);
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_TIME_TICK);
filter.addAction(Intent.ACTION_TIME_CHANGED);
filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
mContext.registerReceiverAsUser(mIntentReceiver, UserHandle.OWNER, filter, null, null );
}
/* monitor 12/24-hour display preference */
if (mFormatChangeObserver == null) {
mFormatChangeObserver = new FormatChangeObserver(this);
mContext.getContentResolver().registerContentObserver(
Settings.System.CONTENT_URI, true, mFormatChangeObserver);
}
updateTime();
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
mAttached--;
if (mIntentReceiver != null) {
mContext.unregisterReceiver(mIntentReceiver);
}
if (mFormatChangeObserver != null) {
mContext.getContentResolver().unregisterContentObserver(
mFormatChangeObserver);
}
mFormatChangeObserver = null;
mIntentReceiver = null;
}
void updateTime(Calendar c) {
mCalendar = c;
updateTime();
}
public void updateTime() {
mCalendar.setTimeInMillis(System.currentTimeMillis());
CharSequence newTime = DateFormat.format(mFormat, mCalendar);
mTimeView.setText(newTime);
mAmPm.setIsMorning(mCalendar.get(Calendar.AM_PM) == 0);
}
private void setDateFormat() {
mFormat = android.text.format.DateFormat.is24HourFormat(getContext()) ? M24 : M12;
mAmPm.setShowAmPm(mFormat.equals(M12));
}
}
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