Improve gallery
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/*
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* Copyright (C) 2014 Hippo Seven
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.hippo.widget;
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import android.content.BroadcastReceiver;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.database.ContentObserver;
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import android.net.Uri;
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import android.os.Build;
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import android.os.Handler;
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import android.os.SystemClock;
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import android.provider.Settings;
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import android.text.format.DateFormat;
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import android.util.AttributeSet;
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import android.view.ViewDebug.ExportedProperty;
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import android.widget.TextView;
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import java.util.Calendar;
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import java.util.TimeZone;
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public class TextClock extends TextView {
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public static final CharSequence DEFAULT_FORMAT_12_HOUR = "hh:mm a";
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public static final CharSequence DEFAULT_FORMAT_24_HOUR;
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static {
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if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2)
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DEFAULT_FORMAT_24_HOUR = "kk:mm";
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else
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DEFAULT_FORMAT_24_HOUR = "HH:mm";
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}
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private CharSequence mFormat12;
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private CharSequence mFormat24;
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@ExportedProperty
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private CharSequence mFormat;
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@ExportedProperty
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private boolean mHasSeconds;
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private boolean mAttached;
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private Calendar mTime;
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private String mTimeZone;
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private final ContentObserver mFormatChangeObserver = new ContentObserver(new Handler()) {
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@Override
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public void onChange(boolean selfChange) {
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chooseFormat();
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onTimeChanged();
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}
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@Override
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public void onChange(boolean selfChange, Uri uri) {
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chooseFormat();
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onTimeChanged();
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}
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};
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private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) {
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if (mTimeZone == null && Intent.ACTION_TIMEZONE_CHANGED.equals(intent.getAction())) {
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final String timeZone = intent.getStringExtra("time-zone");
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createTime(timeZone);
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}
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onTimeChanged();
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}
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};
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private final Runnable mTicker = new Runnable() {
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@Override
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public void run() {
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onTimeChanged();
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long now = SystemClock.uptimeMillis();
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long next = now + (1000 - now % 1000);
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getHandler().postAtTime(mTicker, next);
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}
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};
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public TextClock(Context context) {
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this(context, null);
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}
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public TextClock(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public TextClock(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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mFormat12 = DEFAULT_FORMAT_12_HOUR;
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mFormat24 = DEFAULT_FORMAT_24_HOUR;
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mTimeZone = TimeZone.getDefault().getID();
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init();
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}
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private void init() {
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createTime(mTimeZone);
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// Wait until onAttachedToWindow() to handle the ticker
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chooseFormat(false);
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}
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private void createTime(String timeZone) {
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if (timeZone != null) {
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mTime = Calendar.getInstance(TimeZone.getTimeZone(timeZone));
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} else {
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mTime = Calendar.getInstance();
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}
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}
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public CharSequence getFormat12Hour() {
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return mFormat12;
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}
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public void setFormat12Hour(CharSequence format) {
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mFormat12 = format;
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chooseFormat();
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onTimeChanged();
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}
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public CharSequence getFormat24Hour() {
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return mFormat24;
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}
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public void setFormat24Hour(CharSequence format) {
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mFormat24 = format;
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chooseFormat();
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onTimeChanged();
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}
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public boolean is24HourModeEnabled() {
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return DateFormat.is24HourFormat(getContext());
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}
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public String getTimeZone() {
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return mTimeZone;
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}
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public void setTimeZone(String timeZone) {
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mTimeZone = timeZone;
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createTime(timeZone);
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onTimeChanged();
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}
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/**
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* Selects either one of {@link #getFormat12Hour()} or {@link #getFormat24Hour()}
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* depending on whether the user has selected 24-hour format.
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*
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* Calling this method does not schedule or unschedule the time ticker.
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*/
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private void chooseFormat() {
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chooseFormat(true);
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}
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public CharSequence getFormat() {
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return mFormat;
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}
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/**
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* Selects either one of {@link #getFormat12Hour()} or {@link #getFormat24Hour()}
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* depending on whether the user has selected 24-hour format.
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*
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* @param handleTicker true if calling this method should schedule/unschedule the
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* time ticker, false otherwise
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*/
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private void chooseFormat(boolean handleTicker) {
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final boolean format24Requested = is24HourModeEnabled();
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if (format24Requested) {
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mFormat = mFormat24;
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} else {
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mFormat = mFormat12;
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}
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boolean hadSeconds = mHasSeconds;
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mHasSeconds = DateUtils.hasSeconds(mFormat);
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if (handleTicker && mAttached && hadSeconds != mHasSeconds) {
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if (hadSeconds) getHandler().removeCallbacks(mTicker);
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else mTicker.run();
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}
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}
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@Override
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protected void onAttachedToWindow() {
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super.onAttachedToWindow();
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if (!mAttached) {
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mAttached = true;
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registerReceiver();
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registerObserver();
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createTime(mTimeZone);
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if (mHasSeconds) {
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mTicker.run();
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} else {
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onTimeChanged();
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}
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}
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}
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@Override
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protected void onDetachedFromWindow() {
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super.onDetachedFromWindow();
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if (mAttached) {
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unregisterReceiver();
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unregisterObserver();
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getHandler().removeCallbacks(mTicker);
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mAttached = false;
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}
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}
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private void registerReceiver() {
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final IntentFilter filter = new IntentFilter();
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filter.addAction(Intent.ACTION_TIME_TICK);
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filter.addAction(Intent.ACTION_TIME_CHANGED);
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filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
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getContext().registerReceiver(mIntentReceiver, filter, null, getHandler());
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}
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private void registerObserver() {
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final ContentResolver resolver = getContext().getContentResolver();
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resolver.registerContentObserver(Settings.System.CONTENT_URI, true, mFormatChangeObserver);
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}
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private void unregisterReceiver() {
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getContext().unregisterReceiver(mIntentReceiver);
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}
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private void unregisterObserver() {
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final ContentResolver resolver = getContext().getContentResolver();
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resolver.unregisterContentObserver(mFormatChangeObserver);
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}
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private void onTimeChanged() {
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mTime.setTimeInMillis(System.currentTimeMillis());
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setText(DateFormat.format(mFormat, mTime));
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}
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}
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