mirror of https://github.com/moparisthebest/k-9
526 lines
18 KiB
Java
526 lines
18 KiB
Java
/*
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* Copyright (C) 2012 Christian Ketterer (cketti)
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*
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* Portions Copyright (C) 2012 Martin van Zuilekom (http://martin.cubeactive.com)
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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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*
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* Based on android-change-log:
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*
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* Copyright (C) 2011, Karsten Priegnitz
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*
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* Permission to use, copy, modify, and distribute this piece of software
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* for any purpose with or without fee is hereby granted, provided that
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* the above copyright notice and this permission notice appear in the
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* source code of all copies.
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*
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* It would be appreciated if you mention the author in your change log,
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* contributors list or the like.
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*
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* http://code.google.com/p/android-change-log/
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*/
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package de.cketti.library.changelog;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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import android.app.AlertDialog;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.SharedPreferences;
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import android.content.pm.PackageInfo;
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import android.content.pm.PackageManager.NameNotFoundException;
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import android.content.res.Resources;
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import android.content.res.XmlResourceParser;
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import android.preference.PreferenceManager;
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import android.util.Log;
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import android.util.SparseArray;
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import android.webkit.WebView;
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/**
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* Display a dialog showing a full or partial (What's New) change log.
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*/
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public class ChangeLog {
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/**
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* Tag that is used when sending error/debug messages to the log.
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*/
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protected static final String LOG_TAG = "ckChangeLog";
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/**
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* This is the key used when storing the version code in SharedPreferences.
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*/
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protected static final String VERSION_KEY = "ckChangeLog_last_version_code";
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/**
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* Constant that used when no version code is available.
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*/
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protected static final int NO_VERSION = -1;
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/**
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* Default CSS styles used to format the change log.
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*/
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private static final String DEFAULT_CSS =
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"h1 { margin-left: 0px; font-size: 1.2em;}" +
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"li { margin-left: 0px;}" +
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"ul { padding-left: 2em;}";
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/**
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* Context that is used to access the resources and to create the ChangeLog dialogs.
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*/
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protected final Context mContext;
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/**
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* Contains the CSS rules used to format the change log.
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*/
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protected final String mCss;
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/**
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* Last version code read from {@code SharedPreferences} or {@link #NO_VERSION}.
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*/
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private int mLastVersionCode;
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/**
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* Version code of the current installation.
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*/
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private int mCurrentVersionCode;
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/**
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* Version name of the current installation.
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*/
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private String mCurrentVersionName;
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/**
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* Contains constants for the root element of {@code changelog.xml}.
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*/
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protected interface ChangeLogTag {
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static final String NAME = "changelog";
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}
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/**
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* Contains constants for the release element of {@code changelog.xml}.
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*/
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protected interface ReleaseTag {
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static final String NAME = "release";
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static final String ATTRIBUTE_VERSION = "version";
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static final String ATTRIBUTE_VERSION_CODE = "versioncode";
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}
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/**
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* Contains constants for the change element of {@code changelog.xml}.
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*/
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protected interface ChangeTag {
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static final String NAME = "change";
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}
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/**
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* Create a {@code ChangeLog} instance using the default {@link SharedPreferences} file.
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*
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* @param context
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* Context that is used to access the resources and to create the ChangeLog dialogs.
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*/
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public ChangeLog(Context context) {
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this(context, PreferenceManager.getDefaultSharedPreferences(context), DEFAULT_CSS);
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}
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/**
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* Create a {@code ChangeLog} instance using the default {@link SharedPreferences} file.
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*
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* @param context
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* Context that is used to access the resources and to create the ChangeLog dialogs.
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* @param css
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* CSS styles that will be used to format the change log.
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*/
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public ChangeLog(Context context, String css) {
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this(context, PreferenceManager.getDefaultSharedPreferences(context), css);
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}
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/**
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* Create a {@code ChangeLog} instance using the supplied {@code SharedPreferences} instance.
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*
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* @param context
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* Context that is used to access the resources and to create the ChangeLog dialogs.
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* @param preferences
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* {@code SharedPreferences} instance that is used to persist the last version code.
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* @param css
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* CSS styles used to format the change log (excluding {@code <style>} and
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* {@code </style>}).
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*
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*/
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public ChangeLog(Context context, SharedPreferences preferences, String css) {
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mContext = context;
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mCss = css;
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// Get last version code
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mLastVersionCode = preferences.getInt(VERSION_KEY, NO_VERSION);
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// Get current version code and version name
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try {
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PackageInfo packageInfo = context.getPackageManager().getPackageInfo(
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context.getPackageName(), 0);
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mCurrentVersionCode = packageInfo.versionCode;
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mCurrentVersionName = packageInfo.versionName;
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} catch (NameNotFoundException e) {
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mCurrentVersionCode = NO_VERSION;
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Log.e(LOG_TAG, "Could not get version information from manifest!", e);
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}
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}
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/**
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* Get version code of last installation.
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*
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* @return The version code of the last installation of this app (as described in the former
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* manifest). This will be the same as returned by {@link #getCurrentVersionCode()} the
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* second time this version of the app is launched (more precisely: the second time
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* {@code ChangeLog} is instantiated).
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*
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* @see AndroidManifest.xml#android:versionCode
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*/
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public int getLastVersionCode() {
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return mLastVersionCode;
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}
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/**
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* Get version code of current installation.
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*
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* @return The version code of this app as described in the manifest.
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*
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* @see AndroidManifest.xml#android:versionCode
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*/
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public int getCurrentVersionCode() {
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return mCurrentVersionCode;
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}
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/**
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* Get version name of current installation.
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*
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* @return The version name of this app as described in the manifest.
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*
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* @see AndroidManifest.xml#android:versionName
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*/
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public String getCurrentVersionName() {
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return mCurrentVersionName;
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}
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/**
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* Check if this is the first execution of this app version.
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*
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* @return {@code true} if this version of your app is started the first time.
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*/
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public boolean isFirstRun() {
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return mLastVersionCode < mCurrentVersionCode;
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}
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/**
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* Check if this is a new installation.
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*
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* @return {@code true} if your app including {@code ChangeLog} is started the first time ever.
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* Also {@code true} if your app was uninstalled and installed again.
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*/
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public boolean isFirstRunEver() {
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return mLastVersionCode == NO_VERSION;
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}
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/**
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* Get the "What's New" dialog.
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*
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* @return An AlertDialog displaying the changes since the previous installed version of your
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* app (What's New). But when this is the first run of your app including
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* {@code ChangeLog} then the full log dialog is show.
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*/
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public AlertDialog getLogDialog() {
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return getDialog(isFirstRunEver());
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}
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/**
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* Get a dialog with the full change log.
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*
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* @return An AlertDialog with a full change log displayed.
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*/
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public AlertDialog getFullLogDialog() {
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return getDialog(true);
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}
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/**
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* Create a dialog containing (parts of the) change log.
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*
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* @param full
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* If this is {@code true} the full change log is displayed. Otherwise only changes for
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* versions newer than the last version are displayed.
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*
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* @return A dialog containing the (partial) change log.
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*/
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protected AlertDialog getDialog(boolean full) {
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WebView wv = new WebView(mContext);
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//wv.setBackgroundColor(0); // transparent
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wv.loadDataWithBaseURL(null, getLog(full), "text/html", "UTF-8", null);
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AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
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builder.setTitle(
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mContext.getResources().getString(
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full ? R.string.changelog_full_title : R.string.changelog_title))
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.setView(wv)
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.setCancelable(false)
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// OK button
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.setPositiveButton(
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mContext.getResources().getString(R.string.changelog_ok_button),
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new DialogInterface.OnClickListener() {
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@Override
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public void onClick(DialogInterface dialog, int which) {
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// The user clicked "OK" so save the current version code as
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// "last version code".
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updateVersionInPreferences();
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}
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});
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if (!full) {
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// Show "More…" button if we're only displaying a partial change log.
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builder.setNegativeButton(R.string.changelog_show_full,
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new DialogInterface.OnClickListener() {
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@Override
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public void onClick(DialogInterface dialog, int id) {
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getFullLogDialog().show();
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}
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});
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}
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return builder.create();
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}
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/**
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* Write current version code to the preferences.
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*/
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protected void updateVersionInPreferences() {
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SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(mContext);
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SharedPreferences.Editor editor = sp.edit();
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editor.putInt(VERSION_KEY, mCurrentVersionCode);
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// TODO: Update preferences from a background thread
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editor.commit();
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}
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/**
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* Get changes since last version as HTML string.
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*
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* @return HTML string containing the changes since the previous installed version of your app
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* (What's New).
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*/
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public String getLog() {
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return getLog(false);
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}
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/**
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* Get full change log as HTML string.
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*
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* @return HTML string containing the full change log.
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*/
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public String getFullLog() {
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return getLog(true);
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}
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/**
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* Get (partial) change log as HTML string.
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*
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* @param full
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* If this is {@code true} the full change log is returned. Otherwise only changes for
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* versions newer than the last version are returned.
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*
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* @return The (partial) change log.
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*/
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private String getLog(boolean full) {
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StringBuilder sb = new StringBuilder();
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sb.append("<html><head><style type=\"text/css\">");
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sb.append(mCss);
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sb.append("</style></head><body>");
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Resources resources = mContext.getResources();
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// Read master change log from xml/changelog_master.xml
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XmlResourceParser xml = mContext.getResources().getXml(R.xml.changelog_master);
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SparseArray<ReleaseItem> defaultChangelog;
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try {
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defaultChangelog = readChangeLog(xml, full);
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} finally {
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xml.close();
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}
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// Read localized change log from xml[-lang]/changelog.xml
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XmlResourceParser resXml = mContext.getResources().getXml(R.xml.changelog);
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SparseArray<ReleaseItem> changelog;
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try {
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changelog = readChangeLog(resXml, full);
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} finally {
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resXml.close();
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}
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String versionFormat = resources.getString(R.string.changelog_version_format);
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// Get all version codes from the master change log...
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List<Integer> versions = new ArrayList<Integer>(defaultChangelog.size());
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for (int i = 0, len = defaultChangelog.size(); i < len; i++) {
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int key = defaultChangelog.keyAt(i);
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versions.add(key);
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}
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// ... and sort them (newest version first).
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Collections.sort(versions, Collections.reverseOrder());
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for (Integer version : versions) {
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int key = version.intValue();
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// Use release information from localized change log and fall back to the master file
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// if necessary.
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ReleaseItem release = changelog.get(key, defaultChangelog.get(key));
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sb.append("<h1>");
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sb.append(String.format(versionFormat, release.versionName));
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sb.append("</h1><ul>");
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for (String change : release.changes) {
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sb.append("<li>");
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sb.append(change);
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sb.append("</li>");
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}
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sb.append("</ul>");
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}
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sb.append("</body></html>");
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return sb.toString();
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}
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/**
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* Read the change log from an XML file.
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*
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* @param xml
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* The {@code XmlPullParser} instance used to read the change log.
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* @param full
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* If {@code true} the full change log is read. Otherwise only the changes since the
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* last (saved) version are read.
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*
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* @return A {@code SparseArray} mapping the version codes to release information.
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*/
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protected SparseArray<ReleaseItem> readChangeLog(XmlPullParser xml, boolean full) {
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SparseArray<ReleaseItem> result = new SparseArray<ReleaseItem>();
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try {
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int eventType = xml.getEventType();
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while (eventType != XmlPullParser.END_DOCUMENT) {
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if (eventType == XmlPullParser.START_TAG && xml.getName().equals(ReleaseTag.NAME)) {
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if (parseReleaseTag(xml, full, result)) {
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// Stop reading more elements if this entry is not newer than the last
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// version.
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break;
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}
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}
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eventType = xml.next();
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}
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} catch (XmlPullParserException e) {
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Log.e(LOG_TAG, e.getMessage(), e);
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} catch (IOException e) {
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Log.e(LOG_TAG, e.getMessage(), e);
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}
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return result;
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}
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/**
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* Parse the {@code release} tag of a change log XML file.
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*
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* @param xml
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* The {@code XmlPullParser} instance used to read the change log.
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* @param full
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* If {@code true} the contents of the {@code release} tag are always added to
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* {@code changelog}. Otherwise only if the item's {@code versioncode} attribute is
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* higher than the last version code.
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* @param changelog
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* The {@code SparseArray} to add a new {@link ReleaseItem} instance to.
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*
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* @return {@code true} if the {@code release} element is describing changes of a version older
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* or equal to the last version. In that case {@code changelog} won't be modified and
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* {@link #readChangeLog(XmlPullParser, boolean)} will stop reading more elements from
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* the change log file.
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*
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* @throws XmlPullParserException
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* @throws IOException
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*/
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private boolean parseReleaseTag(XmlPullParser xml, boolean full,
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SparseArray<ReleaseItem> changelog) throws XmlPullParserException, IOException {
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String version = xml.getAttributeValue(null, ReleaseTag.ATTRIBUTE_VERSION);
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int versionCode;
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try {
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String versionCodeStr = xml.getAttributeValue(null, ReleaseTag.ATTRIBUTE_VERSION_CODE);
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versionCode = Integer.parseInt(versionCodeStr);
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} catch (NumberFormatException e) {
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versionCode = NO_VERSION;
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}
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if (!full && versionCode <= mLastVersionCode) {
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return true;
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}
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int eventType = xml.getEventType();
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List<String> changes = new ArrayList<String>();
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while (eventType != XmlPullParser.END_TAG || xml.getName().equals(ChangeTag.NAME)) {
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if (eventType == XmlPullParser.START_TAG && xml.getName().equals(ChangeTag.NAME)) {
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eventType = xml.next();
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changes.add(xml.getText());
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}
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eventType = xml.next();
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}
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ReleaseItem release = new ReleaseItem(versionCode, version, changes);
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changelog.put(versionCode, release);
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return false;
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}
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/**
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* Container used to store information about a release/version.
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*/
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protected static class ReleaseItem {
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/**
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* Version code of the release.
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*/
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public final int versionCode;
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/**
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* Version name of the release.
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*/
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public final String versionName;
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/**
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* List of changes introduced with that release.
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*/
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public final List<String> changes;
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ReleaseItem(int versionCode, String versionName, List<String> changes) {
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this.versionCode = versionCode;
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this.versionName = versionName;
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this.changes = changes;
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}
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}
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}
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