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/*
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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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 net.micode.notes.ui;/*声明类所在的包*/
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import android.content.Context;
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import android.database.Cursor;
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import android.text.TextUtils; /*导入必要的 Android 库*/
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import net.micode.notes.data.Contact;
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import net.micode.notes.data.Notes;
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import net.micode.notes.data.Notes.NoteColumns;
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import net.micode.notes.tool.DataUtils; /*导入笔记应用相关的数据模型和工具类*/
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public class NoteItemData {
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static final String [] PROJECTION = new String [] {
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NoteColumns.ID,
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NoteColumns.ALERTED_DATE,
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NoteColumns.BG_COLOR_ID,
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NoteColumns.CREATED_DATE,
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NoteColumns.HAS_ATTACHMENT,
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NoteColumns.MODIFIED_DATE,
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NoteColumns.NOTES_COUNT,
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NoteColumns.PARENT_ID,
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NoteColumns.SNIPPET,
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NoteColumns.TYPE,
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NoteColumns.WIDGET_ID,
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NoteColumns.WIDGET_TYPE,
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}; /*定义一个静态数组 PROJECTION，包含了从数据库查询笔记时需要的所有列名*/
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private static final int ID_COLUMN = 0;
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private static final int ALERTED_DATE_COLUMN = 1;
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private static final int BG_COLOR_ID_COLUMN = 2;
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private static final int CREATED_DATE_COLUMN = 3;
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private static final int HAS_ATTACHMENT_COLUMN = 4;
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private static final int MODIFIED_DATE_COLUMN = 5;
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private static final int NOTES_COUNT_COLUMN = 6;
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private static final int PARENT_ID_COLUMN = 7;
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private static final int SNIPPET_COLUMN = 8;
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private static final int TYPE_COLUMN = 9;
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private static final int WIDGET_ID_COLUMN = 10;
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private static final int WIDGET_TYPE_COLUMN = 11; /*定义了查询结果中各列对应的索引值*/
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private long mId;
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private long mAlertDate;
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private int mBgColorId;
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private long mCreatedDate;
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private boolean mHasAttachment;
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private long mModifiedDate;
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private int mNotesCount;
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private long mParentId;
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private String mSnippet;
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private int mType;
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private int mWidgetId;
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private int mWidgetType;
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private String mName;
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private String mPhoneNumber; /*声明了类的成员变量，用于存储笔记的数据*/
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private boolean mIsLastItem;
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private boolean mIsFirstItem;
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private boolean mIsOnlyOneItem;
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private boolean mIsOneNoteFollowingFolder;
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private boolean mIsMultiNotesFollowingFolder; /*声明了几个布尔类型的成员变量，用于标记笔记在列表中的位置关系*/
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public NoteItemData(Context context, Cursor cursor) {
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mId = cursor.getLong(ID_COLUMN);
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mAlertDate = cursor.getLong(ALERTED_DATE_COLUMN);
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mBgColorId = cursor.getInt(BG_COLOR_ID_COLUMN);
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mCreatedDate = cursor.getLong(CREATED_DATE_COLUMN);
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mHasAttachment = (cursor.getInt(HAS_ATTACHMENT_COLUMN) > 0) ? true : false;
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mModifiedDate = cursor.getLong(MODIFIED_DATE_COLUMN);
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mNotesCount = cursor.getInt(NOTES_COUNT_COLUMN);
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mParentId = cursor.getLong(PARENT_ID_COLUMN);
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mSnippet = cursor.getString(SNIPPET_COLUMN);
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mSnippet = mSnippet.replace(NoteEditActivity.TAG_CHECKED, "").replace(
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NoteEditActivity.TAG_UNCHECKED, "");
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mType = cursor.getInt(TYPE_COLUMN);
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mWidgetId = cursor.getInt(WIDGET_ID_COLUMN);
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mWidgetType = cursor.getInt(WIDGET_TYPE_COLUMN);
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mPhoneNumber = "";
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if (mParentId == Notes.ID_CALL_RECORD_FOLDER) {
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mPhoneNumber = DataUtils.getCallNumberByNoteId(context.getContentResolver(), mId);
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if (!TextUtils.isEmpty(mPhoneNumber)) {
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mName = Contact.getContact(context, mPhoneNumber);
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if (mName == null) {
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mName = mPhoneNumber;
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}
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}
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}
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if (mName == null) {
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mName = "";
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}
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checkPostion(cursor);
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} /*构造函数接收一个 Context 和一个 Cursor，从 Cursor 中读取笔记的数据，并初始化成员变量*/
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private void checkPostion(Cursor cursor) {
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mIsLastItem = cursor.isLast() ? true : false;
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mIsFirstItem = cursor.isFirst() ? true : false;
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mIsOnlyOneItem = (cursor.getCount() == 1);
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mIsMultiNotesFollowingFolder = false;
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mIsOneNoteFollowingFolder = false;
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if (mType == Notes.TYPE_NOTE && !mIsFirstItem) {
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int position = cursor.getPosition();
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if (cursor.moveToPrevious()) {
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if (cursor.getInt(TYPE_COLUMN) == Notes.TYPE_FOLDER
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|| cursor.getInt(TYPE_COLUMN) == Notes.TYPE_SYSTEM) {
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if (cursor.getCount() > (position + 1)) {
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mIsMultiNotesFollowingFolder = true;
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} else {
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mIsOneNoteFollowingFolder = true;
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}
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}
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if (!cursor.moveToNext()) {
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throw new IllegalStateException("cursor move to previous but can't move back");
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}
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}
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}
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} /*检查笔记在列表中的位置，并更新相应的位置标志*/
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public boolean isOneFollowingFolder() {
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return mIsOneNoteFollowingFolder;
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} /*返回笔记是否是紧随其后的单个笔记*/
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public boolean isMultiFollowingFolder() {
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return mIsMultiNotesFollowingFolder;
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} /*返回笔记是否是紧随其后的多个笔记之一*/
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public boolean isLast() {
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return mIsLastItem;
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} /*返回笔记是否是列表中的最后一个*/
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public String getCallName() {
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return mName;
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} /*返回与笔记关联的联系人姓名*/
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public boolean isFirst() {
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return mIsFirstItem;
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} /*返回笔记是否是列表中的第一个*/
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public boolean isSingle() {
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return mIsOnlyOneItem;
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} /*返回列表中是否只有一个笔记*/
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public long getId() {
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return mId;
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} /*返回笔记的 ID*/
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public long getAlertDate() {
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return mAlertDate;
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} /*返回笔记的提醒日期*/
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public long getCreatedDate() {
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return mCreatedDate;
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} /*返回笔记的创建日期*/
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public boolean hasAttachment() {
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return mHasAttachment;
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} /*返回笔记是否有附件*/
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public long getModifiedDate() {
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return mModifiedDate;
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} /*返回笔记的最后修改日期*/
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public int getBgColorId() {
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return mBgColorId;
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} /*返回笔记背景颜色的 ID*/
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public long getParentId() {
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return mParentId;
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} /*返回笔记所属文件夹的 ID*/
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public int getNotesCount() {
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return mNotesCount;
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} /*返回笔记的数量*/
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public long getFolderId () {
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return mParentId;
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} /*返回笔记所属文件夹的 ID*/
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public int getType() {
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return mType;
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} /*返回笔记的类型*/
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public int getWidgetType() {
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return mWidgetType;
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} /*返回小部件的类型*/
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public int getWidgetId() {
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return mWidgetId;
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} /*返回小部件的 ID*/
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public String getSnippet() {
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return mSnippet;
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} /*返回笔记的摘要*/
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public boolean hasAlert() {
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return (mAlertDate > 0);
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} /*返回笔记是否有提醒设置*/
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public boolean isCallRecord() {
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return (mParentId == Notes.ID_CALL_RECORD_FOLDER && !TextUtils.isEmpty(mPhoneNumber));
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} /*返回笔记是否属于通话记录类型*/
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public static int getNoteType(Cursor cursor) {
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return cursor.getInt(TYPE_COLUMN);
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} /*静态方法，从游标中获取笔记的类型*/
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}
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