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@ -1,18 +1,17 @@
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以下是带有中文注释的代码:
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```java
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/*
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/*
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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*
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*
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* 根据Apache License, Version 2.0(以下简称“许可证”)授权;
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* Licensed under the Apache License, Version 2.0 (the "License");
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* 除非遵守许可证,否则不得使用此文件。
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* you may not use this file except in compliance with the License.
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* 你可以在以下网址获得许可证的副本:
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* You may obtain a copy of the License at
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*
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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*
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* 除非适用法律要求或书面同意,否则按“原样”提供软件
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* Unless required by applicable law or agreed to in writing, software
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* 在许可证下分发,不附带任何明示或暗示的保证或条件。
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* distributed under the License is distributed on an "AS IS" BASIS,
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* 请参阅许可证,了解有关权限和限制的具体语言。
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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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package net.micode.notes.tool;
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package net.micode.notes.tool;
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@ -36,13 +35,13 @@ import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.IOException;
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import java.io.PrintStream;
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import java.io.PrintStream;
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// 备份工具类,用于将笔记数据备份到文本文件中。
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// 备份工具类,用于将笔记数据导出为文本文件
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public class BackupUtils {
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public class BackupUtils {
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private static final String TAG = "BackupUtils";
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private static final String TAG = "BackupUtils";
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// 单例模式
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// 单例实例
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private static BackupUtils sInstance;
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private static BackupUtils sInstance;
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// 获取BackupUtils的单例,如果不存在则创建。
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// 获取BackupUtils的单例实例
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public static synchronized BackupUtils getInstance(Context context) {
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public static synchronized BackupUtils getInstance(Context context) {
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if (sInstance == null) {
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if (sInstance == null) {
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sInstance = new BackupUtils(context);
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sInstance = new BackupUtils(context);
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@ -51,49 +50,48 @@ public class BackupUtils {
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}
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}
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/**
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/**
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* 以下状态码用于表示备份或恢复的状态。
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* 以下状态码表示备份或恢复的状态
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*/
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*/
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// SD卡未挂载
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// SD卡未挂载
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public static final int STATE_SD_CARD_UNMOUONTED = 0;
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public static final int STATE_SD_CARD_UNMOUONTED = 0;
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// 备份文件不存在
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// 备份文件不存在
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public static final int STATE_BACKUP_FILE_NOT_EXIST = 1;
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public static final int STATE_BACKUP_FILE_NOT_EXIST = 1;
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// 数据格式不正确,可能被其他程序更改
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// 数据损坏或格式不正确
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public static final int STATE_DATA_DESTROIED = 2;
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public static final int STATE_DATA_DESTROIED = 2;
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// 运行时异常导致备份或恢复失败
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// 系统错误导致备份或恢复失败
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public static final int STATE_SYSTEM_ERROR = 3;
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public static final int STATE_SYSTEM_ERROR = 3;
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// 备份或恢复成功
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// 备份或恢复成功
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public static final int STATE_SUCCESS = 4;
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public static final int STATE_SUCCESS = 4;
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private TextExport mTextExport;
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private TextExport mTextExport;
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// 私有构造函数,用于创建BackupUtils实例。
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// 构造函数,初始化TextExport实例
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private BackupUtils(Context context) {
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private BackupUtils(Context context) {
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mTextExport = new TextExport(context);
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mTextExport = new TextExport(context);
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}
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}
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// 检查外部存储是否可用。
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// 检查外部存储是否可用
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private static boolean externalStorageAvailable() {
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private static boolean externalStorageAvailable() {
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return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
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return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
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}
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}
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// 导出笔记数据到文本文件。
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// 导出笔记数据为文本文件
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public int exportToText() {
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public int exportToText() {
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return mTextExport.exportToText();
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return mTextExport.exportToText();
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}
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}
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// 获取导出的文本文件名。
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// 获取导出的文本文件名
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public String getExportedTextFileName() {
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public String getExportedTextFileName() {
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return mTextExport.mFileName;
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return mTextExport.mFileName;
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}
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}
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// 获取导出的文本文件目录。
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// 获取导出的文本文件目录
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public String getExportedTextFileDir() {
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public String getExportedTextFileDir() {
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return mTextExport.mFileDirectory;
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return mTextExport.mFileDirectory;
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}
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}
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// 内部类,用于将笔记数据导出到文本。
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// 文本导出类,用于将笔记数据导出为文本格式
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private static class TextExport {
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private static class TextExport {
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// 笔记数据投影数组。
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private static final String[] NOTE_PROJECTION = {
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private static final String[] NOTE_PROJECTION = {
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NoteColumns.ID,
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NoteColumns.ID,
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NoteColumns.MODIFIED_DATE,
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NoteColumns.MODIFIED_DATE,
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@ -101,12 +99,12 @@ public class BackupUtils {
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NoteColumns.TYPE
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NoteColumns.TYPE
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};
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};
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// 数据列索引。
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private static final int NOTE_COLUMN_ID = 0;
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private static final int NOTE_COLUMN_ID = 0;
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private static final int NOTE_COLUMN_MODIFIED_DATE = 1;
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private static final int NOTE_COLUMN_MODIFIED_DATE = 1;
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private static final int NOTE_COLUMN_SNIPPET = 2;
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private static final int NOTE_COLUMN_SNIPPET = 2;
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// 数据数据投影数组。
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private static final String[] DATA_PROJECTION = {
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private static final String[] DATA_PROJECTION = {
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DataColumns.CONTENT,
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DataColumns.CONTENT,
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DataColumns.MIME_TYPE,
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DataColumns.MIME_TYPE,
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@ -116,25 +114,24 @@ public class BackupUtils {
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DataColumns.DATA4,
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DataColumns.DATA4,
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};
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};
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// 数据列索引。
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private static final int DATA_COLUMN_CONTENT = 0;
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private static final int DATA_COLUMN_CONTENT = 0;
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private static final int DATA_COLUMN_MIME_TYPE = 1;
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private static final int DATA_COLUMN_MIME_TYPE = 1;
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private static final int DATA_COLUMN_CALL_DATE = 2;
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private static final int DATA_COLUMN_CALL_DATE = 2;
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private static final int DATA_COLUMN_PHONE_NUMBER = 4;
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private static final int DATA_COLUMN_PHONE_NUMBER = 4;
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// 导出文本的格式数组。
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private final String [] TEXT_FORMAT;
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private final String [] TEXT_FORMAT;
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private static final int FORMAT_FOLDER_NAME = 0;
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private static final int FORMAT_FOLDER_NAME = 0;
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private static final int FORMAT_NOTE_DATE = 1;
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private static final int FORMAT_NOTE_DATE = 1;
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private static final int FORMAT_NOTE_CONTENT = 2;
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private static final int FORMAT_NOTE_CONTENT = 2;
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// 上下文对象,用于访问资源和内容解析器。
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private Context mContext;
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private Context mContext;
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// 导出文件的名称和目录。
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private String mFileName;
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private String mFileName;
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private String mFileDirectory;
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private String mFileDirectory;
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// 构造函数,初始化上下文和格式数组。
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// 构造函数,初始化导出格式和上下文
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public TextExport(Context context) {
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public TextExport(Context context) {
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TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note);
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TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note);
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mContext = context;
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mContext = context;
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@ -142,16 +139,14 @@ public class BackupUtils {
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mFileDirectory = "";
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mFileDirectory = "";
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}
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}
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// 根据ID获取对应的格式字符串。
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// 根据ID获取导出格式字符串
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private String getFormat(int id) {
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private String getFormat(int id) {
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return TEXT_FORMAT[id];
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return TEXT_FORMAT[id];
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}
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}
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/**
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// 导出指定文件夹下的笔记到文本文件
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* 将指定文件夹ID的笔记导出到文本。
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*/
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private void exportFolderToText(String folderId, PrintStream ps) {
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private void exportFolderToText(String folderId, PrintStream ps) {
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// 查询属于该文件夹的笔记。
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// 查询属于该文件夹的笔记
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Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI,
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Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI,
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NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] {
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NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] {
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folderId
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folderId
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@ -160,11 +155,11 @@ public class BackupUtils {
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if (notesCursor != null) {
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if (notesCursor != null) {
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if (notesCursor.moveToFirst()) {
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if (notesCursor.moveToFirst()) {
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do {
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do {
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// 打印笔记最后修改日期。
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// 打印笔记的最后修改日期
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ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
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ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
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mContext.getString(R.string.format_datetime_mdhm),
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mContext.getString(R.string.format_datetime_mdhm),
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notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
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notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
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// 查询属于该笔记的数据。
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// 查询属于该笔记的数据
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String noteId = notesCursor.getString(NOTE_COLUMN_ID);
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String noteId = notesCursor.getString(NOTE_COLUMN_ID);
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exportNoteToText(noteId, ps);
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exportNoteToText(noteId, ps);
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} while (notesCursor.moveToNext());
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} while (notesCursor.moveToNext());
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@ -173,9 +168,7 @@ public class BackupUtils {
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}
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}
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}
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}
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/**
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// 导出指定笔记到文本输出流
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* 将指定ID的笔记导出到打印流。
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*/
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private void exportNoteToText(String noteId, PrintStream ps) {
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private void exportNoteToText(String noteId, PrintStream ps) {
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Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI,
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Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI,
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DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[] {
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DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[] {
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@ -216,7 +209,7 @@ public class BackupUtils {
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}
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}
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dataCursor.close();
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dataCursor.close();
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}
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}
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// 打印笔记之间的分隔线。
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// 打印笔记之间的分隔符
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try {
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try {
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ps.write(new byte[] {
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ps.write(new byte[] {
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Character.LINE_SEPARATOR, Character.LETTER_NUMBER
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Character.LINE_SEPARATOR, Character.LETTER_NUMBER
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@ -226,28 +219,25 @@ public class BackupUtils {
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}
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}
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}
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}
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/**
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// 将笔记数据导出为用户可读的文本文件
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* 将笔记导出为用户可读的文本。
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*/
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public int exportToText() {
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public int exportToText() {
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if (!externalStorageAvailable()) {
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if (!externalStorageAvailable()) {
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Log.d(TAG, "媒体未挂载");
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Log.d(TAG, "Media was not mounted");
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return STATE_SD_CARD_UNMOUONTED;
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return STATE_SD_CARD_UNMOUONTED;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
PrintStream ps = getExportToTextPrintStream();
|
|
|
|
PrintStream ps = getExportToTextPrintStream();
|
|
|
|
if (ps == null) {
|
|
|
|
if (ps == null) {
|
|
|
|
Log.e(TAG, "获取打印流出错");
|
|
|
|
Log.e(TAG, "get print stream error");
|
|
|
|
return STATE_SYSTEM_ERROR;
|
|
|
|
return STATE_SYSTEM_ERROR;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// 首先导出文件夹及其笔记。
|
|
|
|
// 首先导出文件夹及其笔记
|
|
|
|
Cursor folderCursor = mContext.getContentResolver().query(
|
|
|
|
Cursor folderCursor = mContext.getContentResolver().query(
|
|
|
|
Notes.CONTENT_NOTE_URI,
|
|
|
|
Notes.CONTENT_NOTE_URI,
|
|
|
|
NOTE_PROJECTION,
|
|
|
|
NOTE_PROJECTION,
|
|
|
|
"(" + NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER + " AND "
|
|
|
|
"(" + NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER + " AND "
|
|
|
|
+ NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + ") OR "
|
|
|
|
+ NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + ") OR "
|
|
|
|
+ NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER,
|
|
|
|
+ NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER, null, null);
|
|
|
|
null, null);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
if (folderCursor != null) {
|
|
|
|
if (folderCursor != null) {
|
|
|
|
if (folderCursor.moveToFirst()) {
|
|
|
|
if (folderCursor.moveToFirst()) {
|
|
|
@ -269,21 +259,20 @@ public class BackupUtils {
|
|
|
|
folderCursor.close();
|
|
|
|
folderCursor.close();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// 导出根文件夹中的笔记。
|
|
|
|
// 导出根文件夹下的笔记
|
|
|
|
// 导出根文件夹中的笔记
|
|
|
|
|
|
|
|
Cursor noteCursor = mContext.getContentResolver().query(
|
|
|
|
Cursor noteCursor = mContext.getContentResolver().query(
|
|
|
|
Notes.CONTENT_NOTE_URI,
|
|
|
|
Notes.CONTENT_NOTE_URI,
|
|
|
|
NOTE_PROJECTION,
|
|
|
|
NOTE_PROJECTION,
|
|
|
|
NoteColumns.TYPE + "=" + Notes.TYPE_NOTE + " AND " + NoteColumns.PARENT_ID + "=0", null, null);
|
|
|
|
NoteColumns.TYPE + "=" + +Notes.TYPE_NOTE + " AND " + NoteColumns.PARENT_ID
|
|
|
|
|
|
|
|
+ "=0", null, null);
|
|
|
|
|
|
|
|
|
|
|
|
if (noteCursor != null) {
|
|
|
|
if (noteCursor != null) {
|
|
|
|
if (noteCursor.moveToFirst()) {
|
|
|
|
if (noteCursor.moveToFirst()) {
|
|
|
|
do {
|
|
|
|
do {
|
|
|
|
// 打印笔记最后修改日期
|
|
|
|
|
|
|
|
ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
|
|
|
|
ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
|
|
|
|
mContext.getString(R.string.format_datetime_mdhm),
|
|
|
|
mContext.getString(R.string.format_datetime_mdhm),
|
|
|
|
noteCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
|
|
|
|
noteCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
|
|
|
|
// 查询属于这条笔记的数据
|
|
|
|
// 查询属于该笔记的数据
|
|
|
|
String noteId = noteCursor.getString(NOTE_COLUMN_ID);
|
|
|
|
String noteId = noteCursor.getString(NOTE_COLUMN_ID);
|
|
|
|
exportNoteToText(noteId, ps);
|
|
|
|
exportNoteToText(noteId, ps);
|
|
|
|
} while (noteCursor.moveToNext());
|
|
|
|
} while (noteCursor.moveToNext());
|
|
|
@ -292,19 +281,15 @@ public class BackupUtils {
|
|
|
|
}
|
|
|
|
}
|
|
|
|
ps.close();
|
|
|
|
ps.close();
|
|
|
|
|
|
|
|
|
|
|
|
// 返回成功状态码
|
|
|
|
|
|
|
|
return STATE_SUCCESS;
|
|
|
|
return STATE_SUCCESS;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
// 获取指向导出文本文件的PrintStream
|
|
|
|
* 获取指向导出文本文件的打印流
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
private PrintStream getExportToTextPrintStream() {
|
|
|
|
private PrintStream getExportToTextPrintStream() {
|
|
|
|
// 生成存储导出数据的文本文件
|
|
|
|
|
|
|
|
File file = generateFileMountedOnSDcard(mContext, R.string.file_path,
|
|
|
|
File file = generateFileMountedOnSDcard(mContext, R.string.file_path,
|
|
|
|
R.string.file_name_txt_format);
|
|
|
|
R.string.file_name_txt_format);
|
|
|
|
if (file == null) {
|
|
|
|
if (file == null) {
|
|
|
|
Log.e(TAG, "创建导出文件失败");
|
|
|
|
Log.e(TAG, "create file to exported failed");
|
|
|
|
return null;
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
mFileName = file.getName();
|
|
|
|
mFileName = file.getName();
|
|
|
@ -324,9 +309,7 @@ public class BackupUtils {
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
// 生成用于存储导入数据的文本文件
|
|
|
|
* 在SD卡上生成用于存储导入数据的文本文件
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
|
|
|
|
private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
|
|
sb.append(Environment.getExternalStorageDirectory());
|
|
|
|
sb.append(Environment.getExternalStorageDirectory());
|
|
|
@ -354,3 +337,4 @@ private static File generateFileMountedOnSDcard(Context context, int filePathRes
|
|
|
|
|
|
|
|
|
|
|
|
return null;
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|