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@ -0,0 +1,417 @@
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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.tool;
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import android.content.Context;
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import android.database.Cursor;
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import android.os.Environment;
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import android.text.TextUtils;
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import android.text.format.DateFormat;
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import android.util.Log;
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import net.micode.notes.R;
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import net.micode.notes.data.Notes;
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import net.micode.notes.data.Notes.DataColumns;
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import net.micode.notes.data.Notes.DataConstants;
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import net.micode.notes.data.Notes.NoteColumns;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.PrintStream;
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/**
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* 笔记数据备份工具类
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* 功能:将应用内的笔记数据导出为文本文件,支持文件夹和笔记内容的结构化导出
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* 设计模式:单例模式,确保全局唯一实例
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*/
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public class BackupUtils {
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private static final String TAG = "BackupUtils";
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// 单例实例引用
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private static BackupUtils sInstance;
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/**
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* 获取单例实例
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*
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* @param context 应用上下文,用于初始化内部组件
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* @return BackupUtils实例
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*/
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public static synchronized BackupUtils getInstance(Context context) {
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if (sInstance == null) {
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sInstance = new BackupUtils(context);
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}
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return sInstance;
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}
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/**
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* 备份/恢复操作的状态码定义
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* 用于标识操作过程中的不同状态或错误类型
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*/
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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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// 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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// 数据格式损坏(可能被其他程序修改)
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public static final int STATE_DATA_DESTROIED = 2;
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// 系统运行时异常
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public static final int STATE_SYSTEM_ERROR = 3;
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// 操作成功
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public static final int STATE_SUCCESS = 4;
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// 文本导出组件引用
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private TextExport mTextExport;
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/**
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* 私有构造函数,确保单例模式
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*
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* @param context 应用上下文
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*/
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private BackupUtils(Context 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(SD卡)是否可用
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*
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* @return true-已挂载且可读写,false-不可用
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*/
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private static boolean externalStorageAvailable() {
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return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
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}
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/**
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* 执行笔记数据导出为文本文件
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*
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* @return 操作状态码(参考STATE_*常量)
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*/
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public int 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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*
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* @return 文件名(含扩展名)
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*/
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public String getExportedTextFileName() {
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return mTextExport.mFileName;
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}
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/**
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* 获取导出文件的存储目录
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*
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* @return 目录路径字符串
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*/
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public String getExportedTextFileDir() {
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return mTextExport.mFileDirectory;
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}
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/**
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* 文本导出内部类
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* 负责具体的笔记数据导出逻辑,包括数据库查询和文件写入
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*/
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private static class TextExport {
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// 笔记查询的列投影(指定查询哪些字段)
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private static final String[] NOTE_PROJECTION = {
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NoteColumns.ID, // 笔记ID
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NoteColumns.MODIFIED_DATE, // 最后修改时间
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NoteColumns.SNIPPET, // 笔记摘要(文件夹名称)
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NoteColumns.TYPE // 笔记类型(普通笔记/文件夹)
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};
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// 笔记查询结果集中各列的索引
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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_SNIPPET = 2;
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// 笔记数据(内容)查询的列投影
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private static final String[] DATA_PROJECTION = {
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DataColumns.CONTENT, // 内容主体
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DataColumns.MIME_TYPE, // 内容类型(文本/通话记录等)
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DataColumns.DATA1, // 扩展数据1(通话时间)
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DataColumns.DATA2, // 扩展数据2
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DataColumns.DATA3, // 扩展数据3
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DataColumns.DATA4, // 扩展数据4(电话号码)
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};
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// 数据查询结果集中各列的索引
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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_CALL_DATE = 2;
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private static final int DATA_COLUMN_PHONE_NUMBER = 4;
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// 导出文本的格式模板(从资源文件获取)
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private final String[] TEXT_FORMAT;
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// 格式模板索引定义
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private static final int FORMAT_FOLDER_NAME = 0; // 文件夹名称格式
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private static final int FORMAT_NOTE_DATE = 1; // 笔记日期格式
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private static final int FORMAT_NOTE_CONTENT = 2; // 笔记内容格式
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// 上下文、文件名、文件目录引用
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private Context mContext;
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private String mFileName;
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private String mFileDirectory;
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/**
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* 构造函数
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*
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* @param context 应用上下文
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*/
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public TextExport(Context context) {
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// 从资源文件获取导出格式模板
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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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}
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/**
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* 获取指定索引的格式模板
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*
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* @param id 格式模板索引(参考FORMAT_*常量)
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* @return 格式字符串
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*/
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private String getFormat(int id) {
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return TEXT_FORMAT[id];
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}
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/**
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* 将指定文件夹及其包含的笔记导出到文本流
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*
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* @param folderId 文件夹ID
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* @param ps 打印流(用于写入文件)
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*/
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private void exportFolderToText(String folderId, PrintStream ps) {
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// 查询属于该文件夹的所有笔记
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Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI,
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NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] { folderId }, null);
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if (notesCursor != null) {
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if (notesCursor.moveToFirst()) {
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do {
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// 打印笔记最后修改日期(使用指定格式)
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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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notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
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// 获取当前笔记ID并导出其内容
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String noteId = notesCursor.getString(NOTE_COLUMN_ID);
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exportNoteToText(noteId, ps);
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} while (notesCursor.moveToNext());
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}
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notesCursor.close();
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}
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}
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/**
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* 将指定笔记的内容导出到文本流
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*
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* @param noteId 笔记ID
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* @param ps 打印流(用于写入文件)
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*/
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private void exportNoteToText(String noteId, PrintStream ps) {
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// 查询该笔记的具体内容数据
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Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI,
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DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[] { noteId }, null);
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if (dataCursor != null) {
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if (dataCursor.moveToFirst()) {
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do {
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String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE);
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if (DataConstants.CALL_NOTE.equals(mimeType)) {
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// 处理通话记录类型的笔记
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String phoneNumber = dataCursor.getString(DATA_COLUMN_PHONE_NUMBER);
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long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE);
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String location = dataCursor.getString(DATA_COLUMN_CONTENT);
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// 打印电话号码
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if (!TextUtils.isEmpty(phoneNumber)) {
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ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), phoneNumber));
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}
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// 打印通话时间
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ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), DateFormat
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.format(mContext.getString(R.string.format_datetime_mdhm), callDate)));
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// 打印通话相关位置信息
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if (!TextUtils.isEmpty(location)) {
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ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), location));
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}
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} else if (DataConstants.NOTE.equals(mimeType)) {
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// 处理普通文本笔记
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String content = dataCursor.getString(DATA_COLUMN_CONTENT);
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if (!TextUtils.isEmpty(content)) {
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ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), content));
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}
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}
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} while (dataCursor.moveToNext());
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}
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dataCursor.close();
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}
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// 在笔记之间添加分隔符
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try {
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ps.write(new byte[] { Character.LINE_SEPARATOR, Character.LETTER_NUMBER });
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} catch (IOException e) {
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Log.e(TAG, e.toString());
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}
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}
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/**
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* 执行完整的笔记数据导出流程
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*
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* @return 导出操作状态码(参考STATE_*常量)
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*/
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public int exportToText() {
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// 检查SD卡是否可用
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if (!externalStorageAvailable()) {
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Log.d(TAG, "Media was not mounted");
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return STATE_SD_CARD_UNMOUONTED;
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}
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// 获取文件打印流
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PrintStream ps = getExportToTextPrintStream();
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if (ps == null) {
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Log.e(TAG, "get print stream error");
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return STATE_SYSTEM_ERROR;
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}
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// 第一步:导出所有文件夹及其笔记
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Cursor folderCursor = mContext.getContentResolver().query(
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Notes.CONTENT_NOTE_URI,
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NOTE_PROJECTION,
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"(" + NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER + " AND "
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+ NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + ") OR "
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+ NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER,
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null, null);
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if (folderCursor != null) {
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if (folderCursor.moveToFirst()) {
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do {
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// 打印文件夹名称(通话记录文件夹使用固定名称)
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String folderName = "";
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if (folderCursor.getLong(NOTE_COLUMN_ID) == Notes.ID_CALL_RECORD_FOLDER) {
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folderName = mContext.getString(R.string.call_record_folder_name);
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} else {
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folderName = folderCursor.getString(NOTE_COLUMN_SNIPPET);
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}
|
|
|
|
|
if (!TextUtils.isEmpty(folderName)) {
|
|
|
|
|
ps.println(String.format(getFormat(FORMAT_FOLDER_NAME), folderName));
|
|
|
|
|
}
|
|
|
|
|
// 导出该文件夹下的所有笔记
|
|
|
|
|
String folderId = folderCursor.getString(NOTE_COLUMN_ID);
|
|
|
|
|
exportFolderToText(folderId, ps);
|
|
|
|
|
} while (folderCursor.moveToNext());
|
|
|
|
|
}
|
|
|
|
|
folderCursor.close();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 第二步:导出根目录下的普通笔记
|
|
|
|
|
Cursor noteCursor = mContext.getContentResolver().query(
|
|
|
|
|
Notes.CONTENT_NOTE_URI,
|
|
|
|
|
NOTE_PROJECTION,
|
|
|
|
|
NoteColumns.TYPE + "=" + Notes.TYPE_NOTE + " AND " + NoteColumns.PARENT_ID + "=0",
|
|
|
|
|
null, null);
|
|
|
|
|
|
|
|
|
|
if (noteCursor != null) {
|
|
|
|
|
if (noteCursor.moveToFirst()) {
|
|
|
|
|
do {
|
|
|
|
|
// 打印笔记修改日期
|
|
|
|
|
ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
|
|
|
|
|
mContext.getString(R.string.format_datetime_mdhm),
|
|
|
|
|
noteCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
|
|
|
|
|
// 导出该笔记的内容
|
|
|
|
|
String noteId = noteCursor.getString(NOTE_COLUMN_ID);
|
|
|
|
|
exportNoteToText(noteId, ps);
|
|
|
|
|
} while (noteCursor.moveToNext());
|
|
|
|
|
}
|
|
|
|
|
noteCursor.close();
|
|
|
|
|
}
|
|
|
|
|
// 关闭打印流
|
|
|
|
|
ps.close();
|
|
|
|
|
|
|
|
|
|
return STATE_SUCCESS;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 获取用于导出文本的打印流
|
|
|
|
|
*
|
|
|
|
|
* @return 打印流对象,失败时返回null
|
|
|
|
|
*/
|
|
|
|
|
private PrintStream getExportToTextPrintStream() {
|
|
|
|
|
// 生成SD卡上的目标文件
|
|
|
|
|
File file = generateFileMountedOnSDcard(mContext, R.string.file_path,
|
|
|
|
|
R.string.file_name_txt_format);
|
|
|
|
|
if (file == null) {
|
|
|
|
|
Log.e(TAG, "create file to exported failed");
|
|
|
|
|
return null;
|
|
|
|
|
}
|
|
|
|
|
// 记录文件名和目录
|
|
|
|
|
mFileName = file.getName();
|
|
|
|
|
mFileDirectory = mContext.getString(R.string.file_path);
|
|
|
|
|
|
|
|
|
|
// 创建打印流
|
|
|
|
|
PrintStream ps = null;
|
|
|
|
|
try {
|
|
|
|
|
FileOutputStream fos = new FileOutputStream(file);
|
|
|
|
|
ps = new PrintStream(fos);
|
|
|
|
|
} catch (FileNotFoundException e) {
|
|
|
|
|
e.printStackTrace();
|
|
|
|
|
return null;
|
|
|
|
|
} catch (NullPointerException e) {
|
|
|
|
|
e.printStackTrace();
|
|
|
|
|
return null;
|
|
|
|
|
}
|
|
|
|
|
return ps;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* 在SD卡上生成用于存储导出数据的文件
|
|
|
|
|
*
|
|
|
|
|
* @param context 应用上下文
|
|
|
|
|
* @param filePathResId 目录路径资源ID
|
|
|
|
|
* @param fileNameFormatResId 文件名格式资源ID
|
|
|
|
|
* @return 生成的文件对象,失败时返回null
|
|
|
|
|
*/
|
|
|
|
|
private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
|
|
|
|
|
// 构建文件路径(SD卡根目录+应用自定义路径)
|
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
|
|
|
sb.append(Environment.getExternalStorageDirectory());
|
|
|
|
|
sb.append(context.getString(filePathResId));
|
|
|
|
|
File filedir = new File(sb.toString());
|
|
|
|
|
|
|
|
|
|
// 构建文件名(含日期后缀)
|
|
|
|
|
sb.append(context.getString(
|
|
|
|
|
fileNameFormatResId,
|
|
|
|
|
DateFormat.format(context.getString(R.string.format_date_ymd),
|
|
|
|
|
System.currentTimeMillis())));
|
|
|
|
|
File file = new File(sb.toString());
|
|
|
|
|
|
|
|
|
|
// 创建目录和文件(如果不存在)
|
|
|
|
|
try {
|
|
|
|
|
if (!filedir.exists()) {
|
|
|
|
|
filedir.mkdir();
|
|
|
|
|
}
|
|
|
|
|
if (!file.exists()) {
|
|
|
|
|
file.createNewFile();
|
|
|
|
|
}
|
|
|
|
|
return file;
|
|
|
|
|
} catch (SecurityException e) {
|
|
|
|
|
e.printStackTrace();
|
|
|
|
|
} catch (IOException e) {
|
|
|
|
|
e.printStackTrace();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return null;
|
|
|
|
|
}
|
|
|
|
|
}
|