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@ -0,0 +1,822 @@
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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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// 包名,表示这个类属于哪个应用或库的一部分
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package net.micode.notes.tool;
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import android.content.Context; // 引入Context类,它是Android应用的全局信息的接口
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import android.database.Cursor; // 引入Cursor类,用于遍历数据库查询结果
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import android.os.Environment; // 引入Environment类,提供有关Android设备环境的访问
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import android.text.TextUtils; // 引入TextUtils类,包含一些静态方法用于处理字符串
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import android.text.format.DateFormat; // 引入DateFormat类,用于格式化日期和时间
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import android.util.Log; // 引入Log类,用于记录日志信息
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import net.micode.notes.R; // 引入R类,它是一个包含应用资源引用的类
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import net.micode.notes.data.Notes; // 引入Notes类,它可能是一个包含数据库访问逻辑的类
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import net.micode.notes.data.Notes.DataColumns; // 引入DataColumns接口,定义了数据表列名
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import net.micode.notes.data.Notes.DataConstants; // 引入DataConstants类,可能包含一些数据相关的常量
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import net.micode.notes.data.Notes.NoteColumns; // 引入NoteColumns接口,定义了笔记表列名
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import java.io.File; // 引入File类,表示文件和目录路径名的抽象表示形式
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import java.io.FileNotFoundException; // 引入FileNotFoundException类,当文件未找到时抛出
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import java.io.FileOutputStream; // 引入FileOutputStream类,用于写入文件数据
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import java.io.IOException; // 引入IOException类,是输入输出异常的超类
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import java.io.PrintStream; // 引入PrintStream类,用于表示打印流的抽象类
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// BackupUtils类,用于实现备份工具的功能
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public class BackupUtils {
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private static final String TAG = "BackupUtils"; // 定义日志标签,用于日志输出
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// Singleton stuff(单例模式相关代码)
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private static BackupUtils sInstance; // 定义单例实例变量
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// 获取BackupUtils类的实例,使用单例模式确保全局只有一个实例
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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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// 定义一些常量来表示备份或恢复的状态
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public static final int STATE_SD_CARD_UNMOUONTED = 0; // SD卡未挂载
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public static final int STATE_BACKUP_FILE_NOT_EXIST = 1; // 备份文件不存在
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public static final int STATE_DATA_DESTROIED = 2; // 数据被破坏
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public static final int STATE_SYSTEM_ERROR = 3; // 系统错误
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public static final int STATE_SUCCESS = 4; // 成功
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private TextExport mTextExport; // TextExport类的实例变量,用于导出文本
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// 私有构造方法,防止外部直接创建实例,配合单例模式使用
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private BackupUtils(Context context) {
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mTextExport = new TextExport(context);
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}
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// 检查外部存储是否可用的方法
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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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// 导出数据到文本文件的方法
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public int exportToText() {
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return mTextExport.exportToText();
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}
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// 获取导出的文本文件名的方法
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public String getExportedTextFileName() {
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return mTextExport.mFileName;
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}
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// 获取导出的文本文件目录的方法
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public String getExportedTextFileDir() {
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return mTextExport.mFileDirectory;
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}
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// TextExport内部类,用于实现将数据导出到文本文件的功能
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private static class TextExport {
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// 定义从Note表中查询数据的列名数组
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private static final String[] NOTE_PROJECTION = {
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NoteColumns.ID,
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NoteColumns.MODIFIED_DATE,
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NoteColumns.SNIPPET,
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NoteColumns.TYPE
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};
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// 定义Note表中各列在NOTE_PROJECTION数组中的索引
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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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// 定义从Data表中查询数据的列名数组
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private static final String[] DATA_PROJECTION = {
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DataColumns.CONTENT,
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DataColumns.MIME_TYPE,
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DataColumns.DATA1,
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DataColumns.DATA2,
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DataColumns.DATA3,
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DataColumns.DATA4,
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};
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// 定义Data表中各列在DATA_PROJECTION数组中的索引
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// 注意:这里有一个错误,应该是DATA_COLUMN_DATA3而不是DATA_COLUMN_CALL_DATE
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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; // 错误,应为DATA_COLUMN_DATA1或其他正确的索引
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private static final int DATA_COLUMN_PHONE_NUMBER = 4; // 错误,索引与DATA_PROJECTION不匹配
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// 从资源文件中获取文本格式的数组
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private final String [] TEXT_FORMAT;
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// 定义TEXT_FORMAT数组中各个格式的索引
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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_CONTENT = 2;
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// Context实例变量,用于访问应用的资源和类
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private Context mContext;
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// 导出的文本文件名
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private String mFileName;
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// 导出的文本文件目录
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private String mFileDirectory;
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// TextExport类的构造方法
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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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mContext = context;
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mFileName = "";
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mFileDirectory = "";
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}
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// 根据索引获取TEXT_FORMAT数组中对应格式的方法
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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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* Export the folder identified by folder id to text
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*/
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private void exportFolderToText(String folderId, PrintStream ps) {
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// 使用内容解析器查询属于指定文件夹的笔记
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Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI,
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NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] {
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folderId
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}, null);
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// 检查返回的Cursor是否为null
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if (notesCursor != null) {
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// 移动Cursor到第一行,如果Cursor不为空且至少有一行数据
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if (notesCursor.moveToFirst()) {
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do {
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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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mContext.getString(R.string.format_datetime_mdhm),
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notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
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// 获取当前笔记的ID
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String noteId = notesCursor.getString(NOTE_COLUMN_ID);
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// 调用方法导出指定ID的笔记到文本
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exportNoteToText(noteId, ps);
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} while (notesCursor.moveToNext()); // 循环直到所有笔记都被处理
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}
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// 关闭Cursor
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notesCursor.close();
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}
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}
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/**
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* Export note identified by id to a print stream
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*/
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private void exportNoteToText(String noteId, PrintStream ps) {
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// 使用内容解析器查询指定笔记的数据
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Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI,
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DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[] {
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noteId
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}, null);
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// 检查返回的Cursor是否为null
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if (dataCursor != null) {
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// 移动Cursor到第一行,如果Cursor不为空且至少有一行数据
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if (dataCursor.moveToFirst()) {
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do {
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// 获取当前数据的MIME类型
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|
String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 如果MIME类型表示这是一个电话笔记
|
|
|
|
|
|
|
|
|
|
if (DataConstants.CALL_NOTE.equals(mimeType)) {
|
|
|
|
|
|
|
|
|
|
// 打印电话号码
|
|
|
|
|
|
|
|
|
|
String phoneNumber = dataCursor.getString(DATA_COLUMN_PHONE_NUMBER);
|
|
|
|
|
|
|
|
|
|
long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE);
|
|
|
|
|
|
|
|
|
|
String location = dataCursor.getString(DATA_COLUMN_CONTENT);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 如果电话号码不为空,则打印电话号码
|
|
|
|
|
|
|
|
|
|
if (!TextUtils.isEmpty(phoneNumber)) {
|
|
|
|
|
|
|
|
|
|
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
|
|
|
|
|
|
|
|
|
|
phoneNumber));
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 打印通话日期
|
|
|
|
|
|
|
|
|
|
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), DateFormat
|
|
|
|
|
|
|
|
|
|
.format(mContext.getString(R.string.format_datetime_mdhm),
|
|
|
|
|
|
|
|
|
|
callDate)));
|
|
|
|
|
|
|
|
|
|
// 如果位置信息不为空,则打印位置信息
|
|
|
|
|
|
|
|
|
|
if (!TextUtils.isEmpty(location)) {
|
|
|
|
|
|
|
|
|
|
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
|
|
|
|
|
|
|
|
|
|
location));
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 如果MIME类型表示这是一个普通笔记
|
|
|
|
|
|
|
|
|
|
else if (DataConstants.NOTE.equals(mimeType)) {
|
|
|
|
|
|
|
|
|
|
// 获取笔记内容
|
|
|
|
|
|
|
|
|
|
String content = dataCursor.getString(DATA_COLUMN_CONTENT);
|
|
|
|
|
|
|
|
|
|
// 如果内容不为空,则打印内容
|
|
|
|
|
|
|
|
|
|
if (!TextUtils.isEmpty(content)) {
|
|
|
|
|
|
|
|
|
|
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
|
|
|
|
|
|
|
|
|
|
content));
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
} while (dataCursor.moveToNext()); // 循环直到所有笔记数据都被处理
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 关闭Cursor
|
|
|
|
|
|
|
|
|
|
dataCursor.close();
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 在每个笔记之后打印一个行分隔符
|
|
|
|
|
|
|
|
|
|
try {
|
|
|
|
|
|
|
|
|
|
ps.write(new byte[] {
|
|
|
|
|
|
|
|
|
|
Character.LINE_SEPARATOR, // 实际上这里应该是只有行分隔符,后面这个字符可能是误加
|
|
|
|
|
|
|
|
|
|
// Character.LETTER_NUMBER // 这行应该是错误的,通常我们只需要行分隔符
|
|
|
|
|
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
} catch (IOException e) {
|
|
|
|
|
|
|
|
|
|
// 捕获并打印异常
|
|
|
|
|
|
|
|
|
|
Log.e(TAG, e.toString());
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
/**
|
|
|
|
|
|
|
|
|
|
* Note will be exported as text which is user readable
|
|
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
public int exportToText() {
|
|
|
|
|
|
|
|
|
|
// 检查外部存储是否可用
|
|
|
|
|
|
|
|
|
|
if (!externalStorageAvailable()) {
|
|
|
|
|
|
|
|
|
|
// 如果外部存储不可用,记录日志并返回存储卡未挂载的状态
|
|
|
|
|
|
|
|
|
|
Log.d(TAG, "Media was not mounted");
|
|
|
|
|
|
|
|
|
|
return STATE_SD_CARD_UNMOUONTED;
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 获取用于导出文本的输出流
|
|
|
|
|
|
|
|
|
|
PrintStream ps = getExportToTextPrintStream();
|
|
|
|
|
|
|
|
|
|
// 如果无法获取输出流,记录错误日志并返回系统错误状态
|
|
|
|
|
|
|
|
|
|
if (ps == null) {
|
|
|
|
|
|
|
|
|
|
Log.e(TAG, "get print stream error");
|
|
|
|
|
|
|
|
|
|
return STATE_SYSTEM_ERROR;
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 首先导出文件夹及其笔记
|
|
|
|
|
|
|
|
|
|
// 使用ContentResolver查询数据库中的文件夹数据
|
|
|
|
|
|
|
|
|
|
Cursor folderCursor = mContext.getContentResolver().query(
|
|
|
|
|
|
|
|
|
|
Notes.CONTENT_NOTE_URI, // 查询的URI
|
|
|
|
|
|
|
|
|
|
NOTE_PROJECTION, // 查询的列
|
|
|
|
|
|
|
|
|
|
"(" + NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER + " AND " // 文件夹类型
|
|
|
|
|
|
|
|
|
|
+ NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + ") OR " // 非垃圾文件夹
|
|
|
|
|
|
|
|
|
|
+ NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER, // 或通话记录文件夹
|
|
|
|
|
|
|
|
|
|
null, null); // 无排序和选择参数
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 如果查询结果不为空
|
|
|
|
|
|
|
|
|
|
if (folderCursor != null) {
|
|
|
|
|
|
|
|
|
|
// 移动到查询结果的第一条记录
|
|
|
|
|
|
|
|
|
|
if (folderCursor.moveToFirst()) {
|
|
|
|
|
|
|
|
|
|
do {
|
|
|
|
|
|
|
|
|
|
// 打印文件夹的名称
|
|
|
|
|
|
|
|
|
|
String folderName = "";
|
|
|
|
|
|
|
|
|
|
// 如果是通话记录文件夹,使用特定的字符串
|
|
|
|
|
|
|
|
|
|
if(folderCursor.getLong(NOTE_COLUMN_ID) == Notes.ID_CALL_RECORD_FOLDER) {
|
|
|
|
|
|
|
|
|
|
folderName = mContext.getString(R.string.call_record_folder_name);
|
|
|
|
|
|
|
|
|
|
} else {
|
|
|
|
|
|
|
|
|
|
// 否则,使用文件夹的摘要(名称)
|
|
|
|
|
|
|
|
|
|
folderName = folderCursor.getString(NOTE_COLUMN_SNIPPET);
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 如果文件夹名称不为空,则格式化并打印
|
|
|
|
|
|
|
|
|
|
if (!TextUtils.isEmpty(folderName)) {
|
|
|
|
|
|
|
|
|
|
ps.println(String.format(getFormat(FORMAT_FOLDER_NAME), folderName));
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 获取文件夹ID,并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()); // 移动到下一条记录
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 关闭Cursor以释放资源
|
|
|
|
|
|
|
|
|
|
folderCursor.close();
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 导出根文件夹中的笔记
|
|
|
|
|
|
|
|
|
|
// 使用ContentResolver查询数据库中的笔记数据
|
|
|
|
|
|
|
|
|
|
Cursor noteCursor = mContext.getContentResolver().query(
|
|
|
|
|
|
|
|
|
|
Notes.CONTENT_NOTE_URI, // 查询的URI
|
|
|
|
|
|
|
|
|
|
NOTE_PROJECTION, // 查询的列
|
|
|
|
|
|
|
|
|
|
NoteColumns.TYPE + "=" + +Notes.TYPE_NOTE + " AND " + NoteColumns.PARENT_ID // 笔记类型且父ID为0(根文件夹)
|
|
|
|
|
|
|
|
|
|
+ "=0", null, null); // 无排序和选择参数
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 如果查询结果不为空
|
|
|
|
|
|
|
|
|
|
if (noteCursor != null) {
|
|
|
|
|
|
|
|
|
|
// 移动到查询结果的第一条记录
|
|
|
|
|
|
|
|
|
|
if (noteCursor.moveToFirst()) {
|
|
|
|
|
|
|
|
|
|
do {
|
|
|
|
|
|
|
|
|
|
// 打印笔记的修改日期
|
|
|
|
|
|
|
|
|
|
ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
|
|
|
|
|
|
|
|
|
|
mContext.getString(R.string.format_datetime_mdhm), // 日期格式
|
|
|
|
|
|
|
|
|
|
noteCursor.getLong(NOTE_COLUMN_MODIFIED_DATE)))); // 笔记的修改日期
|
|
|
|
|
|
|
|
|
|
// 获取笔记ID,并导出该笔记的详细数据
|
|
|
|
|
|
|
|
|
|
String noteId = noteCursor.getString(NOTE_COLUMN_ID);
|
|
|
|
|
|
|
|
|
|
exportNoteToText(noteId, ps);
|
|
|
|
|
|
|
|
|
|
} while (noteCursor.moveToNext()); // 移动到下一条记录
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 关闭Cursor以释放资源
|
|
|
|
|
|
|
|
|
|
noteCursor.close();
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 关闭输出流以释放资源
|
|
|
|
|
|
|
|
|
|
ps.close();
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 返回成功状态
|
|
|
|
|
|
|
|
|
|
return STATE_SUCCESS;
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
/**
|
|
|
|
|
|
|
|
|
|
* Get a print stream pointed to the file defined by generateExportedTextFile.
|
|
|
|
|
|
|
|
|
|
* This method is private and returns a PrintStream object or null if an error occurs.
|
|
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
private PrintStream getExportToTextPrintStream() {
|
|
|
|
|
|
|
|
|
|
// Call a method to generate a file on the SD card.
|
|
|
|
|
|
|
|
|
|
File file = generateFileMountedOnSDcard(mContext, R.string.file_path,
|
|
|
|
|
|
|
|
|
|
R.string.file_name_txt_format);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// If the file generation failed (i.e., file is null), log an error and return null.
|
|
|
|
|
|
|
|
|
|
if (file == null) {
|
|
|
|
|
|
|
|
|
|
Log.e(TAG, "create file to exported failed");
|
|
|
|
|
|
|
|
|
|
return null;
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Store the file name and directory for later use.
|
|
|
|
|
|
|
|
|
|
mFileName = file.getName();
|
|
|
|
|
|
|
|
|
|
mFileDirectory = mContext.getString(R.string.file_path);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Initialize a PrintStream object to null.
|
|
|
|
|
|
|
|
|
|
PrintStream ps = null;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Try to create a FileOutputStream for the file and wrap it in a PrintStream.
|
|
|
|
|
|
|
|
|
|
try {
|
|
|
|
|
|
|
|
|
|
FileOutputStream fos = new FileOutputStream(file);
|
|
|
|
|
|
|
|
|
|
ps = new PrintStream(fos);
|
|
|
|
|
|
|
|
|
|
} catch (FileNotFoundException e) {
|
|
|
|
|
|
|
|
|
|
// If the file was not found, log the error and return null.
|
|
|
|
|
|
|
|
|
|
e.printStackTrace();
|
|
|
|
|
|
|
|
|
|
return null;
|
|
|
|
|
|
|
|
|
|
} catch (NullPointerException e) {
|
|
|
|
|
|
|
|
|
|
// If a NullPointerException occurs (e.g., due to a null file object), log the error and return null.
|
|
|
|
|
|
|
|
|
|
e.printStackTrace();
|
|
|
|
|
|
|
|
|
|
return null;
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Return the PrintStream object if no errors occurred.
|
|
|
|
|
|
|
|
|
|
return ps;
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
|
|
|
|
|
* Generate the text file to store imported data on the SD card.
|
|
|
|
|
|
|
|
|
|
* This method is private and static, returning a File object or null if an error occurs.
|
|
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
|
|
|
|
|
|
|
|
|
|
// Create a StringBuilder to build the file path.
|
|
|
|
|
|
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Append the external storage directory path.
|
|
|
|
|
|
|
|
|
|
sb.append(Environment.getExternalStorageDirectory());
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Append the directory path from resources.
|
|
|
|
|
|
|
|
|
|
sb.append(context.getString(filePathResId));
|
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|
|
// Create a File object for the directory.
|
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|
|
File filedir = new File(sb.toString());
|
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|
|
|
|
|
// Append the formatted file name to the StringBuilder.
|
|
|
|
|
|
|
|
|
|
// The file name includes a date format obtained from resources.
|
|
|
|
|
|
|
|
|
|
sb.append(context.getString(
|
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|
|
|
|
|
|
|
fileNameFormatResId,
|
|
|
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|
|
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|
|
DateFormat.format(context.getString(R.string.format_date_ymd),
|
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|
|
|
|
|
|
|
|
System.currentTimeMillis())));
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
// Create a File object for the full file path.
|
|
|
|
|
|
|
|
|
|
File file = new File(sb.toString());
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
try {
|
|
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|
|
|
|
|
|
|
// If the directory does not exist, create it.
|
|
|
|
|
|
|
|
|
|
if (!filedir.exists()) {
|
|
|
|
|
|
|
|
|
|
filedir.mkdir();
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// If the file does not exist, create it.
|
|
|
|
|
|
|
|
|
|
if (!file.exists()) {
|
|
|
|
|
|
|
|
|
|
file.createNewFile();
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Return the File object if no errors occurred.
|
|
|
|
|
|
|
|
|
|
return file;
|
|
|
|
|
|
|
|
|
|
} catch (SecurityException e) {
|
|
|
|
|
|
|
|
|
|
// If there is a security exception (e.g., no permission to write to external storage), log the error.
|
|
|
|
|
|
|
|
|
|
e.printStackTrace();
|
|
|
|
|
|
|
|
|
|
} catch (IOException e) {
|
|
|
|
|
|
|
|
|
|
// If an I/O error occurs, log the error.
|
|
|
|
|
|
|
|
|
|
e.printStackTrace();
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Return null if an error occurred.
|
|
|
|
|
|
|
|
|
|
return null;
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|