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README.md
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# 5._Open-source-software-reading-annotation

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src/BackupUtils.java
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/*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.micode.notes.tool;
import android.content.Context;
import android.database.Cursor;
import android.os.Environment;
import android.text.TextUtils;
import android.text.format.DateFormat;
import android.util.Log;
import net.micode.notes.R;
import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.DataConstants;
import net.micode.notes.data.Notes.NoteColumns;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
public class BackupUtils {
private static final String TAG = "BackupUtils";
// 单例模式相关变量
private static BackupUtils sInstance;
/**
* 获取BackupUtils的单例实例。
*
* @param context 上下文对象，用于访问应用全局功能。
* @return 返回BackupUtils的单例实例。
*/
public static synchronized BackupUtils getInstance(Context context) {
if (sInstance == null) {
sInstance = new BackupUtils(context);
}
return sInstance;
}
/**
* 定义备份或恢复状态的标志。
*/
// 当前，SD卡未挂载
public static final int STATE_SD_CARD_UNMOUONTED = 0;
// 备份文件不存在
public static final int STATE_BACKUP_FILE_NOT_EXIST = 1;
// 数据格式不正确，可能被其他程序更改
public static final int STATE_DATA_DESTROIED = 2;
// 运行时异常导致恢复或备份失败
public static final int STATE_SYSTEM_ERROR = 3;
// 备份或恢复成功
public static final int STATE_SUCCESS = 4;
private TextExport mTextExport;
/**
* BackupUtils的私有构造函数。
*
* @param context 上下文对象，用于初始化文本导出功能。
*/
private BackupUtils(Context context) {
mTextExport = new TextExport(context);
}
/**
* 检查外部存储是否可用。
*
* @return 如果外部存储可用返回true，否则返回false。
*/
private static boolean externalStorageAvailable() {
return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
}
/**
* 导出数据到文本文件。
*
* @return 返回导出操作的状态码，详见STATE_*常量。
*/
public int exportToText() {
return mTextExport.exportToText();
}
/**
* 获取导出的文本文件名。
*
* @return 返回导出文本文件的名称。
*/
public String getExportedTextFileName() {
return mTextExport.mFileName;
}
/**
* 获取导出的文本文件目录。
*
* @return 返回导出文本文件所在的目录。
*/
public String getExportedTextFileDir() {
return mTextExport.mFileDirectory;
}
/**
* 内部类TextExport，用于执行文本导出操作。
*/
private static class TextExport {
// 查询笔记时需要的列
private static final String[] NOTE_PROJECTION = {
NoteColumns.ID,
NoteColumns.MODIFIED_DATE,
NoteColumns.SNIPPET,
NoteColumns.TYPE
};
// 笔记列的索引
private static final int NOTE_COLUMN_ID = 0;
private static final int NOTE_COLUMN_MODIFIED_DATE = 1;
private static final int NOTE_COLUMN_SNIPPET = 2;
// 查询数据时需要的列
private static final String[] DATA_PROJECTION = {
DataColumns.CONTENT,
DataColumns.MIME_TYPE,
DataColumns.DATA1,
DataColumns.DATA2,
DataColumns.DATA3,
DataColumns.DATA4,
};
// 定义数据列的内容索引
private static final int DATA_COLUMN_CONTENT = 0;
// 定义数据列的MIME类型索引
private static final int DATA_COLUMN_MIME_TYPE = 1;
// 定义数据列的呼叫日期索引
private static final int DATA_COLUMN_CALL_DATE = 2;
// 定义数据列的电话号码索引
private static final int DATA_COLUMN_PHONE_NUMBER = 4;
// 用于导出笔记的文本格式数组
private final String[] TEXT_FORMAT;
// 定义文本格式的索引：文件夹名称
private static final int FORMAT_FOLDER_NAME = 0;
// 定义文本格式的索引：笔记日期
private static final int FORMAT_NOTE_DATE = 1;
// 定义文本格式的索引：笔记内容
private static final int FORMAT_NOTE_CONTENT = 2;
// 上下文对象，用于访问资源和内容解析器
private Context mContext;
// 文件名
private String mFileName;
// 文件目录
private String mFileDirectory;
/**
* 构造函数
*
* @param context 上下文对象，通常是一个Activity或者Application对象
*/
public TextExport(Context context) {
// 初始化文本格式数组
TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note);
mContext = context;
mFileName = "";
mFileDirectory = "";
}
/**
* 根据索引获取文本格式
*
* @param id 索引ID
* @return 返回对应索引的文本格式
*/
private String getFormat(int id) {
return TEXT_FORMAT[id];
}
/**
* 将指定文件夹的笔记导出为文本
*
* @param folderId 文件夹ID
* @param ps 打印流，用于写入导出的文本内容
*/
private void exportFolderToText(String folderId, PrintStream ps) {
// 查询属于该文件夹的笔记
Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI,
NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[]{
folderId
}, null);
if (notesCursor != null) {
if (notesCursor.moveToFirst()) {
do {
// 打印笔记的最后修改日期
ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
mContext.getString(R.string.format_datetime_mdhm),
notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
// 导出该笔记的内容到文本
String noteId = notesCursor.getString(NOTE_COLUMN_ID);
exportNoteToText(noteId, ps);
} while (notesCursor.moveToNext());
}
notesCursor.close();
}
}
/**
* 将指定id的笔记导出到打印流中
*
* @param noteId 笔记的id
* @param ps 打印流，用于输出笔记内容
*/
private void exportNoteToText(String noteId, PrintStream ps) {
// 查询指定id的笔记数据
Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI,
DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[]{
noteId
}, null);
if (dataCursor != null) {
if (dataCursor.moveToFirst()) {
do {
String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE);
if (DataConstants.CALL_NOTE.equals(mimeType)) {
// 处理通话记录类型的笔记
String phoneNumber = dataCursor.getString(DATA_COLUMN_PHONE_NUMBER);
long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE);
String location = dataCursor.getString(DATA_COLUMN_CONTENT);
// 打印电话号码、通话时间、附件位置
if (!TextUtils.isEmpty(phoneNumber)) {
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
phoneNumber));
}
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), DateFormat
.format(mContext.getString(R.string.format_datetime_mdhm),
callDate)));
if (!TextUtils.isEmpty(location)) {
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
location));
}
} else if (DataConstants.NOTE.equals(mimeType)) {
// 处理普通笔记类型
String content = dataCursor.getString(DATA_COLUMN_CONTENT);
if (!TextUtils.isEmpty(content)) {
ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
content));
}
}
} while (dataCursor.moveToNext());
}
dataCursor.close();
}
// 在每个笔记内容之间打印一行分隔符
try {
ps.write(new byte[]{
Character.LINE_SEPARATOR, Character.LETTER_NUMBER
});
} catch (IOException e) {
Log.e(TAG, e.toString());
}
}
/**
* 将所有笔记以文本格式导出
*
* @return 导出操作的状态码，成功返回STATE_SUCCESS，否则返回其他错误状态码
*/
public int exportToText() {
// 检查外部存储器是否可用
if (!externalStorageAvailable()) {
Log.d(TAG, "Media was not mounted");
return STATE_SD_CARD_UNMOUONTED;
}
// 获取用于导出的打印流
PrintStream ps = getExportToTextPrintStream();
if (ps == null) {
Log.e(TAG, "get print stream error");
return STATE_SYSTEM_ERROR;
}
// 首先导出文件夹及其包含的笔记
Cursor folderCursor = mContext.getContentResolver().query(
Notes.CONTENT_NOTE_URI,
NOTE_PROJECTION,
"(" + NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER + " AND "
+ NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + ") OR "
+ NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER, null, null);
if (folderCursor != null) {
if (folderCursor.moveToFirst()) {
do {
// 打印文件夹名称
String folderName = "";
if (folderCursor.getLong(NOTE_COLUMN_ID) == Notes.ID_CALL_RECORD_FOLDER) {
folderName = mContext.getString(R.string.call_record_folder_name);
} else {
folderName = folderCursor.getString(NOTE_COLUMN_SNIPPET);
}
if (!TextUtils.isEmpty(folderName)) {
ps.println(String.format(getFormat(FORMAT_FOLDER_NAME), folderName));
}
String folderId = folderCursor.getString(NOTE_COLUMN_ID);
// 导出文件夹中的笔记
exportFolderToText(folderId, ps);
} while (folderCursor.moveToNext());
}
folderCursor.close();
}
// 导出根文件夹中的笔记
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 {
// 打印笔记的修改时间
ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
mContext.getString(R.string.format_datetime_mdhm),
noteCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
// 导出笔记内容
String noteId = noteCursor.getString(NOTE_COLUMN_ID);
exportNoteToText(noteId, ps);
} while (noteCursor.moveToNext());
}
noteCursor.close();
}
ps.close();
return STATE_SUCCESS;
}
/**
* 获取指向文件{@generateExportedTextFile}的打印流
* 该方法尝试在SD卡上生成一个指定格式的文本文件，并返回指向该文件的PrintStream对象。
* 如果文件生成失败，则返回null。
*
* @return PrintStream 指向生成的文本文件的打印流，如果失败则返回null。
*/
private PrintStream getExportToTextPrintStream() {
// 生成文件
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"); // 文件创建失败
return null;
}
// 更新文件名和文件目录信息
mFileName = file.getName();
mFileDirectory = mContext.getString(R.string.file_path);
PrintStream ps = null;
try {
FileOutputStream fos = new FileOutputStream(file); // 创建文件输出流
ps = new PrintStream(fos); // 将文件输出流包装成PrintStream
} catch (FileNotFoundException e) {
e.printStackTrace();
return null; // 文件未找到异常，返回null
} catch (NullPointerException e) {
e.printStackTrace();
return null; // 空指针异常，返回null
}
return ps; // 返回PrintStream对象
}
}
/**
* 在SD卡上生成用于存储导入数据的文本文件
*
* @param context 上下文对象，用于访问应用的资源和内容提供者
* @param filePathResId 路径字符串资源ID，指定文件存储的路径
* @param fileNameFormatResId 文件名格式字符串资源ID，用于生成带有日期的文件名
* @return 返回创建的文件对象，如果创建失败则返回null
*/
private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
StringBuilder sb = new StringBuilder();
// 拼接SD卡的根目录
sb.append(Environment.getExternalStorageDirectory());
// 拼接从资源id获取的路径字符串
sb.append(context.getString(filePathResId));
// 创建文件目录对象
File filedir = new File(sb.toString());
// 拼接文件名，文件名包含日期信息
sb.append(context.getString(
fileNameFormatResId,
DateFormat.format(context.getString(R.string.format_date_ymd),
System.currentTimeMillis())));
// 根据拼接的路径创建文件对象
File file = new File(sb.toString());
try {
// 如果文件目录不存在，则创建文件目录
if (!filedir.exists()) {
filedir.mkdir();
}
// 如果文件不存在，则创建新文件
if (!file.exists()) {
file.createNewFile();
}
return file;
} catch (SecurityException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// 如果遇到异常，返回null
return null;
}
}

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src/Contact.java
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/*
* Contact 类用于通过电话号码查询联系人信息。
* 该类实现了从联系人数据库中获取与特定电话号码相关联的显示名称
*/
package net.micode.notes.data;
import android.content.Context;
import android.database.Cursor;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.provider.ContactsContract.Data;
import android.telephony.PhoneNumberUtils;
import android.util.Log;
import java.util.HashMap;
public class Contact {
// 缓存已查询过的电话号码和对应的联系人名称，以减少数据库查询次数。
private static HashMap<String, String> sContactCache;
private static final String TAG = "Contact"; // 日志标签
// 用于查询具有完整国际号码格式的电话号码的selection字符串。
private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
+ ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
+ " AND " + Data.RAW_CONTACT_ID + " IN "
+ "(SELECT raw_contact_id "
+ " FROM phone_lookup"
+ " WHERE min_match = '+')";
/**
* 根据电话号码获取联系人名称。
*
* @param context 上下文对象，用于访问内容解析器。
* @param phoneNumber 需要查询的电话号码。
* @return 与电话号码相关联的联系人名称，如果找不到则返回null。
*/
public static String getContact(Context context, String phoneNumber) {
// 初始化或获取联系人缓存
if (sContactCache == null) {
sContactCache = new HashMap<String, String>();
}
// 从缓存中直接获取联系人名称，如果存在。
if (sContactCache.containsKey(phoneNumber)) {
return sContactCache.get(phoneNumber);
}
// 使用PhoneNumberUtils将电话号码格式化为适合查询的形式
String selection = CALLER_ID_SELECTION.replace("+",
PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
// 执行查询以获取与电话号码相关联的联系人名称
Cursor cursor = context.getContentResolver().query(
Data.CONTENT_URI,
new String[]{Phone.DISPLAY_NAME},
selection,
new String[]{phoneNumber},
null);
if (cursor != null && cursor.moveToFirst()) {
try {
// 从查询结果中获取联系人名称并加入缓存
String name = cursor.getString(0);
sContactCache.put(phoneNumber, name);
return name;
} catch (IndexOutOfBoundsException e) {
// 处理查询结果异常
Log.e(TAG, " Cursor get string error " + e.toString());
return null;
} finally {
// 关闭游标
cursor.close();
}
} else {
// 如果查询无结果，记录日志
Log.d(TAG, "No contact matched with number:" + phoneNumber);
return null;
}
}
}

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/*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.micode.notes.tool;
import android.content.ContentProviderOperation;
import android.content.ContentProviderResult;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.OperationApplicationException;
import android.database.Cursor;
import android.os.RemoteException;
import android.util.Log;
import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.CallNote;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;
import java.util.ArrayList;
import java.util.HashSet;
public class DataUtils {
public static final String TAG = "DataUtils";
/**
* 批量删除笔记
*
* @param resolver 内容解析器
* @param ids 要删除的笔记ID集合
* @return 如果删除成功或集合为空或为null，则返回true，否则返回false
*/
public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {
if (ids == null) {
Log.d(TAG, "the ids is null");
return true;
}
if (ids.size() == 0) {
Log.d(TAG, "no id is in the hashset");
return true;
}
// 构建删除操作的列表
ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
for (long id : ids) {
if (id == Notes.ID_ROOT_FOLDER) {
Log.e(TAG, "Don't delete system folder root");
continue;
}
ContentProviderOperation.Builder builder = ContentProviderOperation
.newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
operationList.add(builder.build());
}
try {
ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
// 检查删除结果
if (results == null || results.length == 0 || results[0] == null) {
Log.d(TAG, "delete notes failed, ids:" + ids.toString());
return false;
}
return true;
} catch (RemoteException e) {
Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
} catch (OperationApplicationException e) {
Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
}
return false;
}
/**
* 将笔记移动到指定文件夹
*
* @param resolver 内容解析器
* @param id 笔记ID
* @param srcFolderId 原始文件夹ID
* @param desFolderId 目标文件夹ID
*/
public static void moveNoteToFoler(ContentResolver resolver, long id, long srcFolderId, long desFolderId) {
ContentValues values = new ContentValues();
values.put(NoteColumns.PARENT_ID, desFolderId);
values.put(NoteColumns.ORIGIN_PARENT_ID, srcFolderId);
values.put(NoteColumns.LOCAL_MODIFIED, 1);
resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null);
}
/**
* 批量将笔记移动到指定文件夹
*
* @param resolver 内容解析器
* @param ids 要移动的笔记ID集合
* @param folderId 目标文件夹ID
* @return 如果移动成功或集合为空或为null，则返回true，否则返回false
*/
public static boolean batchMoveToFolder(ContentResolver resolver, HashSet<Long> ids,
long folderId) {
if (ids == null) {
Log.d(TAG, "the ids is null");
return true;
}
// 构建更新操作的列表
ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
for (long id : ids) {
ContentProviderOperation.Builder builder = ContentProviderOperation
.newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
builder.withValue(NoteColumns.PARENT_ID, folderId);
builder.withValue(NoteColumns.LOCAL_MODIFIED, 1);
operationList.add(builder.build());
}
try {
ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
// 检查移动结果
if (results == null || results.length == 0 || results[0] == null) {
Log.d(TAG, "move notes failed, ids:" + ids.toString());
return false;
}
return true;
} catch (RemoteException e) {
Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
} catch (OperationApplicationException e) {
Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
}
return false;
}
/**
* 获取除系统文件夹外的所有用户文件夹数量
*
* @param resolver 内容解析器
* @return 用户文件夹数量
*/
public static int getUserFolderCount(ContentResolver resolver) {
Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI,
new String[]{"COUNT(*)"},
NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>?",
new String[]{String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)},
null);
int count = 0;
if (cursor != null) {
if (cursor.moveToFirst()) {
try {
count = cursor.getInt(0);
} catch (IndexOutOfBoundsException e) {
Log.e(TAG, "get folder count failed:" + e.toString());
} finally {
cursor.close();
}
}
}
return count;
}
/**
* 检查指定类型的笔记在数据库中是否可见
*
* @param resolver 内容解析器
* @param noteId 笔记ID
* @param type 笔记类型
* @return 如果可见，则返回true，否则返回false
*/
public static boolean visibleInNoteDatabase(ContentResolver resolver, long noteId, int type) {
Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
null,
NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER,
new String[]{String.valueOf(type)},
null);
boolean exist = false;
if (cursor != null) {
if (cursor.getCount() > 0) {
exist = true;
}
cursor.close();
}
return exist;
}
/**
* 检查指定的笔记ID在数据库中是否存在
*
* @param resolver 内容解析器
* @param noteId 笔记ID
* @return 如果存在，则返回true，否则返回false
*/
public static boolean existInNoteDatabase(ContentResolver resolver, long noteId) {
Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
null, null, null, null);
boolean exist = false;
if (cursor != null) {
if (cursor.getCount() > 0) {
exist = true;
}
cursor.close();
}
return exist;
}
/**
* 检查指定的数据ID在数据库中是否存在
*
* @param resolver 内容解析器
* @param dataId 数据ID
* @return 如果存在，则返回true，否则返回false
*/
public static boolean existInDataDatabase(ContentResolver resolver, long dataId) {
Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId),
null, null, null, null);
boolean exist = false;
if (cursor != null) {
if (cursor.getCount() > 0) {
exist = true;
}
cursor.close();
}
return exist;
}
/**
* 检查文件夹名称是否在数据库中已存在（不包括系统文件夹）
*
* @param resolver 内容解析器
* @param name 文件夹名称
* @return 如果已存在，则返回true，否则返回false
*/
public static boolean checkVisibleFolderName(ContentResolver resolver, String name) {
Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, null,
NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER +
" AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER +
" AND " + NoteColumns.SNIPPET + "=?",
new String[]{name}, null);
boolean exist = false;
if (cursor != null) {
if (cursor.getCount() > 0) {
exist = true;
}
cursor.close();
}
return exist;
}
/**
* 获取指定文件夹中的笔记小部件信息集合
*
* @param resolver 内容解析器
* @param folderId 文件夹ID
* @return 笔记小部件信息集合
*/
public static HashSet<AppWidgetAttribute> getFolderNoteWidget(ContentResolver resolver, long folderId) {
Cursor c = resolver.query(Notes.CONTENT_NOTE_URI,
new String[]{NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE},
NoteColumns.PARENT_ID + "=?",
new String[]{String.valueOf(folderId)},
null);
HashSet<AppWidgetAttribute> set = null;
if (c != null) {
if (c.moveToFirst()) {
set = new HashSet<AppWidgetAttribute>();
do {
try {
AppWidgetAttribute widget = new AppWidgetAttribute();
widget.widgetId = c.getInt(0);
widget.widgetType = c.getInt(1);
set.add(widget);
} catch (IndexOutOfBoundsException e) {
Log.e(TAG, e.toString());
}
} while (c.moveToNext());
}
c.close();
}
return set;
}
/**
* 通过笔记ID获取关联的通话号码
*
* @param resolver 内容解析器
* @param noteId 笔记ID
* @return 通话号码，如果未找到则返回空字符串
*/
public static String getCallNumberByNoteId(ContentResolver resolver, long noteId) {
Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
new String[]{CallNote.PHONE_NUMBER},
CallNote.NOTE_ID + "=? AND " + CallNote.MIME_TYPE + "=?",
new String[]{String.valueOf(noteId), CallNote.CONTENT_ITEM_TYPE},
null);
if (cursor != null && cursor.moveToFirst()) {
try {
return cursor.getString(0);
} catch (IndexOutOfBoundsException e) {
Log.e(TAG, "Get call number fails " + e.toString());
} finally {
cursor.close();
}
}
return "";
}
/**
* 根据电话号码和通话日期获取对应的笔记ID
*
* @param resolver 内容解析器
* @param phoneNumber 电话号码
* @param callDate 通话日期
* @return 笔记ID，未找到则返回0
*/
public static long getNoteIdByPhoneNumberAndCallDate(ContentResolver resolver, String phoneNumber, long callDate) {
Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
new String[]{CallNote.NOTE_ID},
CallNote.CALL_DATE + "=? AND " + CallNote.MIME_TYPE + "=? AND PHONE_NUMBERS_EQUAL("
+ CallNote.PHONE_NUMBER + ",?)",
new String[]{String.valueOf(callDate), CallNote.CONTENT_ITEM_TYPE, phoneNumber},
null);
if (cursor != null) {
if (cursor.moveToFirst()) {
try {
return cursor.getLong(0);
} catch (IndexOutOfBoundsException e) {
Log.e(TAG, "Get call note id fails " + e.toString());
}
}
cursor.close();
}
return 0;
}
/**
* 根据笔记ID从数据库中获取笔记的摘要。
*
* @param resolver 内容解析器，用于查询数据库。
* @param noteId 笔记的ID，用于定位特定的笔记。
* @return 笔记的摘要字符串。如果找不到对应的笔记，将抛出IllegalArgumentException。
*/
public static String getSnippetById(ContentResolver resolver, long noteId) {
// 使用内容解析器查询特定ID的笔记的摘要
Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI,
new String[]{NoteColumns.SNIPPET},
NoteColumns.ID + "=?",
new String[]{String.valueOf(noteId)},
null);
if (cursor != null) {
String snippet = "";
// 如果查询结果不为空，尝试获取摘要
if (cursor.moveToFirst()) {
snippet = cursor.getString(0);
}
// 关闭游标
cursor.close();
return snippet;
}
// 如果找不到指定ID的笔记，抛出异常
throw new IllegalArgumentException("Note is not found with id: " + noteId);
}
/**
* 格式化摘要字符串。
* 主要用于去除字符串两端的空白字符，以及截取至第一个换行符之前的内容。
*
* @param snippet 需要格式化的摘要字符串。
* @return 格式化后的摘要字符串。
*/
public static String getFormattedSnippet(String snippet) {
// 如果摘要字符串不为空，进行格式化处理
if (snippet != null) {
snippet = snippet.trim(); // 去除两端的空白字符
int index = snippet.indexOf('\n'); // 查找第一个换行符的位置
if (index != -1) {
snippet = snippet.substring(0, index); // 截取至第一个换行符之前
}
}
return snippet;
}
}

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/*
* GTaskStringUtils 类定义
* 该类提供了一系列与GTask相关的字符串常量，用于在操作GTask数据时标识各种JSON属性。
*/
package net.micode.notes.tool;
public class GTaskStringUtils {
// GTask JSON对象中各种属性的键名
public final static String GTASK_JSON_ACTION_ID = "action_id"; // 动作ID
public final static String GTASK_JSON_ACTION_LIST = "action_list"; // 动作列表
public final static String GTASK_JSON_ACTION_TYPE = "action_type"; // 动作类型
public final static String GTASK_JSON_ACTION_TYPE_CREATE = "create"; // 创建动作类型
public final static String GTASK_JSON_ACTION_TYPE_GETALL = "get_all"; // 获取所有动作类型
public final static String GTASK_JSON_ACTION_TYPE_MOVE = "move"; // 移动动作类型
public final static String GTASK_JSON_ACTION_TYPE_UPDATE = "update"; // 更新动作类型
public final static String GTASK_JSON_CREATOR_ID = "creator_id"; // 创建者ID
public final static String GTASK_JSON_CHILD_ENTITY = "child_entity"; // 子实体
public final static String GTASK_JSON_CLIENT_VERSION = "client_version"; // 客户端版本
public final static String GTASK_JSON_COMPLETED = "completed"; // 完成状态
public final static String GTASK_JSON_CURRENT_LIST_ID = "current_list_id"; // 当前列表ID
public final static String GTASK_JSON_DEFAULT_LIST_ID = "default_list_id"; // 默认列表ID
public final static String GTASK_JSON_DELETED = "deleted"; // 删除状态
public final static String GTASK_JSON_DEST_LIST = "dest_list"; // 目标列表
public final static String GTASK_JSON_DEST_PARENT = "dest_parent"; // 目标父实体
public final static String GTASK_JSON_DEST_PARENT_TYPE = "dest_parent_type"; // 目标父实体类型
public final static String GTASK_JSON_ENTITY_DELTA = "entity_delta"; // 实体增量
public final static String GTASK_JSON_ENTITY_TYPE = "entity_type"; // 实体类型
public final static String GTASK_JSON_GET_DELETED = "get_deleted"; // 获取已删除项
public final static String GTASK_JSON_ID = "id"; // ID
public final static String GTASK_JSON_INDEX = "index"; // 索引
public final static String GTASK_JSON_LAST_MODIFIED = "last_modified"; // 最后修改时间
public final static String GTASK_JSON_LATEST_SYNC_POINT = "latest_sync_point"; // 最新同步点
public final static String GTASK_JSON_LIST_ID = "list_id"; // 列表ID
public final static String GTASK_JSON_LISTS = "lists"; // 列表集合
public final static String GTASK_JSON_NAME = "name"; // 名称
public final static String GTASK_JSON_NEW_ID = "new_id"; // 新ID
public final static String GTASK_JSON_NOTES = "notes"; // 备注
public final static String GTASK_JSON_PARENT_ID = "parent_id"; // 父ID
public final static String GTASK_JSON_PRIOR_SIBLING_ID = "prior_sibling_id"; // 前一个兄弟ID
public final static String GTASK_JSON_RESULTS = "results"; // 结果
public final static String GTASK_JSON_SOURCE_LIST = "source_list"; // 源列表
public final static String GTASK_JSON_TASKS = "tasks"; // 任务集合
public final static String GTASK_JSON_TYPE = "type"; // 类型
public final static String GTASK_JSON_TYPE_GROUP = "GROUP"; // 类型：组
public final static String GTASK_JSON_TYPE_TASK = "TASK"; // 类型：任务
public final static String GTASK_JSON_USER = "user"; // 用户
// MIUI笔记相关的文件夹前缀和元数据键名
public final static String MIUI_FOLDER_PREFFIX = "[MIUI_Notes]"; // MIUI笔记文件夹前缀
public final static String FOLDER_DEFAULT = "Default"; // 默认文件夹名
public final static String FOLDER_CALL_NOTE = "Call_Note"; // 通话笔记文件夹名
public final static String FOLDER_META = "METADATA"; // 元数据文件夹名
// 元数据头部键名
public final static String META_HEAD_GTASK_ID = "meta_gid"; // GTask ID
public final static String META_HEAD_NOTE = "meta_note"; // 笔记内容
public final static String META_HEAD_DATA = "meta_data"; // 元数据
// 元数据笔记名称，不可更新和删除
public final static String META_NOTE_NAME = "[META INFO] DON'T UPDATE AND DELETE";
}

169
src/NoteWidgetProvider.java
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/*
* 注意：此代码段的版权归 MiCode 开源社区所有（www.micode.net）
* 本代码遵循 Apache 2.0 许可证，您可以在 http://www.apache.org/licenses/LICENSE-2.0 查看许可证内容。
*/
package net.micode.notes.widget;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.util.Log;
import android.widget.RemoteViews;
import net.micode.notes.R;
import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.tool.ResourceParser;
import net.micode.notes.ui.NoteEditActivity;
import net.micode.notes.ui.NotesListActivity;
/**
* 笔记小部件提供者抽象类，扩展自AppWidgetProvider，用于管理和更新笔记小部件的内容。
*/
public abstract class NoteWidgetProvider extends AppWidgetProvider {
// 查询笔记时用到的列名数组
public static final String[] PROJECTION = new String[]{
NoteColumns.ID,
NoteColumns.BG_COLOR_ID,
NoteColumns.SNIPPET
};
// 列的索引常量
public static final int COLUMN_ID = 0;
public static final int COLUMN_BG_COLOR_ID = 1;
public static final int COLUMN_SNIPPET = 2;
// 日志标签
private static final String TAG = "NoteWidgetProvider";
/**
* 当小部件被删除时调用，更新数据库中对应小部件的ID为无效ID。
*/
@Override
public void onDeleted(Context context, int[] appWidgetIds) {
ContentValues values = new ContentValues();
values.put(NoteColumns.WIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
for (int i = 0; i < appWidgetIds.length; i++) {
context.getContentResolver().update(Notes.CONTENT_NOTE_URI,
values,
NoteColumns.WIDGET_ID + "=?",
new String[]{String.valueOf(appWidgetIds[i])});
}
}
/**
* 根据小部件ID查询对应的笔记信息。
*
* @param context 上下文
* @param widgetId 小部件ID
* @return 返回查询到的Cursor对象，包含笔记的摘要、背景ID等信息。
*/
private Cursor getNoteWidgetInfo(Context context, int widgetId) {
return context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
PROJECTION,
NoteColumns.WIDGET_ID + "=? AND " + NoteColumns.PARENT_ID + "<>?",
new String[]{String.valueOf(widgetId), String.valueOf(Notes.ID_TRASH_FOLER)},
null);
}
/**
* 更新小部件显示内容的通用方法。
*
* @param context 上下文
* @param appWidgetManager AppWidget管理器
* @param appWidgetIds 小部件ID数组
*/
protected void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
update(context, appWidgetManager, appWidgetIds, false);
}
/**
* 根据是否隐私模式更新小部件显示内容。
*
* @param context 上下文
* @param appWidgetManager AppWidget管理器
* @param appWidgetIds 小部件ID数组
* @param privacyMode 是否为隐私模式
*/
private void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds,
boolean privacyMode) {
for (int i = 0; i < appWidgetIds.length; i++) {
if (appWidgetIds[i] != AppWidgetManager.INVALID_APPWIDGET_ID) {
int bgId = ResourceParser.getDefaultBgId(context);
String snippet = "";
Intent intent = new Intent(context, NoteEditActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
intent.putExtra(Notes.INTENT_EXTRA_WIDGET_ID, appWidgetIds[i]);
intent.putExtra(Notes.INTENT_EXTRA_WIDGET_TYPE, getWidgetType());
Cursor c = getNoteWidgetInfo(context, appWidgetIds[i]);
if (c != null && c.moveToFirst()) {
if (c.getCount() > 1) {
Log.e(TAG, "Multiple message with same widget id:" + appWidgetIds[i]);
c.close();
return;
}
snippet = c.getString(COLUMN_SNIPPET);
bgId = c.getInt(COLUMN_BG_COLOR_ID);
intent.putExtra(Intent.EXTRA_UID, c.getLong(COLUMN_ID));
intent.setAction(Intent.ACTION_VIEW);
} else {
snippet = context.getResources().getString(R.string.widget_havenot_content);
intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
}
if (c != null) {
c.close();
}
RemoteViews rv = new RemoteViews(context.getPackageName(), getLayoutId());
rv.setImageViewResource(R.id.widget_bg_image, getBgResourceId(bgId));
intent.putExtra(Notes.INTENT_EXTRA_BACKGROUND_ID, bgId);
// 为小部件的点击事件设置PendingIntent
PendingIntent pendingIntent = null;
if (privacyMode) {
rv.setTextViewText(R.id.widget_text,
context.getString(R.string.widget_under_visit_mode));
pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], new Intent(
context, NotesListActivity.class), PendingIntent.FLAG_UPDATE_CURRENT);
} else {
rv.setTextViewText(R.id.widget_text, snippet);
pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], intent,
PendingIntent.FLAG_UPDATE_CURRENT);
}
rv.setOnClickPendingIntent(R.id.widget_text, pendingIntent);
appWidgetManager.updateAppWidget(appWidgetIds[i], rv);
}
}
}
/**
* 获取背景资源的ID。
*
* @param bgId 背景ID
* @return 返回对应的资源ID
*/
protected abstract int getBgResourceId(int bgId);
/**
* 获取小部件布局的ID。
*
* @return 返回布局的资源ID
*/
protected abstract int getLayoutId();
/**
* 获取小部件的类型。
*
* @return 返回小部件的类型
*/
protected abstract int getWidgetType();
}

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/*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.micode.notes.data;
import android.net.Uri;
// Notes类定义了与笔记和文件夹相关的常量和数据列接口
public class Notes {
public static final String AUTHORITY = "micode_notes"; // 用于标识内容提供者的授权名
public static final String TAG = "Notes"; // 日志标签
public static final int TYPE_NOTE = 0; // 笔记类型
public static final int TYPE_FOLDER = 1; // 文件夹类型
public static final int TYPE_SYSTEM = 2; // 系统类型
/**
* 下面的ID是系统文件夹的标识符
* {@link Notes#ID_ROOT_FOLDER} 是默认文件夹
* {@link Notes#ID_TEMPARAY_FOLDER} 是属于没有文件夹的笔记
* {@link Notes#ID_CALL_RECORD_FOLDER} 是用于存储通话记录的
*/
public static final int ID_ROOT_FOLDER = 0; // 根文件夹ID
public static final int ID_TEMPARAY_FOLDER = -1; // 临时文件夹ID，用于存放不属于任何文件夹的笔记
public static final int ID_CALL_RECORD_FOLDER = -2; // 通话记录文件夹ID
public static final int ID_TRASH_FOLER = -3; // 垃圾箱文件夹ID
public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date"; // 用于Intent的提醒日期额外数据
public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id"; // 笔记背景色ID
public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id"; // 小部件ID
public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type"; // 小部件类型
public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id"; // 文件夹ID
public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date"; // 通话日期
public static final int TYPE_WIDGET_INVALIDE = -1; // 无效的小部件类型
public static final int TYPE_WIDGET_2X = 0; // 2x小部件类型
public static final int TYPE_WIDGET_4X = 1; // 4x小部件类型
public static class DataConstants {
public static final String NOTE = TextNote.CONTENT_ITEM_TYPE; // 笔记的内容项类型
public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; // 通话记录的内容项类型
}
/**
* 查询所有笔记和文件夹的Uri
*/
public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
/**
* 查询数据的Uri
*/
public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
// 笔记和文件夹的公共列接口
public interface NoteColumns {
/**
* 行的唯一ID
* <P>类型: INTEGER (long)</P>
*/
public static final String ID = "_id";
/**
* 笔记或文件夹的父ID
* <P>类型: INTEGER (long)</P>
*/
public static final String PARENT_ID = "parent_id";
/**
* 创建日期
* <P>类型: INTEGER (long)</P>
*/
public static final String CREATED_DATE = "created_date";
/**
* 最后修改日期
* <P>类型: INTEGER (long)</P>
*/
public static final String MODIFIED_DATE = "modified_date";
/**
* 提醒日期
* <P>类型: INTEGER (long)</P>
*/
public static final String ALERTED_DATE = "alert_date";
/**
* 笔记或文件夹的摘要信息
* <P>类型: TEXT</P>
*/
public static final String SNIPPET = "snippet";
/**
* 笔记的小部件ID
* <P>类型: INTEGER (long)</P>
*/
public static final String WIDGET_ID = "widget_id";
/**
* 笔记的小部件类型
* <P>类型: INTEGER (long)</P>
*/
public static final String WIDGET_TYPE = "widget_type";
/**
* 笔记的背景色ID
* <P>类型: INTEGER (long)</P>
*/
public static final String BG_COLOR_ID = "bg_color_id";
/**
* 笔记是否有附件
* <P>类型: INTEGER</P>
*/
public static final String HAS_ATTACHMENT = "has_attachment";
/**
* 笔记数量
* <P>类型: INTEGER (long)</P>
*/
public static final String NOTES_COUNT = "notes_count";
/**
* 文件夹类型：0-笔记，1-文件夹
* <P>类型: INTEGER</P>
*/
public static final String TYPE = "type";
/**
* 最后同步ID
* <P>类型: INTEGER (long)</P>
*/
public static final String SYNC_ID = "sync_id";
/**
* 标记本地是否已修改
* <P>类型: INTEGER</P>
*/
public static final String LOCAL_MODIFIED = "local_modified";
/**
* 移入临时文件夹前的原始父ID
* <P>类型: INTEGER</P>
*/
public static final String ORIGIN_PARENT_ID = "origin_parent_id";
/**
* Google任务ID
* <P>类型: TEXT</P>
*/
public static final String GTASK_ID = "gtask_id";
/**
* 版本号
* <P>类型: INTEGER (long)</P>
*/
public static final String VERSION = "version";
}
// 数据列接口
public interface DataColumns {
/**
* 行的唯一ID
* <P>类型: INTEGER (long)</P>
*/
public static final String ID = "_id";
/**
* 该项的MIME类型。
* <P>类型: TEXT</P>
*/
public static final String MIME_TYPE = "mime_type";
/**
* 属于的笔记的引用ID
* <P>类型: INTEGER (long)</P>
*/
public static final String NOTE_ID = "note_id";
/**
* 创建日期
* <P>类型: INTEGER (long)</P>
*/
public static final String CREATED_DATE = "created_date";
/**
* 最后修改日期
* <P>类型: INTEGER (long)</P>
*/
public static final String MODIFIED_DATE = "modified_date";
/**
* 数据内容
* <P>类型: TEXT</P>
*/
public static final String CONTENT = "content";
/**
* 通用数据列，具体含义由{@link #MIME_TYPE}决定，用于存储整型数据
* <P>类型: INTEGER</P>
*/
public static final String DATA1 = "data1";
/**
* 通用数据列，具体含义由{@link #MIME_TYPE}决定，用于存储整型数据
* <P>类型: INTEGER</P>
*/
public static final String DATA2 = "data2";
/**
* 通用数据列，具体含义由{@link #MIME_TYPE}决定，用于存储文本数据
* <P>类型: TEXT</P>
*/
public static final String DATA3 = "data3";
/**
* 通用数据列，具体含义由{@link #MIME_TYPE}决定，用于存储文本数据
* <P>类型: TEXT</P>
*/
public static final String DATA4 = "data4";
/**
* 通用数据列，具体含义由{@link #MIME_TYPE}决定，用于存储文本数据
* <P>类型: TEXT</P>
*/
public static final String DATA5 = "data5";
}
// 文本笔记类，实现了DataColumns接口
public static final class TextNote implements DataColumns {
/**
* 模式，指示文本是否在检查列表模式中
* <P>类型: INTEGER 1:检查列表模式 0: 正常模式</P>
*/
public static final String MODE = DATA1;
public static final int MODE_CHECK_LIST = 1;
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note"; // MIME类型定义
public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note"; // 单项MIME类型定义
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note"); // 内容URI定义
}
// 通话记录笔记类，实现了DataColumns接口
public static final class CallNote implements DataColumns {
/**
* 通话日期
* <P>类型: INTEGER (long)</P>
*/
public static final String CALL_DATE = DATA1;
/**
* 电话号码
* <P>类型: TEXT</P>
*/
public static final String PHONE_NUMBER = DATA3;
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note"; // MIME类型定义
public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note"; // 单项MIME类型定义
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note"); // 内容URI定义
}
}

381
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/*
* 该类为Notes数据库的辅助类，负责管理数据库的创建和版本管理。
*/
package net.micode.notes.data;
import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.DataConstants;
import net.micode.notes.data.Notes.NoteColumns;
public class NotesDatabaseHelper extends SQLiteOpenHelper {
// 数据库名称··
private static final String DB_NAME = "note.db";
// 数据库版本号
private static final int DB_VERSION = 4;
// 表接口，定义了数据库中的两个表名
public interface TABLE {
public static final String NOTE = "note";
public static final String DATA = "data";
}
// 日志标签
private static final String TAG = "NotesDatabaseHelper";
// 单例模式，确保数据库辅助类的唯一实例
private static NotesDatabaseHelper mInstance;
// 创建NOTE表的SQL语句
private static final String CREATE_NOTE_TABLE_SQL =
"CREATE TABLE " + TABLE.NOTE + "(" +
NoteColumns.ID + " INTEGER PRIMARY KEY," +
NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
")";
// 创建DATA表的SQL语句
private static final String CREATE_DATA_TABLE_SQL =
"CREATE TABLE " + TABLE.DATA + "(" +
DataColumns.ID + " INTEGER PRIMARY KEY," +
DataColumns.MIME_TYPE + " TEXT NOT NULL," +
DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
DataColumns.DATA1 + " INTEGER," +
DataColumns.DATA2 + " INTEGER," +
DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
")";
// 创建DATA表的NOTE_ID索引的SQL语句
private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
"CREATE INDEX IF NOT EXISTS note_id_index ON " +
TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
// 当更新NOTE表中的PARENT_ID字段时，增加目标文件夹的NOTE_COUNT
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER increase_folder_count_on_update " +
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
" BEGIN " +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END";
// 当从文件夹移动NOTE时，减少源文件夹的NOTE_COUNT
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER decrease_folder_count_on_update " +
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
" BEGIN " +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
" END";
// 当插入新NOTE时，增加目标文件夹的NOTE_COUNT
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
"CREATE TRIGGER increase_folder_count_on_insert " +
" AFTER INSERT ON " + TABLE.NOTE +
" BEGIN " +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END";
// 当删除NOTE时，减少文件夹的NOTE_COUNT
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
"CREATE TRIGGER decrease_folder_count_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE +
" BEGIN " +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
" AND " + NoteColumns.NOTES_COUNT + ">0;" +
" END";
// 当插入DATA时，如果类型为NOTE，则更新关联NOTE的内容
private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
"CREATE TRIGGER update_note_content_on_insert " +
" AFTER INSERT ON " + TABLE.DATA +
" WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
" BEGIN" +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" END";
// 当更新DATA时，如果类型为NOTE，则更新关联NOTE的内容
private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER update_note_content_on_update " +
" AFTER UPDATE ON " + TABLE.DATA +
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
" BEGIN" +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" END";
// 当删除DATA时，如果类型为NOTE，则更新关联NOTE的内容为空
private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
"CREATE TRIGGER update_note_content_on_delete " +
" AFTER delete ON " + TABLE.DATA +
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
" BEGIN" +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.SNIPPET + "=''" +
" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
" END";
// 当删除NOTE时，删除关联的DATA
private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
"CREATE TRIGGER delete_data_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE +
" BEGIN" +
" DELETE FROM " + TABLE.DATA +
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
" END";
// 当删除NOTE时，删除属于该NOTE的子NOTE
private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
"CREATE TRIGGER folder_delete_notes_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE +
" BEGIN" +
" DELETE FROM " + TABLE.NOTE +
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END";
// 当NOTE移动到回收站文件夹时，将所有子NOTE也移动到回收站
private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
"CREATE TRIGGER folder_move_notes_on_trash " +
" AFTER UPDATE ON " + TABLE.NOTE +
" WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
" BEGIN" +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END";
/**
* 构造函数，私有化以防止外部实例化
* context 上下文对象，用于访问应用的资源和其他组件
*/
public NotesDatabaseHelper(Context context) {
super(context, DB_NAME, null, DB_VERSION);
}
/**
* 创建NOTE表，并重新创建NOTE表的触发器，然后创建系统文件夹
*db SQLiteDatabase对象，用于执行SQL创建语句
*/
public void createNoteTable(SQLiteDatabase db) {
db.execSQL(CREATE_NOTE_TABLE_SQL);
reCreateNoteTableTriggers(db);
createSystemFolder(db);
Log.d(TAG, "note table has been created");
}
/**
* 重新创建笔记表的触发器
* db SQLiteDatabase 类型，数据库对象
*/
private void reCreateNoteTableTriggers(SQLiteDatabase db) {
// 删除旧的触发器
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert");
db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
// 创建新的触发器
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER);
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
}
/**
* 创建系统文件夹
* db SQLiteDatabase 类型，数据库对象
*/
private void createSystemFolder(SQLiteDatabase db) {
ContentValues values = new ContentValues();
// 创建通话记录文件夹
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
// 创建根文件夹（默认文件夹）
values.clear();
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
// 创建临时文件夹，用于移动笔记
values.clear();
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
// 创建回收站文件夹
values.clear();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
}
/**
* 创建数据表
* db SQLiteDatabase 类型，数据库对象
*/
public void createDataTable(SQLiteDatabase db) {
db.execSQL(CREATE_DATA_TABLE_SQL);
reCreateDataTableTriggers(db);
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
Log.d(TAG, "data table has been created");
}
/**
* 重新创建数据表的触发器
*db SQLiteDatabase 类型，数据库对象
*/
private void reCreateDataTableTriggers(SQLiteDatabase db) {
// 删除旧的触发器
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
// 创建新的触发器
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
}
/**
* 获取 NotesDatabaseHelper 的单例对象
*context Context 类型，应用上下文
*NotesDatabaseHelper 类型，单例对象
*/
static synchronized NotesDatabaseHelper getInstance(Context context) {
if (mInstance == null) {
mInstance = new NotesDatabaseHelper(context);
}
return mInstance;
}
/**
* 创建数据库表
*
* @param db SQLiteDatabase 类型，数据库对象
*/
@Override
public void onCreate(SQLiteDatabase db) {
createNoteTable(db);
createDataTable(db);
}
/**
* 升级数据库
*
* @param db SQLiteDatabase 类型，数据库对象
* @param oldVersion int 类型，旧版本号
* @param newVersion int 类型，新版本号
*/
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
boolean reCreateTriggers = false;
boolean skipV2 = false;
// 根据旧版本号逐步升级
if (oldVersion == 1) {
upgradeToV2(db);
skipV2 = true; // 这次升级包括从 v2 到 v3 的升级
oldVersion++;
}
if (oldVersion == 2 && !skipV2) {
upgradeToV3(db);
reCreateTriggers = true;
oldVersion++;
}
if (oldVersion == 3) {
upgradeToV4(db);
oldVersion++;
}
if (reCreateTriggers) {
reCreateNoteTableTriggers(db);
reCreateDataTableTriggers(db);
}
if (oldVersion != newVersion) {
throw new IllegalStateException("Upgrade notes database to version " + newVersion
+ "fails");
}
}
/**
* 从版本1升级到版本2
*
* @param db SQLiteDatabase 类型，数据库对象
*/
private void upgradeToV2(SQLiteDatabase db) {
// 删除旧表，创建新表
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
createNoteTable(db);
createDataTable(db);
}
/**
* 从版本2升级到版本3
*
* @param db SQLiteDatabase 类型，数据库对象
*/
private void upgradeToV3(SQLiteDatabase db) {
// 删除未使用的触发器
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
// 添加一个用于 gtask id 的列
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
+ " TEXT NOT NULL DEFAULT ''");
// 添加一个回收站系统文件夹
ContentValues values = new ContentValues();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
}
/**
* 从版本3升级到版本4
*
* @param db SQLiteDatabase 类型，数据库对象
*/
private void upgradeToV4(SQLiteDatabase db) {
// 添加版本号列
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
+ " INTEGER NOT NULL DEFAULT 0");
}
}

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/*
* 该类是Notes应用的内容提供者，负责管理Notes的数据，包括查询、插入、更新和删除操作。
* 它与数据库交互，将操作转换为对数据库的相应操作。
*/
package net.micode.notes.data;
import android.app.SearchManager;
import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Intent;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.text.TextUtils;
import android.util.Log;
import net.micode.notes.R;
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.data.NotesDatabaseHelper.TABLE;
public class NotesProvider extends ContentProvider {
private static final UriMatcher mMatcher;
private NotesDatabaseHelper mHelper;
private static final String TAG = "NotesProvider";
private static final int URI_NOTE = 1;
private static final int URI_NOTE_ITEM = 2;
private static final int URI_DATA = 3;
private static final int URI_DATA_ITEM = 4;
private static final int URI_SEARCH = 5;
private static final int URI_SEARCH_SUGGEST = 6;
// 初始化UriMatcher，用于匹配不同的URI请求
static {
mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM);
mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA);
mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM);
mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH);
mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST);
mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST);
}
/**
* 在搜索结果中，为了显示更多信息，我们会去除标题和内容中的'\n'和空白字符。
*/
private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + ","
+ NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
+ "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + ","
+ "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
+ R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
+ "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
+ "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
// 用于搜索查询的SQL语句
private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
+ " FROM " + TABLE.NOTE
+ " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
+ " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
+ " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
/**
* 当ContentProvider被创建时调用，用于初始化数据库帮助类。
*
* @return 总是返回true。
*/
@Override
public boolean onCreate() {
mHelper = NotesDatabaseHelper.getInstance(getContext());
return true;
}
/**
* 根据URI查询数据。
*
* @param uri 要查询的数据的URI。
* @param projection 要返回的列。
* @param selection 查询条件。
* @param selectionArgs 用于查询条件的参数。
* @param sortOrder 排序顺序。
* @return 返回匹配的Cursor对象。
*/
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) {
Cursor c = null;
SQLiteDatabase db = mHelper.getReadableDatabase();
String id = null;
// 根据URI匹配查询类型
switch (mMatcher.match(uri)) {
case URI_NOTE:
c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
sortOrder);
break;
case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1);
c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs, null, null, sortOrder);
break;
case URI_DATA:
c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
sortOrder);
break;
case URI_DATA_ITEM:
id = uri.getPathSegments().get(1);
c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs, null, null, sortOrder);
break;
case URI_SEARCH:
case URI_SEARCH_SUGGEST:
// 处理搜索建议的特殊逻辑
if (sortOrder != null || projection != null) {
throw new IllegalArgumentException(
"do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
}
String searchString = null;
if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
if (uri.getPathSegments().size() > 1) {
searchString = uri.getPathSegments().get(1);
}
} else {
searchString = uri.getQueryParameter("pattern");
}
if (TextUtils.isEmpty(searchString)) {
return null;
}
try {
searchString = String.format("%%%s%%", searchString);
c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
new String[]{searchString});
} catch (IllegalStateException ex) {
Log.e(TAG, "got exception: " + ex.toString());
}
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
// 设置通知URI，以便数据改变时可以通知
if (c != null) {
c.setNotificationUri(getContext().getContentResolver(), uri);
}
return c;
}
/**
* 在数据库中插入新数据。
*
* @param uri 插入数据的URI。
* @param values 要插入的数据。
* @return 返回插入数据的URI。
*/
@Override
public Uri insert(Uri uri, ContentValues values) {
SQLiteDatabase db = mHelper.getWritableDatabase();
long dataId = 0, noteId = 0, insertedId = 0;
switch (mMatcher.match(uri)) {
case URI_NOTE:
insertedId = noteId = db.insert(TABLE.NOTE, null, values);
break;
case URI_DATA:
if (values.containsKey(DataColumns.NOTE_ID)) {
noteId = values.getAsLong(DataColumns.NOTE_ID);
} else {
Log.d(TAG, "Wrong data format without note id:" + values.toString());
}
insertedId = dataId = db.insert(TABLE.DATA, null, values);
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
// 通知URI改变
if (noteId > 0) {
getContext().getContentResolver().notifyChange(
ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
}
if (dataId > 0) {
getContext().getContentResolver().notifyChange(
ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
}
return ContentUris.withAppendedId(uri, insertedId);
}
/**
* 根据URI删除数据。
*
* @param uri 要删除数据的URI。
* @param selection 删除条件。
* @param selectionArgs 用于删除条件的参数。
* @return 返回被删除的行数。
*/
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
int count = 0;
String id = null;
SQLiteDatabase db = mHelper.getWritableDatabase();
boolean deleteData = false;
switch (mMatcher.match(uri)) {
case URI_NOTE:
selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
count = db.delete(TABLE.NOTE, selection, selectionArgs);
break;
case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1);
/**
* ID小于等于0的笔记是系统文件夹，不允许删除
*/
long noteId = Long.valueOf(id);
if (noteId <= 0) {
break;
}
count = db.delete(TABLE.NOTE,
NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
break;
case URI_DATA:
count = db.delete(TABLE.DATA, selection, selectionArgs);
deleteData = true;
break;
case URI_DATA_ITEM:
id = uri.getPathSegments().get(1);
count = db.delete(TABLE.DATA,
DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
deleteData = true;
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
// 通知URI改变
if (count > 0) {
if (deleteData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
}
getContext().getContentResolver().notifyChange(uri, null);
}
return count;
}
/**
* 更新数据库中的数据。
*
* @param uri 要更新数据的URI。
* @param values 要更新到的数据。
* @param selection 更新条件。
* @param selectionArgs 用于更新条件的参数。
* @return 返回被更新的行数。
*/
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
int count = 0;
String id = null;
SQLiteDatabase db = mHelper.getWritableDatabase();
boolean updateData = false;
switch (mMatcher.match(uri)) {
case URI_NOTE:
increaseNoteVersion(-1, selection, selectionArgs);
count = db.update(TABLE.NOTE, values, selection, selectionArgs);
break;
case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1);
increaseNoteVersion(Long.valueOf(id), selection, selectionArgs);
count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs);
break;
case URI_DATA:
count = db.update(TABLE.DATA, values, selection, selectionArgs);
updateData = true;
break;
case URI_DATA_ITEM:
id = uri.getPathSegments().get(1);
count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs);
updateData = true;
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
// 通知URI改变
if (count > 0) {
if (updateData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
}
getContext().getContentResolver().notifyChange(uri, null);
}
return count;
}
/**
* 解析选择条件，如果存在选择条件，则在条件前后添加" AND (" 和 ')'。
*
* @param selection 用户提供的选择条件。
* @return 如果有选择条件，则返回添加了定界符的选择条件字符串；否则返回空字符串。
*/
private String parseSelection(String selection) {
return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
}
/**
* 增加指定笔记的版本号。
*
* @param id 笔记的ID，如果为正数，则根据ID更新版本号；如果为0或负数，则根据selection参数更新版本号。
* @param selection 用于选择需要更新的笔记的条件字符串，可以为空。
* @param selectionArgs 与selection参数配合使用的参数数组，用于替换selection中的"?"。
*/
private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
StringBuilder sql = new StringBuilder(120);
sql.append("UPDATE ");
sql.append(TABLE.NOTE);
sql.append(" SET ");
sql.append(NoteColumns.VERSION);
sql.append("=" + NoteColumns.VERSION + "+1 ");
// 根据ID或选择条件构建SQL的WHERE子句
if (id > 0 || !TextUtils.isEmpty(selection)) {
sql.append(" WHERE ");
}
if (id > 0) {
sql.append(NoteColumns.ID + "=" + String.valueOf(id));
}
if (!TextUtils.isEmpty(selection)) {
String selectString = id > 0 ? parseSelection(selection) : selection;
// 替换selection中的"?"为selectionArgs中的对应参数
for (String args : selectionArgs) {
selectString = selectString.replaceFirst("\\?", args);
}
sql.append(selectString);
}
mHelper.getWritableDatabase().execSQL(sql.toString());
}
/**
* 根据URI获取对应的MIME类型。
* 本方法是个待实现的方法，当前仅返回null。
*
* @param uri 请求的URI。
* @return 返回null，表示该方法尚未实现。
*/
@Override
public String getType(Uri uri) {
// TODO Auto-generated method stub
return null;
}
}

208
src/ResourceParser.java
Unescape View File

@ -1,208 +0,0 @@
/*
* ResourceParser 类用于管理与应用资源相关的各种静态方法和常量。
*/
package net.micode.notes.tool;
import android.content.Context;
import android.preference.PreferenceManager;
import net.micode.notes.R;
import net.micode.notes.ui.NotesPreferenceActivity;
public class ResourceParser {
// 定义笔记背景颜色的常量
public static final int YELLOW = 0;
public static final int BLUE = 1;
public static final int WHITE = 2;
public static final int GREEN = 3;
public static final int RED = 4;
// 默认背景颜色
public static final int BG_DEFAULT_COLOR = YELLOW;
// 定义文本大小的常量
public static final int TEXT_SMALL = 0;
public static final int TEXT_MEDIUM = 1;
public static final int TEXT_LARGE = 2;
public static final int TEXT_SUPER = 3;
// 默认字体大小
public static final int BG_DEFAULT_FONT_SIZE = TEXT_MEDIUM;
/**
* 笔记背景资源类，提供获取不同背景资源的方法。
*/
public static class NoteBgResources {
// 编辑状态下的背景资源数组
private final static int[] BG_EDIT_RESOURCES = new int[]{
R.drawable.edit_yellow,
R.drawable.edit_blue,
R.drawable.edit_white,
R.drawable.edit_green,
R.drawable.edit_red
};
// 编辑状态下的标题背景资源数组
private final static int[] BG_EDIT_TITLE_RESOURCES = new int[]{
R.drawable.edit_title_yellow,
R.drawable.edit_title_blue,
R.drawable.edit_title_white,
R.drawable.edit_title_green,
R.drawable.edit_title_red
};
// 根据id获取编辑状态下的背景资源
public static int getNoteBgResource(int id) {
return BG_EDIT_RESOURCES[id];
}
// 根据id获取编辑状态下的标题背景资源
public static int getNoteTitleBgResource(int id) {
return BG_EDIT_TITLE_RESOURCES[id];
}
}
/**
* 获取默认笔记背景id。
*
* @param context 上下文对象，用于访问SharedPreferences。
* @return 如果用户设置了背景颜色，则返回一个随机背景颜色id；否则返回默认背景颜色id。
*/
public static int getDefaultBgId(Context context) {
if (PreferenceManager.getDefaultSharedPreferences(context).getBoolean(
NotesPreferenceActivity.PREFERENCE_SET_BG_COLOR_KEY, false)) {
return (int) (Math.random() * NoteBgResources.BG_EDIT_RESOURCES.length);
} else {
return BG_DEFAULT_COLOR;
}
}
/**
* 笔记列表项背景资源类，提供获取不同背景资源的方法。
*/
public static class NoteItemBgResources {
// 第一个列表项的背景资源数组
private final static int[] BG_FIRST_RESOURCES = new int[]{
R.drawable.list_yellow_up,
R.drawable.list_blue_up,
R.drawable.list_white_up,
R.drawable.list_green_up,
R.drawable.list_red_up
};
// 普通列表项的背景资源数组
private final static int[] BG_NORMAL_RESOURCES = new int[]{
R.drawable.list_yellow_middle,
R.drawable.list_blue_middle,
R.drawable.list_white_middle,
R.drawable.list_green_middle,
R.drawable.list_red_middle
};
// 最后一个列表项的背景资源数组
private final static int[] BG_LAST_RESOURCES = new int[]{
R.drawable.list_yellow_down,
R.drawable.list_blue_down,
R.drawable.list_white_down,
R.drawable.list_green_down,
R.drawable.list_red_down,
};
// 单个列表项的背景资源数组
private final static int[] BG_SINGLE_RESOURCES = new int[]{
R.drawable.list_yellow_single,
R.drawable.list_blue_single,
R.drawable.list_white_single,
R.drawable.list_green_single,
R.drawable.list_red_single
};
// 获取第一个列表项的背景资源
public static int getNoteBgFirstRes(int id) {
return BG_FIRST_RESOURCES[id];
}
// 获取最后一个列表项的背景资源
public static int getNoteBgLastRes(int id) {
return BG_LAST_RESOURCES[id];
}
// 获取单个列表项的背景资源
public static int getNoteBgSingleRes(int id) {
return BG_SINGLE_RESOURCES[id];
}
// 获取普通列表项的背景资源
public static int getNoteBgNormalRes(int id) {
return BG_NORMAL_RESOURCES[id];
}
// 获取文件夹背景资源
public static int getFolderBgRes() {
return R.drawable.list_folder;
}
}
/**
* 小部件背景资源类，提供获取小部件背景资源的方法。
*/
public static class WidgetBgResources {
// 2x 小部件背景资源数组
private final static int[] BG_2X_RESOURCES = new int[]{
R.drawable.widget_2x_yellow,
R.drawable.widget_2x_blue,
R.drawable.widget_2x_white,
R.drawable.widget_2x_green,
R.drawable.widget_2x_red,
};
// 根据id获取2x小部件的背景资源
public static int getWidget2xBgResource(int id) {
return BG_2X_RESOURCES[id];
}
// 4x 小部件背景资源数组
private final static int[] BG_4X_RESOURCES = new int[]{
R.drawable.widget_4x_yellow,
R.drawable.widget_4x_blue,
R.drawable.widget_4x_white,
R.drawable.widget_4x_green,
R.drawable.widget_4x_red
};
// 根据id获取4x小部件的背景资源
public static int getWidget4xBgResource(int id) {
return BG_4X_RESOURCES[id];
}
}
/**
* 文本外观资源类，提供获取不同文本外观资源的方法。
*/
public static class TextAppearanceResources {
// 文本外观资源数组
private final static int[] TEXTAPPEARANCE_RESOURCES = new int[]{
R.style.TextAppearanceNormal,
R.style.TextAppearanceMedium,
R.style.TextAppearanceLarge,
R.style.TextAppearanceSuper
};
// 根据id获取文本外观资源
public static int getTexAppearanceResource(int id) {
// 如果id超出资源数组范围，返回默认字体大小
if (id >= TEXTAPPEARANCE_RESOURCES.length) {
return BG_DEFAULT_FONT_SIZE;
}
return TEXTAPPEARANCE_RESOURCES[id];
}
// 获取文本外观资源的数量
public static int getResourcesSize() {
return TEXTAPPEARANCE_RESOURCES.length;
}
}
}
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