From 7033c4163e5ffd309db60a44881cf71f1f02157a Mon Sep 17 00:00:00 2001 From: xiangjiawei <2974077800@qq.com> Date: Mon, 30 Dec 2024 15:05:57 +0800 Subject: [PATCH] xiangjiawei --- src/Contact.java | 87 ++++++++ src/Notes.java | 298 +++++++++++++++++++++++++++ src/NotesDatabaseHelper.java | 389 +++++++++++++++++++++++++++++++++++ src/NotesProvider.java | 342 ++++++++++++++++++++++++++++++ 4 files changed, 1116 insertions(+) create mode 100644 src/Contact.java create mode 100644 src/Notes.java create mode 100644 src/NotesDatabaseHelper.java create mode 100644 src/NotesProvider.java diff --git a/src/Contact.java b/src/Contact.java new file mode 100644 index 0000000..b9b793b --- /dev/null +++ b/src/Contact.java @@ -0,0 +1,87 @@ +/* + * 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.content.Context; // 导入Android上下文类，用于访问系统资源 +import android.database.Cursor; // 导入Android游标类，用于查询数据库 +import android.provider.ContactsContract.CommonDataKinds.Phone; // 导入Android联系人电话信息类 +import android.provider.ContactsContract.Data; // 导入Android联系人数据类 +import android.telephony.PhoneNumberUtils; // 导入Android电话号码工具类 +import android.util.Log; // 导入Android日志工具类 + +import java.util.HashMap; // 导入Java哈希表类，用于缓存查询结果 + +public class Contact { + // 静态的哈希表，用于缓存电话号码和对应的联系人姓名 + private static HashMap sContactCache; + // 日志标签，用于在日志中标识来自该类的消息 + private static final String TAG = "Contact"; + + // SQL查询条件，用于查找与给定电话号码匹配的联系人信息 + // 使用PHONE_NUMBERS_EQUAL函数比较电话号码，确保号码格式的一致性 + // 限制数据类型为电话号码类型，并通过子查询确保电话号码的最小匹配字符为'+' + 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 = '+')"; + + // 根据给定的电话号码获取联系人的姓名 + public static String getContact(Context context, String phoneNumber) { + // 如果缓存为空，则初始化缓存 + if(sContactCache == null) { + sContactCache = new HashMap(); + } + + // 检查缓存中是否已有该电话号码对应的联系人姓名 + if(sContactCache.containsKey(phoneNumber)) { + return sContactCache.get(phoneNumber); // 如果存在，则直接返回缓存中的姓名 + } + + // 构造SQL查询条件，将占位符"+"替换为电话号码的最小匹配字符 + String selection = CALLER_ID_SELECTION.replace("+", + PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)); + + // 执行数据库查询，获取与电话号码匹配的联系人姓名 + Cursor cursor = context.getContentResolver().query( + Data.CONTENT_URI, // 查询联系人数据表 + new String [] { Phone.DISPLAY_NAME }, // 需要查询的字段：联系人显示名称 + selection, // 查询条件 + new String[] { phoneNumber }, // 查询条件中的占位符参数 + null); // 排序条件，这里为null表示不排序 + + // 检查查询结果是否为空且是否可以移动到第一行 + if (cursor != null && cursor.moveToFirst()) { + try { + String name = cursor.getString(0); // 获取联系人显示名称 + sContactCache.put(phoneNumber, name); // 将查询结果存入缓存 + return name; // 返回联系人姓名 + } catch (IndexOutOfBoundsException e) { + // 如果发生数组越界异常，记录错误日志并返回null + Log.e(TAG, " Cursor get string error " + e.toString()); + return null; + } finally { + cursor.close(); // 关闭游标，释放资源 + } + } else { + // 如果没有找到匹配的联系人，记录调试日志并返回null + Log.d(TAG, "No contact matched with number:" + phoneNumber); + return null; + } + } +} diff --git a/src/Notes.java b/src/Notes.java new file mode 100644 index 0000000..2f2907e --- /dev/null +++ b/src/Notes.java @@ -0,0 +1,298 @@ +/* + * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * 你可以在不违反许可协议的情况下使用此文件。 + * 你可以在以下地址获取许可证的副本： + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * 除非适用法律要求或书面同意，软件 + * 根据许可证分发是按“原样”基础进行的， + * 不附带任何明示或暗示的担保或条件。 + * 请参阅许可证以获取特定语言的权限和 + * 限制。 + */ + +package net.micode.notes.data; + +import android.net.Uri; + +// 定义了一个名为Notes的类，包含了与笔记应用相关的常量和接口 +public class Notes { + // 定义了Content Provider的权限字符串 + public static final String AUTHORITY = "micode_notes"; + // 定义了日志标签字符串 + public static final String TAG = "Notes"; + + // 定义了笔记类型的常量 + 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 + + /** + * 以下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 } 用于不属于任何文件夹的笔记 + * {@link Notes#ID_CALL_RECORD_FOLDER} 用于存储通话记录 + * {@link Notes#ID_TRASH_FOLER} 用于存储已删除的笔记 + */ + public static final int ID_ROOT_FOLDER = 0; + public static final int ID_TEMPARAY_FOLDER = -1; + public static final int ID_CALL_RECORD_FOLDER = -2; + public static final int ID_TRASH_FOLER = -3; + + // 定义了一些Intent的extra键名 + public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date"; // 提醒日期 + public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id"; // 背景颜色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 + + // 定义了小部件类型的常量 + public static final int TYPE_WIDGET_INVALIDE = -1; // 无效的小部件 + public static final int TYPE_WIDGET_2X = 0; // 2x尺寸的小部件 + public static final int TYPE_WIDGET_4X = 1; // 4x尺寸的小部件 + + // 定义一个内部类DataConstants，包含一些与数据类型相关的常量 + public static class DataConstants { + // 定义了文本笔记的数据类型 + public static final String NOTE = TextNote.CONTENT_ITEM_TYPE; + // 定义了通话笔记的数据类型 + public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; + } + + /** + * Uri用于查询所有的笔记和文件夹 + * 解析为：content://micode_notes/note + */ + public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note"); + + /** + * Uri用于查询数据 + * 解析为：content://micode_notes/data + */ + public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data"); + + // 定义了一个接口NoteColumns，包含了一些与笔记和文件夹相关的列名 + public interface NoteColumns { + /** + * 笔记或文件夹的唯一ID + *

类型：INTEGER (long)

+ */ + public static final String ID = "_id"; + + /** + * 笔记或文件夹的父ID + *

类型：INTEGER (long)

+ */ + public static final String PARENT_ID = "parent_id"; + + /** + * 笔记或文件夹的创建日期 + *

类型：INTEGER (long)

+ */ + public static final String CREATED_DATE = "created_date"; + + /** + * 笔记或文件夹的最新修改日期 + *

类型：INTEGER (long)

+ */ + public static final String MODIFIED_DATE = "modified_date"; + + /** + * 笔记的提醒日期 + *

类型：INTEGER (long)

+ */ + public static final String ALERTED_DATE = "alert_date"; + + /** + * 文件夹的名称或笔记的文本内容 + *

类型：TEXT

+ */ + public static final String SNIPPET = "snippet"; + + /** + * 笔记的小部件ID + *

类型：INTEGER (long)

+ */ + public static final String WIDGET_ID = "widget_id"; + + /** + * 笔记的小部件类型 + *

类型：INTEGER (long)

+ */ + public static final String WIDGET_TYPE = "widget_type"; + + /** + * 笔记的背景颜色ID + *

类型：INTEGER (long)

+ */ + public static final String BG_COLOR_ID = "bg_color_id"; + + /** + * 对于文本笔记，它没有附件；对于多媒体笔记，至少有一个附件 + *

类型：INTEGER

+ */ + public static final String HAS_ATTACHMENT = "has_attachment"; + + /** + * 文件夹中的笔记数量 + *

类型：INTEGER (long)

+ */ + public static final String NOTES_COUNT = "notes_count"; + + /** + * 笔记或文件夹的类型 + *

类型：INTEGER

+ */ + public static final String TYPE = "type"; + + /** + * 最后同步ID + *

类型：INTEGER (long)

+ */ + public static final String SYNC_ID = "sync_id"; + + /** + * 标志以指示是否本地修改过 + *

类型：INTEGER

+ */ + public static final String LOCAL_MODIFIED = "local_modified"; + + /** + * 移动到临时文件夹之前的原始父ID + *

类型：INTEGER

+ */ + public static final String ORIGIN_PARENT_ID = "origin_parent_id"; + + /** + * Google任务ID + *

类型：TEXT

+ */ + public static final String GTASK_ID = "gtask_id"; + + /** + * 版本号 + *

类型：INTEGER (long)

+ */ + public static final String VERSION = "version"; + } + + // 定义了一个接口DataColumns，包含了一些与数据相关的列名 + public interface DataColumns { + /** + * 数据的唯一ID + *

类型：INTEGER (long)

+ */ + public static final String ID = "_id"; + + /** + * 此行所代表项目的数据类型（MIME类型）。 + *

类型：TEXT

+ */ + public static final String MIME_TYPE = "mime_type"; + + /** + * 引用此数据属于的笔记ID + *

类型：INTEGER (long)

+ */ + public static final String NOTE_ID = "note_id"; + + /** + * 数据的创建日期 + *

类型：INTEGER (long)

+ */ + public static final String CREATED_DATE = "created_date"; + + /** + * 数据的最新修改日期 + *

类型：INTEGER (long)

+ */ + public static final String MODIFIED_DATE = "modified_date"; + + /** + * 数据的内容 + *

类型：TEXT

+ */ + public static final String CONTENT = "content"; + + /** + * 通用数据列，含义取决于 {@link #MIME_TYPE}，用于整型数据类型 + *

类型：INTEGER

+ */ + public static final String DATA1 = "data1"; + + /** + * 通用数据列，含义取决于 {@link #MIME_TYPE}，用于整型数据类型 + *

类型：INTEGER

+ */ + public static final String DATA2 = "data2"; + + /** + * 通用数据列，含义取决于 {@link #MIME_TYPE}，用于文本数据类型 + *

类型：TEXT

+ */ + public static final String DATA3 = "data3"; + + /** + * 通用数据列，含义取决于 {@link #MIME_TYPE}，用于文本数据类型 + *

类型：TEXT

+ */ + public static final String DATA4 = "data4"; + + /** + * 通用数据列，含义取决于 {@link #MIME_TYPE}，用于文本数据类型 + *

类型：TEXT

+ */ + public static final String DATA5 = "data5"; + } + + // 定义了一个内部类TextNote，继承自DataColumns，表示文本笔记的数据结构 + public static final class TextNote implements DataColumns { + /** + * 模式以指示文本是否处于检查列表模式 + *

类型：Integer 1:检查列表模式 0:正常模式

+ */ + public static final String MODE = DATA1; + + // 定义了文本笔记模式的常量 + public static final int MODE_CHECK_LIST = 1; + + // 定义了文本笔记的MIME类型 + public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note"; + public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note"; + + /** + * 文本笔记的Uri + * 解析为：content://micode_notes/text_note + */ + public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note"); + } + + // 定义了一个内部类CallNote，继承自DataColumns，表示通话笔记的数据结构 + public static final class CallNote implements DataColumns { + /** + * 此记录的通话日期 + *

类型：INTEGER (long)

+ */ + public static final String CALL_DATE = DATA1; + + /** + * 此记录的电话号码 + *

类型：TEXT

+ */ + public static final String PHONE_NUMBER = DATA3; + + // 定义了通话笔记的MIME类型 + public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note"; + public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note"; + + /** + * 通话笔记的Uri + * 解析为：content://micode_notes/call_note + */ + public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note"); + } +} diff --git a/src/NotesDatabaseHelper.java b/src/NotesDatabaseHelper.java new file mode 100644 index 0000000..3674cb6 --- /dev/null +++ b/src/NotesDatabaseHelper.java @@ -0,0 +1,389 @@ +/* + * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * 你可以在不违反许可协议的情况下使用此文件。 + * 你可以在以下地址获取许可证的副本： + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * 除非适用法律要求或书面同意，软件 + * 根据许可证分发是按“原样”基础进行的， + * 不附带任何明示或暗示的担保或条件。 + * 请参阅许可证以获取特定语言的权限和 + * 限制。 + */ + +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; + +// NotesDatabaseHelper 是一个 SQLiteOpenHelper 类的子类，用于管理笔记应用的数据库 +public class NotesDatabaseHelper extends SQLiteOpenHelper { + // 定义了数据库名称 + private static final String DB_NAME = "note.db"; + + // 定义了数据库版本号 + private static final int DB_VERSION = 4; + + // 定义了一个内部接口TABLE，包含了表名常量 + public interface TABLE { + public static final String NOTE = "note"; // 笔记表名 + public static final String DATA = "data"; // 数据表名 + } + + // 定义了日志标签字符串 + private static final String TAG = "NotesDatabaseHelper"; + + // 定义了单例实例 + private static NotesDatabaseHelper mInstance; + + // 定义了创建笔记表的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" + + ")"; + + // 定义了创建 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 ''" + + ")"; + + // 定义了创建数据表中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 + "); "; + + /** + * 当笔记移动到文件夹时，增加文件夹的笔记数量 + */ + 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"; + + /** + * 当笔记从文件夹中移除时，减少文件夹的笔记数量 + */ + 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"; + + /** + * 当向文件夹中插入新笔记时，增加文件夹的笔记数量 + */ + 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"; + + /** + * 当从文件夹中删除笔记时，减少文件夹的笔记数量 + */ + 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"; + + /** + * 当插入类型为 {@link DataConstants#NOTE} 的数据时，更新笔记的内容 + */ + 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"; + + /** + * 当更新类型为 {@link DataConstants#NOTE} 的数据时，更新笔记的内容 + */ + 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"; + + /** + * 当删除类型为 {@link DataConstants#NOTE} 的数据时，清空笔记的内容 + */ + 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"; + + /** + * 当删除笔记时，删除属于该笔记的所有数据 + */ + 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"; + + /** + * 当删除文件夹时，删除属于该文件夹的所有笔记 + */ + 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"; + + /** + * 当文件夹被移动到回收站文件夹时，将文件夹中的所有笔记也移动到回收站文件夹 + */ + 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，初始化数据库帮助器 + public NotesDatabaseHelper(Context context) { + super(context, DB_NAME, null, DB_VERSION); + } + + // 创建笔记表的方法 + public void createNoteTable(SQLiteDatabase db) { + db.execSQL(CREATE_NOTE_TABLE_SQL); + reCreateNoteTableTriggers(db); + createSystemFolder(db); + Log.d(TAG, "note table has been created"); + } + + // 重新创建笔记表触发器的方法 + private void reCreateNoteTableTriggers(SQLiteDatabase db) { + 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"); + + 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); + } + + // 创建系统文件夹的方法 + private void createSystemFolder(SQLiteDatabase db) { + ContentValues values = new ContentValues(); + + /** + * 创建通话记录文件夹，用于存储通话笔记 + */ + 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); + } + + // 创建数据表的方法 + 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"); + } + + // 重新创建数据表触发器的方法 + private void reCreateDataTableTriggers(SQLiteDatabase db) { + 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"); + + 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 单例实例的方法 + static synchronized NotesDatabaseHelper getInstance(Context context) { + if (mInstance == null) { + mInstance = new NotesDatabaseHelper(context); + } + return mInstance; + } + + // 当数据库第一次创建时调用的方法 + @Override + public void onCreate(SQLiteDatabase db) { + createNoteTable(db); + createDataTable(db); + } + + // 当数据库需要升级时调用的方法 + @Override + public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { + boolean reCreateTriggers = false; + boolean skipV2 = false; + + // 如果当前版本是1，直接删除旧表并创建新表 + if (oldVersion == 1) { + upgradeToV2(db); + skipV2 = true; // 这次升级包含了从v2到v3的升级 + oldVersion++; + } + + // 如果当前版本是2，添加新的列并创建系统文件夹 + if (oldVersion == 2 && !skipV2) { + upgradeToV3(db); + reCreateTriggers = true; + oldVersion++; + } + + // 如果当前版本是3，添加版本号列 + if (oldVersion == 3) { + upgradeToV4(db); + oldVersion++; + } + + // 如果需要重新创建触发器，调用相应的方法 + if (reCreateTriggers) { + reCreateNoteTableTriggers(db); + reCreateDataTableTriggers(db); + } + + // 如果升级失败，抛出异常 + if (oldVersion != newVersion) { + throw new IllegalStateException("Upgrade notes database to version " + newVersion + + " fails"); + } + } + + // 升级到数据库版本2的方法 + private void upgradeToV2(SQLiteDatabase db) { + db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); + db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); + createNoteTable(db); + createDataTable(db); + } + + // 升级到数据库版本3的方法 + private void upgradeToV3(SQLiteDatabase db) { + // 删除不再使用的触发器 + 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 gtask id 列 + db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID + + " TEXT NOT NULL DEFAULT ''"); + + // 添加回收站系统文件夹 + 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); + } + + // 升级到数据库版本4的方法 + 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"); + } +} diff --git a/src/NotesProvider.java b/src/NotesProvider.java new file mode 100644 index 0000000..2cd497c --- /dev/null +++ b/src/NotesProvider.java @@ -0,0 +1,342 @@ +/* + * 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.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 { + // UriMatcher用于匹配不同的URI请求，返回相应的请求类型 + private static final UriMatcher mMatcher; + + // 数据库辅助类，用于创建和管理数据库 + private NotesDatabaseHelper mHelper; + + // 日志标签，便于调试和日志记录 + private static final String TAG = "NotesProvider"; + + // 定义URI请求类型常量 + 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; + + // 静态代码块，在类加载时初始化UriMatcher + 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); + } + + /** + * x'0A'表示在sqlite中的'\n'字符。对于搜索结果中的标题和内容， + * 我们将修剪'\n'和空白字符，以便显示更多信息。 + */ + 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; + + // SQL查询语句，用于根据搜索字符串查询笔记片段 + 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; + + // 创建ContentProvider时调用，初始化NotesDatabaseHelper + @Override + public boolean onCreate() { + mHelper = NotesDatabaseHelper.getInstance(getContext()); + return true; + } + + // 根据不同的URI请求类型执行查询操作 + @Override + public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, + String sortOrder) { + Cursor c = null; + SQLiteDatabase db = mHelper.getReadableDatabase(); + String id = null; + switch (mMatcher.match(uri)) { + case URI_NOTE: + // 查询所有笔记 + c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null, + sortOrder); + break; + case URI_NOTE_ITEM: + // 查询特定ID的笔记 + id = uri.getPathSegments().get(1); + c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id + + parseSelection(selection), selectionArgs, null, null, sortOrder); + break; + case URI_DATA: + // 查询所有笔记数据 + c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null, + sortOrder); + break; + case URI_DATA_ITEM: + // 查询特定ID的笔记数据 + 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: + // 搜索时不允许指定排序条件、选择条件、选择参数或投影 + if (sortOrder != null || projection != null) { + throw new IllegalArgumentException( + "不允许在搜索时指定排序条件、选择条件、选择参数或投影"); + } + + String searchString = null; + // 获取搜索字符串 + if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) { + if (uri.getPathSegments().size() > 1) { + searchString = uri.getPathSegments().get(1); + } + } else { + searchString = uri.getQueryParameter("pattern"); + } + + // 如果搜索字符串为空，返回null + if (TextUtils.isEmpty(searchString)) { + return null; + } + + try { + // 格式化搜索字符串，使其可以用于LIKE查询 + searchString = String.format("%%%s%%", searchString); + // 执行搜索查询 + c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY, + new String[] { searchString }); + } catch (IllegalStateException ex) { + Log.e(TAG, "发生异常: " + ex.toString()); + } + break; + default: + // 如果URI请求类型未知，抛出异常 + throw new IllegalArgumentException("未知的URI " + uri); + } + // 设置游标的通知URI，以便内容变化时通知监听者 + if (c != null) { + c.setNotificationUri(getContext().getContentResolver(), uri); + } + return c; + } + + // 根据不同的URI请求类型插入数据 + @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: + // 插入新的笔记 + insertedId = noteId = db.insert(TABLE.NOTE, null, values); + break; + case URI_DATA: + // 插入新的笔记数据 + if (values.containsKey(DataColumns.NOTE_ID)) { + noteId = values.getAsLong(DataColumns.NOTE_ID); + } else { + Log.d(TAG, "数据格式错误，缺少笔记ID:" + values.toString()); + } + insertedId = dataId = db.insert(TABLE.DATA, null, values); + break; + default: + // 如果URI请求类型未知，抛出异常 + throw new IllegalArgumentException("未知的URI " + uri); + } + // 通知笔记URI变化 + if (noteId > 0) { + getContext().getContentResolver().notifyChange( + ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null); + } + + // 通知数据URI变化 + if (dataId > 0) { + getContext().getContentResolver().notifyChange( + ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null); + } + + return ContentUris.withAppendedId(uri, insertedId); + } + + // 根据不同的URI请求类型删除数据 + @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: + // 删除笔记时，确保ID大于0 + selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 "; + count = db.delete(TABLE.NOTE, selection, selectionArgs); + break; + case URI_NOTE_ITEM: + id = uri.getPathSegments().get(1); + long noteId = Long.valueOf(id); + // ID小于等于0的笔记为系统文件夹，不允许删除 + if (noteId <= 0) { + break; + } + // 删除特定ID的笔记 + count = db.delete(TABLE.NOTE, + NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs); + break; + case URI_DATA: + // 删除笔记数据 + count = db.delete(TABLE.DATA, selection, selectionArgs); + deleteData = true; + break; + case URI_DATA_ITEM: + id = uri.getPathSegments().get(1); + // 删除特定ID的笔记数据 + count = db.delete(TABLE.DATA, + DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs); + deleteData = true; + break; + default: + // 如果URI请求类型未知，抛出异常 + throw new IllegalArgumentException("未知的URI " + uri); + } + // 如果有数据被删除，通知URI变化 + if (count > 0) { + if (deleteData) { + getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); + } + getContext().getContentResolver().notifyChange(uri, null); + } + return count; + } + + // 根据不同的URI请求类型更新数据 + @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: + // 更新笔记时，增加笔记版本号 + increaseNoteVersion(-1, selection, selectionArgs); + count = db.update(TABLE.NOTE, values, selection, selectionArgs); + break; + case URI_NOTE_ITEM: + id = uri.getPathSegments().get(1); + long noteId = Long.valueOf(id); + // 更新特定ID的笔记，并增加笔记版本号 + increaseNoteVersion(noteId, selection, selectionArgs); + count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id + + parseSelection(selection), selectionArgs); + break; + case URI_DATA: + // 更新笔记数据 + count = db.update(TABLE.DATA, values, selection, selectionArgs); + updateData = true; + break; + case URI_DATA_ITEM: + id = uri.getPathSegments().get(1); + // 更新特定ID的笔记数据 + count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id + + parseSelection(selection), selectionArgs); + updateData = true; + break; + default: + // 如果URI请求类型未知，抛出异常 + throw new IllegalArgumentException("未知的URI " + uri); + } + + // 如果有数据被更新，通知URI变化 + if (count > 0) { + if (updateData) { + getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); + } + getContext().getContentResolver().notifyChange(uri, null); + } + return count; + } + + // 解析选择条件字符串，如果存在选择条件，则添加到SQL查询中 + private String parseSelection(String selection) { + return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""); + } + + // 增加笔记版本号 + 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 "); + + // 构建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; + for (String args : selectionArgs) { + selectString = selectString.replaceFirst("\\?", args); + } + sql.append(selectString); + } + + // 执行更新操作 + mHelper.getWritableDatabase().execSQL(sql.toString()); + } + + // 返回URI对应的数据类型，这里未实现，返回null + @Override + public String getType(Uri uri) { + // TODO Auto-generated method stub + return null; + } +}