From 3b03b9a4ebe76102fb57b84cff5c07cb1b1eace2 Mon Sep 17 00:00:00 2001 From: prwj2peam <1511411184@qq.com> Date: Sun, 22 Sep 2024 23:00:39 +0800 Subject: [PATCH] ADD file via upload --- doc/202230224001代码注释.txt | 1057 ++++++++++++++++++++++++++++++ 1 file changed, 1057 insertions(+) create mode 100644 doc/202230224001代码注释.txt diff --git a/doc/202230224001代码注释.txt b/doc/202230224001代码注释.txt new file mode 100644 index 0000000..aae01c3 --- /dev/null +++ b/doc/202230224001代码注释.txt @@ -0,0 +1,1057 @@ +Contact +/* + * 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; +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 { + // 静态HashMap用于缓存已经查询过的联系人姓名 + private static HashMap sContactCache; + // 日志标签，用于记录日志信息 + private static final String TAG = "Contact"; + // SQL查询字符串的一部分，用于构建完整的SQL查询语句 + 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姓名 + * @param context 应用程序上下文 + * @param phoneNumber 要查询的电话号码 + * @return 如果找到了与电话号码匹配的联系人，则返回联系人姓名；否则返回null + */ + public static String getContact(Context context, String phoneNumber) { + if(sContactCache == null) { + // 如果缓存还没有初始化，则创建一个新的HashMap + sContactCache = new HashMap(); + } +// 检查电话号码是否已经在缓存中 + if(sContactCache.containsKey(phoneNumber)) { + return sContactCache.get(phoneNumber); + } +// 替换CALLER_ID_SELECTION中的占位符，并构建完整的SQL查询字符串 + String selection = CALLER_ID_SELECTION.replace("+", + PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)); + // 创建一个Cursor对象来执行查询 + Cursor cursor = context.getContentResolver().query( + Data.CONTENT_URI, + new String [] { Phone.DISPLAY_NAME }, + selection, + new String[] { phoneNumber }, + null); + + if (cursor != null && cursor.moveToFirst()) { + try { + // 获取第一列（即联系人显示名称）的值 + String name = cursor.getString(0); + // 将查询到的姓名存储在缓存中 + sContactCache.put(phoneNumber, name); + return name; + } catch (IndexOutOfBoundsException e) { + // 如果发生索引越界异常，则记录错误并返回null + Log.e(TAG, " Cursor get string error " + e.toString()); + return null; + } finally { + // 关闭Cursor，防止内存泄漏 + cursor.close(); + } + } else { + // 如果没有找到匹配的联系人，则记录调试信息并返回null + Log.d(TAG, "No contact matched with number:" + phoneNumber); + return null; + } + } +} +Notes +/* + * 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; +public class Notes { + // 定义提供者的权威标识符 + public static final String AUTHORITY = "micode_notes"; + // 用于日志输出的标记 + public static final String TAG = "Notes"; + // 定义不同类型的笔记或文件夹 + public static final int TYPE_NOTE = 0; + public static final int TYPE_FOLDER = 1; + public static final int TYPE_SYSTEM = 2; + + /** + * Following IDs are system folders' identifiers + * {@link Notes#ID_ROOT_FOLDER } is default folder + * {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder + * {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records + */ + // 系统文件夹的ID定义 + 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; + // Intent额外数据键 + public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date"; + public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id"; + public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id"; + public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type"; + public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id"; + public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date"; + // 小部件类型定义 + public static final int TYPE_WIDGET_INVALIDE = -1; + public static final int TYPE_WIDGET_2X = 0; + public static final int TYPE_WIDGET_4X = 1; + // 定义笔记和文件夹的常量类型 + public static class DataConstants { + public static final String NOTE = TextNote.CONTENT_ITEM_TYPE; + public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; + } +// 查询所有笔记和文件夹的URI + /** + * Uri to query all notes and folders + */ + public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note"); + + /** + * Uri to query data + */ + // 查询数据的URI + public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data"); + // 笔记和文件夹的数据列接口 + public interface NoteColumns { + /** + * The unique ID for a row + *

Type: INTEGER (long)

+ */ + // 唯一的行ID + public static final String ID = "_id"; + + /** + * The parent's id for note or folder + *

Type: INTEGER (long)

+ */ + // 笔记或文件夹的父级ID + public static final String PARENT_ID = "parent_id"; + + /** + * Created data for note or folder + *

Type: INTEGER (long)

+ */ + // 创建日期 + public static final String CREATED_DATE = "created_date"; + + /** + * Latest modified date + *

Type: INTEGER (long)

+ */ + // 最后修改日期 + public static final String MODIFIED_DATE = "modified_date"; + + + /** + * Alert date + *

Type: INTEGER (long)

+ */ + // 提醒日期 + public static final String ALERTED_DATE = "alert_date"; + + /** + * Folder's name or text content of note + *

Type: TEXT

+ */ + // 文件夹的名称或笔记的文本内容 + public static final String SNIPPET = "snippet"; + + /** + * Note's widget id + *

Type: INTEGER (long)

+ */ + // 笔记的小部件ID + public static final String WIDGET_ID = "widget_id"; + + /** + * Note's widget type + *

Type: INTEGER (long)

+ */ + public static final String WIDGET_TYPE = "widget_type"; + + /** + * Note's background color's id + *

Type: INTEGER (long)

+ */ + // 笔记背景颜色的ID + public static final String BG_COLOR_ID = "bg_color_id"; + + /** + * For text note, it doesn't has attachment, for multi-media + * note, it has at least one attachment + *

Type: INTEGER

+ */ + // 是否有附件 + public static final String HAS_ATTACHMENT = "has_attachment"; + + /** + * Folder's count of notes + *

Type: INTEGER (long)

+ */ + // 文件夹包含的笔记数量 + public static final String NOTES_COUNT = "notes_count"; + + /** + * The file type: folder or note + *

Type: INTEGER

+ */ + //文件类型：文件夹或笔记 + public static final String TYPE = "type"; + + /** + * The last sync id + *

Type: INTEGER (long)

+ */ + // 上一次同步的ID + public static final String SYNC_ID = "sync_id"; + + /** + * Sign to indicate local modified or not + *

Type: INTEGER

+ */ + // 标记本地是否已修改 + public static final String LOCAL_MODIFIED = "local_modified"; + + /** + * Original parent id before moving into temporary folder + *

Type : INTEGER

+ */ + // 移动到临时文件夹之前的原始父级ID + public static final String ORIGIN_PARENT_ID = "origin_parent_id"; + + /** + * The gtask id + *

Type : TEXT

+ */ + // Google任务的ID + public static final String GTASK_ID = "gtask_id"; + + /** + * The version code + *

Type : INTEGER (long)

+ */ + // 版本号 + public static final String VERSION = "version"; + } + // 数据列接口 + public interface DataColumns { + // 唯一的行ID + public static final String ID = "_id"; + + // 该行代表的项目的MIME类型 + public static final String MIME_TYPE = "mime_type"; + + // 此数据所属笔记的引用ID + public static final String NOTE_ID = "note_id"; + + // 创建日期 + public static final String CREATED_DATE = "created_date"; + + // 最后修改日期 + public static final String MODIFIED_DATE = "modified_date"; + + // 数据的内容 + public static final String CONTENT = "content"; + + // 泛型数据列1，类型为整型 + public static final String DATA1 = "data1"; + + // 泛型数据列2，类型为整型 + public static final String DATA2 = "data2"; + + // 泛型数据列3，类型为文本 + public static final String DATA3 = "data3"; + + // 泛型数据列4，类型为文本 + public static final String DATA4 = "data4"; + + // 泛型数据列5，类型为文本 + public static final String DATA5 = "data5"; + } + + // 文本笔记类，实现DataColumns接口 + public static final class TextNote implements DataColumns { + // 表示文本是否处于列表模式 + public static final String MODE = DATA1; + + // 列表模式常量 + public static final int MODE_CHECK_LIST = 1; + + // 内容类型 + public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note"; + + // 单个条目的内容类型 + public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note"; + + // URI + public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note"); + } + + // 通话记录类，实现DataColumns接口 + public static final class CallNote implements DataColumns { + // 通话日期 + public static final String CALL_DATE = DATA1; + + // 电话号码 + public static final String PHONE_NUMBER = DATA3; + + // 内容类型 + public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note"; + + // 单个条目的内容类型 + public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note"; + + // URI + public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note"); + } +} +NotesDatabaseHelper +/* + * 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.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 { + // 数据库文件名 + private static final String DB_NAME = "note.db"; + + // 数据库版本号 + private static final int DB_VERSION = 4; + + // 定义表格名称的接口 + public interface TABLE { + public static final String NOTE = "note"; // 笔记表名 + public static final String DATA = "data"; // 数据表名 + } + + // 日志标签 + private static final String TAG = "NotesDatabaseHelper"; + + // 单例模式实例变量 + private static NotesDatabaseHelper mInstance; + + // 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," + // 主键，唯一标识每条记录 + NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 父节点ID，默认为0 + NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + // 提醒日期，默认为0 + NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," + // 背景颜色ID，默认为0 + NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建日期，默认为当前时间戳 + NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," + // 是否有附件，默认为0 + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改日期，默认为当前时间戳 + NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + // 笔记数量，默认为0 + NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + // 笔记摘要，默认为空字符串 + NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + // 笔记类型，默认为0 + NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," + // 小部件ID，默认为0 + NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," + // 小部件类型，默认为-1 + NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + // 同步ID，默认为0 + NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," + // 本地修改标志，默认为0 + NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 原始父节点ID，默认为0 + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + // Google任务ID，默认为空字符串 + NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + // 版本号，默认为0 + ")"; + + // 创建数据表的SQL语句 + private static final String CREATE_DATA_TABLE_SQL = + "CREATE TABLE " + TABLE.DATA + "(" + + DataColumns.ID + " INTEGER PRIMARY KEY," + // 主键，唯一标识每条记录 + DataColumns.MIME_TYPE + " TEXT NOT NULL," + // MIME类型，默认不为空 + DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + // 笔记ID，默认为0 + NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建日期，默认为当前时间戳 + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改日期，默认为当前时间戳 + DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," + // 数据内容，默认为空字符串 + DataColumns.DATA1 + " INTEGER," + // 泛型数据1 + DataColumns.DATA2 + " INTEGER," + // 泛型数据2 + DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + // 泛型数据3，默认为空字符串 + DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + // 泛型数据4，默认为空字符串 + DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + // 泛型数据5，默认为空字符串 + ")"; + + // 创建笔记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 + ");"; + + // 当移动笔记到文件夹时增加文件夹笔记计数的触发器SQL语句 + 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 + // 更新笔记的父节点ID之后 + " BEGIN " + + "UPDATE " + TABLE.NOTE + // 更新笔记表 + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1 " + // 新的父节点笔记计数+1 + "WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + // 当前笔记的新父节点ID + "END"; + + // 当从文件夹移动笔记时减少文件夹笔记计数的触发器SQL语句 + 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 + // 更新笔记的父节点ID之后 + " BEGIN " + + " UPDATE " + TABLE.NOTE + // 更新笔记表 + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1 " + // 原父节点笔记计数-1 + "WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + // 原来的父节点ID + " AND " + NoteColumns.NOTES_COUNT + ">0;" + // 并且笔记计数大于0 + "END"; + + /** + * 当插入笔记时增加其父文件夹的笔记计数 + */ + private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER = + "CREATE TRIGGER increase_folder_count_on_insert " + + " AFTER INSERT ON " + TABLE.NOTE + // 插入笔记之后 + " BEGIN " + + " UPDATE " + TABLE.NOTE + // 更新笔记表 + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + // 父节点笔记计数+1 + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + // 笔记的父节点ID + " END"; + + /** + * 当删除笔记时减少其原父文件夹的笔记计数 + */ + private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER = + "CREATE TRIGGER decrease_folder_count_on_delete " + + " AFTER DELETE ON " + TABLE.NOTE + // 删除笔记之后 + " BEGIN " + + " UPDATE " + TABLE.NOTE + // 更新笔记表 + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" + // 原父节点笔记计数-1 + " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + // 原父节点ID + " AND " + NoteColumns.NOTES_COUNT + ">0;" + // 笔记计数大于0 + " END"; + + /** + * 当插入类型为{@link DataConstants#NOTE}的数据时更新笔记内容 + */ + private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER = + "CREATE TRIGGER update_note_content_on_insert " + + " AFTER INSERT ON " + TABLE.DATA + // 插入数据之后 + " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + // 如果数据类型为笔记类型 + " BEGIN" + + " UPDATE " + TABLE.NOTE + // 更新笔记表 + " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + // 笔记摘要设置为新数据的内容 + " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + // 笔记ID + " END"; + + /** + * 当类型为{@link DataConstants#NOTE}的数据更新时更新笔记内容 + */ + private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER = + "CREATE TRIGGER update_note_content_on_update " + + " AFTER UPDATE ON " + TABLE.DATA + // 更新数据之后 + " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + // 如果数据类型为笔记类型 + " BEGIN" + + " UPDATE " + TABLE.NOTE + // 更新笔记表 + " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + // 笔记摘要设置为新数据的内容 + " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + // 笔记ID + " END"; + + /** + * 当类型为{@link DataConstants#NOTE}的数据被删除时清空笔记内容 + */ + private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER = + "CREATE TRIGGER update_note_content_on_delete " + + " AFTER DELETE ON " + TABLE.DATA + // 删除数据之后 + " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + // 如果数据类型为笔记类型 + " BEGIN" + + " UPDATE " + TABLE.NOTE + // 更新笔记表 + " SET " + NoteColumns.SNIPPET + "=''" + // 清空笔记摘要 + " WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" + // 笔记ID + " END"; + + /** + * 当笔记被删除时删除其关联的数据 + */ + private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER = + "CREATE TRIGGER delete_data_on_delete " + + " AFTER DELETE ON " + TABLE.NOTE + // 删除笔记之后 + " BEGIN" + + " DELETE FROM " + TABLE.DATA + // 删除笔记表中的所有数据 + " WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" + // 笔记ID + " END"; + + /** + * 当文件夹被删除时删除其包含的所有笔记 + */ + private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER = + "CREATE TRIGGER folder_delete_notes_on_delete " + + " AFTER DELETE ON " + TABLE.NOTE + // 删除笔记之后 + " BEGIN" + + " DELETE FROM " + TABLE.NOTE + // 删除笔记表中的所有笔记 + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + // 文件夹ID + " END"; + + /** + * 当文件夹被移动到回收站时移动其包含的所有笔记 + */ + private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER = + "CREATE TRIGGER folder_move_notes_on_trash " + + " AFTER UPDATE ON " + TABLE.NOTE + // 更新笔记之后 + " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER + // 如果新的父节点ID为回收站ID + " BEGIN" + + " UPDATE " + TABLE.NOTE + // 更新笔记表 + " SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER + // 笔记的父节点设置为回收站ID + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + // 原父节点ID + " END"; + + /** + * NotesDatabaseHelper构造函数 + * + * @param context 上下文对象 + */ + public NotesDatabaseHelper(Context context) { + super(context, DB_NAME, null, DB_VERSION); // 调用基类构造函数 + } + + /** + * 创建笔记表并重新创建相关的触发器 + * + * @param db 数据库对象 + */ + public void createNoteTable(SQLiteDatabase db) { + db.execSQL(CREATE_NOTE_TABLE_SQL); // 执行创建笔记表的SQL语句 + reCreateNoteTableTriggers(db); // 重新创建笔记表的触发器 + createSystemFolder(db); // 创建系统文件夹 + Log.d(TAG, "note table has been created"); // 记录笔记表已创建的日志信息 + } + + /** + * 重新创建笔记表的触发器 + * + * @param db 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 + * + * @param db 数据库对象 + */ + private void createSystemFolder(SQLiteDatabase db) { + ContentValues values = new ContentValues(); // 创建内容值对象 + + // 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 + 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 + 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); + } + + /** + * 创建数据表并重新创建相关的触发器 + * + * @param db 数据库对象 + */ + public void createDataTable(SQLiteDatabase db) { + db.execSQL(CREATE_DATA_TABLE_SQL); // 执行创建数据表的SQL语句 + reCreateDataTableTriggers(db); // 重新创建数据表的触发器 + db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL); // 创建笔记ID索引 + Log.d(TAG, "data table has been created"); // 记录数据表已创建的日志信息 + } + + /** + * 重新创建数据表的触发器 + * + * @param db 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的单例实例 + * + * @param context 应用程序上下文 + * @return NotesDatabaseHelper的实例 + */ + static synchronized NotesDatabaseHelper getInstance(Context context) { + if (mInstance == null) { // 如果实例不存在，则创建 + mInstance = new NotesDatabaseHelper(context); + } + return mInstance; // 返回实例 + } + + @Override + public void onCreate(SQLiteDatabase db) { + createNoteTable(db); // 创建笔记表 + createDataTable(db); // 创建数据表 + } + + @Override + public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { + boolean reCreateTriggers = false; // 标记是否需要重新创建触发器 + boolean skipV2 = false; // 标记是否跳过v2升级 + + // 检查数据库版本并进行相应的升级步骤 + if (oldVersion == 1) { + upgradeToV2(db); // 升级到v2 + skipV2 = true; // 设置跳过标记，因为此升级已经包含了v2到v3的升级 + oldVersion++; // 更新旧版本号 + } + + if (oldVersion == 2 && !skipV2) { + upgradeToV3(db); // 升级到v3 + reCreateTriggers = true; // 需要重新创建触发器 + oldVersion++; // 更新旧版本号 + } + + if (oldVersion == 3) { + upgradeToV4(db); // 升级到v4 + oldVersion++; // 更新旧版本号 + } + + // 如果需要重新创建触发器，则执行 + if (reCreateTriggers) { + reCreateNoteTableTriggers(db); + reCreateDataTableTriggers(db); + } + + // 检查最终版本号是否与目标版本号匹配 + if (oldVersion != newVersion) { + throw new IllegalStateException("Upgrade notes database to version " + newVersion + + " fails"); + } + } + + /** + * 升级数据库至版本2 + * + * @param db 数据库对象 + */ + private void upgradeToV2(SQLiteDatabase db) { + db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); // 删除旧的笔记表 + db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); // 删除旧的数据表 + createNoteTable(db); // 创建新的笔记表 + createDataTable(db); // 创建新的数据表 + } + + /** + * 升级数据库至版本3 + * + * @param db 数据库对象 + */ + 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); + } + + /** + * 升级数据库至版本4 + * + * @param db 数据库对象 + */ + private void upgradeToV4(SQLiteDatabase db) { + // 添加version列 + db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION + + " INTEGER NOT NULL DEFAULT 0"); + } +} +NotesProvider +/* + * 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 用来匹配不同的 URI 模式 + private static final UriMatcher mMatcher; + + // 数据库帮助类的实例 + private NotesDatabaseHelper mHelper; + + // 日志标签 + private static final String TAG = "NotesProvider"; + + // 定义不同的 URI 匹配码 + 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; + + // 静态初始化块，在类加载时运行一次 + static { + mMatcher = new UriMatcher(UriMatcher.NO_MATCH); // 创建 UriMatcher 对象 + // 注册不同的 URI 模式 + 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); + } + + // 定义一个投影字符串，用于搜索建议 + 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，用于搜索笔记片段 + 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; + + // 当 ContentProvider 被创建时调用 + @Override + public boolean onCreate() { + mHelper = NotesDatabaseHelper.getInstance(getContext()); // 获取数据库帮助类的实例 + return true; // 返回 true 表示成功创建 + } + + // 根据给定的 URI 查询数据 + @Override + public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) { + Cursor c = null; // 初始化游标为 null + SQLiteDatabase db = mHelper.getReadableDatabase(); // 获取可读的数据库实例 + String id = null; // 初始化 id 为 null + // 根据匹配的 URI 进行不同的查询操作 + 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); // 获取 URI 中的 ID 部分 + 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); // 获取 URI 中的 ID 部分 + c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs, null, null, sortOrder); + break; + case URI_SEARCH: + case URI_SEARCH_SUGGEST: + if (sortOrder != null || projection != null) { + throw new IllegalArgumentException("do not specify sortOrder, selection, selectionArgs, or projection with this query"); + } + String searchString = null; // 初始化搜索字符串为 null + if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) { + if (uri.getPathSegments().size() > 1) { + searchString = uri.getPathSegments().get(1); // 获取搜索字符串 + } + } else { + searchString = uri.getQueryParameter("pattern"); // 从查询参数中获取搜索模式 + } + if (TextUtils.isEmpty(searchString)) { + return null; // 如果搜索字符串为空，则返回 null + } + try { + searchString = String.format("%%%s%%", searchString); // 为 LIKE 操作格式化搜索字符串 + c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY, new String[]{searchString}); // 执行 SQL 查询 + } catch (IllegalStateException ex) { + Log.e(TAG, "got exception: " + ex.toString()); // 记录异常信息 + } + break; + default: + throw new IllegalArgumentException("Unknown URI " + uri); // 如果 URI 不匹配任何已知模式，则抛出异常 + } + if (c != null) { + c.setNotificationUri(getContext().getContentResolver(), uri); // 设置通知 URI + } + return c; // 返回查询结果 + } + + + // 实现 ContentProvider 的 insert 方法，用于插入数据到数据库 + @Override + public Uri insert(Uri uri, ContentValues values) { + SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写的数据库实例 + long dataId = 0, noteId = 0, insertedId = 0; // 初始化 ID 变量 + switch (mMatcher.match(uri)) { + case URI_NOTE: // 插入笔记 + insertedId = noteId = db.insert(TABLE.NOTE, null, values); // 插入笔记记录 + break; + case URI_DATA: // 插入数据 + if (values.containsKey(DataColumns.NOTE_ID)) { // 检查是否有笔记 ID + noteId = values.getAsLong(DataColumns.NOTE_ID); // 获取笔记 ID + } else { + Log.d(TAG, "Wrong data format without note id:" + values.toString()); // 日志记录错误信息 + } + insertedId = dataId = db.insert(TABLE.DATA, null, values); // 插入数据记录 + break; + default: + throw new IllegalArgumentException("Unknown URI " + uri); // 如果 URI 不匹配任何已知模式，则抛出异常 + } + // 通知笔记 URI 的变化 + if (noteId > 0) { + getContext().getContentResolver().notifyChange(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null); + } + // 通知数据 URI 的变化 + if (dataId > 0) { + getContext().getContentResolver().notifyChange(ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null); + } + return ContentUris.withAppendedId(uri, insertedId); // 返回新插入的数据的 URI + } + + // 实现 ContentProvider 的 delete 方法，用于删除数据 + @Override + public int delete(Uri uri, String selection, String[] selectionArgs) { + int count = 0; // 初始化删除的数量 + String id = null; // 初始化 ID 字符串 + SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写的数据库实例 + boolean deleteData = false; // 是否删除数据 + switch (mMatcher.match(uri)) { + case URI_NOTE: // 删除笔记 + selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 "; // 修改选择条件 + count = db.delete(TABLE.NOTE, selection, selectionArgs); // 删除笔记记录 + break; + case URI_NOTE_ITEM: // 删除单个笔记项 + id = uri.getPathSegments().get(1); // 获取笔记 ID + long noteId = Long.valueOf(id); + if (noteId <= 0) { // 检查笔记 ID 是否有效 + break; + } + count = db.delete(TABLE.NOTE, NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs); // 删除笔记记录 + break; + case URI_DATA: // 删除数据 + count = db.delete(TABLE.DATA, selection, selectionArgs); // 删除数据记录 + deleteData = true; // 设置标志位 + break; + case URI_DATA_ITEM: // 删除单个数据项 + id = uri.getPathSegments().get(1); // 获取数据 ID + count = db.delete(TABLE.DATA, DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs); // 删除数据记录 + deleteData = true; // 设置标志位 + break; + default: + throw new IllegalArgumentException("Unknown URI " + uri); // 如果 URI 不匹配任何已知模式，则抛出异常 + } + if (count > 0) { // 如果有数据被删除 + if (deleteData) { // 如果是数据被删除，通知笔记 URI 的变化 + getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); + } + getContext().getContentResolver().notifyChange(uri, null); // 通知 URI 的变化 + } + return count; // 返回删除的数据数量 + } + + // 实现 ContentProvider 的 update 方法，用于更新数据 + @Override + public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { + int count = 0; // 初始化更新的数量 + String id = null; // 初始化 ID 字符串 + SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写的数据库实例 + boolean updateData = false; // 是否更新数据 + switch (mMatcher.match(uri)) { + case URI_NOTE: // 更新笔记 + increaseNoteVersion(-1, selection, selectionArgs); // 增加笔记版本号 + count = db.update(TABLE.NOTE, values, selection, selectionArgs); // 更新笔记记录 + break; + case URI_NOTE_ITEM: // 更新单个笔记项 + id = uri.getPathSegments().get(1); // 获取笔记 ID + increaseNoteVersion(Long.valueOf(id), selection, selectionArgs); // 增加笔记版本号 + count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs); // 更新笔记记录 + break; + case URI_DATA: // 更新数据 + count = db.update(TABLE.DATA, values, selection, selectionArgs); // 更新数据记录 + updateData = true; // 设置标志位 + break; + case URI_DATA_ITEM: // 更新单个数据项 + id = uri.getPathSegments().get(1); // 获取数据 ID + count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs); // 更新数据记录 + updateData = true; // 设置标志位 + break; + default: + throw new IllegalArgumentException("Unknown URI " + uri); // 如果 URI 不匹配任何已知模式，则抛出异常 + } + if (count > 0) { // 如果有数据被更新 + if (updateData) { // 如果是数据被更新，通知笔记 URI 的变化 + getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); + } + getContext().getContentResolver().notifyChange(uri, null); // 通知 URI 的变化 + } + return count; // 返回更新的数据数量 + } + + // 解析选择条件的方法 + private String parseSelection(String selection) { + return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""); // 如果选择条件不为空，则返回带有 AND 的条件 + } + + // 增加笔记版本号的方法 + private void increaseNoteVersion(long id, String selection, String[] selectionArgs) { + StringBuilder sql = new StringBuilder(120); // 创建 SQL 语句构建器 + sql.append("UPDATE ").append(TABLE.NOTE).append(" SET ").append(NoteColumns.VERSION).append("=" + NoteColumns.VERSION + "+1 "); // 构建 SQL 语句 + if (id > 0 || !TextUtils.isEmpty(selection)) { + sql.append(" WHERE "); + } + if (id > 0) { + sql.append(NoteColumns.ID + "=" + String.valueOf(id)); // 添加笔记 ID 到 SQL 语句 + } + if (!TextUtils.isEmpty(selection)) { + String selectString = id > 0 ? parseSelection(selection) : selection; // 处理选择条件 + for (String args : selectionArgs) { + selectString = selectString.replaceFirst("\\?", args); // 替换选择条件中的问号 + } + sql.append(selectString); // 添加处理后的选择条件到 SQL 语句 + } + mHelper.getWritableDatabase().execSQL(sql.toString()); // 执行 SQL 语句 + } + + // 实现 ContentProvider 的 getType 方法，用于获取 MIME 类型 + @Override + public String getType(Uri uri) { + // TODO Auto-generated method stub + return null; // 返回 MIME 类型（此处未实现） + } +} \ No newline at end of file