From ed1b5efaf3e8847b2401a607082318b4919ba5ce Mon Sep 17 00:00:00 2001 From: wanghao <2934067726@qq.com> Date: Tue, 13 May 2025 22:47:48 +0800 Subject: [PATCH] second test --- src/data/Contact.java | 37 ++++- src/data/Notes.java | 221 ++++++++++++++++-------------- src/data/NotesDatabaseHelper.java | 176 +++++++++++++++++------- src/data/NotesProvider.java | 119 +++++++++++++--- 4 files changed, 379 insertions(+), 174 deletions(-) diff --git a/src/data/Contact.java b/src/data/Contact.java index d97ac5d..6cc8678 100644 --- a/src/data/Contact.java +++ b/src/data/Contact.java @@ -25,10 +25,18 @@ import android.util.Log; import java.util.HashMap; +/** + * Contact类：用于从系统联系人中查询电话号码对应的联系人姓名 + * 提供了联系人姓名缓存机制，避免重复查询相同号码 + */ public class Contact { + // 联系人缓存：键为电话号码，值为对应的联系人姓名 private static HashMap sContactCache; + // 日志标签 private static final String TAG = "Contact"; + // 联系人ID查询的SQL选择条件模板 + // 用于查找与给定电话号码匹配的联系人 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 " @@ -36,38 +44,55 @@ public class Contact { + " FROM phone_lookup" + " WHERE min_match = '+')"; + /** + * 根据电话号码获取联系人姓名 + * @param context 应用上下文 + * @param phoneNumber 电话号码 + * @return 联系人姓名，如果未找到则返回null + */ public static String getContact(Context context, String phoneNumber) { + // 初始化联系人缓存（如果尚未初始化） if(sContactCache == null) { sContactCache = new HashMap(); } + // 检查缓存中是否已有该号码的联系人信息 if(sContactCache.containsKey(phoneNumber)) { return sContactCache.get(phoneNumber); } + // 构建实际的查询条件，替换模板中的占位符 String selection = CALLER_ID_SELECTION.replace("+", PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)); + + // 执行联系人数据库查询 Cursor cursor = context.getContentResolver().query( - Data.CONTENT_URI, - new String [] { Phone.DISPLAY_NAME }, - selection, - new String[] { phoneNumber }, - null); + Data.CONTENT_URI, // 查询的URI + new String [] { Phone.DISPLAY_NAME }, // 需要返回的字段 + selection, // 查询条件 + new String[] { phoneNumber }, // 查询参数 + null); // 排序方式 + // 处理查询结果 if (cursor != null && cursor.moveToFirst()) { try { + // 获取联系人姓名 String name = cursor.getString(0); + // 将结果存入缓存 sContactCache.put(phoneNumber, name); return name; } catch (IndexOutOfBoundsException e) { + // 处理异常情况 Log.e(TAG, " Cursor get string error " + e.toString()); return null; } finally { + // 确保关闭游标，避免资源泄漏 cursor.close(); } } else { + // 未找到匹配的联系人 Log.d(TAG, "No contact matched with number:" + phoneNumber); return null; } } -} +} \ No newline at end of file diff --git a/src/data/Notes.java b/src/data/Notes.java index f240604..aae7620 100644 --- a/src/data/Notes.java +++ b/src/data/Notes.java @@ -1,4 +1,4 @@ -/* +/** * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) * * Licensed under the Apache License, Version 2.0 (the "License"); @@ -17,263 +17,284 @@ package net.micode.notes.data; import android.net.Uri; + +/** + * Notes类：提供便签应用的数据结构和常量定义 + * 包含便签类型、系统文件夹ID、意图额外数据键名、内容URI以及数据表列定义 + */ public class Notes { + // 内容提供者的授权信息 public static final String AUTHORITY = "micode_notes"; + // 日志标签 public static final String TAG = "Notes"; - public static final int TYPE_NOTE = 0; - public static final int TYPE_FOLDER = 1; - public static final int TYPE_SYSTEM = 2; + + // 便签类型常量 + public static final int TYPE_NOTE = 0; // 普通便签 + public static final int TYPE_FOLDER = 1; // 文件夹 + public static final int TYPE_SYSTEM = 2; // 系统便签 /** - * 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 + * 系统文件夹标识符 + * {@link Notes#ID_ROOT_FOLDER } 是默认文件夹 + * {@link Notes#ID_TEMPARAY_FOLDER } 用于无文件夹归属的便签 + * {@link Notes#ID_CALL_RECORD_FOLDER} 用于存储通话记录 */ - 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; - - 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"; - - public static final int TYPE_WIDGET_INVALIDE = -1; - public static final int TYPE_WIDGET_2X = 0; - public static final int TYPE_WIDGET_4X = 1; + 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 + 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; // 回收站文件夹ID + + // 意图额外数据的键名常量 + 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 + + // 小部件类型常量 + public static final int TYPE_WIDGET_INVALIDE = -1; // 无效小部件 + public static final int TYPE_WIDGET_2X = 0; // 2x大小的小部件 + public static final int TYPE_WIDGET_4X = 1; // 4x大小的小部件 + /** + * 数据常量类 + * 定义便签数据的MIME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; + public static final String NOTE = TextNote.CONTENT_ITEM_TYPE; // 文本便签MIME类型 + public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; // 通话记录便签MIME类型 } /** - * Uri to query all notes and folders + * 用于查询所有便签和文件夹的URI */ public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note"); /** - * Uri to query data + * 用于查询数据的URI */ public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data"); + /** + * 便签表列定义接口 + * 定义了便签表中各字段的名称和含义 + */ public interface NoteColumns { /** - * The unique ID for a row - *

Type: INTEGER (long)

+ * 行的唯一ID + *

类型: INTEGER (long)

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

Type: INTEGER (long)

+ * 便签或文件夹的父ID + *

类型: INTEGER (long)

*/ public static final String PARENT_ID = "parent_id"; /** - * Created data for note or folder - *

Type: INTEGER (long)

+ * 便签或文件夹的创建日期 + *

类型: INTEGER (long)

*/ public static final String CREATED_DATE = "created_date"; /** - * Latest modified date - *

Type: INTEGER (long)

+ * 最新修改日期 + *

类型: INTEGER (long)

*/ public static final String MODIFIED_DATE = "modified_date"; - /** - * Alert date - *

Type: INTEGER (long)

+ * 提醒日期 + *

类型: INTEGER (long)

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

Type: TEXT

+ * 文件夹名称或便签的文本内容摘要 + *

类型: TEXT

*/ public static final String SNIPPET = "snippet"; /** - * Note's widget id - *

Type: INTEGER (long)

+ * 便签的小部件ID + *

类型: INTEGER (long)

*/ public static final String WIDGET_ID = "widget_id"; /** - * Note's widget type - *

Type: INTEGER (long)

+ * 便签的小部件类型 + *

类型: INTEGER (long)

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

Type: INTEGER (long)

+ * 便签的背景颜色ID + *

类型: INTEGER (long)

*/ 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

+ * 对于文本便签，没有附件；对于多媒体便签，至少有一个附件 + *

类型: INTEGER

*/ public static final String HAS_ATTACHMENT = "has_attachment"; /** - * Folder's count of notes - *

Type: INTEGER (long)

+ * 文件夹中的便签数量 + *

类型: INTEGER (long)

*/ public static final String NOTES_COUNT = "notes_count"; /** - * The file type: folder or note - *

Type: INTEGER

+ * 文件类型：文件夹或便签 + *

类型: INTEGER

*/ public static final String TYPE = "type"; /** - * The last sync id - *

Type: INTEGER (long)

+ * 最后同步ID + *

类型: INTEGER (long)

*/ public static final String SYNC_ID = "sync_id"; /** - * Sign to indicate local modified or not - *

Type: INTEGER

+ * 指示本地是否修改的标志 + *

类型: INTEGER

*/ 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ID + *

类型 : INTEGER

*/ public static final String ORIGIN_PARENT_ID = "origin_parent_id"; /** - * The gtask id - *

Type : TEXT

+ * Google任务ID + *

类型 : TEXT

*/ public static final String GTASK_ID = "gtask_id"; /** - * The version code - *

Type : INTEGER (long)

+ * 版本代码 + *

类型 : INTEGER (long)

*/ public static final String VERSION = "version"; } + /** + * 数据表列定义接口 + * 定义了数据表中各字段的名称和含义 + */ public interface DataColumns { /** - * The unique ID for a row - *

Type: INTEGER (long)

+ * 行的唯一ID + *

类型: INTEGER (long)

*/ public static final String ID = "_id"; /** - * The MIME type of the item represented by this row. - *

Type: Text

+ * 此行表示的项目的MIME类型 + *

类型: Text

*/ public static final String MIME_TYPE = "mime_type"; /** - * The reference id to note that this data belongs to - *

Type: INTEGER (long)

+ * 此数据所属便签的引用ID + *

类型: INTEGER (long)

*/ public static final String NOTE_ID = "note_id"; /** - * Created data for note or folder - *

Type: INTEGER (long)

+ * 便签或文件夹的创建日期 + *

类型: INTEGER (long)

*/ public static final String CREATED_DATE = "created_date"; /** - * Latest modified date - *

Type: INTEGER (long)

+ * 最新修改日期 + *

类型: INTEGER (long)

*/ public static final String MODIFIED_DATE = "modified_date"; /** - * Data's content - *

Type: TEXT

+ * 数据内容 + *

类型: TEXT

*/ public static final String CONTENT = "content"; - /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for - * integer data type - *

Type: INTEGER

+ * 通用数据列，含义由{@link #MIMETYPE}指定，用于整数数据类型 + *

类型: INTEGER

*/ public static final String DATA1 = "data1"; /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for - * integer data type - *

Type: INTEGER

+ * 通用数据列，含义由{@link #MIMETYPE}指定，用于整数数据类型 + *

类型: INTEGER

*/ public static final String DATA2 = "data2"; /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for - * TEXT data type - *

Type: TEXT

+ * 通用数据列，含义由{@link #MIMETYPE}指定，用于文本数据类型 + *

类型: TEXT

*/ public static final String DATA3 = "data3"; /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for - * TEXT data type - *

Type: TEXT

+ * 通用数据列，含义由{@link #MIMETYPE}指定，用于文本数据类型 + *

类型: TEXT

*/ public static final String DATA4 = "data4"; /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for - * TEXT data type - *

Type: TEXT

+ * 通用数据列，含义由{@link #MIMETYPE}指定，用于文本数据类型 + *

类型: TEXT

*/ public static final String DATA5 = "data5"; } + /** + * 文本便签类 + * 继承DataColumns接口，定义文本便签特有的常量和URI + */ public static final class TextNote implements DataColumns { /** - * Mode to indicate the text in check list mode or not - *

Type: Integer 1:check list mode 0: normal mode

+ * 模式指示文本是否处于复选列表模式 + *

类型: Integer 1:复选列表模式 0:普通模式

*/ 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"; - public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note"; public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note"); } + /** + * 通话记录便签类 + * 继承DataColumns接口，定义通话记录便签特有的常量和URI + */ public static final class CallNote implements DataColumns { /** - * Call date for this record - *

Type: INTEGER (long)

+ * 此记录的通话日期 + *

类型: INTEGER (long)

*/ public static final String CALL_DATE = DATA1; /** - * Phone number for this record - *

Type: TEXT

+ * 此记录的电话号码 + *

类型: TEXT

*/ public static final String PHONE_NUMBER = DATA3; 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"; public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note"); } -} +} \ No newline at end of file diff --git a/src/data/NotesDatabaseHelper.java b/src/data/NotesDatabaseHelper.java index ffe5d57..3529930 100644 --- a/src/data/NotesDatabaseHelper.java +++ b/src/data/NotesDatabaseHelper.java @@ -26,64 +26,77 @@ import net.micode.notes.data.Notes.DataColumns; import net.micode.notes.data.Notes.DataConstants; import net.micode.notes.data.Notes.NoteColumns; - +/** + * NotesDatabaseHelper类：管理便签应用的SQLite数据库 + * 负责数据库的创建、升级和表结构管理 + * 通过触发器实现便签和文件夹之间的关联和数据一致性 + */ public class NotesDatabaseHelper extends SQLiteOpenHelper { + // 数据库名称 private static final String DB_NAME = "note.db"; + // 数据库版本 private static final int DB_VERSION = 4; + /** + * 表名常量接口 + */ public interface TABLE { - public static final String NOTE = "note"; - - public static final String DATA = "data"; + public static final String NOTE = "note"; // 便签表 + public static final String DATA = "data"; // 数据表 } + // 日志标签 private static final String TAG = "NotesDatabaseHelper"; + // 单例实例 private static NotesDatabaseHelper mInstance; + // 创建便签表的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" + + NoteColumns.ID + " INTEGER PRIMARY KEY," + // 便签ID + NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 父文件夹ID + NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + // 提醒日期 + NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," + // 背景颜色ID + NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建日期 + NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," + // 是否有附件 + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改日期 + NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + // 子便签数量 + NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + // 摘要 + NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + // 类型 + NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," + // 小部件ID + NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," + // 小部件类型 + NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + // 同步ID + NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," + // 本地修改标志 + NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 原始父文件夹ID + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + // Google任务ID + NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + // 版本号 ")"; + // 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," + - 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 ''" + + DataColumns.ID + " INTEGER PRIMARY KEY," + // 数据ID + DataColumns.MIME_TYPE + " TEXT NOT NULL," + // MIME类型 + DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + // 关联的便签ID + NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建日期 + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改日期 + DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," + // 内容 + DataColumns.DATA1 + " INTEGER," + // 通用数据列1 + DataColumns.DATA2 + " INTEGER," + // 通用数据列2 + DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + // 通用数据列3 + DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + // 通用数据列4 + DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + // 通用数据列5 ")"; + // 创建数据表的索引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 + ");"; /** - * Increase folder's note count when move note to the folder + * 当便签移动到新文件夹时，增加目标文件夹的便签计数 */ private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = "CREATE TRIGGER increase_folder_count_on_update "+ @@ -95,7 +108,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Decrease folder's note count when move note from folder + * 当便签移出文件夹时，减少源文件夹的便签计数 */ private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = "CREATE TRIGGER decrease_folder_count_on_update " + @@ -108,7 +121,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Increase folder's note count when insert new note to the folder + * 当插入新便签到文件夹时，增加文件夹的便签计数 */ private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER = "CREATE TRIGGER increase_folder_count_on_insert " + @@ -120,7 +133,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Decrease folder's note count when delete note from the folder + * 当从文件夹中删除便签时，减少文件夹的便签计数 */ private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER = "CREATE TRIGGER decrease_folder_count_on_delete " + @@ -133,7 +146,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Update note's content when insert data with type {@link DataConstants#NOTE} + * 当插入类型为{@link DataConstants#NOTE}的数据时，更新便签内容 */ private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER = "CREATE TRIGGER update_note_content_on_insert " + @@ -146,7 +159,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Update note's content when data with {@link DataConstants#NOTE} type has changed + * 当类型为{@link DataConstants#NOTE}的数据更新时，更新便签内容 */ private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER = "CREATE TRIGGER update_note_content_on_update " + @@ -159,7 +172,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Update note's content when data with {@link DataConstants#NOTE} type has deleted + * 当类型为{@link DataConstants#NOTE}的数据删除时，清空便签内容 */ private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER = "CREATE TRIGGER update_note_content_on_delete " + @@ -172,7 +185,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Delete datas belong to note which has been deleted + * 当删除便签时，同时删除该便签关联的数据 */ private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER = "CREATE TRIGGER delete_data_on_delete " + @@ -183,7 +196,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Delete notes belong to folder which has been deleted + * 当删除文件夹时，同时删除该文件夹下的所有便签 */ private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER = "CREATE TRIGGER folder_delete_notes_on_delete " + @@ -194,7 +207,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Move notes belong to folder which has been moved to trash folder + * 当文件夹被移入回收站时，将该文件夹下的所有便签也移入回收站 */ private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER = "CREATE TRIGGER folder_move_notes_on_trash " + @@ -206,10 +219,18 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + " END"; + /** + * 构造函数 + * @param context 上下文 + */ public NotesDatabaseHelper(Context context) { super(context, DB_NAME, null, DB_VERSION); } + /** + * 创建便签表 + * @param db 数据库实例 + */ public void createNoteTable(SQLiteDatabase db) { db.execSQL(CREATE_NOTE_TABLE_SQL); reCreateNoteTableTriggers(db); @@ -217,7 +238,12 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { Log.d(TAG, "note table has been created"); } + /** + * 重新创建便签表的触发器 + * @param db 数据库实例 + */ private void reCreateNoteTableTriggers(SQLiteDatabase db) { + // 删除旧触发器 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"); @@ -226,6 +252,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { 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); @@ -235,18 +262,22 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER); } + /** + * 创建系统文件夹 + * @param db 数据库实例 + */ private void createSystemFolder(SQLiteDatabase db) { ContentValues values = new ContentValues(); /** - * call record foler for call notes + * 通话记录文件夹，用于存放通话记录便签 */ values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); /** - * root folder which is default folder + * 根文件夹，默认文件夹 */ values.clear(); values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER); @@ -254,7 +285,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { db.insert(TABLE.NOTE, null, values); /** - * temporary folder which is used for moving note + * 临时文件夹，用于移动便签 */ values.clear(); values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER); @@ -262,7 +293,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { db.insert(TABLE.NOTE, null, values); /** - * create trash folder + * 创建回收站文件夹 */ values.clear(); values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); @@ -270,6 +301,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { db.insert(TABLE.NOTE, null, values); } + /** + * 创建数据表 + * @param db 数据库实例 + */ public void createDataTable(SQLiteDatabase db) { db.execSQL(CREATE_DATA_TABLE_SQL); reCreateDataTableTriggers(db); @@ -277,6 +312,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { Log.d(TAG, "data table has been created"); } + /** + * 重新创建数据表的触发器 + * @param db 数据库实例 + */ 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"); @@ -287,6 +326,11 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER); } + /** + * 获取单例实例 + * @param context 上下文 + * @return NotesDatabaseHelper实例 + */ static synchronized NotesDatabaseHelper getInstance(Context context) { if (mInstance == null) { mInstance = new NotesDatabaseHelper(context); @@ -294,45 +338,64 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { return mInstance; } + /** + * 数据库初次创建时调用 + * @param db 数据库实例 + */ @Override public void onCreate(SQLiteDatabase db) { createNoteTable(db); createDataTable(db); } + /** + * 数据库版本升级时调用 + * @param db 数据库实例 + * @param oldVersion 旧版本号 + * @param newVersion 新版本号 + */ @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { boolean reCreateTriggers = false; boolean skipV2 = false; + // 升级到版本2 if (oldVersion == 1) { upgradeToV2(db); - skipV2 = true; // this upgrade including the upgrade from v2 to v3 + skipV2 = true; // 这次升级包含了从v2到v3的升级 oldVersion++; } + // 升级到版本3 if (oldVersion == 2 && !skipV2) { upgradeToV3(db); reCreateTriggers = true; oldVersion++; } + // 升级到版本4 if (oldVersion == 3) { upgradeToV4(db); oldVersion++; } + // 重新创建触发器 if (reCreateTriggers) { reCreateNoteTableTriggers(db); reCreateDataTableTriggers(db); } + // 检查升级是否成功 if (oldVersion != newVersion) { throw new IllegalStateException("Upgrade notes database to version " + newVersion + "fails"); } } + /** + * 升级到版本2 + * @param db 数据库实例 + */ private void upgradeToV2(SQLiteDatabase db) { db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); @@ -340,23 +403,34 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { createDataTable(db); } + /** + * 升级到版本3 + * @param db 数据库实例 + */ private void upgradeToV3(SQLiteDatabase db) { - // drop unused triggers + // 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"); - // add a column for gtask id + + // 添加Google任务ID列 db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''"); - // add a trash system folder + + // 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); } + /** + * 升级到版本4 + * @param db 数据库实例 + */ 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"); } -} +} \ No newline at end of file diff --git a/src/data/NotesProvider.java b/src/data/NotesProvider.java index edb0a60..072f183 100644 --- a/src/data/NotesProvider.java +++ b/src/data/NotesProvider.java @@ -16,7 +16,6 @@ package net.micode.notes.data; - import android.app.SearchManager; import android.content.ContentProvider; import android.content.ContentUris; @@ -34,22 +33,30 @@ import net.micode.notes.data.Notes.DataColumns; import net.micode.notes.data.Notes.NoteColumns; import net.micode.notes.data.NotesDatabaseHelper.TABLE; - +/** + * NotesProvider类：提供便签数据的内容提供者 + * 负责处理对便签数据的查询、插入、更新和删除操作 + * 支持标准数据操作和搜索建议功能 + */ public class NotesProvider extends ContentProvider { + // URI匹配器，用于识别不同类型的URI请求 private static final UriMatcher mMatcher; + // 数据库帮助类实例 private NotesDatabaseHelper mHelper; + // 日志标签 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; + // URI匹配码常量 + private static final int URI_NOTE = 1; // 匹配所有便签 + private static final int URI_NOTE_ITEM = 2; // 匹配单个便签 + private static final int URI_DATA = 3; // 匹配所有数据 + private static final int URI_DATA_ITEM = 4; // 匹配单个数据 + private static final int URI_SEARCH = 5; // 匹配搜索请求 + private static final int URI_SEARCH_SUGGEST = 6; // 匹配搜索建议请求 + // 初始化URI匹配器 static { mMatcher = new UriMatcher(UriMatcher.NO_MATCH); mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE); @@ -62,8 +69,8 @@ public class NotesProvider extends ContentProvider { } /** - * x'0A' represents the '\n' character in sqlite. For title and content in the search result, - * we will trim '\n' and white space in order to show more information. + * 便签搜索投影：定义搜索结果的列 + * x'0A'表示SQLite中的'\n'字符，为了在搜索结果中显示更多信息，会去除换行符和空白 */ private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + "," + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + "," @@ -73,45 +80,66 @@ public class NotesProvider extends ContentProvider { + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + "," + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA; + // 便签摘要搜索查询SQL 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; + /** + * 初始化内容提供者 + * @return 初始化成功返回true + */ @Override public boolean onCreate() { mHelper = NotesDatabaseHelper.getInstance(getContext()); return true; } + /** + * 查询数据 + * @param uri 查询的URI + * @param projection 需要返回的列 + * @param selection 查询条件 + * @param selectionArgs 查询条件参数 + * @param sortOrder 排序方式 + * @return 返回查询结果的Cursor + */ @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匹配结果执行不同的查询操作 switch (mMatcher.match(uri)) { case URI_NOTE: + // 查询所有便签 c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null, sortOrder); break; case URI_NOTE_ITEM: + // 查询单个便签 id = uri.getPathSegments().get(1); c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs, null, null, sortOrder); break; case URI_DATA: + // 查询所有数据 c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null, sortOrder); break; case URI_DATA_ITEM: + // 查询单个数据 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: + // 处理搜索和搜索建议请求 if (sortOrder != null || projection != null) { throw new IllegalArgumentException( "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query"); @@ -131,6 +159,7 @@ public class NotesProvider extends ContentProvider { } try { + // 执行搜索查询 searchString = String.format("%%%s%%", searchString); c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY, new String[] { searchString }); @@ -141,21 +170,33 @@ public class NotesProvider extends ContentProvider { default: throw new IllegalArgumentException("Unknown URI " + uri); } + + // 设置通知URI，当数据变化时通知内容观察者 if (c != null) { c.setNotificationUri(getContext().getContentResolver(), uri); } return c; } + /** + * 插入数据 + * @param uri 插入的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; + + // 根据URI匹配结果执行不同的插入操作 switch (mMatcher.match(uri)) { case URI_NOTE: + // 插入便签 insertedId = noteId = db.insert(TABLE.NOTE, null, values); break; case URI_DATA: + // 插入数据 if (values.containsKey(DataColumns.NOTE_ID)) { noteId = values.getAsLong(DataColumns.NOTE_ID); } else { @@ -166,13 +207,13 @@ public class NotesProvider extends ContentProvider { default: throw new IllegalArgumentException("Unknown URI " + uri); } - // Notify the note uri + + // 通知数据变化 if (noteId > 0) { getContext().getContentResolver().notifyChange( ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null); } - // Notify the data uri if (dataId > 0) { getContext().getContentResolver().notifyChange( ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null); @@ -181,22 +222,32 @@ public class NotesProvider extends ContentProvider { return ContentUris.withAppendedId(uri, insertedId); } + /** + * 删除数据 + * @param uri 删除的URI + * @param selection 删除条件 + * @param selectionArgs 删除条件参数 + * @return 返回删除的行数 + */ @Override public int delete(Uri uri, String selection, String[] selectionArgs) { int count = 0; String id = null; SQLiteDatabase db = mHelper.getWritableDatabase(); boolean deleteData = false; + + // 根据URI匹配结果执行不同的删除操作 switch (mMatcher.match(uri)) { case URI_NOTE: + // 删除便签 selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 "; count = db.delete(TABLE.NOTE, selection, selectionArgs); break; case URI_NOTE_ITEM: + // 删除单个便签 id = uri.getPathSegments().get(1); /** - * ID that smaller than 0 is system folder which is not allowed to - * trash + * ID小于等于0的是系统文件夹，不允许删除 */ long noteId = Long.valueOf(id); if (noteId <= 0) { @@ -206,10 +257,12 @@ public class NotesProvider extends ContentProvider { NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs); break; case URI_DATA: + // 删除数据 count = db.delete(TABLE.DATA, selection, selectionArgs); deleteData = true; break; case URI_DATA_ITEM: + // 删除单个数据 id = uri.getPathSegments().get(1); count = db.delete(TABLE.DATA, DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs); @@ -218,6 +271,8 @@ public class NotesProvider extends ContentProvider { default: throw new IllegalArgumentException("Unknown URI " + uri); } + + // 通知数据变化 if (count > 0) { if (deleteData) { getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); @@ -227,28 +282,42 @@ public class NotesProvider extends ContentProvider { return count; } + /** + * 更新数据 + * @param uri 更新的URI + * @param values 要更新的数据 + * @param selection 更新条件 + * @param selectionArgs 更新条件参数 + * @return 返回更新的行数 + */ @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; + + // 根据URI匹配结果执行不同的更新操作 switch (mMatcher.match(uri)) { case URI_NOTE: + // 更新便签版本并更新数据 increaseNoteVersion(-1, selection, selectionArgs); count = db.update(TABLE.NOTE, values, selection, selectionArgs); break; case URI_NOTE_ITEM: + // 更新单个便签版本并更新数据 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: + // 更新数据 count = db.update(TABLE.DATA, values, selection, selectionArgs); updateData = true; break; case URI_DATA_ITEM: + // 更新单个数据 id = uri.getPathSegments().get(1); count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs); @@ -258,6 +327,7 @@ public class NotesProvider extends ContentProvider { throw new IllegalArgumentException("Unknown URI " + uri); } + // 通知数据变化 if (count > 0) { if (updateData) { getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); @@ -267,10 +337,21 @@ public class NotesProvider extends ContentProvider { return count; } + /** + * 解析查询条件，用于构建SQL语句 + * @param selection 原始查询条件 + * @return 解析后的查询条件字符串 + */ private String parseSelection(String selection) { return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""); } + /** + * 增加便签版本号 + * @param id 便签ID，如果为-1则更新所有符合条件的便签 + * @param selection 更新条件 + * @param selectionArgs 更新条件参数 + */ private void increaseNoteVersion(long id, String selection, String[] selectionArgs) { StringBuilder sql = new StringBuilder(120); sql.append("UPDATE "); @@ -296,10 +377,14 @@ public class NotesProvider extends ContentProvider { mHelper.getWritableDatabase().execSQL(sql.toString()); } + /** + * 获取URI对应的MIME类型 + * @param uri 请求的URI + * @return MIME类型字符串 + */ @Override public String getType(Uri uri) { // TODO Auto-generated method stub return null; } - -} +} \ No newline at end of file