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Author SHA1 Message Date
wangying 4eeea43439 Merge branch 'wang_branch' into develop
9 months ago
wangying 747d6d5fc9 王滢
9 months ago
4 changed files with 376 additions and 218 deletions
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71
src/data/Contact.java
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@ -1,33 +1,31 @@
/*
* 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;//djfjfjd
import android.database.Cursor;//sjjdj
import android.provider.ContactsContract.Data;//sdsdd
import android.telephony.PhoneNumberUtils;//dsdsdsd
import android.util.Log;
// 导入Android系统相关类
import android.content.Context; // 上下文类，用于访问应用资源和类
import android.database.Cursor; // 数据库查询结果集接口
import android.provider.ContactsContract.Data; // 联系人数据提供者接口
import android.telephony.PhoneNumberUtils; // 电话号码处理工具类
import android.util.Log; // 日志记录类
import java.util.HashMap;
import java.util.HashMap; // 哈希表实现类，用于缓存联系人数据
/**
* 联系人工具类
* 提供从系统联系人中查询电话号码对应联系人姓名的功能
* 并使用内存缓存提高查询效率
*/
public class Contact {
// 联系人缓存，键为电话号码，值为联系人姓名
private static HashMap<String, String> sContactCache;
// 日志标签
private static final String TAG = "Contact";
/**
* 联系人查询SQL选择语句模板
* 使用PHONE_NUMBERS_EQUAL函数比较电话号码
* 只查询MIME类型为电话的联系人数据
* 并且限制在phone_lookup表中存在匹配记录的原始联系人ID范围内
*/
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 "
@ -35,38 +33,55 @@ public class Contact {
+ " FROM phone_lookup"
+ " WHERE min_match = '+')";
/**
* 根据电话号码查询联系人姓名
* @param context 应用上下文
* @param phoneNumber 要查询的电话号码
* @return 对应的联系人姓名，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
if(sContactCache == null) {
sContactCache = new HashMap<String, String>();
}
// 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);
}
// 替换SQL模板中的占位符，生成实际查询条件
String selection = CALLER_ID_SELECTION.replace("+",
PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
// 查询系统联系人数据库
Cursor cursor = context.getContentResolver().query(
Data.CONTENT_URI,
new String [] { Phone.DISPLAY_NAME },
selection,
new String[] { phoneNumber },
null);
Data.CONTENT_URI, // 查询联系人数据URI
new String [] { Phone.DISPLAY_NAME }, // 只查询显示名称列
selection, // 查询条件
new String[] { phoneNumber }, // 查询参数
null); // 不使用排序
// 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) {
// 处理索引越界异常
Log.e(TAG, " Cursor get string error " + e.toString());
return null;
} finally {
// 确保关闭游标，防止资源泄漏
cursor.close();
}
} else {
// 未找到匹配的联系人
Log.d(TAG, "No contact matched with number:" + phoneNumber);
return null;
}
}
}
}

238
src/data/Notes.java
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@ -1,279 +1,285 @@
/*
* 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;
/**
* 便签应用的核心数据结构定义类
* 包含内容提供者的URI、数据表结构、常量值等定义
*/
public class Notes {
// 内容提供者的授权标识
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ID常量
* {@link Notes#ID_ROOT_FOLDER } 是默认根文件夹
* {@link Notes#ID_TEMPARAY_FOLDER } 是临时文件夹，用于存放未分类便签
* {@link Notes#ID_CALL_RECORD_FOLDER} 是通话记录文件夹
* {@link Notes#ID_TRASH_FOLER} 是回收站文件夹
*/
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";
// Intent传递的额外数据键名
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"; // 背景色ID
public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id"; // 桌面小部件ID
public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type"; // 小部件类型
public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id"; // 文件夹ID
public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date"; // 通话日期
public static final int TYPE_WIDGET_INVALIDE = -1;
public static final int TYPE_WIDGET_2X = 0;
public static final int TYPE_WIDGET_4X = 1;
// 桌面小部件类型常量
public static final int TYPE_WIDGET_INVALIDE = -1; // 无效类型
public static final int TYPE_WIDGET_2X = 0; // 2x大小
public static final int TYPE_WIDGET_4X = 1; // 4x大小
/**
* 数据类型常量
*/
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; // 文本便签类型
public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; // 通话记录类型
}
/**
* Uri to query all notes and folders
* 查询所有便签和文件夹的内容URI
*/
public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
/**
* Uri to query data
* 查询数据项的内容URI
*/
public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
/**
* 便签表列定义接口
* 定义了便签和文件夹表的所有列名和数据类型
*/
public interface NoteColumns {
/**
* The unique ID for a row
* <P> Type: INTEGER (long) </P>
* 行的唯一ID
* <P> 类型: INTEGER (long) </P>
*/
public static final String ID = "_id";
/**
* The parent's id for note or folder
* <P> Type: INTEGER (long) </P>
* 便签或文件夹的父ID
* <P> 类型: INTEGER (long) </P>
*/
public static final String PARENT_ID = "parent_id";
/**
* Created data for note or folder
* <P> Type: INTEGER (long) </P>
* 便签或文件夹的创建日期
* <P> 类型: INTEGER (long) </P>
*/
public static final String CREATED_DATE = "created_date";
/**
* Latest modified date
* <P> Type: INTEGER (long) </P>
* 最新修改日期
* <P> 类型: INTEGER (long) </P>
*/
public static final String MODIFIED_DATE = "modified_date";
/**
* Alert date
* <P> Type: INTEGER (long) </P>
* 提醒日期
* <P> 类型: INTEGER (long) </P>
*/
public static final String ALERTED_DATE = "alert_date";
/**
* Folder's name or text content of note
* <P> Type: TEXT </P>
* 文件夹名称或便签内容摘要
* <P> 类型: TEXT </P>
*/
public static final String SNIPPET = "snippet";
/**
* Note's widget id
* <P> Type: INTEGER (long) </P>
* 便签的桌面小部件ID
* <P> 类型: INTEGER (long) </P>
*/
public static final String WIDGET_ID = "widget_id";
/**
* Note's widget type
* <P> Type: INTEGER (long) </P>
* 便签的桌面小部件类型
* <P> 类型: INTEGER (long) </P>
*/
public static final String WIDGET_TYPE = "widget_type";
/**
* Note's background color's id
* <P> Type: INTEGER (long) </P>
* 便签的背景色ID
* <P> 类型: INTEGER (long) </P>
*/
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
* <P> Type: INTEGER </P>
* 指示便签是否有附件
* 对于文本便签，没有附件；对于多媒体便签，至少有一个附件
* <P> 类型: INTEGER </P>
*/
public static final String HAS_ATTACHMENT = "has_attachment";
/**
* Folder's count of notes
* <P> Type: INTEGER (long) </P>
* 文件夹中的便签数量
* <P> 类型: INTEGER (long) </P>
*/
public static final String NOTES_COUNT = "notes_count";
/**
* The file type: folder or note
* <P> Type: INTEGER </P>
* 文件类型：文件夹或便签
* <P> 类型: INTEGER </P>
*/
public static final String TYPE = "type";
/**
* The last sync id
* <P> Type: INTEGER (long) </P>
* 最后同步ID
* <P> 类型: INTEGER (long) </P>
*/
public static final String SYNC_ID = "sync_id";
/**
* Sign to indicate local modified or not
* <P> Type: INTEGER </P>
* 指示本地是否有修改
* <P> 类型: INTEGER </P>
*/
public static final String LOCAL_MODIFIED = "local_modified";
/**
* Original parent id before moving into temporary folder
* <P> Type : INTEGER </P>
* 移入临时文件夹前的原始父ID
* <P> 类型: INTEGER </P>
*/
public static final String ORIGIN_PARENT_ID = "origin_parent_id";
/**
* The gtask id
* <P> Type : TEXT </P>
* Google任务ID
* <P> 类型: TEXT </P>
*/
public static final String GTASK_ID = "gtask_id";
/**
* The version code
* <P> Type : INTEGER (long) </P>
* 版本号
* <P> 类型: INTEGER (long) </P>
*/
public static final String VERSION = "version";
}
/**
* 数据表列定义接口
* 定义了存储便签具体数据的表结构
*/
public interface DataColumns {
/**
* The unique ID for a row
* <P> Type: INTEGER (long) </P>
* 行的唯一ID
* <P> 类型: INTEGER (long) </P>
*/
public static final String ID = "_id";
/**
* The MIME type of the item represented by this row.
* <P> Type: Text </P>
* 此行表示的数据项的MIME类型
* <P> 类型: Text </P>
*/
public static final String MIME_TYPE = "mime_type";
/**
* The reference id to note that this data belongs to
* <P> Type: INTEGER (long) </P>
* 此数据所属便签的引用ID
* <P> 类型: INTEGER (long) </P>
*/
public static final String NOTE_ID = "note_id";
/**
* Created data for note or folder
* <P> Type: INTEGER (long) </P>
* 创建日期
* <P> 类型: INTEGER (long) </P>
*/
public static final String CREATED_DATE = "created_date";
/**
* Latest modified date
* <P> Type: INTEGER (long) </P>
* 最新修改日期
* <P> 类型: INTEGER (long) </P>
*/
public static final String MODIFIED_DATE = "modified_date";
/**
* Data's content
* <P> Type: TEXT </P>
* 数据内容
* <P> 类型: TEXT </P>
*/
public static final String CONTENT = "content";
/**
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for
* integer data type
* <P> Type: INTEGER </P>
* 通用数据列，含义由{@link #MIMETYPE}指定，用于整数类型数据
* <P> 类型: INTEGER </P>
*/
public static final String DATA1 = "data1";
/**
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for
* integer data type
* <P> Type: INTEGER </P>
* 通用数据列，含义由{@link #MIMETYPE}指定，用于整数类型数据
* <P> 类型: INTEGER </P>
*/
public static final String DATA2 = "data2";
/**
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for
* TEXT data type
* <P> Type: TEXT </P>
* 通用数据列，含义由{@link #MIMETYPE}指定，用于文本类型数据
* <P> 类型: TEXT </P>
*/
public static final String DATA3 = "data3";
/**
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for
* TEXT data type
* <P> Type: TEXT </P>
* 通用数据列，含义由{@link #MIMETYPE}指定，用于文本类型数据
* <P> 类型: TEXT </P>
*/
public static final String DATA4 = "data4";
/**
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for
* TEXT data type
* <P> Type: TEXT </P>
* 通用数据列，含义由{@link #MIMETYPE}指定，用于文本类型数据
* <P> 类型: TEXT </P>
*/
public static final String DATA5 = "data5";
}
/**
* 文本便签类型定义
* 继承自DataColumns并定义文本便签特定的字段
*/
public static final class TextNote implements DataColumns {
/**
* Mode to indicate the text in check list mode or not
* <P> Type: Integer 1:check list mode 0: normal mode </P>
* 指示文本是否处于检查列表模式
* <P> 类型: Integer 1:检查列表模式 0:普通模式 </P>
*/
public static final String MODE = DATA1;
public static final int MODE_CHECK_LIST = 1;
public static final int MODE_CHECK_LIST = 1; // 检查列表模式值
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note"; // 目录类型
public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note"; // 项目类型
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");
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note"); // 内容URI
}
/**
* 通话记录类型定义
* 继承自DataColumns并定义通话记录特定的字段
*/
public static final class CallNote implements DataColumns {
/**
* Call date for this record
* <P> Type: INTEGER (long) </P>
* 此记录的通话日期
* <P> 类型: INTEGER (long) </P>
*/
public static final String CALL_DATE = DATA1;
/**
* Phone number for this record
* <P> Type: TEXT </P>
* 此记录的电话号码
* <P> 类型: TEXT </P>
*/
public static final String PHONE_NUMBER = DATA3;
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";
public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note"; // 目录类型
public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note"; // 项目类型
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note"); // 内容URI
}
}
}

149
src/data/NotesDatabaseHelper.java
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@ -1,19 +1,3 @@
/*
* 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;
@ -26,22 +10,35 @@ import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.DataConstants;
import net.micode.notes.data.Notes.NoteColumns;
/**
* 便签应用的SQLite数据库帮助类
* 负责数据库的创建、升级和管理
*/
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
* 包含便签的基本信息列，如ID、父ID、创建日期、修改日期等
*/
private static final String CREATE_NOTE_TABLE_SQL =
"CREATE TABLE " + TABLE.NOTE + "(" +
NoteColumns.ID + " INTEGER PRIMARY KEY," +
@ -63,6 +60,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
")";
/**
* 创建数据表的SQL语句
* 包含便签详细数据的列，如MIME类型、内容、关联便签ID等
*/
private static final String CREATE_DATA_TABLE_SQL =
"CREATE TABLE " + TABLE.DATA + "(" +
DataColumns.ID + " INTEGER PRIMARY KEY," +
@ -78,12 +79,16 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
")";
/**
* 创建数据表的note_id索引SQL语句
* 加速通过便签ID查询数据的操作
*/
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
* 触发器：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 +100,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Decrease folder's note count when move note from folder
* 触发器：当便签移出文件夹时减少原文件夹的便签计数
*/
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER decrease_folder_count_on_update " +
@ -108,7 +113,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Increase folder's note count when insert new note to the folder
* 触发器：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 +125,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Decrease folder's note count when delete note from the folder
* 触发器：当从文件夹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 +138,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Update note's content when insert data with type {@link DataConstants#NOTE}
* 触发器：当插入文本便签数据时更新便签的摘要内容
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
"CREATE TRIGGER update_note_content_on_insert " +
@ -146,7 +151,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Update note's content when data with {@link DataConstants#NOTE} type has changed
* 触发器：当更新文本便签数据时更新便签的摘要内容
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER update_note_content_on_update " +
@ -159,7 +164,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Update note's content when data with {@link DataConstants#NOTE} type has deleted
* 触发器：当删除文本便签数据时清空便签的摘要内容
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
"CREATE TRIGGER update_note_content_on_delete " +
@ -172,7 +177,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Delete datas belong to note which has been deleted
* 触发器：当删除便签时级联删除其关联的数据
*/
private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
"CREATE TRIGGER delete_data_on_delete " +
@ -183,7 +188,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Delete notes belong to folder which has been deleted
* 触发器：当删除文件夹时级联删除其包含的便签
*/
private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
"CREATE TRIGGER folder_delete_notes_on_delete " +
@ -194,7 +199,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Move notes belong to folder which has been moved to trash folder
* 触发器：当文件夹被移入回收站时，将其包含的便签也移入回收站
*/
private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
"CREATE TRIGGER folder_move_notes_on_trash " +
@ -206,10 +211,18 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END";
/**
* 构造函数
* @param context 应用上下文
*/
public NotesDatabaseHelper(Context context) {
super(context, DB_NAME, null, DB_VERSION);
}
/**
* 创建便签表
* @param db SQLite数据库实例
*/
public void createNoteTable(SQLiteDatabase db) {
db.execSQL(CREATE_NOTE_TABLE_SQL);
reCreateNoteTableTriggers(db);
@ -217,6 +230,11 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
Log.d(TAG, "note table has been created");
}
/**
* 重新创建便签表的触发器
* 先删除旧触发器，再创建新触发器
* @param db SQLite数据库实例
*/
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");
@ -235,18 +253,23 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
}
/**
* 创建系统文件夹
* 包括通话记录文件夹、根文件夹、临时文件夹和回收站文件夹
* @param db SQLite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，用于存储通话便签
*/
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 +277,7 @@ 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 +285,7 @@ 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 +293,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.insert(TABLE.NOTE, null, values);
}
/**
* 创建数据表
* @param db SQLite数据库实例
*/
public void createDataTable(SQLiteDatabase db) {
db.execSQL(CREATE_DATA_TABLE_SQL);
reCreateDataTableTriggers(db);
@ -277,6 +304,11 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
Log.d(TAG, "data table has been created");
}
/**
* 重新创建数据表的触发器
* 先删除旧触发器，再创建新触发器
* @param db SQLite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 +319,11 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
}
/**
* 获取单例实例
* @param context 应用上下文
* @return NotesDatabaseHelper实例
*/
static synchronized NotesDatabaseHelper getInstance(Context context) {
if (mInstance == null) {
mInstance = new NotesDatabaseHelper(context);
@ -294,45 +331,67 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
return mInstance;
}
/**
* 数据库创建回调
* 当数据库首次创建时调用，创建表结构和系统文件夹
* @param db SQLite数据库实例
*/
@Override
public void onCreate(SQLiteDatabase db) {
createNoteTable(db);
createDataTable(db);
}
/**
* 数据库升级回调
* 当数据库版本发生变化时调用，执行相应的升级操作
* @param db SQLite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;
// 从版本1升级到版本2
if (oldVersion == 1) {
upgradeToV2(db);
skipV2 = true; // this upgrade including the upgrade from v2 to v3
skipV2 = true; // 此升级包含从v2到v3的升级
oldVersion++;
}
// 从版本2升级到版本3
if (oldVersion == 2 && !skipV2) {
upgradeToV3(db);
reCreateTriggers = true;
oldVersion++;
}
// 从版本3升级到版本4
if (oldVersion == 3) {
upgradeToV4(db);
oldVersion++;
}
// 如果触发器需要重新创建
if (reCreateTriggers) {
reCreateNoteTableTriggers(db);
reCreateDataTableTriggers(db);
}
// 确保升级到目标版本
if (oldVersion != newVersion) {
throw new IllegalStateException("Upgrade notes database to version " + newVersion
+ "fails");
}
}
/**
* 升级到版本2
* 删除旧表，重新创建表结构
* @param db SQLite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 +399,35 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
createDataTable(db);
}
/**
* 升级到版本3
* 删除无用触发器，添加Google任务ID列，创建回收站文件夹
* @param db SQLite数据库实例
*/
private void upgradeToV3(SQLiteDatabase db) {
// drop unused triggers
// 删除无用触发器
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
* 添加版本号列
* @param db SQLite数据库实例
*/
private void upgradeToV4(SQLiteDatabase db) {
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
+ " INTEGER NOT NULL DEFAULT 0");
}
}
}

136
src/data/NotesProvider.java
Unescape View File

@ -1,22 +1,5 @@
/*
* 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;
@ -34,23 +17,30 @@ import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.data.NotesDatabaseHelper.TABLE;
/**
* 便签应用的内容提供者类
* 负责处理外部应用对便签数据的访问请求
*/
public class NotesProvider extends ContentProvider {
// URI匹配器，用于识别不同的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; // 便签集合URI
private static final int URI_NOTE_ITEM = 2; // 单个便签URI
private static final int URI_DATA = 3; // 数据集合URI
private static final int URI_DATA_ITEM = 4; // 单个数据URI
private static final int URI_SEARCH = 5; // 搜索URI
private static final int URI_SEARCH_SUGGEST = 6; // 搜索建议URI
static {
// 初始化URI匹配器
mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM);
@ -62,8 +52,9 @@ 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
* 定义了搜索结果的列映射关系，包括ID、标题、内容等
* x'0A'代表SQLite中的换行符，这里替换为空格以显示更完整的信息
*/
private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + ","
+ NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
@ -73,18 +64,37 @@ public class NotesProvider extends ContentProvider {
+ "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
+ "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
/**
* 便签搜索查询SQL语句
* 搜索便签摘要内容，并排除回收站中的便签
*/
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;
/**
* 内容提供者初始化
* 获取数据库帮助类实例
* @return 初始化成功返回true
*/
@Override
public boolean onCreate() {
mHelper = NotesDatabaseHelper.getInstance(getContext());
return true;
}
/**
* 查询数据
* 根据不同的URI类型执行相应的查询操作
* @param uri 查询的URI
* @param projection 需要返回的列
* @param selection 查询条件
* @param selectionArgs 查询参数
* @param sortOrder 排序方式
* @return 查询结果Cursor
*/
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) {
@ -93,25 +103,30 @@ public class NotesProvider extends ContentProvider {
String id = null;
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:
// 搜索功能实现
if (sortOrder != null || projection != null) {
throw new IllegalArgumentException(
"do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
@ -131,6 +146,7 @@ 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 });
@ -142,20 +158,30 @@ public class NotesProvider extends ContentProvider {
throw new IllegalArgumentException("Unknown URI " + uri);
}
if (c != null) {
// 设置通知URI，当数据变化时通知观察者
c.setNotificationUri(getContext().getContentResolver(), uri);
}
return c;
}
/**
* 插入数据
* 根据URI类型插入便签或数据
* @param uri 插入的URI
* @param values 要插入的数据
* @return 插入后的URI
*/
@Override
public Uri insert(Uri uri, ContentValues values) {
SQLiteDatabase db = mHelper.getWritableDatabase();
long dataId = 0, noteId = 0, insertedId = 0;
switch (mMatcher.match(uri)) {
case URI_NOTE:
// 插入便签
insertedId = noteId = db.insert(TABLE.NOTE, null, values);
break;
case URI_DATA:
// 插入数据，需关联便签ID
if (values.containsKey(DataColumns.NOTE_ID)) {
noteId = values.getAsLong(DataColumns.NOTE_ID);
} else {
@ -166,13 +192,12 @@ 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);
@ -181,6 +206,14 @@ public class NotesProvider extends ContentProvider {
return ContentUris.withAppendedId(uri, insertedId);
}
/**
* 删除数据
* 根据URI类型删除便签或数据
* @param uri 删除的URI
* @param selection 删除条件
* @param selectionArgs 删除参数
* @return 删除的行数
*/
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
int count = 0;
@ -189,15 +222,13 @@ public class NotesProvider extends ContentProvider {
boolean deleteData = false;
switch (mMatcher.match(uri)) {
case URI_NOTE:
// 删除便签集合
selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
count = db.delete(TABLE.NOTE, selection, selectionArgs);
break;
case URI_NOTE_ITEM:
// 删除单个便签，不允许删除系统文件夹
id = uri.getPathSegments().get(1);
/**
* ID that smaller than 0 is system folder which is not allowed to
* trash
*/
long noteId = Long.valueOf(id);
if (noteId <= 0) {
break;
@ -206,10 +237,12 @@ public class NotesProvider extends ContentProvider {
NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
break;
case URI_DATA:
// 删除数据集合
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 +251,7 @@ 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);
@ -227,6 +261,15 @@ public class NotesProvider extends ContentProvider {
return count;
}
/**
* 更新数据
* 根据URI类型更新便签或数据
* @param uri 更新的URI
* @param values 更新的数据
* @param selection 更新条件
* @param selectionArgs 更新参数
* @return 更新的行数
*/
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
int count = 0;
@ -235,20 +278,24 @@ public class NotesProvider extends ContentProvider {
boolean updateData = false;
switch (mMatcher.match(uri)) {
case URI_NOTE:
// 更新便签集合，增加版本号
increaseNoteVersion(-1, selection, selectionArgs);
count = db.update(TABLE.NOTE, values, selection, selectionArgs);
break;
case URI_NOTE_ITEM:
// 更新单个便签，增加版本号
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:
// 更新数据集合
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 +305,7 @@ 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 +315,23 @@ public class NotesProvider extends ContentProvider {
return count;
}
/**
* 解析查询条件
* 将额外的查询条件添加到原有条件中
* @param selection 原始查询条件
* @return 解析后的查询条件
*/
private String parseSelection(String selection) {
return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
}
/**
* 增加便签版本号
* 当便签更新时，版本号自动增加
* @param id 便签ID，-1表示全部便签
* @param selection 更新条件
* @param selectionArgs 更新参数
*/
private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
StringBuilder sql = new StringBuilder(120);
sql.append("UPDATE ");
@ -296,10 +357,15 @@ public class NotesProvider extends ContentProvider {
mHelper.getWritableDatabase().execSQL(sql.toString());
}
/**
* 获取URI的MIME类型
* 目前未实现
* @param uri 请求的URI
* @return MIME类型
*/
@Override
public String getType(Uri uri) {
// TODO Auto-generated method stub
return null;
}
}
}
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