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data中的6个代码修改迁移完毕--文渤乔

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src
jacky-qiao 8 months ago
parent c588c8c6b2
commit ca7c76df15
4 changed files with 409 additions and 343 deletions
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23
Notes-master/src/net/micode/notes/data/Contact.java
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@ -26,9 +26,12 @@ import android.util.Log;
import java.util.HashMap; import java.util.HashMap;
public class Contact { public class Contact {
// 保存联系人名与电话号码映射的缓存
private static HashMap<String, String> sContactCache; private static HashMap<String, String> sContactCache;
// 日志标记
private static final String TAG = "Contact"; private static final String TAG = "Contact";
// 查询联系人所用的选择条件
private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
+ ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'" + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
+ " AND " + Data.RAW_CONTACT_ID + " IN " + " AND " + Data.RAW_CONTACT_ID + " IN "
@ -36,36 +39,54 @@ public class Contact {
+ " FROM phone_lookup" + " FROM phone_lookup"
+ " WHERE min_match = '+')"; + " WHERE min_match = '+')";
/**
* 根据电话号码获取联系人的姓名
*
* @param context 应用的上下文
* @param phoneNumber 要查询的电话号码
* @return 联系人的姓名，如果没有找到则返回null
*/
public static String getContact(Context context, String phoneNumber) { public static String getContact(Context context, String phoneNumber) {
// 初始化联系人缓存
if(sContactCache == null) { if(sContactCache == null) {
sContactCache = new HashMap<String, String>(); sContactCache = new HashMap<String, String>();
} }
// 如果缓存中已经存在该电话号码的联系人名，直接返回
if(sContactCache.containsKey(phoneNumber)) { if(sContactCache.containsKey(phoneNumber)) {
return sContactCache.get(phoneNumber); return sContactCache.get(phoneNumber);
} }
// 替换选择条件中的占位符
String selection = CALLER_ID_SELECTION.replace("+", String selection = CALLER_ID_SELECTION.replace("+",
PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)); PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
// 执行查询
Cursor cursor = context.getContentResolver().query( Cursor cursor = context.getContentResolver().query(
Data.CONTENT_URI, Data.CONTENT_URI,
new String [] { Phone.DISPLAY_NAME }, new String [] { Phone.DISPLAY_NAME }, // 查询显示名称
selection, selection,
new String[] { phoneNumber }, new String[] { phoneNumber },
null); null);
// 如果查询结果不为空且移动到结果集的第一行
if (cursor != null && cursor.moveToFirst()) { if (cursor != null && cursor.moveToFirst()) {
try { try {
// 获取联系人姓名
String name = cursor.getString(0); String name = cursor.getString(0);
// 将联系人姓名缓存起来
sContactCache.put(phoneNumber, name); sContactCache.put(phoneNumber, name);
return name; return name;
} catch (IndexOutOfBoundsException e) { } catch (IndexOutOfBoundsException e) {
// 捕获索引越界异常，记录错误日志
Log.e(TAG, " Cursor get string error " + e.toString()); Log.e(TAG, " Cursor get string error " + e.toString());
return null; return null;
} finally { } finally {
// 关闭cursor，释放资源
cursor.close(); cursor.close();
} }
} else { } else {
// 如果没有找到匹配的联系人，记录日志
Log.d(TAG, "No contact matched with number:" + phoneNumber); Log.d(TAG, "No contact matched with number:" + phoneNumber);
return null; return null;
} }

226
Notes-master/src/net/micode/notes/data/Notes.java
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@ -1,279 +1,283 @@
/* /*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * 依据 Apache 许可证第2.0版（“许可证”）授权；
* you may not use this file except in compliance with the License. * 您不得在未遵守许可证的情况下使用本文件。
* You may obtain a copy of the License at * 您可以在以下网址获取许可证副本：
* *
* http://www.apache.org/licenses/LICENSE-2.0 * http://www.apache.org/licenses/LICENSE-2.0
* *
* Unless required by applicable law or agreed to in writing, software * 除非适用法律要求或书面同意，依据许可证分发的软件
* distributed under the License is distributed on an "AS IS" BASIS, * 是按照 "按原样" 基础提供的，
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * 不提供任何形式的保证或条件，无论明确或隐含。
* See the License for the specific language governing permissions and * 请参阅许可证以获取特定语言涉及的权限和限制。
* limitations under the License.
*/ */
package net.micode.notes.data; package net.micode.notes.data;
import android.net.Uri; import android.net.Uri;
public class Notes { public class Notes {
// Notes类的授权标识符
public static final String AUTHORITY = "micode_notes"; public static final String AUTHORITY = "micode_notes";
// 日志标签
public static final String TAG = "Notes"; public static final String TAG = "Notes";
public static final int TYPE_NOTE = 0;
public static final int TYPE_FOLDER = 1; // 笔记类型
public static final int TYPE_SYSTEM = 2; public static final int TYPE_NOTE = 0; // 笔记类型
public static final int TYPE_FOLDER = 1; // 文件夹类型
public static final int TYPE_SYSTEM = 2; // 系统类型
/** /**
* Following IDs are system folders' identifiers * 以下 IDs 是系统文件夹的标识符
* {@link Notes#ID_ROOT_FOLDER } is default folder * {@link Notes#ID_ROOT_FOLDER } 是默认文件夹
* {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder * {@link Notes#ID_TEMPARAY_FOLDER } 是放置无文件夹笔记的临时文件夹
* {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records * {@link Notes#ID_CALL_RECORD_FOLDER} 是存储通话记录的文件夹
*/ */
public static final int ID_ROOT_FOLDER = 0; public static final int ID_ROOT_FOLDER = 0; // 根文件夹
public static final int ID_TEMPARAY_FOLDER = -1; public static final int ID_TEMPARAY_FOLDER = -1; // 临时文件夹
public static final int ID_CALL_RECORD_FOLDER = -2; public static final int ID_CALL_RECORD_FOLDER = -2; // 通话记录文件夹
public static final int ID_TRASH_FOLER = -3; public static final int ID_TRASH_FOLER = -3; // 垃圾箱文件夹
public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date"; // Intent Extra Strings
public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id"; public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date"; // 提醒日期
public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id"; 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_TYPE = "net.micode.notes.widget_type"; public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id"; // 小部件ID
public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_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_CALL_DATE = "net.micode.notes.call_date"; 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; // 小部件类型
public static final int TYPE_WIDGET_4X = 1; public static final int TYPE_WIDGET_INVALIDE = -1; // 无效的小部件类型
public static final int TYPE_WIDGET_2X = 0; // 2x小部件类型
public static final int TYPE_WIDGET_4X = 1; // 4x小部件类型
public static class DataConstants { public static class DataConstants {
public static final String NOTE = TextNote.CONTENT_ITEM_TYPE; public static final String NOTE = TextNote.CONTENT_ITEM_TYPE; // 笔记内容类型
public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; // 通话记录内容类型
} }
/** /**
* Uri to query all notes and folders * 查询所有笔记和文件夹的 URI
*/ */
public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note"); 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"); public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
public interface NoteColumns { public interface NoteColumns {
/** /**
* The unique ID for a row * 行的独特 ID
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String ID = "_id"; public static final String ID = "_id";
/** /**
* The parent's id for note or folder * 笔记或文件夹的父 ID
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String PARENT_ID = "parent_id"; public static final String PARENT_ID = "parent_id";
/** /**
* Created data for note or folder * 创建日期用于笔记或文件夹
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String CREATED_DATE = "created_date"; public static final String CREATED_DATE = "created_date";
/** /**
* Latest modified date * 最新修改日期
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String MODIFIED_DATE = "modified_date"; public static final String MODIFIED_DATE = "modified_date";
/** /**
* Alert date * 提醒日期
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String ALERTED_DATE = "alert_date"; public static final String ALERTED_DATE = "alert_date";
/** /**
* Folder's name or text content of note * 文件夹的名称或笔记的文本内容
* <P> Type: TEXT </P> * <P> 类型: TEXT </P>
*/ */
public static final String SNIPPET = "snippet"; public static final String SNIPPET = "snippet";
/** /**
* Note's widget id * 笔记的小部件 ID
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String WIDGET_ID = "widget_id"; public static final String WIDGET_ID = "widget_id";
/** /**
* Note's widget type * 笔记的小部件类型
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String WIDGET_TYPE = "widget_type"; public static final String WIDGET_TYPE = "widget_type";
/** /**
* Note's background color's id * 笔记的背景颜色的 ID
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String BG_COLOR_ID = "bg_color_id"; public static final String BG_COLOR_ID = "bg_color_id";
/** /**
* For text note, it doesn't has attachment, for multi-media * 对于文本笔记，没有附件；对于多媒体笔记，至少有一个附件
* note, it has at least one attachment * <P> 类型: INTEGER </P>
* <P> Type: INTEGER </P>
*/ */
public static final String HAS_ATTACHMENT = "has_attachment"; public static final String HAS_ATTACHMENT = "has_attachment";
/** /**
* Folder's count of notes * 文件夹中笔记的数量
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String NOTES_COUNT = "notes_count"; public static final String NOTES_COUNT = "notes_count";
/** /**
* The file type: folder or note * 文件类型：文件夹或笔记
* <P> Type: INTEGER </P> * <P> 类型: INTEGER </P>
*/ */
public static final String TYPE = "type"; public static final String TYPE = "type";
/** /**
* The last sync id * 最后同步 ID
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String SYNC_ID = "sync_id"; public static final String SYNC_ID = "sync_id";
/** /**
* Sign to indicate local modified or not * 标记以指示本地是否已修改
* <P> Type: INTEGER </P> * <P> 类型: INTEGER </P>
*/ */
public static final String LOCAL_MODIFIED = "local_modified"; public static final String LOCAL_MODIFIED = "local_modified";
/** /**
* Original parent id before moving into temporary folder * 移动到临时文件夹之前的原始父 ID
* <P> Type : INTEGER </P> * <P> 类型 : INTEGER </P>
*/ */
public static final String ORIGIN_PARENT_ID = "origin_parent_id"; public static final String ORIGIN_PARENT_ID = "origin_parent_id";
/** /**
* The gtask id * gtask ID
* <P> Type : TEXT </P> * <P> 类型 : TEXT </P>
*/ */
public static final String GTASK_ID = "gtask_id"; public static final String GTASK_ID = "gtask_id";
/** /**
* The version code * 版本代码
* <P> Type : INTEGER (long) </P> * <P> 类型 : INTEGER (long) </P>
*/ */
public static final String VERSION = "version"; public static final String VERSION = "version";
} }
public interface DataColumns { public interface DataColumns {
/** /**
* The unique ID for a row * 行的独特 ID
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String ID = "_id"; public static final String ID = "_id";
/** /**
* The MIME type of the item represented by this row. * 此行所表示项目的 MIME 类型。
* <P> Type: Text </P> * <P> 类型: Text </P>
*/ */
public static final String MIME_TYPE = "mime_type"; public static final String MIME_TYPE = "mime_type";
/** /**
* The reference id to note that this data belongs to * 该数据所属笔记的参考 ID
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String NOTE_ID = "note_id"; public static final String NOTE_ID = "note_id";
/** /**
* Created data for note or folder * 创建日期用于笔记或文件夹
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String CREATED_DATE = "created_date"; public static final String CREATED_DATE = "created_date";
/** /**
* Latest modified date * 最新修改日期
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String MODIFIED_DATE = "modified_date"; public static final String MODIFIED_DATE = "modified_date";
/** /**
* Data's content * 数据内容
* <P> Type: TEXT </P> * <P> 类型: TEXT </P>
*/ */
public static final String CONTENT = "content"; public static final String CONTENT = "content";
/** /**
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for * 通用数据列，具体含义取决于 {@link #MIMETYPE}，用于
* integer data type * 整数数据类型
* <P> Type: INTEGER </P> * <P> 类型: INTEGER </P>
*/ */
public static final String DATA1 = "data1"; public static final String DATA1 = "data1";
/** /**
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for * 通用数据列，具体含义取决于 {@link #MIMETYPE}，用于
* integer data type * 整数数据类型
* <P> Type: INTEGER </P> * <P> 类型: INTEGER </P>
*/ */
public static final String DATA2 = "data2"; public static final String DATA2 = "data2";
/** /**
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for * 通用数据列，具体含义取决于 {@link #MIMETYPE}，用于
* TEXT data type * TEXT 数据类型
* <P> Type: TEXT </P> * <P> 类型: TEXT </P>
*/ */
public static final String DATA3 = "data3"; public static final String DATA3 = "data3";
/** /**
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for * 通用数据列，具体含义取决于 {@link #MIMETYPE}，用于
* TEXT data type * TEXT 数据类型
* <P> Type: TEXT </P> * <P> 类型: TEXT </P>
*/ */
public static final String DATA4 = "data4"; public static final String DATA4 = "data4";
/** /**
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for * 通用数据列，具体含义取决于 {@link #MIMETYPE}，用于
* TEXT data type * TEXT 数据类型
* <P> Type: TEXT </P> * <P> 类型: TEXT </P>
*/ */
public static final String DATA5 = "data5"; public static final String DATA5 = "data5";
} }
public static final class TextNote implements DataColumns { public static final class TextNote implements DataColumns {
/** /**
* Mode to indicate the text in check list mode or not * 指示文本处于检查列表模式还是普通模式
* <P> Type: Integer 1:check list mode 0: normal mode </P> * <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 String MODE = DATA1;
public static final int MODE_CHECK_LIST = 1; public static final int MODE_CHECK_LIST = 1; // 检查列表模式的常量
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note"; public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note"; // 笔记内容类型
public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note"; public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note"; // 单个笔记项内容类型
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note"); public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note"); // 笔记的内容URI
} }
public static final class CallNote implements DataColumns { public static final class CallNote implements DataColumns {
/** /**
* Call date for this record * 此记录的通话日期
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String CALL_DATE = DATA1; public static final String CALL_DATE = DATA1;
/** /**
* Phone number for this record * 此记录的电话号码
* <P> Type: TEXT </P> * <P> 类型: TEXT </P>
*/ */
public static final String PHONE_NUMBER = DATA3; public static final String PHONE_NUMBER = DATA3;
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note"; public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note"; // 通话记录内容类型
public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note"; public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note"; // 单个通话记录项内容类型
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note"); public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note"); // 通话记录的内容URI
} }
} }

289
Notes-master/src/net/micode/notes/data/NotesDatabaseHelper.java
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@ -1,92 +1,99 @@
/* /*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * 本文件采用Apache 2.0许可协议进行许可。
* you may not use this file except in compliance with the License. * 未经许可，您不得使用本文件。您可以在以下地址获取许可证：
* You may obtain a copy of the License at
* *
* http://www.apache.org/licenses/LICENSE-2.0 * http://www.apache.org/licenses/LICENSE-2.0
* *
* Unless required by applicable law or agreed to in writing, software * 除非适用法律另有规定或书面协议另有约定，否则根据许可证分发的软件是按"原样"提供的，
* distributed under the License is distributed on an "AS IS" BASIS, * 不附带任何明示或暗示的担保或条件。有关许可证下的特定语言条款和限制，请参阅许可证。
* 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.
*/ */
// 指定包名
package net.micode.notes.data; package net.micode.notes.data;
import android.content.ContentValues; // 导入必要的类
import android.content.Context; import android.content.ContentValues; // 用于数据库内容的存储
import android.database.sqlite.SQLiteDatabase; import android.content.Context; // 上下文类
import android.database.sqlite.SQLiteOpenHelper; import android.database.sqlite.SQLiteDatabase; // SQLite数据库类
import android.util.Log; import android.database.sqlite.SQLiteOpenHelper; // SQLite数据库帮助类
import android.util.Log; // 日志类
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.DataConstants;
import net.micode.notes.data.Notes.NoteColumns;
// 导入自定义数据列和常量
import net.micode.notes.data.Notes.DataColumns; // 数据列模型
import net.micode.notes.data.Notes.DataConstants; // 数据常量
import net.micode.notes.data.Notes.NoteColumns; // 笔记列模型
// 创建NotesDatabaseHelper类，继承自SQLiteOpenHelper
public class NotesDatabaseHelper extends SQLiteOpenHelper { public class NotesDatabaseHelper extends SQLiteOpenHelper {
// 数据库名称
private static final String DB_NAME = "note.db"; private static final String DB_NAME = "note.db";
// 数据库版本号
private static final int DB_VERSION = 4; private static final int DB_VERSION = 4;
// 定义表名的接口
public interface TABLE { public interface TABLE {
// 笔记表的名称
public static final String NOTE = "note"; public static final String NOTE = "note";
// 数据表的名称
public static final String DATA = "data"; public static final String DATA = "data";
} }
// 日志标签
private static final String TAG = "NotesDatabaseHelper"; private static final String TAG = "NotesDatabaseHelper";
// 单例实例
private static NotesDatabaseHelper mInstance; private static NotesDatabaseHelper mInstance;
// 创建笔记表的SQL语句
private static final String CREATE_NOTE_TABLE_SQL = private static final String CREATE_NOTE_TABLE_SQL =
"CREATE TABLE " + TABLE.NOTE + "(" + "CREATE TABLE " + TABLE.NOTE + "(" +
NoteColumns.ID + " INTEGER PRIMARY KEY," + NoteColumns.ID + " INTEGER PRIMARY KEY," + // 笔记ID，主键
NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 父级ID
NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + // 提醒日期
NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," + 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)," + NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 创建日期
NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," + // 是否有附件
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改日期
NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + // 笔记数量
NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + // 笔记摘要
NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + // 笔记类型
NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," + // 小部件ID
NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," + NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," + // 小部件类型
NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + // 同步ID
NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," + // 本地修改标志
NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 原始父级ID
NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + // GTASK ID
NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + 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 = private static final String CREATE_DATA_TABLE_SQL =
"CREATE TABLE " + TABLE.DATA + "(" + "CREATE TABLE " + TABLE.DATA + "(" +
DataColumns.ID + " INTEGER PRIMARY KEY," + DataColumns.ID + " INTEGER PRIMARY KEY," + // 数据ID，主键
DataColumns.MIME_TYPE + " TEXT NOT NULL," + DataColumns.MIME_TYPE + " TEXT NOT NULL," + // MIME类型
DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + // 关联的笔记ID
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + 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)," + NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 修改日期
DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," + DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," + // 内容
DataColumns.DATA1 + " INTEGER," + DataColumns.DATA1 + " INTEGER," + // 数据字段1
DataColumns.DATA2 + " INTEGER," + DataColumns.DATA2 + " INTEGER," + // 数据字段2
DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + // 数据字段3
DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + // 数据字段4
DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + // 数据字段5
")"; ")";
// 创建数据表中NOTE_ID字段的索引
private static final String CREATE_DATA_NOTE_ID_INDEX_SQL = private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
"CREATE INDEX IF NOT EXISTS note_id_index ON " + "CREATE INDEX IF NOT EXISTS note_id_index ON " +
TABLE.DATA + "(" + DataColumns.NOTE_ID + ");"; TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
/** // 当更新笔记时增加文件夹的笔记计数的触发器
* Increase folder's note count when move note to the folder
*/
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER increase_folder_count_on_update "+ "CREATE TRIGGER increase_folder_count_on_update "+
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE + " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
" BEGIN " + " BEGIN " +
" UPDATE " + TABLE.NOTE + " UPDATE " + TABLE.NOTE +
@ -94,9 +101,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END"; " END";
/** // 当从文件夹中移动笔记时减少文件夹的笔记计数的触发器
* Decrease folder's note count when move note from folder
*/
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER decrease_folder_count_on_update " + "CREATE TRIGGER decrease_folder_count_on_update " +
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE + " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
@ -107,9 +112,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" + " AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
" END"; " END";
/** // 当在文件夹中插入新笔记时增加文件夹的笔记计数的触发器
* Increase folder's note count when insert new note to the folder
*/
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER = private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
"CREATE TRIGGER increase_folder_count_on_insert " + "CREATE TRIGGER increase_folder_count_on_insert " +
" AFTER INSERT ON " + TABLE.NOTE + " AFTER INSERT ON " + TABLE.NOTE +
@ -119,9 +122,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END"; " END";
/** // 当从文件夹中删除笔记时减少文件夹的笔记计数的触发器
* Decrease folder's note count when delete note from the folder
*/
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER = private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
"CREATE TRIGGER decrease_folder_count_on_delete " + "CREATE TRIGGER decrease_folder_count_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE + " AFTER DELETE ON " + TABLE.NOTE +
@ -132,9 +133,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" AND " + NoteColumns.NOTES_COUNT + ">0;" + " AND " + NoteColumns.NOTES_COUNT + ">0;" +
" END"; " END";
/** // 在插入类型为NOTE的数据时更新笔记内容的触发器
* Update note's content when insert data with type {@link DataConstants#NOTE}
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER = private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
"CREATE TRIGGER update_note_content_on_insert " + "CREATE TRIGGER update_note_content_on_insert " +
" AFTER INSERT ON " + TABLE.DATA + " AFTER INSERT ON " + TABLE.DATA +
@ -145,9 +144,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" END"; " END";
/** // 当类型为NOTE的数据发生变化时更新笔记内容的触发器
* Update note's content when data with {@link DataConstants#NOTE} type has changed
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER = private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER update_note_content_on_update " + "CREATE TRIGGER update_note_content_on_update " +
" AFTER UPDATE ON " + TABLE.DATA + " AFTER UPDATE ON " + TABLE.DATA +
@ -158,9 +155,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" END"; " END";
/** // 当类型为NOTE的数据被删除时更新笔记内容的触发器
* Update note's content when data with {@link DataConstants#NOTE} type has deleted
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER = private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
"CREATE TRIGGER update_note_content_on_delete " + "CREATE TRIGGER update_note_content_on_delete " +
" AFTER delete ON " + TABLE.DATA + " AFTER delete ON " + TABLE.DATA +
@ -171,9 +166,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" + " WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
" END"; " END";
/** // 删除已删除笔记的所有数据的触发器
* Delete datas belong to note which has been deleted
*/
private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER = private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
"CREATE TRIGGER delete_data_on_delete " + "CREATE TRIGGER delete_data_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE + " AFTER DELETE ON " + TABLE.NOTE +
@ -182,9 +175,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" + " WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
" END"; " END";
/** // 删除已删除文件夹中的笔记的触发器
* Delete notes belong to folder which has been deleted
*/
private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER = private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
"CREATE TRIGGER folder_delete_notes_on_delete " + "CREATE TRIGGER folder_delete_notes_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE + " AFTER DELETE ON " + TABLE.NOTE +
@ -193,9 +184,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END"; " END";
/** // 当文件夹被移动到垃圾桶时移动文件夹中的笔记的触发器
* Move notes belong to folder which has been moved to trash folder
*/
private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER = private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
"CREATE TRIGGER folder_move_notes_on_trash " + "CREATE TRIGGER folder_move_notes_on_trash " +
" AFTER UPDATE ON " + TABLE.NOTE + " AFTER UPDATE ON " + TABLE.NOTE +
@ -206,26 +195,30 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END"; " END";
// 构造函数，接受上下文参数
public NotesDatabaseHelper(Context context) { public NotesDatabaseHelper(Context context) {
super(context, DB_NAME, null, DB_VERSION); super(context, DB_NAME, null, DB_VERSION); // 调用父类构造函数
} }
// 创建笔记表
public void createNoteTable(SQLiteDatabase db) { public void createNoteTable(SQLiteDatabase db) {
db.execSQL(CREATE_NOTE_TABLE_SQL); db.execSQL(CREATE_NOTE_TABLE_SQL); // 执行创建表的SQL语句
reCreateNoteTableTriggers(db); reCreateNoteTableTriggers(db); // 重新创建触发器
createSystemFolder(db); createSystemFolder(db); // 创建系统文件夹
Log.d(TAG, "note table has been created"); Log.d(TAG, "note table has been created"); // 日志输出
} }
// 重新创建笔记表的所有触发器
private void reCreateNoteTableTriggers(SQLiteDatabase db) { private void reCreateNoteTableTriggers(SQLiteDatabase db) {
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update"); db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update"); // 删除触发器
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update"); db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update"); // 删除触发器
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete"); db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete"); // 删除触发器
db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete"); db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete"); // 删除触发器
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert"); db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert"); // 删除触发器
db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete"); db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete"); // 删除触发器
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash"); db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash"); // 删除触发器
// 创建新的触发器
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER); 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_UPDATE_TRIGGER);
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER); db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
@ -235,128 +228,130 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER); db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
} }
// 创建系统文件夹
private void createSystemFolder(SQLiteDatabase db) { private void createSystemFolder(SQLiteDatabase db) {
ContentValues values = new ContentValues(); ContentValues values = new ContentValues(); // 创建内容值对象
/** // 为通话记录文件夹插入记录
* call record foler for call notes
*/
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER); values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values); // 插入记录
/** // 创建根文件夹
* root folder which is default folder values.clear(); // 清空内容值
*/
values.clear();
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER); values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values); // 插入记录
/** // 创建临时文件夹
* temporary folder which is used for moving note values.clear(); // 清空内容值
*/
values.clear();
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER); values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values); // 插入记录
/** // 创建垃圾桶文件夹
* create trash folder values.clear(); // 清空内容值
*/
values.clear();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values); // 插入记录
} }
// 创建数据表
public void createDataTable(SQLiteDatabase db) { public void createDataTable(SQLiteDatabase db) {
db.execSQL(CREATE_DATA_TABLE_SQL); db.execSQL(CREATE_DATA_TABLE_SQL); // 执行创建表的SQL语句
reCreateDataTableTriggers(db); reCreateDataTableTriggers(db); // 重新创建触发器
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL); db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL); // 创建索引
Log.d(TAG, "data table has been created"); Log.d(TAG, "data table has been created"); // 日志输出
} }
// 重新创建数据表的所有触发器
private void reCreateDataTableTriggers(SQLiteDatabase db) { 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_insert"); // 删除触发器
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update"); db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update"); // 删除触发器
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete"); db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete"); // 删除触发器
// 创建新的触发器
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER); 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_UPDATE_TRIGGER);
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER); db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
} }
// 获取NotesDatabaseHelper的单例实例
static synchronized NotesDatabaseHelper getInstance(Context context) { static synchronized NotesDatabaseHelper getInstance(Context context) {
if (mInstance == null) { if (mInstance == null) { // 如果实例为空，则创建新的实例
mInstance = new NotesDatabaseHelper(context); mInstance = new NotesDatabaseHelper(context);
} }
return mInstance; return mInstance; // 返回实例
} }
// 当创建数据库时被调用
@Override @Override
public void onCreate(SQLiteDatabase db) { public void onCreate(SQLiteDatabase db) {
createNoteTable(db); createNoteTable(db); // 创建笔记表
createDataTable(db); createDataTable(db); // 创建数据表
} }
// 当升级数据库时被调用
@Override @Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
boolean reCreateTriggers = false; boolean reCreateTriggers = false; // 重创建触发器的标志
boolean skipV2 = false; boolean skipV2 = false; // 跳过V2的标志
if (oldVersion == 1) { if (oldVersion == 1) { // 如果旧版本是1
upgradeToV2(db); upgradeToV2(db); // 升级到V2
skipV2 = true; // this upgrade including the upgrade from v2 to v3 skipV2 = true; // 跳过V2的标志设为true
oldVersion++; oldVersion++; // 增加版本号
} }
if (oldVersion == 2 && !skipV2) { if (oldVersion == 2 && !skipV2) { // 如果旧版本是2且没有跳过
upgradeToV3(db); upgradeToV3(db); // 升级到V3
reCreateTriggers = true; reCreateTriggers = true; // 设置重创建触发器的标志为true
oldVersion++; oldVersion++; // 增加版本号
} }
if (oldVersion == 3) { if (oldVersion == 3) { // 如果旧版本是3
upgradeToV4(db); upgradeToV4(db); // 升级到V4
oldVersion++; oldVersion++; // 增加版本号
} }
if (reCreateTriggers) { if (reCreateTriggers) { // 如果需要重创建触发器
reCreateNoteTableTriggers(db); reCreateNoteTableTriggers(db); // 重新创建笔记表的触发器
reCreateDataTableTriggers(db); reCreateDataTableTriggers(db); // 重新创建数据表的触发器
} }
if (oldVersion != newVersion) { if (oldVersion != newVersion) { // 如果版本不一致，则抛出异常
throw new IllegalStateException("Upgrade notes database to version " + newVersion throw new IllegalStateException("Upgrade notes database to version " + newVersion
+ "fails"); + " fails");
} }
} }
// 升级到V2
private void upgradeToV2(SQLiteDatabase db) { private void upgradeToV2(SQLiteDatabase db) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); // 删除笔记表
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); // 删除数据表
createNoteTable(db); createNoteTable(db); // 创建笔记表
createDataTable(db); createDataTable(db); // 创建数据表
} }
// 升级到V3
private void upgradeToV3(SQLiteDatabase db) { 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_insert");
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete"); db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update"); db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
// add a column for gtask id // 为笔记添加一个新的字符ID列
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
+ " TEXT NOT NULL DEFAULT ''"); + " TEXT NOT NULL DEFAULT ''");
// add a trash system folder // 添加一个垃圾桶系统文件夹
ContentValues values = new ContentValues(); ContentValues values = new ContentValues();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values); // 插入记录
} }
// 升级到V4
private void upgradeToV4(SQLiteDatabase db) { private void upgradeToV4(SQLiteDatabase db) {
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
+ " INTEGER NOT NULL DEFAULT 0"); + " INTEGER NOT NULL DEFAULT 0"); // 为笔记表添加版本列
} }
} }

214
Notes-master/src/net/micode/notes/data/NotesProvider.java
Unescape View File

@ -16,7 +16,7 @@
package net.micode.notes.data; package net.micode.notes.data;
// 导入需要的Android和本地类
import android.app.SearchManager; import android.app.SearchManager;
import android.content.ContentProvider; import android.content.ContentProvider;
import android.content.ContentUris; import android.content.ContentUris;
@ -34,271 +34,317 @@ import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.NoteColumns; import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.data.NotesDatabaseHelper.TABLE; import net.micode.notes.data.NotesDatabaseHelper.TABLE;
/**
* NotesProvider 类继承自 ContentProvider，
* 负责与外部交互以进行笔记数据的增删改查操作。
*/
public class NotesProvider extends ContentProvider { public class NotesProvider extends ContentProvider {
// UriMatcher，用于匹配不同的URI请求
private static final UriMatcher mMatcher; private static final UriMatcher mMatcher;
// 数据库助手实例
private NotesDatabaseHelper mHelper; private NotesDatabaseHelper mHelper;
// 日志标签
private static final String TAG = "NotesProvider"; private static final String TAG = "NotesProvider";
private static final int URI_NOTE = 1; // 定义URI常量
private static final int URI_NOTE_ITEM = 2; private static final int URI_NOTE = 1; // 笔记 URI
private static final int URI_DATA = 3; private static final int URI_NOTE_ITEM = 2; // 单个笔记 URI
private static final int URI_DATA_ITEM = 4; private static final int URI_DATA = 3; // 数据 URI
private static final int URI_DATA_ITEM = 4; // 单个数据 URI
private static final int URI_SEARCH = 5; private static final int URI_SEARCH = 5; // 搜索 URI
private static final int URI_SEARCH_SUGGEST = 6; private static final int URI_SEARCH_SUGGEST = 6; // 搜索建议 URI
// 静态代码块，初始化 URI 匹配器并添加各种 URI 匹配规则
static { static {
mMatcher = new UriMatcher(UriMatcher.NO_MATCH); mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE); mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE); // 笔记的 URI
mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM); mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM); // 单个笔记的 URI
mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA); mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA); // 数据的 URI
mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM); mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM); // 单个数据的 URI
mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH); mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH); // 搜索 URI
mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST); mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST); // 搜索建议 URI
mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST); mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST); // 带参数的搜索建议 URI
} }
/** /**
* x'0A' represents the '\n' character in sqlite. For title and content in the search result, * 在搜索结果中，x'0A' 代表换行符。为了更好地展示信息，
* we will trim '\n' and white space in order to show more information. * 我们将搜索结果中的标题和内容进行修剪以去除换行符和空格。
*/ */
private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + "," private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + "," // 笔记 ID
+ NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + "," + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + "," // 笔记 ID 作为意图额外数据
+ "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + "," + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + "," // 修剪后的内容作为建议文本1
+ "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + "," + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + "," // 修剪后的内容作为建议文本2
+ R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + "," + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + "," // 搜索结果图标
+ "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + "," + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + "," // 意图行为
+ "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA; + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA; // 笔记内容类型
// 搜索笔记的 SQL 查询语句
private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
+ " FROM " + TABLE.NOTE + " FROM " + TABLE.NOTE // 查询的表为笔记表
+ " WHERE " + NoteColumns.SNIPPET + " LIKE ?" + " WHERE " + NoteColumns.SNIPPET + " LIKE ?" // 根据内容片段进行模糊匹配
+ " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER // 排除回收站的内容
+ " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE; + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE; // 仅匹配笔记类型
@Override @Override
public boolean onCreate() { public boolean onCreate() {
// 初始化数据库助手
mHelper = NotesDatabaseHelper.getInstance(getContext()); mHelper = NotesDatabaseHelper.getInstance(getContext());
return true; return true; // 创建成功
} }
@Override @Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) { String sortOrder) {
// 查询方法，处理不同的URI请求并返回结果的Cursor
Cursor c = null; Cursor c = null;
SQLiteDatabase db = mHelper.getReadableDatabase(); SQLiteDatabase db = mHelper.getReadableDatabase(); // 获取可读数据库
String id = null; String id = null; // 用于存储ID
switch (mMatcher.match(uri)) {
switch (mMatcher.match(uri)) { // 根据URI匹配不同的查询类型
case URI_NOTE: case URI_NOTE:
c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null, // 查询所有笔记
sortOrder); c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null, sortOrder);
break; break;
case URI_NOTE_ITEM: case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1); // 查询单个笔记
id = uri.getPathSegments().get(1); // 从URI中获取笔记ID
c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs, null, null, sortOrder); + parseSelection(selection), selectionArgs, null, null, sortOrder);
break; break;
case URI_DATA: case URI_DATA:
c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null, // 查询所有数据
sortOrder); c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null, sortOrder);
break; break;
case URI_DATA_ITEM: case URI_DATA_ITEM:
id = uri.getPathSegments().get(1); // 查询单个数据
id = uri.getPathSegments().get(1); // 从URI中获取数据ID
c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs, null, null, sortOrder); + parseSelection(selection), selectionArgs, null, null, sortOrder);
break; break;
case URI_SEARCH: case URI_SEARCH:
case URI_SEARCH_SUGGEST: case URI_SEARCH_SUGGEST:
if (sortOrder != null || projection != null) { if (sortOrder != null || projection != null) {
// 搜索请求不支持排序或选择
throw new IllegalArgumentException( throw new IllegalArgumentException(
"do not specify sortOrder, selection, selectionArgs, or projection" + "with this query"); "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
} }
String searchString = null; String searchString = null;
if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) { if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
// 获取搜索建议的参数
if (uri.getPathSegments().size() > 1) { if (uri.getPathSegments().size() > 1) {
searchString = uri.getPathSegments().get(1); searchString = uri.getPathSegments().get(1);
} }
} else { } else {
// 从查询参数获取搜索字符串
searchString = uri.getQueryParameter("pattern"); searchString = uri.getQueryParameter("pattern");
} }
if (TextUtils.isEmpty(searchString)) { if (TextUtils.isEmpty(searchString)) {
return null; return null; // 如果搜索字符串为空，则返回null
} }
try { try {
// 使用通配符模糊匹配
searchString = String.format("%%%s%%", searchString); searchString = String.format("%%%s%%", searchString);
c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY, c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
new String[] { searchString }); new String[] { searchString }); // 执行搜索查询
} catch (IllegalStateException ex) { } catch (IllegalStateException ex) {
Log.e(TAG, "got exception: " + ex.toString()); Log.e(TAG, "got exception: " + ex.toString()); // 记录异常
} }
break; break;
default: default:
// 未知的URI，抛出异常
throw new IllegalArgumentException("Unknown URI " + uri); throw new IllegalArgumentException("Unknown URI " + uri);
} }
if (c != null) { if (c != null) {
// 设置通知URI，数据变化时通知的URI
c.setNotificationUri(getContext().getContentResolver(), uri); c.setNotificationUri(getContext().getContentResolver(), uri);
} }
return c; return c; // 返回查询结果
} }
@Override @Override
public Uri insert(Uri uri, ContentValues values) { public Uri insert(Uri uri, ContentValues values) {
SQLiteDatabase db = mHelper.getWritableDatabase(); // 插入数据方法
long dataId = 0, noteId = 0, insertedId = 0; SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写数据库
switch (mMatcher.match(uri)) { long dataId = 0, noteId = 0, insertedId = 0; // 初始化ID
switch (mMatcher.match(uri)) { // 根据URI匹配不同的插入类型
case URI_NOTE: case URI_NOTE:
// 插入新的笔记
insertedId = noteId = db.insert(TABLE.NOTE, null, values); insertedId = noteId = db.insert(TABLE.NOTE, null, values);
break; break;
case URI_DATA: case URI_DATA:
// 插入新的数据
if (values.containsKey(DataColumns.NOTE_ID)) { if (values.containsKey(DataColumns.NOTE_ID)) {
// 获取关联的笔记ID
noteId = values.getAsLong(DataColumns.NOTE_ID); noteId = values.getAsLong(DataColumns.NOTE_ID);
} else { } else {
Log.d(TAG, "Wrong data format without note id:" + values.toString()); Log.d(TAG, "Wrong data format without note id:" + values.toString()); // 记录错误日志
} }
insertedId = dataId = db.insert(TABLE.DATA, null, values); insertedId = dataId = db.insert(TABLE.DATA, null, values);
break; break;
default: default:
// 未知的URI，抛出异常
throw new IllegalArgumentException("Unknown URI " + uri); throw new IllegalArgumentException("Unknown URI " + uri);
} }
// Notify the note uri
// 当笔记插入成功时，通知笔记URI
if (noteId > 0) { if (noteId > 0) {
getContext().getContentResolver().notifyChange( getContext().getContentResolver().notifyChange(
ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null); ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
} }
// Notify the data uri // 当数据插入成功时，通知数据URI
if (dataId > 0) { if (dataId > 0) {
getContext().getContentResolver().notifyChange( getContext().getContentResolver().notifyChange(
ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null); ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
} }
return ContentUris.withAppendedId(uri, insertedId); return ContentUris.withAppendedId(uri, insertedId); // 返回新插入项的URI
} }
@Override @Override
public int delete(Uri uri, String selection, String[] selectionArgs) { public int delete(Uri uri, String selection, String[] selectionArgs) {
int count = 0; // 删除数据方法
String id = null; int count = 0; // 计数删除的行数
SQLiteDatabase db = mHelper.getWritableDatabase(); String id = null; // 用于存储ID
boolean deleteData = false; SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写数据库
switch (mMatcher.match(uri)) { boolean deleteData = false; // 标记是否删除数据
switch (mMatcher.match(uri)) { // 根据URI匹配不同的删除类型
case URI_NOTE: case URI_NOTE:
selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 "; // 删除所有笔记
selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 "; // 除去系统文件夹
count = db.delete(TABLE.NOTE, selection, selectionArgs); count = db.delete(TABLE.NOTE, selection, selectionArgs);
break; break;
case URI_NOTE_ITEM: case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1); // 删除单个笔记
/** id = uri.getPathSegments().get(1); // 从URI中获取笔记ID
* ID that smaller than 0 is system folder which is not allowed to
* trash
*/
long noteId = Long.valueOf(id); long noteId = Long.valueOf(id);
if (noteId <= 0) { if (noteId <= 0) {
break; break; // 系统文件夹不允许删除
} }
count = db.delete(TABLE.NOTE, count = db.delete(TABLE.NOTE,
NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs); NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
break; break;
case URI_DATA: case URI_DATA:
// 删除所有数据
count = db.delete(TABLE.DATA, selection, selectionArgs); count = db.delete(TABLE.DATA, selection, selectionArgs);
deleteData = true; deleteData = true; // 标记为删除数据
break; break;
case URI_DATA_ITEM: case URI_DATA_ITEM:
id = uri.getPathSegments().get(1); // 删除单个数据
id = uri.getPathSegments().get(1); // 从URI中获取数据ID
count = db.delete(TABLE.DATA, count = db.delete(TABLE.DATA,
DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs); DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
deleteData = true; deleteData = true; // 标记为删除数据
break; break;
default: default:
// 未知的URI，抛出异常
throw new IllegalArgumentException("Unknown URI " + uri); throw new IllegalArgumentException("Unknown URI " + uri);
} }
if (count > 0) { if (count > 0) {
if (deleteData) { if (deleteData) {
// 如果删除了数据，通知笔记URI
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
} }
// 通知数据URI
getContext().getContentResolver().notifyChange(uri, null); getContext().getContentResolver().notifyChange(uri, null);
} }
return count; return count; // 返回删除的行数
} }
@Override @Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
int count = 0; // 更新数据方法
String id = null; int count = 0; // 计数更新的行数
SQLiteDatabase db = mHelper.getWritableDatabase(); String id = null; // 用于存储ID
boolean updateData = false; SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写数据库
switch (mMatcher.match(uri)) { boolean updateData = false; // 标记是否更新数据
switch (mMatcher.match(uri)) { // 根据URI匹配不同的更新类型
case URI_NOTE: case URI_NOTE:
increaseNoteVersion(-1, selection, selectionArgs); // 更新所有笔记
increaseNoteVersion(-1, selection, selectionArgs); // 更新版本
count = db.update(TABLE.NOTE, values, selection, selectionArgs); count = db.update(TABLE.NOTE, values, selection, selectionArgs);
break; break;
case URI_NOTE_ITEM: case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1); // 更新单个笔记
increaseNoteVersion(Long.valueOf(id), selection, selectionArgs); id = uri.getPathSegments().get(1); // 从URI中获取笔记ID
increaseNoteVersion(Long.valueOf(id), selection, selectionArgs); // 更新版本
count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs); + parseSelection(selection), selectionArgs);
break; break;
case URI_DATA: case URI_DATA:
// 更新所有数据
count = db.update(TABLE.DATA, values, selection, selectionArgs); count = db.update(TABLE.DATA, values, selection, selectionArgs);
updateData = true; updateData = true; // 标记为更新数据
break; break;
case URI_DATA_ITEM: case URI_DATA_ITEM:
id = uri.getPathSegments().get(1); // 更新单个数据
id = uri.getPathSegments().get(1); // 从URI中获取数据ID
count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs); + parseSelection(selection), selectionArgs);
updateData = true; updateData = true; // 标记为更新数据
break; break;
default: default:
// 未知的URI，抛出异常
throw new IllegalArgumentException("Unknown URI " + uri); throw new IllegalArgumentException("Unknown URI " + uri);
} }
if (count > 0) { if (count > 0) {
if (updateData) { if (updateData) {
// 如果更新了数据，通知笔记URI
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
} }
// 通知数据URI
getContext().getContentResolver().notifyChange(uri, null); getContext().getContentResolver().notifyChange(uri, null);
} }
return count; return count; // 返回更新的行数
} }
// 辅助方法，用于解析选择条件
private String parseSelection(String selection) { private String parseSelection(String selection) {
return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""); return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""); // 如果选择条件不为空则添加 AND
} }
// 辅助方法，用于增加笔记版本
private void increaseNoteVersion(long id, String selection, String[] selectionArgs) { private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
StringBuilder sql = new StringBuilder(120); StringBuilder sql = new StringBuilder(120);
sql.append("UPDATE "); sql.append("UPDATE ");
sql.append(TABLE.NOTE); sql.append(TABLE.NOTE);
sql.append(" SET "); sql.append(" SET ");
sql.append(NoteColumns.VERSION); sql.append(NoteColumns.VERSION);
sql.append("=" + NoteColumns.VERSION + "+1 "); sql.append("=" + NoteColumns.VERSION + "+1 "); // 增加版本号
if (id > 0 || !TextUtils.isEmpty(selection)) { if (id > 0 || !TextUtils.isEmpty(selection)) {
sql.append(" WHERE "); sql.append(" WHERE "); // 如果有ID或选择条件，添加WHERE
} }
if (id > 0) { if (id > 0) {
sql.append(NoteColumns.ID + "=" + String.valueOf(id)); sql.append(NoteColumns.ID + "=" + String.valueOf(id)); // 添加ID条件
} }
if (!TextUtils.isEmpty(selection)) { if (!TextUtils.isEmpty(selection)) {
// 处理选择参数
String selectString = id > 0 ? parseSelection(selection) : selection; String selectString = id > 0 ? parseSelection(selection) : selection;
for (String args : selectionArgs) { for (String args : selectionArgs) {
selectString = selectString.replaceFirst("\\?", args); selectString = selectString.replaceFirst("\\?", args); // 替换占位符
} }
sql.append(selectString); sql.append(selectString);
} }
mHelper.getWritableDatabase().execSQL(sql.toString()); mHelper.getWritableDatabase().execSQL(sql.toString()); // 执行SQL更新版本号
} }
@Override @Override
public String getType(Uri uri) { public String getType(Uri uri) {
// TODO Auto-generated method stub // 返回特定URI的MIME类型，这里暂时不实现
return null; return null;
} }

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