diff --git a/src/data/Contact.java b/src/data/Contact.java deleted file mode 100644 index dcf2f1f..0000000 --- a/src/data/Contact.java +++ /dev/null @@ -1,84 +0,0 @@ -/* - * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package net.micode.notes.data; - -import android.content.Context; -import android.database.Cursor; -import android.provider.ContactsContract.CommonDataKinds.Phone; -import android.provider.ContactsContract.Data; -import android.telephony.PhoneNumberUtils; -import android.util.Log; - -import java.util.HashMap; - -//联系人管理类，用于获取手机联系人的信息 -public class Contact { - private static HashMap sContactCache; - private static final String TAG = "Contact"; - - //定义字符串CALLER_ID_SELECTION - private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER - + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'" - + " AND " + Data.RAW_CONTACT_ID + " IN " - + "(SELECT raw_contact_id " - + " FROM phone_lookup" - + " WHERE min_match = '+')"; - - //获取指定手机号码对应的联系人的姓名 - public static String getContact(Context context, String phoneNumber) { - //查找HashMap中是否已有phoneNumber信息 - //是否存在该手机号码的联系人信息 - if(sContactCache == null) { - sContactCache = new HashMap();//如果没有，则根据给定的号码查询系统数据库，获取联系人姓名 - } - - if(sContactCache.containsKey(phoneNumber)) { - return sContactCache.get(phoneNumber);//如果有，那就直接返回缓存结果就可以了 - } - - //查找数据库中phoneNumber的信息 - //查询联系人名CALLER_ID_SELECTION - String selection = CALLER_ID_SELECTION.replace("+", - PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)); - Cursor cursor = context.getContentResolver().query(//ContentResolver对象查询数据，将结果给cursor对象 - Data.CONTENT_URI, - new String [] { Phone.DISPLAY_NAME }, - selection, - new String[] { phoneNumber }, - null); - - //判定查询结果，moveToFirst()返回第一条 - if (cursor != null && cursor.moveToFirst()) {//如果查询成功且不为空， - try { - //找到相关信息 - String name = cursor.getString(0);//那么就从cursor中获取联系人的姓名 - sContactCache.put(phoneNumber, name);//并且存入sContactCache中作为缓存 - return name; - //找到异常 - } catch (IndexOutOfBoundsException e) { - Log.e(TAG, " Cursor get string error " + e.toString()); - return null; - } finally { - cursor.close(); - } - //未找到相关信息 - } else { - Log.d(TAG, "No contact matched with number:" + phoneNumber); - return null;//查询失败或者没有结果，那么就返回空值null - } - } -} diff --git a/src/data/Notes.java b/src/data/Notes.java deleted file mode 100644 index 1b0dc34..0000000 --- a/src/data/Notes.java +++ /dev/null @@ -1,293 +0,0 @@ -/* - * 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; - -//Notes类中定义了很多常量，这些常量大多是int型和string型 -public class Notes { - public static final String AUTHORITY = "micode_notes";//常量，用于标识该应用程序的权限 - public static final String TAG = "Notes";//常量，用于标识该应用程序的标签 - - //以下三个常量对NoteColumns.TYPE的值进行设置时会用到 - //定义的标签类型 - public static final int TYPE_NOTE = 0;//普通标签 - public static final int TYPE_FOLDER = 1;//文件夹 - public static final int TYPE_SYSTEM = 2;//系统文件夹 - - /** - * 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 - */ - - //定义了系统文件夹的标识符 - public static final int ID_ROOT_FOLDER = 0;//根文件夹 - public static final int ID_TEMPARAY_FOLDER = -1;//临时文件夹 - public static final int ID_CALL_RECORD_FOLDER = -2;//存储通话记录文件夹 - public static final int ID_TRASH_FOLER = -3; - - //这些常量定义了在intent中传递的额外信息的键值，如提醒日期、背景颜色ID、小部件ID等等 - 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"; - - //这些常量定义了小部件的类型 - public static final int TYPE_WIDGET_INVALIDE = -1;//无效类型 - public static final int TYPE_WIDGET_2X = 0;//2x小部件 - public static final int TYPE_WIDGET_4X = 1;//4x小部件 - - public static class DataConstants { - public static final String NOTE = TextNote.CONTENT_ITEM_TYPE; - public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; - } - - /** - * Uri to query all notes and folders - */ - public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");//定义查询便签和文件夹的指针 - - /** - * Uri to query data - */ - public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");//定义查找数据的指针 - - //NoteColumns接口定义了便签的属性，如唯一ID、父级ID、创建日期、修改日期、提醒日期、内容片段、小部件ID等。它还定义了用于标识便签类型、同步ID、本地修改标记等。 - public interface NoteColumns { - /** - * The unique ID for a row - *

Type: INTEGER (long)

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

Type: INTEGER (long)

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

Type: INTEGER (long)

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

Type: INTEGER (long)

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

Type: INTEGER (long)

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

Type: TEXT

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

Type: INTEGER (long)

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

Type: INTEGER (long)

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

Type: INTEGER (long)

- */ - public static final String BG_COLOR_ID = "bg_color_id"; - - /** - * For text note, it doesn't has attachment, for multi-media - * note, it has at least one attachment - *

Type: INTEGER

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

Type: INTEGER (long)

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

Type: INTEGER

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

Type: INTEGER (long)

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

Type: INTEGER

- */ - public static final String LOCAL_MODIFIED = "local_modified"; - - /** - * Original parent id before moving into temporary folder - *

Type : INTEGER

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

Type : TEXT

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

Type : INTEGER (long)

- */ - public static final String VERSION = "version"; - }//这些常量主要是定义标签的属性的 - - //DataColumns接口定义了便签内容的属性，如唯一ID、MIME类型、所属便签的引用ID、创建日期、修改日期、内容等。它还定义了用于存储便签内容的通用数据列。 - public interface DataColumns { - /** - * The unique ID for a row - *

Type: INTEGER (long)

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

Type: Text

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

Type: INTEGER (long)

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

Type: INTEGER (long)

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

Type: INTEGER (long)

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

Type: TEXT

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

Type: INTEGER

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

Type: INTEGER

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

Type: TEXT

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

Type: TEXT

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

Type: TEXT

- */ - public static final String DATA5 = "data5"; - }//主要是定义存储标签内容数据的 - - //TextNote和CallNote是DataColumns接口的实现类， - // 分别表示文本便签和电话便签的数据结构。 - // 它们定义了特定于该类型的属性，如文本便签的模式（检查列表模式或普通模式）和电话便签的通话日期和电话号码。 - public static final class TextNote implements DataColumns { - /** - * Mode to indicate the text in check list mode or not - *

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

- */ - public static final String MODE = DATA1; - - public static final int MODE_CHECK_LIST = 1; - - public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note"; - - public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note"; - - public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note"); - }//文本内容的数据结构 - - public static final class CallNote implements DataColumns { - /** - * Call date for this record - *

Type: INTEGER (long)

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

Type: TEXT

- */ - public static final String PHONE_NUMBER = DATA3; - - public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note"; - - public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note"; - - public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note"); - }//电话内容的数据结构 -} diff --git a/src/data/NotesDatabaseHelper.java b/src/data/NotesDatabaseHelper.java deleted file mode 100644 index a7ac461..0000000 --- a/src/data/NotesDatabaseHelper.java +++ /dev/null @@ -1,373 +0,0 @@ -/* - * 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;//用于保存一些数据（string boolean byte double float int long short ...）信息，这些信息可以被数据库操作时使用 -import android.content.Context;//加载和访问资源 -import android.database.sqlite.SQLiteDatabase;//主要提供了对应于添加、删除、更新、查询的操作方法：insert()、delete()、update()、query()。配合content.values -import android.database.sqlite.SQLiteOpenHelper;//用来管理数据的创建和版本更新 -import android.util.Log; - -import net.micode.notes.data.Notes.DataColumns; -import net.micode.notes.data.Notes.DataConstants; -import net.micode.notes.data.Notes.NoteColumns; -//数据库操作，用SQLOpenhelper，对一些note和文件进行数据库的操作，比如删除文件后，将文件里的note也相应删除 - -//定义了一个 NotesDatabaseHelper类，这是一个辅助类，它继承自SQLiteOpenHelper类，提供了创建和管理SQLite数据库的方法。 -public class NotesDatabaseHelper extends SQLiteOpenHelper { - private static final String DB_NAME = "note.db";//数据库的名字 - - private static final int DB_VERSION = 4;//数据库的版本号 - - public interface TABLE {//接口，分成note和data，在后面的程序里分别使用过 - public static final String NOTE = "note"; - - public static final String DATA = "data"; - } - - private static final String TAG = "NotesDatabaseHelper"; - - private static NotesDatabaseHelper mInstance; - - private static final String CREATE_NOTE_TABLE_SQL =//SQL语句，用于创建存储笔记信息的表格 - "CREATE TABLE " + TABLE.NOTE + "(" + - NoteColumns.ID + " INTEGER PRIMARY KEY," + - NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + - NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + - NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + - NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," + - NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + - NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + - ")";//数据库中需要存储的项目的名称，就相当于创建一个表格的表头的内容 - - private static final String CREATE_DATA_TABLE_SQL =//SQL语句，用于创建存储笔记内容的表格 - "CREATE TABLE " + TABLE.DATA + "(" + - DataColumns.ID + " INTEGER PRIMARY KEY," + - DataColumns.MIME_TYPE + " TEXT NOT NULL," + - DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," + - NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + - NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + - DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," + - DataColumns.DATA1 + " INTEGER," + - DataColumns.DATA2 + " INTEGER," + - DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + - DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + - DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + - ")";//和上面的功能一样，主要是存储的项目不同 - - private static final String CREATE_DATA_NOTE_ID_INDEX_SQL = - "CREATE INDEX IF NOT EXISTS note_id_index ON " + - TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";//存储便签编号的一个数据表格 - - /** - * Increase folder's note count when move note to the folder - */ - private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = - "CREATE TRIGGER increase_folder_count_on_update "+ - " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE + - " BEGIN " + - " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + - " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + - " END";//在文件夹中移入一个Note之后需要更改的数据的表格 - - /** - * Decrease folder's note count when move note from folder - */ - private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =//创建一个update功能的触发器， - "CREATE TRIGGER decrease_folder_count_on_update " + - " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE + - " BEGIN " + - " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" + - " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + - " AND " + NoteColumns.NOTES_COUNT + ">0" + ";" + - " END";//在文件夹中移出一个Note之后需要更改的数据的表格 - - /** - * Increase folder's note count when insert new note to the folder - */ - private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =//创建一个insert功能的触发器，向文件夹中插入笔记时自动增加该文件夹的笔记数量 - "CREATE TRIGGER increase_folder_count_on_insert " + - " AFTER INSERT ON " + TABLE.NOTE + - " BEGIN " + - " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + - " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + - " END";//在文件夹中插入一个Note之后需要更改的数据的表格 - - /** - * Decrease folder's note count when delete note from the folder - */ - private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =//创建一个删除功能的触发器 - "CREATE TRIGGER decrease_folder_count_on_delete " + - " AFTER DELETE ON " + TABLE.NOTE + - " BEGIN " + - " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" + - " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + - " AND " + NoteColumns.NOTES_COUNT + ">0;" + - " END";//在文件夹中删除一个Note之后需要更改的数据的表格 - - /** - * Update note's content when insert data with type {@link DataConstants#NOTE} - */ - private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER = - "CREATE TRIGGER update_note_content_on_insert " + - " AFTER INSERT ON " + TABLE.DATA + - " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + - " BEGIN" + - " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + - " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + - " END";//在文件夹中对Note导入一个新的数据之后需要更改的数据的表格 - - /** - * Update note's content when data with {@link DataConstants#NOTE} type has changed - */ - private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER = - "CREATE TRIGGER update_note_content_on_update " + - " AFTER UPDATE ON " + TABLE.DATA + - " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + - " BEGIN" + - " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + - " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + - " END";//Note数据被修改后需要更改的数据的表格 - - /** - * Update note's content when data with {@link DataConstants#NOTE} type has deleted - */ - private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER = - "CREATE TRIGGER update_note_content_on_delete " + - " AFTER delete ON " + TABLE.DATA + - " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + - " BEGIN" + - " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.SNIPPET + "=''" + - " WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" + - " END";//Note数据被删除后需要更改的数据的表格 - - /** - * Delete datas belong to note which has been deleted - */ - private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER = - "CREATE TRIGGER delete_data_on_delete " + - " AFTER DELETE ON " + TABLE.NOTE + - " BEGIN" + - " DELETE FROM " + TABLE.DATA + - " WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" + - " END";//删除已删除的便签的数据后需要更改的数据的表格 - - /** - * Delete notes belong to folder which has been deleted - */ - private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER = - "CREATE TRIGGER folder_delete_notes_on_delete " + - " AFTER DELETE ON " + TABLE.NOTE + - " BEGIN" + - " DELETE FROM " + TABLE.NOTE + - " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + - " END";//删除已删除的文件夹的便签后需要更改的数据的表格 - - /** - * Move notes belong to folder which has been moved to trash folder - */ - private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER = - "CREATE TRIGGER folder_move_notes_on_trash " + - " AFTER UPDATE ON " + TABLE.NOTE + - " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER + - " BEGIN" + - " UPDATE " + TABLE.NOTE + - " SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER + - " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + - " END";//还原垃圾桶中的便签后需要更改的数据的表格 - - public NotesDatabaseHelper(Context context) { - super(context, DB_NAME, null, DB_VERSION); - }//构造数据库，传入数据库的名称和版本 - - public void createNoteTable(SQLiteDatabase db) { - db.execSQL(CREATE_NOTE_TABLE_SQL); - reCreateNoteTableTriggers(db); - createSystemFolder(db); - Log.d(TAG, "note table has been created"); - }//创建表格（用来存储标签属性） - - private void reCreateNoteTableTriggers(SQLiteDatabase db) { - db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update"); - db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update"); - db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete"); - db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete"); - db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert"); - db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete"); - db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash"); - - db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER); - db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER); - db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER); - db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER); - db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER); - db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER); - db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER); - }//execSQL是数据库操作的API，主要是更改行为的SQL语句 - //在这里主要是用来重新创建上述定义的表格用的，先删除原来有的数据库的触发器，再重新创建新的数据库 - - private void createSystemFolder(SQLiteDatabase db) {//创建系统文件夹，四个类型为system类型的文件夹 - ContentValues values = new ContentValues(); - - //每个文件夹有唯一的ID,可以通过ID在数据库中查找，系统文件夹用来管理笔记的分类、移动和删除等操作 - /** - * call record foler for call notes - */ - //通话记录文件夹 - values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER); - values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); - db.insert(TABLE.NOTE, null, values); - - /** - * root folder which is default folder - */ - //根文件夹 - values.clear(); - values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER); - values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); - db.insert(TABLE.NOTE, null, values); - - /** - * temporary folder which is used for moving note - */ - //临时文件夹 - values.clear(); - values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER); - values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); - db.insert(TABLE.NOTE, null, values); - - /** - * create trash folder - */ - //回收站文件夹 - values.clear(); - values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); - values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); - db.insert(TABLE.NOTE, null, values); - }//创建几个系统文件夹 - - public void createDataTable(SQLiteDatabase db) {//用于创建数据库中的表格，在onCreate()方法中调用 - db.execSQL(CREATE_DATA_TABLE_SQL); - reCreateDataTableTriggers(db); - db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL); - Log.d(TAG, "data table has been created"); - }//创建表格，用来存储标签内容 - - private void reCreateDataTableTriggers(SQLiteDatabase db) {//用于创建数据库的触发器，在onCreate()方法中调用 - db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert"); - db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update"); - db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete"); - - db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER); - db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER); - db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER); - }//同上面的execSQL - - //使用 synchronized 关键字来确保在多线程环境下只创建一个 NotesDatabaseHelper 实例。这样可以避免并发访问数据库时出现问题。 - static synchronized NotesDatabaseHelper getInstance(Context context) { - if (mInstance == null) { - mInstance = new NotesDatabaseHelper(context); - } - return mInstance; - }//上网查是为解决同一时刻只能有一个线程执行 - //在写程序库代码时，有时有一个类需要被所有的其它类使用 - //但又要求这个类只能被实例化一次，是个服务类，定义一次，其它类使用同一个这个类的实例 - - @Override - public void onCreate(SQLiteDatabase db) {//数据库在首次创建时会调用 - createNoteTable(db); - createDataTable(db); - }//实现两个表格，上面创建的两个表格 - - @Override - public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {//数据库版本升级时调用 - boolean reCreateTriggers = false; - boolean skipV2 = false; - - if (oldVersion == 1) { - upgradeToV2(db); - skipV2 = true; // this upgrade including the upgrade from v2 to v3 - oldVersion++; - } - - if (oldVersion == 2 && !skipV2) { - upgradeToV3(db); - reCreateTriggers = true; - oldVersion++; - } - - if (oldVersion == 3) { - upgradeToV4(db); - oldVersion++; - } - - if (reCreateTriggers) { - reCreateNoteTableTriggers(db); - reCreateDataTableTriggers(db); - } - - if (oldVersion != newVersion) { - throw new IllegalStateException("Upgrade notes database to version " + newVersion - + "fails"); - } - }//数据库版本的更新（数据库内容的更改） - - //使用 SQLiteDatabase 类提供的 execSQL() 方法执行创建系统文件夹、表格和触发器的 SQL 语句。 - private void upgradeToV2(SQLiteDatabase db) { - db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); - db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); - createNoteTable(db); - createDataTable(db); - }//更新到v2版本 - - private void upgradeToV3(SQLiteDatabase db) { - // drop unused triggers - 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 - db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID - + " TEXT NOT NULL DEFAULT ''"); - // add a trash system folder - 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); - }//更新到v3版本 - - private void upgradeToV4(SQLiteDatabase db) { - db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION - + " INTEGER NOT NULL DEFAULT 0"); - }//更新到v4版本 -} diff --git a/src/data/NotesProvider.java b/src/data/NotesProvider.java deleted file mode 100644 index cbbfa75..0000000 --- a/src/data/NotesProvider.java +++ /dev/null @@ -1,363 +0,0 @@ -/* - * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package net.micode.notes.data; - - -import android.app.SearchManager; -import android.content.ContentProvider; -import android.content.ContentUris; -import android.content.ContentValues; -import android.content.Intent; -import android.content.UriMatcher; -import android.database.Cursor; -import android.database.sqlite.SQLiteDatabase; -import android.net.Uri; -import android.text.TextUtils; -import android.util.Log; - -import net.micode.notes.R; -import net.micode.notes.data.Notes.DataColumns; -import net.micode.notes.data.Notes.NoteColumns; -import net.micode.notes.data.NotesDatabaseHelper.TABLE; -//为存储和获取数据提供接口。可以在不同应用程序之间共享数据 -//ContentProvider提供的方法 -//query：查询 -//insert：插入 -//update：更新 -//delete：删除 -//getType：得到数据类型 - -public class NotesProvider extends ContentProvider {//包含了对数据的查询、插入、删除和更新操作 - //UriMatcher用于匹配Uri - private static final UriMatcher mMatcher; - - private NotesDatabaseHelper mHelper; - - 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; - - static { - //创建UriMatcher时，调用UriMatcher（UriMatcher.NO_MATCH）表示不匹配任何路径的返回码 - mMatcher = new UriMatcher(UriMatcher.NO_MATCH); - //把需要匹配Uri路径全部给注册上 - mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE); - mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM); - mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA); - mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM); - mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH); - mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST); - mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST); - } - - /** - * x'0A' 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. - */ - //声明NOTES_SEARCH_PROJECTION - private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + "," - + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + "," - + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + "," - + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + "," - + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + "," - + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + "," - + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA; - - //声明NOTES_SNIPPET_SEARCH_QUERY - 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; - - @Override - //Context只有在onCreate()中才能被初始化 - //对mHelper进行实例化 - //通过调用getContext()获取当前的上下文， - // 用NotesDatabaseHelper.getInstance(getContext())方法获取一个数据库的帮助类的实例 - public boolean onCreate() { - //将得到的数据库帮助类实例赋值给成员变量mHelper，以便在后续的方法中使用 - mHelper = NotesDatabaseHelper.getInstance(getContext()); - return true; - } - - @Override - //查询Uri在数据库中对应的位置 - //query方法用于查询数据。 - //它接收一个Uri参数，这个Uri参数用于指定要查询的数据。通过查询数据库并返回一个Cursor对象，可以获取到相应的数据。 - public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) { - Cursor c = null; - //获取可读数据库 - SQLiteDatabase db = mHelper.getReadableDatabase(); - String id = null; - //匹配查找Uri - switch (mMatcher.match(uri)) { - //对于不同的匹配值，在数据库中查找相应的条目 - case URI_NOTE: - c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null, - sortOrder); - break; - case URI_NOTE_ITEM: - id = uri.getPathSegments().get(1); - c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id - + parseSelection(selection), selectionArgs, null, null, sortOrder); - break; - case URI_DATA: - c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null, - sortOrder); - break; - case URI_DATA_ITEM: - id = uri.getPathSegments().get(1); - c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id - + parseSelection(selection), selectionArgs, null, null, sortOrder); - break; - case URI_SEARCH: - case URI_SEARCH_SUGGEST: - if (sortOrder != null || projection != null) { - //不合法的参数异常 - throw new IllegalArgumentException( - "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query"); - } - - String searchString = null; - if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) { - if (uri.getPathSegments().size() > 1) { - //getPathSegments()方法得到一个string的List - //在uri.getPathSegments().get(1)为第二个元素 - searchString = uri.getPathSegments().get(1); - } - } else { - searchString = uri.getQueryParameter("pattern"); - } - - if (TextUtils.isEmpty(searchString)) { - return null; - } - - try { - searchString = String.format("%%%s%%", searchString); - c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY, - new String[] { searchString }); - } catch (IllegalStateException ex) { - Log.e(TAG, "got exception: " + ex.toString()); - } - break; - default: - //抛出异常 - throw new IllegalArgumentException("Unknown URI " + uri); - } - if (c != null) { - c.setNotificationUri(getContext().getContentResolver(), uri); - } - return c; - } - - @Override - //insert()方法用于插入数据。 - //它接收一个uri参数，ContentValues参数。用于指定要插入的数据。 - //通过将数据插入到数据库中，并返回新插入数据的Uri，可以实现数据的插入操作。 - public Uri insert(Uri uri, ContentValues values) { - //获得可写的数据库 - SQLiteDatabase db = mHelper.getWritableDatabase(); - long dataId = 0, noteId = 0, insertedId = 0; - switch (mMatcher.match(uri)) { - //新增一个条目 - case URI_NOTE: - insertedId = noteId = db.insert(TABLE.NOTE, null, values); - break; - //如果存在，查找NOTE_ID - case URI_DATA: - if (values.containsKey(DataColumns.NOTE_ID)) { - noteId = values.getAsLong(DataColumns.NOTE_ID); - } else { - Log.d(TAG, "Wrong data format without note id:" + values.toString()); - } - insertedId = dataId = db.insert(TABLE.DATA, null, values); - break; - default: - throw new IllegalArgumentException("Unknown URI " + uri); - } - // Notify the note uri - if (noteId > 0) { - getContext().getContentResolver().notifyChange( - ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null); - } - - // Notify the data uri - //notifyChange获得一个ContentResolver对象并且更新里面的内容 - if (dataId > 0) { - getContext().getContentResolver().notifyChange( - ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null); - } - - //返回插入的uri的路径 - return ContentUris.withAppendedId(uri, insertedId); - } - - @Override - //删除一个uri - //delete()方法用于删除数据。 - //它接收一个uri参数，selection和selectionArgs参数， - //用于指定要删除的数据，通过在数据库中执行删除的操作，并返回受影响的行数，可以实现数据的删除操作 - public int delete(Uri uri, String selection, String[] selectionArgs) { - //Uri代表要操作的数据，Android上可用的每种资源 -包括 图像、视频片段、音频资源等都可以用Uri来表示。 - int count = 0; - String id = null; - //获得可写的数据库 - SQLiteDatabase db = mHelper.getWritableDatabase(); - boolean deleteData = false; - switch (mMatcher.match(uri)) { - case URI_NOTE: - selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 "; - count = db.delete(TABLE.NOTE, selection, selectionArgs); - break; - case URI_NOTE_ITEM: - 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; - } - count = db.delete(TABLE.NOTE, - NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs); - break; - case URI_DATA: - count = db.delete(TABLE.DATA, selection, selectionArgs); - deleteData = true; - break; - case URI_DATA_ITEM: - id = uri.getPathSegments().get(1); - count = db.delete(TABLE.DATA, - DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs); - deleteData = true; - break; - default: - throw new IllegalArgumentException("Unknown URI " + uri); - } - if (count > 0) { - if (deleteData) { - getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); - } - getContext().getContentResolver().notifyChange(uri, null); - } - return count; - } - - @Override - //更新一个Uri - //update()方法用于更新数据。 - //它接收一个Uri参数、一个ContentValues参数和一个可选的Selection和SelectionArgs参数 - //用于指定要更新的数据和更新条件。通过在数据库中执行更新操作，并返回受影响的行数，可以实现数据的更新操作。 - public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { - int count = 0; - String id = null; - SQLiteDatabase db = mHelper.getWritableDatabase(); - boolean updateData = false; - switch (mMatcher.match(uri)) { - case URI_NOTE: - increaseNoteVersion(-1, selection, selectionArgs); - count = db.update(TABLE.NOTE, values, selection, selectionArgs); - break; - case URI_NOTE_ITEM: - 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: - count = db.update(TABLE.DATA, values, selection, selectionArgs); - updateData = true; - break; - case URI_DATA_ITEM: - id = uri.getPathSegments().get(1); - count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id - + parseSelection(selection), selectionArgs); - updateData = true; - break; - default: - throw new IllegalArgumentException("Unknown URI " + uri); - } - - if (count > 0) { - if (updateData) { - getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); - } - getContext().getContentResolver().notifyChange(uri, null); - } - return count; - } - - //将字符串解析成规定格式 - private String parseSelection(String selection) { - return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""); - } - - //增加笔记版本号的方法 - private void increaseNoteVersion(long id, String selection, String[] selectionArgs) { - //创建一个 StringBuilder 对象，用于构建 SQL 语句 - StringBuilder sql = new StringBuilder(120); - - // 添加 UPDATE 语句的起始部分 - sql.append("UPDATE "); - sql.append(TABLE.NOTE); - sql.append(" SET "); - - //设置版本号字段的新值为原值加一 - sql.append(NoteColumns.VERSION); - sql.append("=" + NoteColumns.VERSION + "+1 "); - - // 如果存在 id 或者 selection，添加 WHERE 子句 - if (id > 0 || !TextUtils.isEmpty(selection)) { - sql.append(" WHERE "); - } - // 如果存在 id，添加 id 条件 - if (id > 0) { - sql.append(NoteColumns.ID + "=" + String.valueOf(id)); - } - // 如果存在 selection，解析并添加到 WHERE 子句中 - if (!TextUtils.isEmpty(selection)) { - String selectString = id > 0 ? parseSelection(selection) : selection; - for (String args : selectionArgs) { - selectString = selectString.replaceFirst("\\?", args); - } - sql.append(selectString); - } - - //执行 SQL 语句，更新笔记版本号 - //execSQL()方法可以执行insert、delete、update和CREATE TABLE之类有更改行为的SQL语句 - mHelper.getWritableDatabase().execSQL(sql.toString()); - } - - //getType()方法用于获取数据的类型。 - //它接收一个Uri参数，根据Uri的不同返回相应的MIME类型。 - //MIME类型用于标识数据的类型，通常用于内容解析和数据传输。 - @Override - public String getType(Uri uri) { - // TODO Auto-generated method stub - return null; - } - -}