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data代码注释

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pull/1/head
Wang-YYu-Lu 2 months ago
parent 2a1944a9aa
commit 779540e963
4 changed files with 506 additions and 345 deletions
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31
src/Notes-master/src/net/micode/notes/data/Contact.java
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@ -14,8 +14,10 @@
* limitations under the License. * limitations under the License.
*/ */
// 定义联系人相关操作的类，位于小米便签的数据模块
package net.micode.notes.data; package net.micode.notes.data;
// 导入所需的Android和Java库
import android.content.Context; import android.content.Context;
import android.database.Cursor; import android.database.Cursor;
import android.provider.ContactsContract.CommonDataKinds.Phone; import android.provider.ContactsContract.CommonDataKinds.Phone;
@ -25,28 +27,45 @@ import android.util.Log;
import java.util.HashMap; import java.util.HashMap;
// 联系人工具类，用于通过电话号码获取联系人信息
public class Contact { public class Contact {
// 缓存联系人信息的HashMap，提高查询效率
private static HashMap<String, String> sContactCache; private static HashMap<String, String> sContactCache;
// 日志标签
private static final String TAG = "Contact"; private static final String TAG = "Contact";
// 查询联系人信息的SQL选择语句模板
// 用于匹配电话号码和获取联系人姓名
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 "
+ "(SELECT raw_contact_id " + "(SELECT raw_contact_id "
+ " FROM phone_lookup" + " FROM phone_lookup"
+ " WHERE min_match = '+')"; + " WHERE min_match = '+')";
/**
* 根据电话号码获取联系人姓名
* @param context Android上下文对象
* @param phoneNumber 要查询的电话号码
* @return 联系人姓名，如果找不到则返回null
*/
public static String getContact(Context context, String phoneNumber) { public static String getContact(Context context, String phoneNumber) {
// 如果缓存未初始化，则初始化缓存
if(sContactCache == null) { if(sContactCache == null) {
sContactCache = new HashMap<String, String>(); sContactCache = new HashMap<String, String>();
} }
// 先检查缓存中是否已有该号码对应的联系人
if(sContactCache.containsKey(phoneNumber)) { if(sContactCache.containsKey(phoneNumber)) {
return sContactCache.get(phoneNumber); return sContactCache.get(phoneNumber);
} }
// 准备查询语句，替换最小匹配参数
String selection = CALLER_ID_SELECTION.replace("+", String selection = CALLER_ID_SELECTION.replace("+",
PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)); PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
// 查询联系人数据库
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 },
@ -54,20 +73,26 @@ public class Contact {
new String[] { phoneNumber }, new String[] { phoneNumber },
null); null);
// 处理查询结果
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);
// 将结果存入缓存
sContactCache.put(phoneNumber, name); sContactCache.put(phoneNumber, name);
return name; return name;
} catch (IndexOutOfBoundsException e) { } catch (IndexOutOfBoundsException e) {
// 处理数据越界异常
Log.e(TAG, " Cursor get string error " + e.toString()); Log.e(TAG, " Cursor get string error " + e.toString());
return null; return null;
} finally { } finally {
// 确保关闭Cursor释放资源
cursor.close(); cursor.close();
} }
} else { } else {
// 没有找到匹配的联系人
Log.d(TAG, "No contact matched with number:" + phoneNumber); Log.d(TAG, "No contact matched with number:" + phoneNumber);
return null; return null;
} }
} }
} }

219
src/Notes-master/src/net/micode/notes/data/Notes.java
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@ -14,266 +14,277 @@
* limitations under the License. * limitations under the License.
*/ */
// 定义便签应用的核心常量、URI和数据结构
package net.micode.notes.data; package net.micode.notes.data;
// 导入Android Uri类
import android.net.Uri; import android.net.Uri;
// 便签应用的核心常量类，包含数据类型、URI和列定义
public class Notes { public class Notes {
// ContentProvider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; // 便签类型常量
public static final int TYPE_SYSTEM = 2; public static final int TYPE_NOTE = 0; // 普通便签类型
public static final int TYPE_FOLDER = 1; // 文件夹类型
public static final int TYPE_SYSTEM = 2; // 系统文件夹类型
/** /**
* Following IDs are system folders' identifiers * 系统文件夹的标识符常量
* {@link Notes#ID_ROOT_FOLDER } is default folder * {@link Notes#ID_ROOT_FOLDER } 是默认根文件夹
* {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder * {@link Notes#ID_TEMPARAY_FOLDER } 用于存放无文件夹的便签
* {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records * {@link Notes#ID_CALL_RECORD_FOLDER} 用于存储通话记录
*/ */
public static final int ID_ROOT_FOLDER = 0; public static final int ID_ROOT_FOLDER = 0; // 根文件夹ID
public static final int ID_TEMPARAY_FOLDER = -1; public static final int ID_TEMPARAY_FOLDER = -1; // 临时文件夹ID
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ID
public static final int ID_TRASH_FOLER = -3; public static final int ID_TRASH_FOLER = -3; // 回收站文件夹ID
public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date"; // Intent附加数据键名常量
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; // 小部件类型常量
public static final int TYPE_WIDGET_4X = 1; public static final int TYPE_WIDGET_INVALIDE = -1; // 无效小部件类型
public static final int TYPE_WIDGET_2X = 0; // 2x大小的小部件
public static final int TYPE_WIDGET_4X = 1; // 4x大小的小部件
// 数据类型的常量定义
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; // 文本便签类型
public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; // 通话记录便签类型
} }
/** /**
* Uri to query all notes and folders * 查询所有便签和文件夹的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 * 查询便签数据的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");
// 便签表的列定义接口
public interface NoteColumns { public interface NoteColumns {
/** /**
* The unique ID for a row * 行的唯一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 * 便签或文件夹的父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 * 便签或文件夹的创建日期
* <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 * 最后修改日期
* <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 * 文件夹名称或便签的文本内容摘要
* <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 * 便签关联的小部件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 * 便签关联的小部件类型
* <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 * 便签背景颜色的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 * 是否有附件：文本便签没有附件，多媒体便签至少有一个附件
* 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 * 文件夹中的便签数量
* <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：文件夹或便签
* <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 * 本地修改标志
* <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 * Google Task 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 * 版本号
* <P> Type : INTEGER (long) </P> * <P> 类型 : INTEGER (long) </P>
*/ */
public static final String VERSION = "version"; public static final String VERSION = "version";
} }
// 数据表的列定义接口
public interface DataColumns { public interface DataColumns {
/** /**
* The unique ID for a row * 行的唯一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. * 该行数据项的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 * 该数据所属便签的引用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 * 数据项的创建日期
* <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 * 最后修改日期
* <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1，具体含义由{@link #MIMETYPE}决定，用于整数类型
* integer data type * <P> 类型: INTEGER </P>
* <P> Type: 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2，具体含义由{@link #MIMETYPE}决定，用于整数类型
* integer data type * <P> 类型: INTEGER </P>
* <P> Type: 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3，具体含义由{@link #MIMETYPE}决定，用于文本类型
* TEXT data type * <P> 类型: TEXT </P>
* <P> Type: 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4，具体含义由{@link #MIMETYPE}决定，用于文本类型
* TEXT data type * <P> 类型: TEXT </P>
* <P> Type: 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5，具体含义由{@link #MIMETYPE}决定，用于文本类型
* TEXT data type * <P> 类型: TEXT </P>
* <P> Type: TEXT </P>
*/ */
public static final String DATA5 = "data5"; public static final String DATA5 = "data5";
} }
// 文本便签的数据列定义
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 * 模式标志：是否为清单模式
* <P> Type: Integer 1:check list mode 0: normal mode </P> * <P> 类型: Integer 1:清单模式 0:普通模式 </P>
*/ */
public static final String MODE = DATA1; public static final String MODE = DATA1;
// 清单模式常量
public static final int MODE_CHECK_LIST = 1; public static final int MODE_CHECK_LIST = 1;
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note"; // 文本便签的MIME类型
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note"; // 多项目类型
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"; // 单项目类型
// 文本便签的URI
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note"); public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
} }
// 通话记录便签的数据列定义
public static final class CallNote implements DataColumns { public static final class CallNote implements DataColumns {
/** /**
* Call date for this record * 通话记录日期
* <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 * 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"; // 通话记录便签的MIME类型
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note"; // 多项目类型
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"; // 单项目类型
// 通话记录便签的URI
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note"); public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
} }
} }

365
src/Notes-master/src/net/micode/notes/data/NotesDatabaseHelper.java
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@ -14,210 +14,230 @@
* limitations under the License. * limitations under the License.
*/ */
// 数据库帮助类，负责创建和维护便签应用的数据库
package net.micode.notes.data; package net.micode.notes.data;
// 导入所需的Android类
import android.content.ContentValues; import android.content.ContentValues;
import android.content.Context; import android.content.Context;
import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper; import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log; import android.util.Log;
// 导入便签数据相关的常量定义
import net.micode.notes.data.Notes.DataColumns; import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.DataConstants; import net.micode.notes.data.Notes.DataConstants;
import net.micode.notes.data.Notes.NoteColumns; import net.micode.notes.data.Notes.NoteColumns;
// 数据库帮助类，继承自SQLiteOpenHelper
public class NotesDatabaseHelper extends SQLiteOpenHelper { public class NotesDatabaseHelper extends SQLiteOpenHelper {
// 数据库名称常量
private static final String DB_NAME = "note.db"; private static final String DB_NAME = "note.db";
// 当前数据库版本号
private static final int DB_VERSION = 4; private static final int DB_VERSION = 4;
// 数据库表名定义接口
public interface TABLE { public interface TABLE {
public static final String NOTE = "note"; public static final String NOTE = "note"; // 便签表名
public static final String DATA = "data"; // 数据表名
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;
// 创建便签表的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," + // 主键ID
NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + // 父ID，默认为0
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," + // 便签数量
NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," + // 内容摘要
NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," + // 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ID
NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + // Google任务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," + // 主键ID
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," + // 关联的便签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," + // 通用数据列1
DataColumns.DATA2 + " INTEGER," + DataColumns.DATA2 + " INTEGER," + // 通用数据列2
DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + // 通用数据列3
DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + // 通用数据列4
DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + // 通用数据列5
")"; ")";
// 创建数据表note_id索引的SQL语句
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 + ");";
/** /**
* Increase folder's note count when move note to the folder * 触发器：当更新便签的父ID时，增加目标文件夹的便签计数
*/ */
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 +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END"; " END";
/** /**
* Decrease folder's note count when move note from folder * 触发器：当更新便签的父ID时，减少原文件夹的便签计数
*/ */
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 +
" BEGIN " + " BEGIN " +
" UPDATE " + TABLE.NOTE + " UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" + " AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
" END"; " END";
/** /**
* Increase folder's note count when insert new note to the folder * 触发器：当插入新便签时，增加父文件夹的便签计数
*/ */
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 +
" BEGIN " + " BEGIN " +
" UPDATE " + TABLE.NOTE + " UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END"; " END";
/** /**
* Decrease folder's note count when delete note from the folder * 触发器：当删除便签时，减少父文件夹的便签计数
*/ */
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 +
" BEGIN " + " BEGIN " +
" UPDATE " + TABLE.NOTE + " UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
" AND " + NoteColumns.NOTES_COUNT + ">0;" + " AND " + NoteColumns.NOTES_COUNT + ">0;" +
" END"; " END";
/** /**
* Update note's content when insert data with type {@link DataConstants#NOTE} * 触发器：当插入类型为NOTE的数据时，更新便签的内容摘要
*/ */
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 +
" WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
" BEGIN" + " BEGIN" +
" UPDATE " + TABLE.NOTE + " UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" END"; " END";
/** /**
* Update note's content when data with {@link DataConstants#NOTE} type has changed * 触发器：当更新类型为NOTE的数据时，更新便签的内容摘要
*/ */
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 +
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
" BEGIN" + " BEGIN" +
" UPDATE " + TABLE.NOTE + " UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" END"; " END";
/** /**
* Update note's content when data with {@link DataConstants#NOTE} type has deleted * 触发器：当删除类型为NOTE的数据时，清空便签的内容摘要
*/ */
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 +
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" + " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
" BEGIN" + " BEGIN" +
" UPDATE " + TABLE.NOTE + " UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.SNIPPET + "=''" + " SET " + NoteColumns.SNIPPET + "=''" +
" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" + " WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
" END"; " END";
/** /**
* Delete datas belong to note which has been deleted * 触发器：当删除便签时，自动删除关联的数据
*/ */
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 +
" BEGIN" + " BEGIN" +
" DELETE FROM " + TABLE.DATA + " DELETE FROM " + TABLE.DATA +
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" + " WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
" END"; " END";
/** /**
* Delete notes belong to folder which has been deleted * 触发器：当删除文件夹时，自动删除该文件夹下的所有便签
*/ */
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 +
" BEGIN" + " BEGIN" +
" DELETE FROM " + TABLE.NOTE + " DELETE FROM " + TABLE.NOTE +
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END"; " END";
/** /**
* Move notes belong to folder which has been moved to trash folder * 触发器：当文件夹被移动到回收站时，将其下的便签也移动到回收站
*/ */
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 +
" WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER + " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
" BEGIN" + " BEGIN" +
" UPDATE " + TABLE.NOTE + " UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER + " SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END"; " END";
// 构造函数
public NotesDatabaseHelper(Context context) { public NotesDatabaseHelper(Context context) {
super(context, DB_NAME, null, DB_VERSION); super(context, DB_NAME, null, DB_VERSION);
} }
/**
* 创建便签表
* @param db SQLiteDatabase对象
*/
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SQL
reCreateNoteTableTriggers(db); reCreateNoteTableTriggers(db); // 重建触发器
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");
} }
/**
* 重建便签表相关的触发器
* @param db SQLiteDatabase对象
*/
private void reCreateNoteTableTriggers(SQLiteDatabase db) { private void reCreateNoteTableTriggers(SQLiteDatabase db) {
// 删除所有现有的触发器
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update"); 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_update");
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete"); db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
@ -226,6 +246,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete"); db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash"); db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
// 重新创建所有触发器
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);
@ -235,18 +256,22 @@ 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
* @param db SQLiteDatabase对象
*/
private void createSystemFolder(SQLiteDatabase db) { private void createSystemFolder(SQLiteDatabase db) {
ContentValues values = new ContentValues(); ContentValues values = new ContentValues();
/** /**
* call record foler for call notes * 创建通话记录文件夹
*/ */
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);
/** /**
* root folder which is default folder * 创建根文件夹
*/ */
values.clear(); values.clear();
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER); values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
@ -254,7 +279,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values);
/** /**
* temporary folder which is used for moving note * 创建临时文件夹（用于移动便签时临时存放）
*/ */
values.clear(); values.clear();
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER); values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
@ -262,7 +287,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values);
/** /**
* create trash folder * 创建回收站文件夹
*/ */
values.clear(); values.clear();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
@ -270,23 +295,38 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.insert(TABLE.NOTE, null, values); db.insert(TABLE.NOTE, null, values);
} }
/**
* 创建数据表
* @param db SQLiteDatabase对象
*/
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SQL
reCreateDataTableTriggers(db); reCreateDataTableTriggers(db); // 重建触发器
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");
} }
/**
* 重建数据表相关的触发器
* @param db SQLiteDatabase对象
*/
private void reCreateDataTableTriggers(SQLiteDatabase db) { private void reCreateDataTableTriggers(SQLiteDatabase db) {
// 删除所有现有的触发器
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert"); db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update"); db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete"); db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
// 重新创建所有触发器
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);
} }
/**
* 获取单例实例
* @param context 上下文对象
* @return NotesDatabaseHelper实例
*/
static synchronized NotesDatabaseHelper getInstance(Context context) { static synchronized NotesDatabaseHelper getInstance(Context context) {
if (mInstance == null) { if (mInstance == null) {
mInstance = new NotesDatabaseHelper(context); mInstance = new NotesDatabaseHelper(context);
@ -294,69 +334,98 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
return mInstance; return mInstance;
} }
/**
* 创建数据库时调用
* @param db SQLiteDatabase对象
*/
@Override @Override
public void onCreate(SQLiteDatabase db) { public void onCreate(SQLiteDatabase db) {
createNoteTable(db); createNoteTable(db); // 创建便签表
createDataTable(db); createDataTable(db); // 创建数据表
} }
/**
* 升级数据库时调用
* @param db SQLiteDatabase对象
* @param oldVersion 旧版本号
* @param newVersion 新版本号
*/
@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; // 是否需要重建触发器
boolean skipV2 = false; boolean skipV2 = false; // 是否跳过V2升级
// 从V1升级到V2
if (oldVersion == 1) { if (oldVersion == 1) {
upgradeToV2(db); upgradeToV2(db);
skipV2 = true; // this upgrade including the upgrade from v2 to v3 skipV2 = true; // 这个升级包含从V2到V3的升级
oldVersion++; oldVersion++;
} }
// 从V2升级到V3
if (oldVersion == 2 && !skipV2) { if (oldVersion == 2 && !skipV2) {
upgradeToV3(db); upgradeToV3(db);
reCreateTriggers = true; reCreateTriggers = true;
oldVersion++; oldVersion++;
} }
// 从V3升级到V4
if (oldVersion == 3) { if (oldVersion == 3) {
upgradeToV4(db); upgradeToV4(db);
oldVersion++; oldVersion++;
} }
// 如果需要，重建触发器
if (reCreateTriggers) { if (reCreateTriggers) {
reCreateNoteTableTriggers(db); reCreateNoteTableTriggers(db);
reCreateDataTableTriggers(db); reCreateDataTableTriggers(db);
} }
// 检查版本号是否匹配
if (oldVersion != newVersion) { if (oldVersion != newVersion) {
throw new IllegalStateException("Upgrade notes database to version " + newVersion throw new IllegalStateException("Upgrade notes database to version " + newVersion
+ "fails"); + "fails");
} }
} }
/**
* 升级到V2版本：重建所有表
* @param db SQLiteDatabase对象
*/
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); // 删除便签表
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); // 重新创建便签表
createDataTable(db); createDataTable(db); // 重新创建数据表
} }
/**
* 升级到V3版本：添加GTASK_ID列和回收站文件夹
* @param db SQLiteDatabase对象
*/
private void upgradeToV3(SQLiteDatabase db) { private void upgradeToV3(SQLiteDatabase db) {
// drop unused triggers // 删除不再使用的触发器
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert"); db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_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
// 添加GTASK_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
// 添加回收站系统文件夹
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);
} }
/**
* 升级到V4版本：添加VERSION列
* @param db SQLiteDatabase对象
*/
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");
} }
} }

236
src/Notes-master/src/net/micode/notes/data/NotesProvider.java
Unescape View File

@ -14,9 +14,10 @@
* limitations under the License. * limitations under the License.
*/ */
// 便签内容提供者，负责处理便签数据的CRUD操作
package net.micode.notes.data; package net.micode.notes.data;
// 导入所需的Android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;
@ -29,174 +30,206 @@ import android.net.Uri;
import android.text.TextUtils; import android.text.TextUtils;
import android.util.Log; import android.util.Log;
// 导入应用资源和数据定义
import net.micode.notes.R; import net.micode.notes.R;
import net.micode.notes.data.Notes.DataColumns; 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;
// 便签内容提供者类，继承自ContentProvider
public class NotesProvider extends ContentProvider { public class NotesProvider extends ContentProvider {
// URI匹配器，用于匹配不同的URI请求
private static final UriMatcher mMatcher; private static final UriMatcher mMatcher;
// 数据库帮助类实例
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; // URI匹配常量定义
private static final int URI_NOTE_ITEM = 2; private static final int URI_NOTE = 1; // 便签表URI
private static final int URI_DATA = 3; private static final int URI_NOTE_ITEM = 2; // 单个便签URI
private static final int URI_DATA_ITEM = 4; private static final int URI_DATA = 3; // 数据表URI
private static final int URI_DATA_ITEM = 4; // 单个数据项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
// 静态初始化块，配置URI匹配器
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); // 匹配便签表
mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM); mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM); // 匹配单个便签
mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA); mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA); // 匹配数据表
mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM); mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM); // 匹配单个数据项
mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH); mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH); // 匹配搜索
mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST); mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST); // 匹配搜索建议
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
} }
/** /**
* x'0A' represents the '\n' character in sqlite. For title and content in the search result, * 搜索投影字段定义：
* we will trim '\n' and white space in order to show more information. * x'0A'在SQLite中代表换行符'\n'。对于搜索结果中的标题和内容，
* 我们将去除'\n'和空格以显示更多信息。
*/ */
private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + "," private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + "," // 便签ID
+ NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + "," + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + "," // 建议项额外数据
+ "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + "," + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + "," // 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 + "," // 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 + "," // 建议图标
+ "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + "," + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + "," // 建议动作
+ "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA; + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA; // 建议数据
// 便签片段搜索查询SQL
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 // 从便签表查询
+ " WHERE " + NoteColumns.SNIPPET + " LIKE ?" + " WHERE " + NoteColumns.SNIPPET + " LIKE ?" // 按片段匹配
+ " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER // 排除回收站中的便签
+ " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE; + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE; // 只查询普通便签类型
/**
* 创建内容提供者时调用
* @return 是否成功创建
*/
@Override @Override
public boolean onCreate() { public boolean onCreate() {
mHelper = NotesDatabaseHelper.getInstance(getContext()); mHelper = NotesDatabaseHelper.getInstance(getContext()); // 获取数据库帮助类实例
return true; return true;
} }
/**
* 查询方法
* @param uri 请求的URI
* @param projection 要返回的列
* @param selection 选择条件
* @param selectionArgs 选择参数
* @param sortOrder 排序方式
* @return 查询结果的Cursor
*/
@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) {
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;
switch (mMatcher.match(uri)) { switch (mMatcher.match(uri)) { // 根据URI匹配不同操作
case URI_NOTE: case URI_NOTE: // 查询便签表
c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null, c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
sortOrder); sortOrder);
break; break;
case URI_NOTE_ITEM: case URI_NOTE_ITEM: // 查询单个便签
id = uri.getPathSegments().get(1); id = uri.getPathSegments().get(1);
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: // 查询数据表
c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null, c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
sortOrder); sortOrder);
break; break;
case URI_DATA_ITEM: case URI_DATA_ITEM: // 查询单个数据项
id = uri.getPathSegments().get(1); id = uri.getPathSegments().get(1);
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: // 搜索请求
case URI_SEARCH_SUGGEST: case URI_SEARCH_SUGGEST: // 搜索建议请求
if (sortOrder != null || projection != null) { if (sortOrder != null || projection != null) {
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) { // 处理搜索建议请求
if (uri.getPathSegments().size() > 1) { if (uri.getPathSegments().size() > 1) {
searchString = uri.getPathSegments().get(1); searchString = uri.getPathSegments().get(1);
} }
} else { } else { // 处理普通搜索请求
searchString = uri.getQueryParameter("pattern"); searchString = uri.getQueryParameter("pattern");
} }
if (TextUtils.isEmpty(searchString)) { if (TextUtils.isEmpty(searchString)) { // 搜索字符串为空则返回null
return null; return null;
} }
try { try {
searchString = String.format("%%%s%%", searchString); searchString = String.format("%%%s%%", searchString); // 格式化搜索字符串
c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY, c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY, // 执行原始查询
new String[] { searchString }); new String[] { searchString });
} 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:
throw new IllegalArgumentException("Unknown URI " + uri); throw new IllegalArgumentException("Unknown URI " + uri); // 未知URI抛出异常
} }
if (c != null) { if (c != null) {
c.setNotificationUri(getContext().getContentResolver(), uri); c.setNotificationUri(getContext().getContentResolver(), uri); // 设置通知URI
} }
return c; return c;
} }
/**
* 插入方法
* @param uri 请求的URI
* @param values 要插入的值
* @return 新插入项的URI
*/
@Override @Override
public Uri insert(Uri uri, ContentValues values) { public Uri insert(Uri uri, ContentValues values) {
SQLiteDatabase db = mHelper.getWritableDatabase(); SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写数据库
long dataId = 0, noteId = 0, insertedId = 0; long dataId = 0, noteId = 0, insertedId = 0;
switch (mMatcher.match(uri)) { switch (mMatcher.match(uri)) { // 根据URI匹配不同操作
case URI_NOTE: case URI_NOTE: // 插入便签
insertedId = noteId = db.insert(TABLE.NOTE, null, values); insertedId = noteId = db.insert(TABLE.NOTE, null, values);
break; break;
case URI_DATA: case URI_DATA: // 插入数据
if (values.containsKey(DataColumns.NOTE_ID)) { if (values.containsKey(DataColumns.NOTE_ID)) { // 检查是否包含便签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()); // 记录格式错误
} }
insertedId = dataId = db.insert(TABLE.DATA, null, values); insertedId = dataId = db.insert(TABLE.DATA, null, values);
break; break;
default: default:
throw new IllegalArgumentException("Unknown URI " + uri); throw new IllegalArgumentException("Unknown URI " + uri); // 未知URI抛出异常
} }
// Notify the note uri // 通知便签URI变化
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 // 通知数据URI变化
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
} }
/**
* 删除方法
* @param uri 请求的URI
* @param selection 选择条件
* @param selectionArgs 选择参数
* @return 删除的行数
*/
@Override @Override
public int delete(Uri uri, String selection, String[] selectionArgs) { public int delete(Uri uri, String selection, String[] selectionArgs) {
int count = 0; int count = 0;
String id = null; String id = null;
SQLiteDatabase db = mHelper.getWritableDatabase(); SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写数据库
boolean deleteData = false; boolean deleteData = false;
switch (mMatcher.match(uri)) { switch (mMatcher.match(uri)) { // 根据URI匹配不同操作
case URI_NOTE: case URI_NOTE: // 删除便签
selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 "; selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 "; // 只允许删除ID大于0的便签
count = db.delete(TABLE.NOTE, selection, selectionArgs); count = db.delete(TABLE.NOTE, selection, selectionArgs);
break; break;
case URI_NOTE_ITEM: case URI_NOTE_ITEM: // 删除单个便签
id = uri.getPathSegments().get(1); id = uri.getPathSegments().get(1);
/** /**
* ID that smaller than 0 is system folder which is not allowed to * ID小于0的是系统文件夹，不允许删除
* trash
*/ */
long noteId = Long.valueOf(id); long noteId = Long.valueOf(id);
if (noteId <= 0) { if (noteId <= 0) {
@ -205,101 +238,124 @@ public class NotesProvider extends ContentProvider {
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: // 删除数据
count = db.delete(TABLE.DATA, selection, selectionArgs); count = db.delete(TABLE.DATA, selection, selectionArgs);
deleteData = true; deleteData = true;
break; break;
case URI_DATA_ITEM: case URI_DATA_ITEM: // 删除单个数据项
id = uri.getPathSegments().get(1); id = uri.getPathSegments().get(1);
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;
break; break;
default: default:
throw new IllegalArgumentException("Unknown URI " + uri); throw new IllegalArgumentException("Unknown URI " + uri); // 未知URI抛出异常
} }
if (count > 0) { if (count > 0) { // 如果删除了数据
if (deleteData) { if (deleteData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); // 通知便签URI变化
} }
getContext().getContentResolver().notifyChange(uri, null); getContext().getContentResolver().notifyChange(uri, null); // 通知当前URI变化
} }
return count; return count;
} }
/**
* 更新方法
* @param uri 请求的URI
* @param values 要更新的值
* @param selection 选择条件
* @param selectionArgs 选择参数
* @return 更新的行数
*/
@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; int count = 0;
String id = null; String id = null;
SQLiteDatabase db = mHelper.getWritableDatabase(); SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写数据库
boolean updateData = false; boolean updateData = false;
switch (mMatcher.match(uri)) { switch (mMatcher.match(uri)) { // 根据URI匹配不同操作
case URI_NOTE: case URI_NOTE: // 更新便签
increaseNoteVersion(-1, selection, selectionArgs); increaseNoteVersion(-1, selection, selectionArgs); // 增加便签版本
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: // 更新单个便签
id = uri.getPathSegments().get(1); id = uri.getPathSegments().get(1);
increaseNoteVersion(Long.valueOf(id), selection, selectionArgs); increaseNoteVersion(Long.valueOf(id), selection, selectionArgs); // 增加便签版本
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: // 更新数据
count = db.update(TABLE.DATA, values, selection, selectionArgs); count = db.update(TABLE.DATA, values, selection, selectionArgs);
updateData = true; updateData = true;
break; break;
case URI_DATA_ITEM: case URI_DATA_ITEM: // 更新单个数据项
id = uri.getPathSegments().get(1); id = uri.getPathSegments().get(1);
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;
break; break;
default: default:
throw new IllegalArgumentException("Unknown URI " + uri); throw new IllegalArgumentException("Unknown URI " + uri); // 未知URI抛出异常
} }
if (count > 0) { if (count > 0) { // 如果更新了数据
if (updateData) { if (updateData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); // 通知便签URI变化
} }
getContext().getContentResolver().notifyChange(uri, null); getContext().getContentResolver().notifyChange(uri, null); // 通知当前URI变化
} }
return count; return count;
} }
/**
* 解析选择条件，添加AND连接符
* @param selection 原始选择条件
* @return 解析后的选择条件
*/
private String parseSelection(String selection) { private String parseSelection(String selection) {
return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""); return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
} }
/**
* 增加便签版本号
* @param id 便签ID，-1表示不指定
* @param selection 选择条件
* @param selectionArgs 选择参数
*/
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 "); // 版本号加1
if (id > 0 || !TextUtils.isEmpty(selection)) { if (id > 0 || !TextUtils.isEmpty(selection)) { // 如果有ID或选择条件
sql.append(" WHERE "); sql.append(" WHERE ");
} }
if (id > 0) { if (id > 0) { // 如果指定了ID
sql.append(NoteColumns.ID + "=" + String.valueOf(id)); sql.append(NoteColumns.ID + "=" + String.valueOf(id));
} }
if (!TextUtils.isEmpty(selection)) { if (!TextUtils.isEmpty(selection)) { // 如果有选择条件
String selectString = id > 0 ? parseSelection(selection) : selection; String selectString = id > 0 ? parseSelection(selection) : selection;
for (String args : selectionArgs) { for (String args : selectionArgs) { // 替换参数
selectString = selectString.replaceFirst("\\?", args); selectString = selectString.replaceFirst("\\?", args);
} }
sql.append(selectString); sql.append(selectString);
} }
mHelper.getWritableDatabase().execSQL(sql.toString()); mHelper.getWritableDatabase().execSQL(sql.toString()); // 执行SQL
} }
/**
* 获取URI对应的MIME类型
* @param uri 请求的URI
* @return MIME类型字符串
*/
@Override @Override
public String getType(Uri uri) { public String getType(Uri uri) {
// TODO Auto-generated method stub // TODO Auto-generated method stub
return null; return null;
} }
}
}
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