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@ -7,7 +7,7 @@
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* Unless required by law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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@ -28,196 +28,245 @@ import net.micode.notes.data.Notes.NoteColumns;
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public class NotesDatabaseHelper extends SQLiteOpenHelper {
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// 数据库的名称，将被存储在设备存储中
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private static final String DB_NAME = "note.db";
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// 数据库的版本号，用于控制数据库的结构升级
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private static final int DB_VERSION = 4;
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public interface TABLE {
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// 表示存储笔记信息的表名
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public static final String NOTE = "note";
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// 表示存储笔记相关数据信息的表名
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public static final String DATA = "data";
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}
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private static final String TAG = "NotesDatabaseHelper";
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// 单例模式的实例，保证在应用中只存在一个数据库帮助类的实例
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private static NotesDatabaseHelper mInstance;
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// 创建笔记表的 SQL 语句
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private static final String CREATE_NOTE_TABLE_SQL =
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"CREATE TABLE " + TABLE.NOTE + "(" +
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NoteColumns.ID + " INTEGER PRIMARY KEY," +
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NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
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NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
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NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
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NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
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")";
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"CREATE TABLE " + TABLE.NOTE + "(" +
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// 笔记的唯一标识符，主键，自动递增
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NoteColumns.ID + " INTEGER PRIMARY KEY," +
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// 笔记所属父级的 ID，默认为 0，表示没有父级
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NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 笔记的提醒日期，默认为 0，表示没有设置提醒
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NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
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// 笔记的背景颜色 ID，默认为 0，可能对应某种颜色的编码
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NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 笔记的创建日期，使用 strftime 函数获取当前时间戳并乘以 1000，转换为毫秒级
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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// 表示笔记是否包含附件，默认为 0，表示没有附件
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NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
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// 笔记的最后修改日期，使用 strftime 函数获取当前时间戳并乘以 1000，转换为毫秒级
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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// 文件夹中笔记的数量，默认为 0
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NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
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// 笔记的摘要信息，默认为空字符串
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NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
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// 笔记的类型，默认为 0，可能代表不同类型的笔记，如普通笔记、文件夹等
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NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
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// 笔记关联的部件 ID，默认为 0
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NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 笔记部件的类型，默认为 -1，可能代表不同类型的部件
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NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
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// 笔记的同步 ID，默认为 0，用于数据同步
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NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 表示笔记是否在本地修改，默认为 0，表示未修改
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NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
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// 笔记的原始父级 ID，默认为 0
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NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 可能是用于 Google 任务的 ID，默认为空字符串
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NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
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// 笔记的版本号，默认为 0
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NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
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")";
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// 创建数据表的 SQL 语句
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private static final String CREATE_DATA_TABLE_SQL =
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"CREATE TABLE " + TABLE.DATA + "(" +
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DataColumns.ID + " INTEGER PRIMARY KEY," +
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DataColumns.MIME_TYPE + " TEXT NOT NULL," +
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DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA1 + " INTEGER," +
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DataColumns.DATA2 + " INTEGER," +
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DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
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")";
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"CREATE TABLE " + TABLE.DATA + "(" +
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// 数据记录的唯一标识符，主键，自动递增
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DataColumns.ID + " INTEGER PRIMARY KEY," +
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// 数据的 MIME 类型，用于区分不同类型的数据，如文本、图片等，不能为空
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DataColumns.MIME_TYPE + " TEXT NOT NULL," +
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// 该数据记录所属笔记的 ID，默认为 0
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DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
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// 数据记录的创建日期，使用 strftime 函数获取当前时间戳并乘以 1000，转换为毫秒级
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NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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// 数据记录的最后修改日期，使用 strftime 函数获取当前时间戳并乘以 1000，转换为毫秒级
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NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
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// 数据记录的内容，默认为空字符串
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DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
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// 通用数据列 1，可存储整数数据，可为空
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DataColumns.DATA1 + " INTEGER," +
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// 通用数据列 2，可存储整数数据，可为空
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DataColumns.DATA2 + " INTEGER," +
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// 通用数据列 3，可存储文本数据，默认为空字符串
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DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
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// 通用数据列 4，可存储文本数据，默认为空字符串
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DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
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// 通用数据列 5，可存储文本数据，默认为空字符串
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DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
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")";
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// 创建一个索引，用于提高基于 NOTE_ID 列的数据查询性能
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private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
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"CREATE INDEX IF NOT EXISTS note_id_index ON " +
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TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
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"CREATE INDEX IF NOT EXISTS note_id_index ON " +
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TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
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/**
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* Increase folder's note count when move note to the folder
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* 当笔记的父级 ID 更新时触发的触发器，用于增加文件夹中的笔记数量
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* 例如，将笔记移动到一个文件夹中时，该文件夹的笔记数量会加 1
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*/
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private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
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"CREATE TRIGGER increase_folder_count_on_update "+
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";
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"CREATE TRIGGER increase_folder_count_on_update "+
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";
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/**
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* Decrease folder's note count when move note from folder
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* 当笔记的父级 ID 更新时触发的触发器，用于减少文件夹中的笔记数量
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* 例如，将笔记从一个文件夹中移走时，该文件夹的笔记数量会减 1，但确保数量不会为负数
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*/
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private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
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"CREATE TRIGGER decrease_folder_count_on_update " +
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
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" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
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" END";
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"CREATE TRIGGER decrease_folder_count_on_update " +
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" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
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" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
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" END";
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/**
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* Increase folder's note count when insert new note to the folder
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* 当插入新笔记时触发的触发器，用于增加文件夹中的笔记数量
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* 新笔记插入到一个文件夹时，该文件夹的笔记数量会加 1
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*/
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private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
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"CREATE TRIGGER increase_folder_count_on_insert " +
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" AFTER INSERT ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";
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"CREATE TRIGGER increase_folder_count_on_insert " +
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" AFTER INSERT ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";
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/**
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* Decrease folder's note count when delete note from the folder
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* 当删除笔记时触发的触发器，用于减少文件夹中的笔记数量
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* 从文件夹中删除笔记时，该文件夹的笔记数量会减 1，但确保数量不会为负数
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*/
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private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
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"CREATE TRIGGER decrease_folder_count_on_delete " +
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" AFTER DELETE ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
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" AND " + NoteColumns.NOTES_COUNT + ">0;" +
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" END";
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"CREATE TRIGGER decrease_folder_count_on_delete " +
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" AFTER DELETE ON " + TABLE.NOTE +
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" BEGIN " +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
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" AND " + NoteColumns.NOTES_COUNT + ">0;" +
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" END";
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/**
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* Update note's content when insert data with type {@link DataConstants#NOTE}
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* 当向数据表插入新数据且数据的 MIME 类型为 {@link DataConstants#NOTE} 时触发的触发器
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* 用于更新相应笔记的内容，将笔记的摘要设置为新插入数据的内容
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*/
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
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"CREATE TRIGGER update_note_content_on_insert " +
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" AFTER INSERT ON " + TABLE.DATA +
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" WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
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" BEGIN" +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" END";
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"CREATE TRIGGER update_note_content_on_insert " +
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" AFTER INSERT ON " + TABLE.DATA +
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" WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
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" BEGIN" +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" END";
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/**
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|
* Update note's content when data with {@link DataConstants#NOTE} type has changed
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|
* 当数据表中数据更新且数据的 MIME 类型为 {@link DataConstants#NOTE} 时触发的触发器
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|
* 用于更新相应笔记的内容，将笔记的摘要设置为更新后数据的内容
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|
*/
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
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"CREATE TRIGGER update_note_content_on_update " +
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" AFTER UPDATE ON " + TABLE.DATA +
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" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
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" BEGIN" +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" END";
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"CREATE TRIGGER update_note_content_on_update " +
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" AFTER UPDATE ON " + TABLE.DATA +
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" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
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" BEGIN" +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" END";
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/**
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* Update note's content when data with {@link DataConstants#NOTE} type has deleted
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* 当数据表中数据删除且数据的 MIME 类型为 {@link DataConstants#NOTE} 时触发的触发器
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* 用于更新相应笔记的内容，将笔记的摘要设置为空字符串
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*/
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
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"CREATE TRIGGER update_note_content_on_delete " +
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" AFTER delete ON " + TABLE.DATA +
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" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
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" BEGIN" +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=''" +
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" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
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" END";
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"CREATE TRIGGER update_note_content_on_delete " +
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" AFTER delete ON " + TABLE.DATA +
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" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
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" BEGIN" +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=''" +
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" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
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" END";
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/**
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* Delete datas belong to note which has been deleted
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|
* 当笔记表中的笔记被删除时触发的触发器
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|
|
* 用于删除该笔记在数据表中关联的数据记录
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|
|
*/
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|
private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
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|
"CREATE TRIGGER delete_data_on_delete " +
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|
|
" AFTER DELETE ON " + TABLE.NOTE +
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|
|
" BEGIN" +
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|
" DELETE FROM " + TABLE.DATA +
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|
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
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|
|
" END";
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|
|
"CREATE TRIGGER delete_data_on_delete " +
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|
|
" AFTER DELETE ON " + TABLE.NOTE +
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|
|
" BEGIN" +
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|
|
" DELETE FROM " + TABLE.DATA +
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|
|
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
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|
|
" END";
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|
|
/**
|
|
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|
|
* Delete notes belong to folder which has been deleted
|
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|
|
* 当笔记表中的文件夹被删除时触发的触发器
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|
|
|
* 用于删除该文件夹下的所有笔记
|
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|
|
|
*/
|
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|
|
private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
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|
|
"CREATE TRIGGER folder_delete_notes_on_delete " +
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|
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|
|
" AFTER DELETE ON " + TABLE.NOTE +
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|
|
" BEGIN" +
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|
|
" DELETE FROM " + TABLE.NOTE +
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|
|
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
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|
|
" END";
|
|
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|
|
"CREATE TRIGGER folder_delete_notes_on_delete " +
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|
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|
|
" AFTER DELETE ON " + TABLE.NOTE +
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|
|
" BEGIN" +
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|
|
" DELETE FROM " + TABLE.NOTE +
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|
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|
|
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
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|
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|
|
" END";
|
|
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|
|
|
|
|
|
|
/**
|
|
|
|
|
* Move notes belong to folder which has been moved to trash folder
|
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|
|
|
* 当笔记表中的文件夹被移动到回收站文件夹时触发的触发器
|
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|
|
|
* 将该文件夹下的所有笔记的父级 ID 更新为回收站文件夹的 ID
|
|
|
|
|
*/
|
|
|
|
|
private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
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|
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|
|
"CREATE TRIGGER folder_move_notes_on_trash " +
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|
|
|
|
" AFTER UPDATE ON " + TABLE.NOTE +
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|
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|
|
" 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";
|
|
|
|
|
"CREATE TRIGGER folder_move_notes_on_trash " +
|
|
|
|
|
" AFTER UPDATE ON " + TABLE.NOTE +
|
|
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|
|
" 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";
|
|
|
|
|
|
|
|
|
|
public NotesDatabaseHelper(Context context) {
|
|
|
|
|
super(context, DB_NAME, null, DB_VERSION);
|
|
|
|
|
}
|
|
|
|
|
|
|
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|
|
// 创建笔记表的方法
|
|
|
|
|
public void createNoteTable(SQLiteDatabase db) {
|
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|
|
|
// 执行创建笔记表的 SQL 语句
|
|
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|
|
db.execSQL(CREATE_NOTE_TABLE_SQL);
|
|
|
|
|
// 重新创建与笔记表相关的触发器
|
|
|
|
|
reCreateNoteTableTriggers(db);
|
|
|
|
|
// 创建系统文件夹
|
|
|
|
|
createSystemFolder(db);
|
|
|
|
|
Log.d(TAG, "note table has been created");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 重新创建与笔记表相关的触发器
|
|
|
|
|
private void reCreateNoteTableTriggers(SQLiteDatabase db) {
|
|
|
|
|
// 删除可能已存在的触发器，避免重复创建或冲突
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
|
|
|
|
|
@ -226,6 +275,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
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|
|
|
db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
|
|
|
|
|
|
|
|
|
|
// 创建触发器
|
|
|
|
|
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
|
|
|
|
|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
|
|
|
|
|
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
|
|
|
|
|
@ -235,18 +285,21 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
|
|
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 创建系统文件夹的方法
|
|
|
|
|
private void createSystemFolder(SQLiteDatabase db) {
|
|
|
|
|
ContentValues values = new ContentValues();
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* call record foler for call notes
|
|
|
|
|
* 创建通话记录文件夹，用于存储通话笔记
|
|
|
|
|
* 将通话记录文件夹的信息存储在 ContentValues 中，并插入到笔记表中
|
|
|
|
|
*/
|
|
|
|
|
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
|
|
|
|
|
* 创建根文件夹，作为默认文件夹
|
|
|
|
|
* 清除 ContentValues 中的数据，存储根文件夹的信息并插入到笔记表中
|
|
|
|
|
*/
|
|
|
|
|
values.clear();
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
|
|
|
|
|
@ -254,7 +307,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* temporary folder which is used for moving note
|
|
|
|
|
* 创建临时文件夹，用于暂存笔记
|
|
|
|
|
* 清除 ContentValues 中的数据，存储临时文件夹的信息并插入到笔记表中
|
|
|
|
|
*/
|
|
|
|
|
values.clear();
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
|
|
|
|
|
@ -262,7 +316,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* create trash folder
|
|
|
|
|
* 创建回收站文件夹
|
|
|
|
|
* 清除 ContentValues 中的数据，存储回收站文件夹的信息并插入到笔记表中
|
|
|
|
|
*/
|
|
|
|
|
values.clear();
|
|
|
|
|
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
|
|
|
|
|
@ -270,23 +325,31 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
|
|
db.insert(TABLE.NOTE, null, values);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 创建数据记录表的方法
|
|
|
|
|
public void createDataTable(SQLiteDatabase db) {
|
|
|
|
|
// 执行创建数据记录表的 SQL 语句
|
|
|
|
|
db.execSQL(CREATE_DATA_TABLE_SQL);
|
|
|
|
|
// 重新创建与数据记录表相关的触发器
|
|
|
|
|
reCreateDataTableTriggers(db);
|
|
|
|
|
// 创建索引，提高数据查询性能
|
|
|
|
|
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
|
|
|
|
|
Log.d(TAG, "data table has been created");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 重新创建与数据记录表相关的触发器
|
|
|
|
|
private void reCreateDataTableTriggers(SQLiteDatabase db) {
|
|
|
|
|
// 删除可能已存在的触发器，避免重复创建或冲突
|
|
|
|
|
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");
|
|
|
|
|
|
|
|
|
|
// 创建触发器
|
|
|
|
|
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);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 获取单例的方法，保证在多线程环境下只创建一个实例
|
|
|
|
|
static synchronized NotesDatabaseHelper getInstance(Context context) {
|
|
|
|
|
if (mInstance == null) {
|
|
|
|
|
mInstance = new NotesDatabaseHelper(context);
|
|
|
|
|
@ -296,6 +359,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
|
|
|
|
|
|
|
@Override
|
|
|
|
|
public void onCreate(SQLiteDatabase db) {
|
|
|
|
|
// 调用创建笔记表和数据记录表的方法
|
|
|
|
|
createNoteTable(db);
|
|
|
|
|
createDataTable(db);
|
|
|
|
|
}
|
|
|
|
|
@ -306,57 +370,68 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
|
|
|
|
|
boolean skipV2 = false;
|
|
|
|
|
|
|
|
|
|
if (oldVersion == 1) {
|
|
|
|
|
// 从版本 1 升级到版本 2 的操作
|
|
|
|
|
upgradeToV2(db);
|
|
|
|
|
skipV2 = true; // this upgrade including the upgrade from v2 to v3
|
|
|
|
|
skipV2 = true; // 标记已完成从版本 2 到版本 3 的部分升级步骤
|
|
|
|
|
oldVersion++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (oldVersion == 2 && !skipV2) {
|
|
|
|
|
if (oldVersion == 2 &&!skipV2) {
|
|
|
|
|
// 从版本 2 升级到版本 3 的操作
|
|
|
|
|
upgradeToV3(db);
|
|
|
|
|
reCreateTriggers = true;
|
|
|
|
|
oldVersion++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (oldVersion == 3) {
|
|
|
|
|
// 从版本 3 升级到版本 4 的操作
|
|
|
|
|
upgradeToV4(db);
|
|
|
|
|
oldVersion++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (reCreateTriggers) {
|
|
|
|
|
// 重新创建触发器，以适应新的数据库结构
|
|
|
|
|
reCreateNoteTableTriggers(db);
|
|
|
|
|
reCreateDataTableTriggers(db);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (oldVersion != newVersion) {
|
|
|
|
|
if (oldVersion!= newVersion) {
|
|
|
|
|
// 若升级未成功，抛出异常
|
|
|
|
|
throw new IllegalStateException("Upgrade notes database to version " + newVersion
|
|
|
|
|
+ "fails");
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 从版本 1 升级到版本 2 的方法
|
|
|
|
|
private void upgradeToV2(SQLiteDatabase db) {
|
|
|
|
|
// 删除旧的笔记表和数据记录表
|
|
|
|
|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
|
|
|
|
|
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
|
|
|
|
|
// 重新创建笔记表和数据记录表
|
|
|
|
|
createNoteTable(db);
|
|
|
|
|
createDataTable(db);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 从版本 2 升级到版本 3 的方法
|
|
|
|
|
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_delete");
|
|
|
|
|
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
|
|
|
|
|
// add a column for gtask id
|
|
|
|
|
// 为笔记表添加新列 GTASK_ID
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db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
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+ " TEXT NOT NULL DEFAULT ''");
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// add a trash system folder
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// 创建回收站系统文件夹
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ContentValues values = new ContentValues();
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values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
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values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
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db.insert(TABLE.NOTE, null, values);
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}
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// 从版本 3 升级到版本 4 的方法
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|
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private void upgradeToV4(SQLiteDatabase db) {
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// 为笔记表添加新列 VERSION
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|
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db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
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|
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+ " INTEGER NOT NULL DEFAULT 0");
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}
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}
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|
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}
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