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@ -16,29 +16,29 @@
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package net.micode.notes.data;
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package net.micode.notes.data;
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import android.content.ContentValues;//就是用于保存一些数据（string boolean byte double float int long short ...）信息，这些信息可以被数据库操作时使用。
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import android.content.ContentValues;//就是用于保存一些数据（string boolean byte double float int long short ...）信息，这些信息可以被数据库操作时使用。
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import android.content.Context;//加载和访问资源。（android中主要是这两个功能，但是这里具体不清楚）
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import android.content.Context;//加载和访问资源。（android中主要是这两个功能，但是这里具体不清楚）
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import android.database.sqlite.SQLiteDatabase;//主要提供了对应于添加、删除、更新、查询的操作方法： insert()、delete()、update()和query()。配合content.values
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import android.database.sqlite.SQLiteDatabase;//主要提供了对应于添加、删除、更新、查询的操作方法： insert()、delete()、update()和query()。配合content.values
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import android.database.sqlite.SQLiteOpenHelper;//用来管理数据的创建和版本更新
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import android.database.sqlite.SQLiteOpenHelper;//用来管理数据的创建和版本更新
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import android.util.Log;
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import android.util.Log;
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import net.micode.notes.data.Notes.DataColumns;
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import net.micode.notes.data.Notes.DataColumns;
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import net.micode.notes.data.Notes.DataConstants;
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import net.micode.notes.data.Notes.DataConstants;
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import net.micode.notes.data.Notes.NoteColumns;
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import net.micode.notes.data.Notes.NoteColumns;
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//数据库操作，用SQLOpenhelper,对一些note和文件进行数据库的操作，比如删除文件后，将文件里的note也相应删除
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//数据库操作，用SQLOpenhelper,对一些note和文件进行数据库的操作，比如删除文件后，将文件里的note也相应删除
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public class NotesDatabaseHelper extends SQLiteOpenHelper {
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public class NotesDatabaseHelper extends SQLiteOpenHelper {
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private static final String DB_NAME = "note.db";
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private static final String DB_NAME = "note.db";
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private static final int DB_VERSION = 4;
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private static final int DB_VERSION = 4;
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public interface TABLE { //接口，分成note和data，在后面的程序里分别使用过
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public interface TABLE { //接口，分成note和data，在后面的程序里分别使用过
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public static final String NOTE = "note";
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public static final String NOTE = "note";
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public static final String DATA = "data";
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public static final String DATA = "data";
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}
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}
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//定义数据库中需要的常量
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//定义数据库中需要的常量
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private static final String TAG = "NotesDatabaseHelper";
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private static final String TAG = "NotesDatabaseHelper";
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private static NotesDatabaseHelper mInstance;
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private static NotesDatabaseHelper mInstance;
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@ -62,7 +62,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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NoteColumns.ORIGIN_PARENT_ID + " 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.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
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NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
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NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
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")";//数据库中需要存储的项目的名称，就相当于创建一个表格的表头的内容。
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")";//数据库中需要存储的项目的名称，就相当于创建一个表格的表头的内容。
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private static final String CREATE_DATA_TABLE_SQL =
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private static final String CREATE_DATA_TABLE_SQL =
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"CREATE TABLE " + TABLE.DATA + "(" +
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"CREATE TABLE " + TABLE.DATA + "(" +
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@ -77,14 +77,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
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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.DATA4 + " TEXT NOT NULL DEFAULT ''," +
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DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
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DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
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")";//和上面的功能一样，主要是存储的项目不同
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")";//和上面的功能一样，主要是存储的项目不同
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private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
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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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"CREATE INDEX IF NOT EXISTS note_id_index ON " +
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TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";//存储便签编号的一个数据表格
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TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";//存储便签编号的一个数据表格
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/**
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/**
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* 将笔记移动到文件夹时增加文件夹的笔记计数
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* 将笔记移动到文件夹时增加文件夹的笔记计数
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*/
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*/
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private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
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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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"CREATE TRIGGER increase_folder_count_on_update "+
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@ -93,10 +93,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" UPDATE " + TABLE.NOTE +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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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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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";//在文件夹中移入一个Note之后需要更改的数据的表格。
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" END";//在文件夹中移入一个Note之后需要更改的数据的表格。
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/**
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/**
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* 从文件夹移动笔记时减少文件夹的笔记计数
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* 从文件夹移动笔记时减少文件夹的笔记计数
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*/
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*/
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private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
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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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"CREATE TRIGGER decrease_folder_count_on_update " +
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@ -106,10 +106,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
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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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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
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" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
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" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
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" END";//在文件夹中移出一个Note之后需要更改的数据的表格。
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" END";//在文件夹中移出一个Note之后需要更改的数据的表格。
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/**
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/**
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* 在文件夹插入新笔记时增加文件夹的笔记计数
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* 在文件夹插入新笔记时增加文件夹的笔记计数
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*/
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*/
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private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
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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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"CREATE TRIGGER increase_folder_count_on_insert " +
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@ -118,10 +118,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" UPDATE " + TABLE.NOTE +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
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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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" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
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" END";//在文件夹中插入一个Note之后需要更改的数据的表格。
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" END";//在文件夹中插入一个Note之后需要更改的数据的表格。
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/**
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/**
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* 从文件夹中删除笔记时减少文件夹的笔记计数
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* 从文件夹中删除笔记时减少文件夹的笔记计数
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*/
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*/
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private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
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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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"CREATE TRIGGER decrease_folder_count_on_delete " +
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@ -131,10 +131,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
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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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" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
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" AND " + NoteColumns.NOTES_COUNT + ">0;" +
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" AND " + NoteColumns.NOTES_COUNT + ">0;" +
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" END";//在文件夹中删除一个Note之后需要更改的数据的表格。
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" END";//在文件夹中删除一个Note之后需要更改的数据的表格。
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/**
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/**
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* 插入类型为 {@link DataConstants#NOTE} 的数据时更新注释的内容
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* 插入类型为 {@link DataConstants#NOTE} 的数据时更新注释的内容
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*/
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*/
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
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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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"CREATE TRIGGER update_note_content_on_insert " +
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@ -144,10 +144,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" UPDATE " + TABLE.NOTE +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
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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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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" END";//在文件夹中对一个Note导入新的数据之后需要更改的数据的表格。
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" END";//在文件夹中对一个Note导入新的数据之后需要更改的数据的表格。
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/**
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/**
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* 当 {@link DataConstants#NOTE} 类型的数据发生更改时更新注释的内容
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* 当 {@link DataConstants#NOTE} 类型的数据发生更改时更新注释的内容
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*/
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*/
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
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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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"CREATE TRIGGER update_note_content_on_update " +
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@ -157,10 +157,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" UPDATE " + TABLE.NOTE +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
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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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" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
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" END";//Note数据被修改后需要更改的数据的表格。
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" END";//Note数据被修改后需要更改的数据的表格。
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/**
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/**
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* 删除 {@link DataConstants#NOTE} 类型的数据时更新注释内容
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* 删除 {@link DataConstants#NOTE} 类型的数据时更新注释内容
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*/
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*/
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private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
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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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"CREATE TRIGGER update_note_content_on_delete " +
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@ -170,10 +170,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" UPDATE " + TABLE.NOTE +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.SNIPPET + "=''" +
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" SET " + NoteColumns.SNIPPET + "=''" +
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" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
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" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
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" END";//Note数据被删除后需要更改的数据的表格。
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" END";//Note数据被删除后需要更改的数据的表格。
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/**
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/**
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* 删除属于已删除的注意事项的数据
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* 删除属于已删除的注意事项的数据
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*/
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*/
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private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
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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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"CREATE TRIGGER delete_data_on_delete " +
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@ -181,10 +181,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" BEGIN" +
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" BEGIN" +
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" DELETE FROM " + TABLE.DATA +
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" DELETE FROM " + TABLE.DATA +
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" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
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" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
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" END";//删除已删除的便签的数据后需要更改的数据的表格。
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" END";//删除已删除的便签的数据后需要更改的数据的表格。
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/**
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/**
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* 删除已删除的文件夹的便签后需要更改的数据的表格
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* 删除已删除的文件夹的便签后需要更改的数据的表格
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*/
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*/
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private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
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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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"CREATE TRIGGER folder_delete_notes_on_delete " +
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@ -192,10 +192,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" BEGIN" +
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" BEGIN" +
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" DELETE FROM " + TABLE.NOTE +
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" DELETE FROM " + TABLE.NOTE +
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" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
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" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
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" END";//删除已删除的文件夹的便签后需要更改的数据的表格。
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" END";//删除已删除的文件夹的便签后需要更改的数据的表格。
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/**
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/**
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* 还原垃圾桶中便签后需要更改的数据的表格
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* 还原垃圾桶中便签后需要更改的数据的表格
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*/
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*/
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private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
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private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
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"CREATE TRIGGER folder_move_notes_on_trash " +
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"CREATE TRIGGER folder_move_notes_on_trash " +
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@ -205,18 +205,18 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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" UPDATE " + TABLE.NOTE +
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" UPDATE " + TABLE.NOTE +
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" SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
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" SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
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" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
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" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
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" END";。
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" END";。
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public NotesDatabaseHelper(Context context) {
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public NotesDatabaseHelper(Context context) {
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super(context, DB_NAME, null, DB_VERSION);
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super(context, DB_NAME, null, DB_VERSION);
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}//构造函数，传入数据库的名称和版本
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}//构造函数，传入数据库的名称和版本
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public void createNoteTable(SQLiteDatabase db) {
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public void createNoteTable(SQLiteDatabase db) {
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db.execSQL(CREATE_NOTE_TABLE_SQL);
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db.execSQL(CREATE_NOTE_TABLE_SQL);
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reCreateNoteTableTriggers(db);
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reCreateNoteTableTriggers(db);
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createSystemFolder(db);
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createSystemFolder(db);
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Log.d(TAG, "note table has been created");
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Log.d(TAG, "note table has been created");
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}//创建表格（用来存储标签属性）
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}//创建表格（用来存储标签属性）
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private void reCreateNoteTableTriggers(SQLiteDatabase db) {
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private void reCreateNoteTableTriggers(SQLiteDatabase db) {
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db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
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db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
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@ -234,21 +234,21 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
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db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
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db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
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db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
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db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
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db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
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}//execSQL是数据库操作的API，主要是更改行为的SQL语句。
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}//execSQL是数据库操作的API，主要是更改行为的SQL语句。
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//在这里主要是用来重新创建上述定义的表格用的，先删除原来有的数据库的触发器再重新创建新的数据库
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//在这里主要是用来重新创建上述定义的表格用的，先删除原来有的数据库的触发器再重新创建新的数据库
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private void createSystemFolder(SQLiteDatabase db) {
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private void createSystemFolder(SQLiteDatabase db) {
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ContentValues values = new ContentValues();
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ContentValues values = new ContentValues();
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/**
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/**
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* 通话记录 Foler，用于通话记录
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* 通话记录 Foler，用于通话记录
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*/
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*/
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values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
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values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
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values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
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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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db.insert(TABLE.NOTE, null, values);
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/**
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/**
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* 根文件夹，即默认文件夹
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* 根文件夹，即默认文件夹
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*/
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*/
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values.clear();
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values.clear();
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values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
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values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
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@ -256,7 +256,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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db.insert(TABLE.NOTE, null, values);
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db.insert(TABLE.NOTE, null, values);
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/**
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/**
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* 用于移动笔记的临时文件夹
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* 用于移动笔记的临时文件夹
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*/
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*/
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values.clear();
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values.clear();
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values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
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values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
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@ -264,20 +264,20 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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db.insert(TABLE.NOTE, null, values);
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db.insert(TABLE.NOTE, null, values);
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/**
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/**
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* 创建垃圾桶文件夹
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* 创建垃圾桶文件夹
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*/
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*/
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values.clear();
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values.clear();
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values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
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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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values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
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db.insert(TABLE.NOTE, null, values);
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db.insert(TABLE.NOTE, null, values);
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}//创建几个系统文件夹
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}//创建几个系统文件夹
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public void createDataTable(SQLiteDatabase db) {
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public void createDataTable(SQLiteDatabase db) {
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db.execSQL(CREATE_DATA_TABLE_SQL);
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db.execSQL(CREATE_DATA_TABLE_SQL);
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reCreateDataTableTriggers(db);
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reCreateDataTableTriggers(db);
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db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
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db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
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Log.d(TAG, "data table has been created");
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Log.d(TAG, "data table has been created");
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}//创建表格（用来存储标签内容）
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}//创建表格（用来存储标签内容）
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private void reCreateDataTableTriggers(SQLiteDatabase db) {
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private void reCreateDataTableTriggers(SQLiteDatabase db) {
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db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
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db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
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@ -287,22 +287,22 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
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db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
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db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
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db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
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db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
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db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
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}//同上面的execSQL
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}//同上面的execSQL
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static synchronized NotesDatabaseHelper getInstance(Context context) {
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static synchronized NotesDatabaseHelper getInstance(Context context) {
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if (mInstance == null) {
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if (mInstance == null) {
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mInstance = new NotesDatabaseHelper(context);
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mInstance = new NotesDatabaseHelper(context);
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}
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}
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return mInstance;
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return mInstance;
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}//上网查是为解决同一时刻只能有一个线程执行.
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}//上网查是为解决同一时刻只能有一个线程执行.
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//在写程序库代码时，有时有一个类需要被所有的其它类使用，
|
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|
|
//在写程序库代码时，有时有一个类需要被所有的其它类使用，
|
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|
|
//但又要求这个类只能被实例化一次，是个服务类，定义一次，其它类使用同一个这个类的实例
|
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|
//但又要求这个类只能被实例化一次，是个服务类，定义一次，其它类使用同一个这个类的实例
|
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@Override
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@Override
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|
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public void onCreate(SQLiteDatabase db) {
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|
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public void onCreate(SQLiteDatabase db) {
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|
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createNoteTable(db);
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createNoteTable(db);
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createDataTable(db);
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createDataTable(db);
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}//实现两个表格（上面创建的两个表格）
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}//实现两个表格（上面创建的两个表格）
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@Override
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@Override
|
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public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
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public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
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@ -311,7 +311,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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|
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if (oldVersion == 1) {
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|
|
if (oldVersion == 1) {
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|
|
upgradeToV2(db);
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|
|
upgradeToV2(db);
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|
|
skipV2 = true; // 此升级包括从 v2 到 v3 的升级
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|
skipV2 = true; // 此升级包括从 v2 到 v3 的升级
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oldVersion++;
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oldVersion++;
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}
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}
|
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@ -335,14 +335,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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throw new IllegalStateException("Upgrade notes database to version " + newVersion
|
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throw new IllegalStateException("Upgrade notes database to version " + newVersion
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+ "fails");
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|
|
+ "fails");
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}
|
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}
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}//数据库版本的更新（数据库内容的更改）
|
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}//数据库版本的更新（数据库内容的更改）
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private void upgradeToV2(SQLiteDatabase db) {
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private void upgradeToV2(SQLiteDatabase db) {
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db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
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db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
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db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
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db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
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createNoteTable(db);
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createNoteTable(db);
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createDataTable(db);
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|
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createDataTable(db);
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}//更新到V2版本
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}//更新到V2版本
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private void upgradeToV3(SQLiteDatabase db) {
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|
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private void upgradeToV3(SQLiteDatabase db) {
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|
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// drop unused triggers
|
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// drop unused triggers
|
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@ -357,10 +357,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
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values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
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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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|
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
|
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|
db.insert(TABLE.NOTE, null, values);
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|
db.insert(TABLE.NOTE, null, values);
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}//更新到V3版本
|
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}//更新到V3版本
|
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private void upgradeToV4(SQLiteDatabase db) {
|
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|
|
private void upgradeToV4(SQLiteDatabase db) {
|
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|
|
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
|
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|
|
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
|
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|
|
+ " INTEGER NOT NULL DEFAULT 0");
|
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|
|
+ " INTEGER NOT NULL DEFAULT 0");
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|
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}//更新到V4版本
|
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|
|
}//更新到V4版本
|
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|
}
|
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}
|
