pull/2/head
liuyitao 11 months ago
parent 8e3283724a
commit 2076caf5a7

@ -7,12 +7,12 @@
<deviceKey>
<Key>
<type value="VIRTUAL_DEVICE_PATH" />
<value value="D:\Android\Sdk\.android\.android\avd\Pixel_2_API_24XM.avd" />
<value value="D:\Android\Sdk\.android\.android\avd\Pixel_3.avd" />
</Key>
</deviceKey>
</Target>
</targetSelectedWithDropDown>
<timeTargetWasSelectedWithDropDown value="2023-12-20T15:43:22.376670700Z" />
<timeTargetWasSelectedWithDropDown value="2023-12-26T13:14:02.597971200Z" />
<targetsSelectedWithDialog>
<Target>
<type value="QUICK_BOOT_TARGET" />

@ -1,4 +1,4 @@
#Thu Dec 21 01:12:32 CST 2023
#Tue Dec 26 21:40:43 CST 2023
base.0=D\:\\Project1\\MiNotes\\src\\Notes-master\\app\\build\\intermediates\\dex\\debug\\mergeDexDebug\\classes.dex
path.0=classes.dex
renamed.0=classes.dex

@ -50,22 +50,28 @@ public class Contact {//联系人
sContactCache = new HashMap<String, String>();// 初始化联系人缓存
}
/* 查找HashMap中是否已有phoneNumber信息 */
/*
* HashMapphoneNumber
*/
if(sContactCache.containsKey(phoneNumber)) {// 如果在缓存中找到了电话号码对应的联系人信息
return sContactCache.get(phoneNumber);// 直接从缓存中返回联系人信息
}
String selection = CALLER_ID_SELECTION.replace("+",
PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));//PhoneNumberUtils.toCallerIDMinMatch() 方法将电话号码转换为最小匹配模式,构建带有电话号码的查询条件
Cursor cursor = context.getContentResolver().query(// 查找数据库中phoneNumber的信息
/*
* phoneNumber
* */
Cursor cursor = context.getContentResolver().query(
Data.CONTENT_URI,// 联系人数据的URI
new String [] { Phone.DISPLAY_NAME },// 要查询的字段,这里是联系人名字
selection,// 查询条件
new String[] { phoneNumber },// 查询条件中的占位符对应的值
null);// 不指定排序
if (cursor != null && cursor.moveToFirst()) {// 判定查询结果如果查询结果不为空且移动到第一条记录moveToFirst()返回第一条记录)
/*
* moveToFirst()
* */
if (cursor != null && cursor.moveToFirst()) {
try {// 找到相关信息
String name = cursor.getString(0);// 获取联系人名字
sContactCache.put(phoneNumber, name);// 将联系人名字放入缓存

@ -37,13 +37,17 @@ public class Notes {
* {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records
*/
// 系统文件夹的标识符
/*
*
* */
public static final int ID_ROOT_FOLDER = 0;// 默认文件夹
public static final int ID_TEMPARAY_FOLDER = -1;// 没有所属文件夹的便签
public static final int ID_CALL_RECORD_FOLDER = -2;// 存储通话记录的文件夹
public static final int ID_TRASH_FOLER = -3;// 垃圾箱文件夹
// 定义设置中的参数常量
/*
*
* */
public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date";// 提醒日期
public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id";// 背景颜色ID
public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id";// Widget ID
@ -51,12 +55,16 @@ public class Notes {
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
// 定义Widget类型常量
/*
* Widget
* */
public static final int TYPE_WIDGET_INVALIDE = -1;// 无效的Widget类型
public static final int TYPE_WIDGET_2X = 0;// 2x2大小的Widget
public static final int TYPE_WIDGET_4X = 1;// 4x4大小的Widget
// 定义便签数据类型常量
/*
* 便
* */
public static class DataConstants {
public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;// 文本便签数据类型
public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;// 电话便签数据类型
@ -179,7 +187,7 @@ public class Notes {
* <P> Type : INTEGER (long) </P>
*/
public static final String VERSION = "version";// 版本号
}//定义便签的属性的常量
}
/*
* DataColumns
@ -257,7 +265,6 @@ public class Notes {
*/
public static final String DATA5 = "data5";// 通用数据5
}
//定义存储便签内容数据
/*
* 便

@ -27,67 +27,89 @@ import android.util.Log;
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.DataConstants;
import net.micode.notes.data.Notes.NoteColumns;
//数据库操作用SQLOpenhelper,对一些note和文件进行数据库的操作比如删除文件后将文件里的note也相应删除
/*
* SQLOpenhelper,note
*/
public class NotesDatabaseHelper extends SQLiteOpenHelper {
private static final String DB_NAME = "note.db";
private static final String DB_NAME = "note.db";// 数据库名
private static final int DB_VERSION = 4;
private static final int DB_VERSION = 4;// 版本号
public interface TABLE {
//接口分成note和data在后面的程序里分别使用过
/*
* notedata,
* */
public static final String NOTE = "note";
public static final String DATA = "data";
}
private static final String TAG = "NotesDatabaseHelper";
private static final String TAG = "NotesDatabaseHelper";// 日志标签,用于在日志中标识数据库操作的相关信息
/*
* NotesDatabaseHelper getInstance() NotesDatabaseHelper
* 使
*/
private static NotesDatabaseHelper mInstance;
/*
* TABLE.NOTE便
*/
private static final String CREATE_NOTE_TABLE_SQL =
"CREATE TABLE " + TABLE.NOTE + "(" +
NoteColumns.ID + " INTEGER PRIMARY KEY," +
NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
")";//数据库中需要存储的项目的名称,就相当于创建一个表格的表头的内容
NoteColumns.ID + " INTEGER PRIMARY KEY," +// 便签ID
NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +// 便签父级的ID
NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +// 便签的提醒日期
NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," + // 便签的背景颜色ID
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," + // 便签的创建日期
NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +// 便签是否有附件
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +// 便签的最后修改日期
NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +// 文件夹中的便签数量
NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +// 文件夹名称或便签的文本内容
NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +// 便签的类型
NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +// 便签的Widget ID
NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +// 便签的Widget类型
NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +// 便签的同步ID
NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +// 便签的本地修改标记
NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +// 原始父级便签的ID
NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +// 便签在Google任务中的ID
NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +// 便签的版本号
")";
/*
* TABLE.DATA便
*/
private static final String CREATE_DATA_TABLE_SQL =
"CREATE TABLE " + TABLE.DATA + "(" +
DataColumns.ID + " INTEGER PRIMARY KEY," +
DataColumns.MIME_TYPE + " TEXT NOT NULL," +
DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
DataColumns.DATA1 + " INTEGER," +
DataColumns.DATA2 + " INTEGER," +
DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
")";//数据库中需要存储的项目的名称,与上面存储的项目不同
DataColumns.ID + " INTEGER PRIMARY KEY," +// 数据ID
DataColumns.MIME_TYPE + " TEXT NOT NULL," +// 数据ID数据的MIME类型
DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +// 数据所属的便签的ID
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +// 数据的创建日期
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +// 数据的最后修改日期
DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +// 数据的内容
DataColumns.DATA1 + " INTEGER," +// 数据的附加信息1
DataColumns.DATA2 + " INTEGER," +// 数据的附加信息2
DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +// 数据的附加信息3
DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +// 数据的附加信息4
DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +// 数据的附加信息5
")";
/*
* note_id_index TABLE.DATA DataColumns.NOTE_ID
*/
private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
"CREATE INDEX IF NOT EXISTS note_id_index ON " +
TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";//存储便签编号的一个数据表格
TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
/**
* Increase folder's note count when move note to the folder
*/
/*
* TABLE.NOTE NoteColumns.PARENT_ID 便
* TABLE.NOTE NoteColumns.NOTES_COUNT 1
*/
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER increase_folder_count_on_update "+
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
@ -96,11 +118,15 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END";
//在文件夹中移入一个Note之后需要更改的数据的表格
/**
* Decrease folder's note count when move note from folder
*/
/*
* TABLE.NOTE NoteColumns.PARENT_ID 便
* TABLE.NOTE NoteColumns.NOTES_COUNT 1
*/
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER decrease_folder_count_on_update " +
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
@ -110,10 +136,15 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
" END";
//在文件夹中移出一个Note之后需要更改的数据的表格
/**
* Increase folder's note count when insert new note to the folder
*/
/*
* TABLE.NOTE 便便
* TABLE.NOTE NoteColumns.NOTES_COUNT 1
*/
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
"CREATE TRIGGER increase_folder_count_on_insert " +
" AFTER INSERT ON " + TABLE.NOTE +
@ -122,10 +153,15 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END";
//在文件夹中插入一个Note之后需要更改的数据的表格
/**
* Decrease folder's note count when delete note from the folder
*/
/*
* TABLE.NOTE 便便
* TABLE.NOTE NoteColumns.NOTES_COUNT 1
*/
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
"CREATE TRIGGER decrease_folder_count_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE +
@ -135,10 +171,15 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
" AND " + NoteColumns.NOTES_COUNT + ">0;" +
" END";
//在文件夹中删除一个Note之后需要更改的数据的表格
/**
* Update note's content when insert data with type {@link DataConstants#NOTE}
*/
/*
* TABLE.DATA DataConstants.NOTE 便
* TABLE.NOTE NoteColumns.SNIPPET
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
"CREATE TRIGGER update_note_content_on_insert " +
" AFTER INSERT ON " + TABLE.DATA +
@ -148,10 +189,15 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" 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
/**
* Update note's content when data with {@link DataConstants#NOTE} type has changed
*/
/*
* DataConstants.NOTE 便
* TABLE.DATA 便
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER update_note_content_on_update " +
" AFTER UPDATE ON " + TABLE.DATA +
@ -161,10 +207,15 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" END";
//Note数据被修改后需要更改的数据的表格
/**
* Update note's content when data with {@link DataConstants#NOTE} type has deleted
*/
/*
* DataConstants.NOTE 便
* TABLE.DATA 便
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
"CREATE TRIGGER update_note_content_on_delete " +
" AFTER delete ON " + TABLE.DATA +
@ -174,10 +225,15 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" SET " + NoteColumns.SNIPPET + "=''" +
" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
" END";
//Note数据被删除后需要更改的数据的表格
/**
* Delete datas belong to note which has been deleted
*/
/*
* 便便
* TABLE.NOTE 便便
*/
private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
"CREATE TRIGGER delete_data_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE +
@ -185,10 +241,15 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" DELETE FROM " + TABLE.DATA +
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
" END";
//删除已删除的便签的数据后需要更改的数据的表格
/**
* Delete notes belong to folder which has been deleted
*/
/*
* 便
* TABLE.NOTE 便
*/
private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
"CREATE TRIGGER folder_delete_notes_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE +
@ -196,10 +257,15 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" DELETE FROM " + TABLE.NOTE +
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END";
//删除已删除的文件夹的便签后需要更改的数据的表格
/**
* Move notes belong to folder which has been moved to trash folder
*/
/*
* 便
* TABLE.NOTE 便IDID
*/
private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
"CREATE TRIGGER folder_move_notes_on_trash " +
" AFTER UPDATE ON " + TABLE.NOTE +
@ -209,22 +275,29 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END";
//还原垃圾桶中便签后需要更改的数据的表格
/*
*
*/
public NotesDatabaseHelper(Context context) {
super(context, DB_NAME, null, DB_VERSION);
}
//构造函数,传入数据库的名称和版本
/*
*
*/
public void createNoteTable(SQLiteDatabase db) {
db.execSQL(CREATE_NOTE_TABLE_SQL);
reCreateNoteTableTriggers(db);
createSystemFolder(db);
Log.d(TAG, "note table has been created");
}//创建表格(用来存储标签属性)
}
/*
*
*/
private void reCreateNoteTableTriggers(SQLiteDatabase db) {
// 通过执行SQL语句DROP TRIGGER IF EXISTS来删除已存在的触发器以确保不会重复创建
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");
@ -232,23 +305,28 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert");
db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
// 创建新的触发器
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);// 增加文件夹计数的触发器
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);// 减少文件夹计数的触发器
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);// 删除文件夹计数的触发器
db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER);// 在删除时同时删除数据的触发器
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);// 增加文件夹计数的触发器
db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);// 在删除时同时删除文件夹中的笔记的触发器
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);// 将笔记移动到垃圾箱的触发器
}
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);
db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER);
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
}//execSQL是数据库操作的API主要是更改行为的SQL语句。
// 在这里主要是用来重新创建上述定义的表格用的,先删除原来有的数据库的触发器再重新创建新的数据库
/*
* NoteColumns
*/
private void createSystemFolder(SQLiteDatabase db) {
ContentValues values = new ContentValues();
/**
* call record foler for call notes
*/
/*
*
*/
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
@ -256,6 +334,9 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
/**
* root folder which is default folder
*/
/*
*
*/
values.clear();
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
@ -264,6 +345,9 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
/**
* temporary folder which is used for moving note
*/
/*
*
*/
values.clear();
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
@ -272,19 +356,28 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
/**
* create trash folder
*/
/*
*
*/
values.clear();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
}//创建几个系统文件夹
}
/*
*
*/
public void createDataTable(SQLiteDatabase db) {
db.execSQL(CREATE_DATA_TABLE_SQL);
reCreateDataTableTriggers(db);
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
db.execSQL(CREATE_DATA_TABLE_SQL);// 执行 CREATE_DATA_TABLE_SQL 的 SQL 语句来创建数据表
reCreateDataTableTriggers(db);// 调用 reCreateDataTableTriggers() 方法重新创建数据表中的触发器
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);// 执行 CREATE_DATA_NOTE_ID_INDEX_SQL 的 SQL 语句来创建一个索引
Log.d(TAG, "data table has been created");
}//创建表格(用来存储标签内容)
}
/*
*
*/
private void reCreateDataTableTriggers(SQLiteDatabase db) {
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
@ -293,80 +386,121 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
}//同上面的execSQL
}
/*
*
* 线.
* 使
* 使
*/
static synchronized NotesDatabaseHelper getInstance(Context context) {
if (mInstance == null) {
mInstance = new NotesDatabaseHelper(context);
}
return mInstance;
}//解决同一时刻只能有一个线程执行.
//在写程序库代码时,有时有一个类需要被所的其它类使用
//但又要求这个类只能被实例化一次,是个服务类,定义一次,其它类使用同一个这个类的实例
}
@Override
/*
*
*/
public void onCreate(SQLiteDatabase db) {
createNoteTable(db);
createDataTable(db);
}//实现两个表格(上面创建的两个表格)
}
@Override
/*
*
*/
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
boolean reCreateTriggers = false;
boolean skipV2 = false;
boolean skipV2 = false;// 是否进行V2升级
/*
* 1upgradeToV2
*/
if (oldVersion == 1) {
upgradeToV2(db);
skipV2 = true; // this upgrade including the upgrade from v2 to v3
oldVersion++;
}
/*
* 2V2upgradeToV3
*/
if (oldVersion == 2 && !skipV2) {
upgradeToV3(db);
reCreateTriggers = true;
oldVersion++;
}
/*
* 3upgradeToV4
*/
if (oldVersion == 3) {
upgradeToV4(db);
oldVersion++;
}
/*
* reCreateNoteTableTriggersreCreateDataTableTriggers
*/
if (reCreateTriggers) {
reCreateNoteTableTriggers(db);
reCreateDataTableTriggers(db);
}
/*
*
*/
if (oldVersion != newVersion) {
throw new IllegalStateException("Upgrade notes database to version " + newVersion
+ "fails");
}
}//数据库版本的更新(数据库内容的更改)
}
/*
* V2
* */
private void upgradeToV2(SQLiteDatabase db) {
/*
* SQLDROP TABLE IF EXISTSNOTEDATA
* */
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
createNoteTable(db);
createDataTable(db);
}//更新到V2版本
createNoteTable(db);// 调用createNoteTable和createDataTable方法来创建新的NOTE表格
createDataTable(db);// 调用createNoteTable和createDataTable方法来创建新的DATA表格
}
/*
* V3
* */
private void upgradeToV3(SQLiteDatabase db) {
/*
* SQLDROP TRIGGER IF EXISTS使
* */
// drop unused triggers
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
/*
* ALTER TABLENOTEGTASK_IDTEXT''
* */
// add a column for gtask id
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
+ " TEXT NOT NULL DEFAULT ''");
/*
* ContentValuesNOTE
* */
// add a trash system folder
ContentValues values = new ContentValues();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
}//更新到V3版本
}
/*
* V4
* */
private void upgradeToV4(SQLiteDatabase db) {
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
+ " INTEGER NOT NULL DEFAULT 0");
}//更新到V4版本
+ " INTEGER NOT NULL DEFAULT 0");// 通过执行ALTER TABLE语句向NOTE表格中添加一个新的列VERSION该列的类型是INTEGER并设置默认值为0
}
}

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