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张国良代码注释提交

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pull/2/head
名称 8 months ago
parent 963e7d85a1
commit 4b1ebf8a80
5 changed files with 65 additions and 37 deletions
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3
Notes-master/.idea/.gitignore vendored
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@ -0,0 +1,3 @@
# Default ignored files
/shelf/
/workspace.xml

6
Notes-master/.idea/misc.xml
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@ -0,0 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectRootManager">
<output url="file://$PROJECT_DIR$/out" />
</component>
</project>

8
Notes-master/.idea/modules.xml
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@ -0,0 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectModuleManager">
<modules>
<module fileurl="file://$PROJECT_DIR$/Notes-master.iml" filepath="$PROJECT_DIR$/Notes-master.iml" />
</modules>
</component>
</project>

11
Notes-master/Notes-master.iml
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@ -0,0 +1,11 @@
<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
<component name="NewModuleRootManager" inherit-compiler-output="true">
<exclude-output />
<content url="file://$MODULE_DIR$">
<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
</component>
</module>

74
Notes-master/src/net/micode/notes/data/NotesDatabaseHelper.java
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@ -30,19 +30,19 @@ import net.micode.notes.data.Notes.NoteColumns;
public class NotesDatabaseHelper extends SQLiteOpenHelper {
private static final String DB_NAME = "note.db";
private static final int DB_VERSION = 4;
private static final int DB_VERSION = 4;// 数据库版本号
public interface TABLE {
public static final String NOTE = "note";
public static final String NOTE = "note";// 笔记表名
public static final String DATA = "data";
public static final String DATA = "data";// 数据表名
}
private static final String TAG = "NotesDatabaseHelper";
private static NotesDatabaseHelper mInstance;
private static final String CREATE_NOTE_TABLE_SQL =
private static final String CREATE_NOTE_TABLE_SQL =// 创建笔记表的SQL语句
"CREATE TABLE " + TABLE.NOTE + "(" +
NoteColumns.ID + " INTEGER PRIMARY KEY," +
NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
@ -63,7 +63,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
")";
private static final String CREATE_DATA_TABLE_SQL =
private static final String CREATE_DATA_TABLE_SQL =// 创建数据表的SQL语句
"CREATE TABLE " + TABLE.DATA + "(" +
DataColumns.ID + " INTEGER PRIMARY KEY," +
DataColumns.MIME_TYPE + " TEXT NOT NULL," +
@ -78,14 +78,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
")";
private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =// 创建数据表中NOTE_ID的索引SQL语句
"CREATE INDEX IF NOT EXISTS note_id_index ON " +
TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
/**
* Increase folder's note count when move note to the folder
*/
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =// 触发器：更新时增加文件夹笔记数量
"CREATE TRIGGER increase_folder_count_on_update "+
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
" BEGIN " +
@ -97,7 +97,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
/**
* Decrease folder's note count when move note from folder
*/
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = // 触发器：更新时减少文件夹笔记数量
"CREATE TRIGGER decrease_folder_count_on_update " +
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
" BEGIN " +
@ -110,7 +110,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
/**
* Increase folder's note count when insert new note to the folder
*/
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =// 触发器：删除时减少文件夹笔记数量
"CREATE TRIGGER increase_folder_count_on_insert " +
" AFTER INSERT ON " + TABLE.NOTE +
" BEGIN " +
@ -133,7 +133,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Update note's content when insert data with type {@link DataConstants#NOTE}
* 当插入数据类型为 {@link DataConstants#NOTE} 时，更新笔记内容
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
"CREATE TRIGGER update_note_content_on_insert " +
@ -146,7 +146,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Update note's content when data with {@link DataConstants#NOTE} type has changed
* 当数据类型为 {@link DataConstants#NOTE} 的数据发生更改时，更新笔记内容
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER update_note_content_on_update " +
@ -172,7 +172,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Delete datas belong to note which has been deleted
* 当数据表中的笔记被删除时，更新笔记内容触发器
*/
private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
"CREATE TRIGGER delete_data_on_delete " +
@ -182,8 +182,9 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
" END";
/**
* Delete notes belong to folder which has been deleted
* 当文件夹被删除时，删除其中的笔记触发器
*/
private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
"CREATE TRIGGER folder_delete_notes_on_delete " +
@ -194,7 +195,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
" END";
/**
* Move notes belong to folder which has been moved to trash folder
* 当文件夹中的笔记被移动到垃圾箱时，触发器将其移动到垃圾箱
*/
private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
"CREATE TRIGGER folder_move_notes_on_trash " +
@ -211,13 +212,13 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
}
public void createNoteTable(SQLiteDatabase db) {
db.execSQL(CREATE_NOTE_TABLE_SQL);
db.execSQL(CREATE_NOTE_TABLE_SQL); // 创建笔记表
reCreateNoteTableTriggers(db);
createSystemFolder(db);
Log.d(TAG, "note table has been created");
}
private void reCreateNoteTableTriggers(SQLiteDatabase db) {
private void reCreateNoteTableTriggers(SQLiteDatabase db) {// 重新创建笔记表触发器
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");
@ -235,18 +236,17 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
}
private void createSystemFolder(SQLiteDatabase db) {
private void createSystemFolder(SQLiteDatabase db) { // 创建系统文件夹
ContentValues values = new ContentValues();
/**
* call record foler for call notes
*/
/**
* 通话记录文件夹
*/
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
/**
* root folder which is default folder
* 默认根文件夹
*/
values.clear();
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
@ -254,7 +254,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.insert(TABLE.NOTE, null, values);
/**
* temporary folder which is used for moving note
* 临时文件夹，用于移动笔记
*/
values.clear();
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
@ -262,7 +262,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.insert(TABLE.NOTE, null, values);
/**
* create trash folder
* 创建垃圾箱文件夹
*/
values.clear();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
@ -270,24 +270,24 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.insert(TABLE.NOTE, null, values);
}
public void createDataTable(SQLiteDatabase db) {
public void createDataTable(SQLiteDatabase db) { // 创建数据表
db.execSQL(CREATE_DATA_TABLE_SQL);
reCreateDataTableTriggers(db);
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
Log.d(TAG, "data table has been created");
}
private void reCreateDataTableTriggers(SQLiteDatabase db) {
private void reCreateDataTableTriggers(SQLiteDatabase db) { // 删除旧的触发器
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
// 创建新的数据表触发器
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);
}
static synchronized NotesDatabaseHelper getInstance(Context context) {
static synchronized NotesDatabaseHelper getInstance(Context context) { // 获取单例实例
if (mInstance == null) {
mInstance = new NotesDatabaseHelper(context);
}
@ -295,7 +295,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
}
@Override
public void onCreate(SQLiteDatabase db) {
public void onCreate(SQLiteDatabase db) { // 创建数据库时调用的方法，创建笔记表和数据表
createNoteTable(db);
createDataTable(db);
}
@ -305,24 +305,24 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
boolean reCreateTriggers = false;
boolean skipV2 = false;
if (oldVersion == 1) {
if (oldVersion == 1) { // 升级到版本2
upgradeToV2(db);
skipV2 = true; // this upgrade including the upgrade from v2 to v3
skipV2 = true; // 此次升级包括从版本2到版本3的升级
oldVersion++;
}
if (oldVersion == 2 && !skipV2) {
upgradeToV3(db);
upgradeToV3(db); // 升级到版本3
reCreateTriggers = true;
oldVersion++;
}
if (oldVersion == 3) {
if (oldVersion == 3) { // 升级到版本4
upgradeToV4(db);
oldVersion++;
}
if (reCreateTriggers) {
if (reCreateTriggers) { // 重新创建触发器
reCreateNoteTableTriggers(db);
reCreateDataTableTriggers(db);
}
@ -333,14 +333,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
}
}
private void upgradeToV2(SQLiteDatabase db) {
private void upgradeToV2(SQLiteDatabase db) { // 升级到版本2，重新创建笔记表和数据表
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
createNoteTable(db);
createDataTable(db);
}
private void upgradeToV3(SQLiteDatabase db) {
private void upgradeToV3(SQLiteDatabase db) { // 升级到版本3，添加新列和系统文件夹
// 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");
@ -355,7 +355,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
db.insert(TABLE.NOTE, null, values);
}
private void upgradeToV4(SQLiteDatabase db) {
private void upgradeToV4(SQLiteDatabase db) { // 升级到版本4，添加新列
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
+ " INTEGER NOT NULL DEFAULT 0");
}

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