();
+ }
+ // 在哈希表中查找电话号码
+ if(sContactCache.containsKey(phoneNumber)) {
+ return sContactCache.get(phoneNumber);
+ }
+
+ String selection = CALLER_ID_SELECTION.replace("+",
+ PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
+
+ // 建立一个用户
+ Cursor cursor = context.getContentResolver().query(
+ Data.CONTENT_URI,
+ new String [] { Phone.DISPLAY_NAME },
+ selection,
+ new String[] { phoneNumber },
+ null);
+
+
+ // 添加任务
+ if (cursor != null && cursor.moveToFirst()) {
+ try {
+ String name = cursor.getString(0);
+ sContactCache.put(phoneNumber, name);
+ return name;
+ } catch (IndexOutOfBoundsException e) {
+ Log.e(TAG, " Cursor get string error " + e.toString());
+ return null;
+ } finally {
+ cursor.close();
+ }
+ } else {
+ Log.d(TAG, "No contact matched with number:" + phoneNumber);
+ return null;
+ }
+ }
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/data/Notes.java b/src/精读代码/组长：薛皓天/精读 data gtask/data/Notes.java
new file mode 100644
index 0000000..de683de
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/data/Notes.java
@@ -0,0 +1,368 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.data;
+
+import android.net.Uri;
+public class Notes {
+ public static final String AUTHORITY = "micode_notes";
+ public static final String TAG = "Notes";
+ public static final int TYPE_NOTE = 0;
+ public static final int TYPE_FOLDER = 1;
+ public static final int TYPE_SYSTEM = 2;
+
+ /**
+ * Following IDs are system folders' identifiers
+ * {@link Notes#ID_ROOT_FOLDER } is default folder
+ * {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder
+ * {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records
+ */
+
+ // id是系统文件夹的标识符
+ public static final int ID_ROOT_FOLDER = 0;// 标识默认文件夹
+ public static final int ID_TEMPARAY_FOLDER = -1;// 标识不属于文件夹的笔记
+ public static final int ID_CALL_RECORD_FOLDER = -2;// 用于存储通话记录
+ public static final int ID_TRASH_FOLER = -3;
+
+ // 通知日期
+ public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date";
+
+ // 背景颜色id
+ public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id";
+
+ // 小部件id
+ public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id";
+
+ // 小部件类型
+ public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type";
+
+ // 文件id
+ public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id";
+
+ // 调用日期
+ public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date";
+
+ public static final int TYPE_WIDGET_INVALIDE = -1;
+ public static final int TYPE_WIDGET_2X = 0;
+ public static final int TYPE_WIDGET_4X = 1;
+
+ public static class DataConstants {
+ public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;
+ public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;
+ }
+
+ /**
+ * Uri to query all notes and folders
+ */
+ // 查询所有笔记和文件夹
+ public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
+
+ /**
+ * Uri to query data
+ */
+ // 查询数据
+ public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
+
+ // NoteColumns 接口用于创建数据库
+ public interface NoteColumns {
+ /**
+ * The unique ID for a row
+ * Type: INTEGER (long)
+ */
+
+ // 对于一行唯一的ID
+ public static final String ID = "_id";
+
+ /**
+ * The parent's id for note or folder
+ * Type: INTEGER (long)
+ */
+
+ // 笔记或文件夹的父级id
+ public static final String PARENT_ID = "parent_id";
+
+ /**
+ * Created data for note or folder
+ * Type: INTEGER (long)
+ */
+
+ // 创建数据对于便签和文件
+ public static final String CREATED_DATE = "created_date";
+
+ /**
+ * Latest modified date
+ * Type: INTEGER (long)
+ */
+
+ // 最新修改日期
+ public static final String MODIFIED_DATE = "modified_date";
+
+
+ /**
+ * Alert date
+ * Type: INTEGER (long)
+ */
+
+ // 警报日期
+ public static final String ALERTED_DATE = "alert_date";
+
+ /**
+ * Folder's name or text content of note
+ * Type: TEXT
+ */
+
+
+ // 文件夹的名称或注意的文本内容
+ public static final String SNIPPET = "snippet";
+
+ /**
+ * Note's widget id
+ * Type: INTEGER (long)
+ */
+
+
+ // 便签的小部件ID
+ public static final String WIDGET_ID = "widget_id";
+
+ /**
+ * Note's widget type
+ * Type: INTEGER (long)
+ */
+
+ // 便签的小部件类型
+ public static final String WIDGET_TYPE = "widget_type";
+
+ /**
+ * Note's background color's id
+ * Type: INTEGER (long)
+ */
+
+
+ // 便签的背景颜色ID
+ public static final String BG_COLOR_ID = "bg_color_id";
+
+ /**
+ * For text note, it doesn't has attachment, for multi-media
+ * note, it has at least one attachment
+ * Type: INTEGER
+ */
+
+
+ // 对于文本笔记，它没有附件，对于多媒体笔记，它至少有一个附件
+ public static final String HAS_ATTACHMENT = "has_attachment";
+
+ /**
+ * Folder's count of notes
+ * Type: INTEGER (long)
+ */
+
+ // 文件夹的注释计数
+ public static final String NOTES_COUNT = "notes_count";
+
+ /**
+ * The file type: folder or note
+ * Type: INTEGER
+ */
+
+ // 文件类型
+ public static final String TYPE = "type";
+
+ /**
+ * The last sync id
+ * Type: INTEGER (long)
+ */
+
+
+ // 最终同步id
+ public static final String SYNC_ID = "sync_id";
+
+ /**
+ * Sign to indicate local modified or not
+ * Type: INTEGER
+ */
+
+ // 表示本地是否修改
+ public static final String LOCAL_MODIFIED = "local_modified";
+
+ /**
+ * Original parent id before moving into temporary folder
+ * Type : INTEGER
+ */
+
+ // 表示移动到临时文件夹前的原始父id
+ public static final String ORIGIN_PARENT_ID = "origin_parent_id";
+
+ /**
+ * The gtask id
+ * Type : TEXT
+ */
+
+ // 表示gtask id
+ public static final String GTASK_ID = "gtask_id";
+
+ /**
+ * The version code
+ * Type : INTEGER (long)
+ */
+
+ // 表示版本代码
+ public static final String VERSION = "version";
+ }
+
+ // 定义接口DataColumns 存储数据库数据
+ public interface DataColumns {
+ /**
+ * The unique ID for a row
+ * Type: INTEGER (long)
+ */
+
+ // 对于一行唯一的ID
+ public static final String ID = "_id";
+
+ /**
+ * The MIME type of the item represented by this row.
+ * Type: Text
+ */
+
+ // 表示项目的MIME类型
+ public static final String MIME_TYPE = "mime_type";
+
+ /**
+ * The reference id to note that this data belongs to
+ * Type: INTEGER (long)
+ */
+
+ // 指明便签id的所属
+ public static final String NOTE_ID = "note_id";
+
+ /**
+ * Created data for note or folder
+ * Type: INTEGER (long)
+ */
+
+
+ // 创建数据便签和文件夹
+ public static final String CREATED_DATE = "created_date";
+
+ /**
+ * Latest modified date
+ * Type: INTEGER (long)
+ */
+
+
+ // 最新修改信息
+ public static final String MODIFIED_DATE = "modified_date";
+
+ /**
+ * Data's content
+ * Type: TEXT
+ */
+
+
+ // 数据正文
+ public static final String CONTENT = "content";
+
+
+ /**
+ * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+ * integer data type
+ * Type: INTEGER
+ */
+
+ // 泛型数据类，用于整形数据
+ public static final String DATA1 = "data1";
+
+ /**
+ * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+ * integer data type
+ * Type: INTEGER
+ */
+
+ // 泛型数据类，用于整形数据同data1
+ public static final String DATA2 = "data2";
+
+ /**
+ * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+ * TEXT data type
+ * Type: TEXT
+ */
+
+ // 泛型数据类，用于文本型数据
+ public static final String DATA3 = "data3";
+
+ /**
+ * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+ * TEXT data type
+ * Type: TEXT
+ */
+
+ // 泛型数据类，用于文本型数据
+ public static final String DATA4 = "data4";
+
+ /**
+ * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+ * TEXT data type
+ * Type: TEXT
+ */
+
+ // 泛型数据类，用于文本型数据
+ public static final String DATA5 = "data5";
+ }
+
+ // TextNote 需要使用使用implements调用DataColumns接口
+ public static final class TextNote implements DataColumns {
+ /**
+ * Mode to indicate the text in check list mode or not
+ * Type: Integer 1:check list mode 0: normal mode
+ */
+
+ // 使用泛型数据类型查找是否处于列表模式
+ public static final String MODE = DATA2;
+
+ public static final int MODE_CHECK_LIST = 1;
+
+ public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";
+
+ public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";
+
+ public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
+ }
+
+ // CallNote 使用implements调用DataColumns接口
+ public static final class CallNote implements DataColumns {
+ /**
+ * Call date for this record
+ * Type: INTEGER (long)
+ */
+
+ // 记录呼叫的日期
+ public static final String CALL_DATE = DATA1;
+
+ /**
+ * Phone number for this record
+ * Type: TEXT
+ */
+
+ // 记录呼叫号码
+ public static final String PHONE_NUMBER = DATA3;
+
+ public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";
+
+ public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";
+
+ public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
+ }
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/data/NotesDatabaseHelper.java b/src/精读代码/组长：薛皓天/精读 data gtask/data/NotesDatabaseHelper.java
new file mode 100644
index 0000000..c618453
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/data/NotesDatabaseHelper.java
@@ -0,0 +1,404 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.data;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+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;
+
+// NotesDatabaseHelper 继承 SQLiteOpenHelper 对数据库各种框架的完善
+public class NotesDatabaseHelper extends SQLiteOpenHelper {
+ private static final String DB_NAME = "note.db";
+
+ private static final int DB_VERSION = 4;
+
+ public interface TABLE {
+ public static final String NOTE = "note";
+
+ public static final String DATA = "data";
+ }
+
+ private static final String TAG = "NotesDatabaseHelper";
+
+ private static NotesDatabaseHelper mInstance;
+
+ 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" +
+ ")";
+
+ 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 ''" +
+ ")";
+
+ private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
+ "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
+ */
+ // 增加文件夹的笔记计数时，移动笔记到文件夹
+ 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 +
+ " BEGIN " +
+ " UPDATE " + TABLE.NOTE +
+ " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+ " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+ " END";
+
+ /**
+ * Decrease folder's note count when move note from folder
+ */
+ // 从文件夹移动笔记时减少文件夹的笔记数
+ 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 +
+ " BEGIN " +
+ " UPDATE " + TABLE.NOTE +
+ " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
+ " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+ " AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
+ " END";
+
+ /**
+ * Increase folder's note count when insert new note to the folder
+ */
+ // 增加文件夹的笔记计数时，插入新的笔记到文件夹
+ private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
+ "CREATE TRIGGER increase_folder_count_on_insert " +
+ " AFTER INSERT ON " + TABLE.NOTE +
+ " BEGIN " +
+ " UPDATE " + TABLE.NOTE +
+ " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+ " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+ " END";
+
+ /**
+ * Decrease folder's note count when delete note from the folder
+ */
+ // 从文件夹中删除笔记时，减少文件夹的笔记计数
+ private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
+ "CREATE TRIGGER decrease_folder_count_on_delete " +
+ " AFTER DELETE ON " + TABLE.NOTE +
+ " BEGIN " +
+ " UPDATE " + TABLE.NOTE +
+ " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
+ " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+ " AND " + NoteColumns.NOTES_COUNT + ">0;" +
+ " END";
+
+ /**
+ * Update note's content when insert data with type {@link DataConstants#NOTE}
+ */
+ // 当插入带有类型的数据时，更新注释的内容
+ private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
+ "CREATE TRIGGER update_note_content_on_insert " +
+ " AFTER INSERT ON " + TABLE.DATA +
+ " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+ " BEGIN" +
+ " UPDATE " + TABLE.NOTE +
+ " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+ " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+ " END";
+
+ /**
+ * Update note's content when data with {@link DataConstants#NOTE} type has changed
+ */
+
+ // 当数据类型发生变化时，更新注释的内容
+ private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
+ "CREATE TRIGGER update_note_content_on_update " +
+ " AFTER UPDATE ON " + TABLE.DATA +
+ " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+ " BEGIN" +
+ " UPDATE " + TABLE.NOTE +
+ " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+ " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+ " END";
+
+ /**
+ * Update note's content when data with {@link DataConstants#NOTE} type has deleted
+ */
+
+ // 当类型的数据被删除时，更新注释的内容
+ private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
+ "CREATE TRIGGER update_note_content_on_delete " +
+ " AFTER delete ON " + TABLE.DATA +
+ " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+ " BEGIN" +
+ " UPDATE " + TABLE.NOTE +
+ " SET " + NoteColumns.SNIPPET + "=''" +
+ " WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
+ " END";
+
+ /**
+ * Delete datas belong to note which has been deleted
+ */
+
+ // 删除数据属于已删除的备注
+ private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
+ "CREATE TRIGGER delete_data_on_delete " +
+ " AFTER DELETE ON " + TABLE.NOTE +
+ " BEGIN" +
+ " DELETE FROM " + TABLE.DATA +
+ " WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
+ " END";
+
+ /**
+ * Delete notes belong to folder which has been deleted
+ */
+
+ // 删除笔记属于已删除的文件夹
+ private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
+ "CREATE TRIGGER folder_delete_notes_on_delete " +
+ " AFTER DELETE ON " + TABLE.NOTE +
+ " BEGIN" +
+ " DELETE FROM " + TABLE.NOTE +
+ " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
+ " END";
+
+ /**
+ * Move notes belong to folder which has been moved to trash folder
+ */
+
+ // 移动笔记属于已移动到垃圾文件夹的文件夹
+ private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
+ "CREATE TRIGGER folder_move_notes_on_trash " +
+ " AFTER UPDATE ON " + TABLE.NOTE +
+ " 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";
+
+ // 构造函数
+ public NotesDatabaseHelper(Context context) {
+ super(context, DB_NAME, null, DB_VERSION);
+ }
+
+ // 创建笔记数据库
+ public void createNoteTable(SQLiteDatabase db) {
+ db.execSQL(CREATE_NOTE_TABLE_SQL);
+ reCreateNoteTableTriggers(db);
+ createSystemFolder(db);
+ Log.d(TAG, "note table has been created");
+ }
+
+ // 重新创建笔记触发器
+ private void reCreateNoteTableTriggers(SQLiteDatabase db) {
+ 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");
+ db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete");
+ 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");
+
+ 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);
+ }
+
+ // 创建系统文件夹
+ private void createSystemFolder(SQLiteDatabase db) {
+ ContentValues values = new ContentValues();
+
+ /**
+ * call record foler for call notes
+ */
+
+ // 通话记录记录器
+ 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
+ values.clear();
+ values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
+ values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+ db.insert(TABLE.NOTE, null, values);
+
+ /**
+ * temporary folder which is used for moving note
+ */
+
+ // 创建用于移动笔记的临时文件夹
+ values.clear();
+ values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
+ values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+ db.insert(TABLE.NOTE, null, values);
+
+ /**
+ * create trash folder
+ */
+
+ // 创建垃圾文件夹
+ values.clear();
+ values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
+ values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+ db.insert(TABLE.NOTE, null, values);
+ }
+
+ // 创建数据的数据库
+ public void createDataTable(SQLiteDatabase db) {
+ db.execSQL(CREATE_DATA_TABLE_SQL);
+ reCreateDataTableTriggers(db);
+ db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
+ Log.d(TAG, "data table has been created");
+ }
+
+ // 重新创建数据数据库的触发器
+ 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");
+ db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
+
+ 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);
+ }
+
+
+ // 静态同步锁 保证进程获取资源的稳定性
+ static synchronized NotesDatabaseHelper getInstance(Context context) {
+ if (mInstance == null) {
+ mInstance = new NotesDatabaseHelper(context);
+ }
+ return mInstance;
+ }
+
+ @Override // 用于指定方法重写
+ // 创建两个数据库
+ public void onCreate(SQLiteDatabase db) {
+ createNoteTable(db);
+ createDataTable(db);
+ }
+
+
+ @Override
+ // 更新数据库信息
+ public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+ boolean reCreateTriggers = false;
+ boolean skipV2 = false;
+
+ if (oldVersion == 1) {
+ // 更新至V2
+ upgradeToV2(db);
+ skipV2 = true; // this upgrade including the upgrade from v2 to v3
+ oldVersion++;
+ }
+
+ if (oldVersion == 2 && !skipV2) {
+ // 更新至V3
+ upgradeToV3(db);
+ reCreateTriggers = true;
+ oldVersion++;
+ }
+
+ if (oldVersion == 3) {
+ // 更新至V4
+ upgradeToV4(db);
+ oldVersion++;
+ }
+
+ if (reCreateTriggers) {
+ // 触发触发器
+ reCreateNoteTableTriggers(db);
+ reCreateDataTableTriggers(db);
+ }
+
+ if (oldVersion != newVersion) {
+ throw new IllegalStateException("Upgrade notes database to version " + newVersion
+ + "fails");
+ }
+ }
+
+ // 更新V2的操作
+ private void upgradeToV2(SQLiteDatabase db) {
+ db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
+ db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
+ createNoteTable(db);
+ createDataTable(db);
+ }
+
+ // 更新V3的操作
+ private void upgradeToV3(SQLiteDatabase db) {
+ // 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");
+ // add a column for gtask id
+ db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
+ + " TEXT NOT NULL DEFAULT ''");
+ // 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);
+ }
+
+
+ // 更新至V4的操作
+ private void upgradeToV4(SQLiteDatabase db) {
+ db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
+ + " INTEGER NOT NULL DEFAULT 0");
+ }
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/data/NotesProvider.java b/src/精读代码/组长：薛皓天/精读 data gtask/data/NotesProvider.java
new file mode 100644
index 0000000..0cc0b32
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/data/NotesProvider.java
@@ -0,0 +1,328 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.data;
+
+
+import android.app.SearchManager;
+import android.content.ContentProvider;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Intent;
+import android.content.UriMatcher;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
+import android.text.TextUtils;
+import android.util.Log;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.data.NotesDatabaseHelper.TABLE;
+
+
+// NotesProvider 继承 ContentProvider
+// ContentProvider 管理 Android 以结构化方式存放的数据，以相对安全的方式封装数据
+public class NotesProvider extends ContentProvider {
+ private static final UriMatcher mMatcher;
+
+ private NotesDatabaseHelper mHelper;
+
+ private static final String TAG = "NotesProvider";
+
+ private static final int URI_NOTE = 1;
+ private static final int URI_NOTE_ITEM = 2;
+ private static final int URI_DATA = 3;
+ private static final int URI_DATA_ITEM = 4;
+
+ private static final int URI_SEARCH = 5;
+ private static final int URI_SEARCH_SUGGEST = 6;
+
+
+ // 添加URI 让URI工具类解析路径字符串
+ static {
+ mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+ mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
+ mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM);
+ mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA);
+ mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM);
+ mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH);
+ mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST);
+ mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST);
+ }
+
+ /**
+ * x'0A' represents the '\n' character in sqlite. For title and content in the search result,
+ * we will trim '\n' and white space in order to show more information.
+ */
+
+ // x'0A'表示sqlite中的'\n'字符。对于搜索结果中的标题和内容，我们将删去'\n'和空白以显示更多信息。
+ private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + ","
+ + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
+ + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + ","
+ + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
+ + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
+ + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
+ + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
+
+ private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
+ + " FROM " + TABLE.NOTE
+ + " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
+ + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
+ + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
+
+ // 创建数据库帮助类
+ @Override
+ public boolean onCreate() {
+ mHelper = NotesDatabaseHelper.getInstance(getContext());
+ return true;
+ }
+
+ // 查找给定路径
+ @Override
+ public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+ String sortOrder) {
+ Cursor c = null;
+ SQLiteDatabase db = mHelper.getReadableDatabase();
+ String id = null;
+ switch (mMatcher.match(uri)) {
+ case URI_NOTE:
+ // 当匹配结果是1的时候 查询便签信息
+ c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
+ sortOrder);
+ break;
+ case URI_NOTE_ITEM:
+ // 当匹配结果是2的时候 查询便签信息 获取id
+ id = uri.getPathSegments().get(1);
+ c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id
+ + parseSelection(selection), selectionArgs, null, null, sortOrder);
+ break;
+ case URI_DATA:
+ // 当匹配结果是3的时候 查询数据信息
+ c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
+ sortOrder);
+ break;
+ case URI_DATA_ITEM:
+ // 当匹配结果是4的时候 查询数据
+ id = uri.getPathSegments().get(1);
+ c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id
+ + parseSelection(selection), selectionArgs, null, null, sortOrder);
+ break;
+ case URI_SEARCH:
+ case URI_SEARCH_SUGGEST:
+ if (sortOrder != null || projection != null) {
+ throw new IllegalArgumentException(
+ "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
+ }
+
+ String searchString = null;
+ if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
+ if (uri.getPathSegments().size() > 1) {
+ searchString = uri.getPathSegments().get(1);
+ }
+ } else {
+ searchString = uri.getQueryParameter("pattern");
+ }
+
+ if (TextUtils.isEmpty(searchString)) {
+ return null;
+ }
+
+ try {
+ searchString = String.format("%%%s%%", searchString);
+ c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
+ new String[] { searchString });
+ } catch (IllegalStateException ex) {
+ Log.e(TAG, "got exception: " + ex.toString());
+ }
+ break;
+ default:
+ throw new IllegalArgumentException("Unknown URI " + uri);
+ }
+ if (c != null) {
+ c.setNotificationUri(getContext().getContentResolver(), uri);
+ }
+ return c;
+ }
+
+ // 该方法使用SQLiteOpenHelper实例打开一个可写的SQLiteDatabase，并根据Uri参数将数据插入到表中。如果插入成功，则返回所插入数据的Uri。
+ @Override
+ public Uri insert(Uri uri, ContentValues values) {
+ SQLiteDatabase db = mHelper.getWritableDatabase();
+ long dataId = 0, noteId = 0, insertedId = 0;
+ switch (mMatcher.match(uri)) {
+ case URI_NOTE:
+ insertedId = noteId = db.insert(TABLE.NOTE, null, values);
+ break;
+ case URI_DATA:
+ if (values.containsKey(DataColumns.NOTE_ID)) {
+ noteId = values.getAsLong(DataColumns.NOTE_ID);
+ } else {
+ Log.d(TAG, "Wrong data format without note id:" + values.toString());
+ }
+ insertedId = dataId = db.insert(TABLE.DATA, null, values);
+ break;
+ default:
+ throw new IllegalArgumentException("Unknown URI " + uri);
+ }
+ // Notify the note uri
+ if (noteId > 0) {
+ getContext().getContentResolver().notifyChange(
+ ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
+ }
+
+ // Notify the data uri
+ if (dataId > 0) {
+ getContext().getContentResolver().notifyChange(
+ ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
+ }
+
+ return ContentUris.withAppendedId(uri, insertedId);
+ }
+
+
+ @Override
+ // 使用SQLiteOpenHelper实例打开一个可写的SQLiteDatabase，并根据Uri、selection和selectionArgs参数从表中删除数据。如果删除成功，它将返回受影响的行数。
+ public int delete(Uri uri, String selection, String[] selectionArgs) {
+ int count = 0;
+ String id = null;
+ SQLiteDatabase db = mHelper.getWritableDatabase();
+ boolean deleteData = false;
+ switch (mMatcher.match(uri)) {
+ case URI_NOTE:
+ selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
+ count = db.delete(TABLE.NOTE, selection, selectionArgs);
+ break;
+ case URI_NOTE_ITEM:
+ id = uri.getPathSegments().get(1);
+ /**
+ * ID that smaller than 0 is system folder which is not allowed to
+ * trash
+ */
+ long noteId = Long.valueOf(id);
+ if (noteId <= 0) {
+ // 如果编号是小于等于0的那么就放到垃圾桶里
+ break;
+ }
+ count = db.delete(TABLE.NOTE,
+ NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
+ break;
+ case URI_DATA:
+ count = db.delete(TABLE.DATA, selection, selectionArgs);
+ deleteData = true;
+ break;
+ case URI_DATA_ITEM:
+ id = uri.getPathSegments().get(1);
+ count = db.delete(TABLE.DATA,
+ DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
+ deleteData = true;
+ break;
+ default:
+ throw new IllegalArgumentException("Unknown URI " + uri);
+ }
+ if (count > 0) {
+ if (deleteData) {
+ getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
+ }
+ getContext().getContentResolver().notifyChange(uri, null);
+ }
+ return count;
+ }
+
+ @Override
+ public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+ int count = 0;
+ String id = null;
+ SQLiteDatabase db = mHelper.getWritableDatabase();
+ boolean updateData = false;
+ switch (mMatcher.match(uri)) {
+ // 如果Uri与URI_NOTE或URI_NOTE_ITEM匹配，该方法增加注释版本，然后更新TABLE。
+ case URI_NOTE:
+ increaseNoteVersion(-1, selection, selectionArgs);
+ count = db.update(TABLE.NOTE, values, selection, selectionArgs);
+ break;
+ case URI_NOTE_ITEM:
+ id = uri.getPathSegments().get(1);
+ increaseNoteVersion(Long.valueOf(id), selection, selectionArgs);
+ count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id
+ + parseSelection(selection), selectionArgs);
+ break;
+
+ // 如果Uri与URI_DATA或URI_DATA_ITEM匹配，则更新该表。
+ case URI_DATA:
+ count = db.update(TABLE.DATA, values, selection, selectionArgs);
+ updateData = true;
+ break;
+ case URI_DATA_ITEM:
+ id = uri.getPathSegments().get(1);
+ count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
+ + parseSelection(selection), selectionArgs);
+ updateData = true;
+ break;
+ default:
+ throw new IllegalArgumentException("Unknown URI " + uri);
+ }
+
+ if (count > 0) {
+ if (updateData) {
+ getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
+ }
+ getContext().getContentResolver().notifyChange(uri, null);
+ }
+ return count;
+ }
+
+ // 解析选择
+ private String parseSelection(String selection) {
+ return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
+ }
+
+ // 更新便签版本
+ private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
+ StringBuilder sql = new StringBuilder(120);
+ sql.append("UPDATE ");
+ sql.append(TABLE.NOTE);
+ sql.append(" SET ");
+ sql.append(NoteColumns.VERSION);
+ sql.append("=" + NoteColumns.VERSION + "+1 ");
+
+ if (id > 0 || !TextUtils.isEmpty(selection)) {
+ sql.append(" WHERE ");
+ }
+ if (id > 0) {
+ sql.append(NoteColumns.ID + "=" + String.valueOf(id));
+ }
+ if (!TextUtils.isEmpty(selection)) {
+ String selectString = id > 0 ? parseSelection(selection) : selection;
+ for (String args : selectionArgs) {
+ selectString = selectString.replaceFirst("\\?", args);
+ }
+ sql.append(selectString);
+ }
+
+ mHelper.getWritableDatabase().execSQL(sql.toString());
+ }
+
+ // getType方法返回与给定Uri关联的数据的MIME类型。
+ @Override
+ public String getType(Uri uri) {
+ // 自动生成的方法存根
+ // TODO Auto-generated method stub
+ return null;
+ }
+
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/MetaData.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/MetaData.java
new file mode 100644
index 0000000..509548c
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/MetaData.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+import android.util.Log;
+
+import net.micode.notes.tool.GTaskStringUtils;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+// MetaData 继承 Task
+
+public class MetaData extends Task {
+ private final static String TAG = MetaData.class.getSimpleName();
+
+ private String mRelatedGid = null;
+
+ // setMeta方法以String gid和JSONObject metaInfo作为参数，并将gid作为属性添加到metaInfo JSON对象，键为GTaskStringUtils
+ public void setMeta(String gid, JSONObject metaInfo) {
+ try {
+ metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
+ } catch (JSONException e) {
+ Log.e(TAG, "failed to put related gid");
+ }
+ setNotes(metaInfo.toString());
+ setName(GTaskStringUtils.META_NOTE_NAME);
+ }
+
+ // 返回mRelatedGid成员变量的值
+ public String getRelatedGid() {
+ return mRelatedGid;
+ }
+
+
+ // 指示任务的注释是否为非空
+ @Override
+ public boolean isWorthSaving() {
+ return getNotes() != null;
+ }
+
+ // 如果任务的注释是非空的，它会尝试将它们解析为JSON对象，并提取与GTaskStringUtils相关的值。META_HEAD_GTASK_ID关键。
+ // 如果成功，它将mRelatedGid成员变量设置为该值。如果不成功，它将记录一条警告消息，并将mRelatedGid设置为null
+ @Override
+ public void setContentByRemoteJSON(JSONObject js) {
+ super.setContentByRemoteJSON(js);
+ if (getNotes() != null) {
+ try {
+ JSONObject metaInfo = new JSONObject(getNotes().trim());
+ mRelatedGid = metaInfo.getString(GTaskStringUtils.META_HEAD_GTASK_ID);
+ } catch (JSONException e) {
+ Log.w(TAG, "failed to get related gid");
+ mRelatedGid = null;
+ }
+ }
+ }
+
+
+ // 带有指示不应该调用它们的消息
+ @Override
+ public void setContentByLocalJSON(JSONObject js) {
+ // this function should not be called
+ throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
+ }
+
+ @Override
+ public JSONObject getLocalJSONFromContent() {
+ throw new IllegalAccessError("MetaData:getLocalJSONFromContent should not be called");
+ }
+
+ @Override
+ public int getSyncAction(Cursor c) {
+ throw new IllegalAccessError("MetaData:getSyncAction should not be called");
+ }
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/Node.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/Node.java
new file mode 100644
index 0000000..282f33e
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/Node.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+
+import org.json.JSONObject;
+
+// 定义节点类
+public abstract class Node {
+ // 不进行同步
+ public static final int SYNC_ACTION_NONE = 0;
+
+ // 增添信息同步至云端
+ public static final int SYNC_ACTION_ADD_REMOTE = 1;
+
+ // 增添信息同步至本地
+ public static final int SYNC_ACTION_ADD_LOCAL = 2;
+
+ // 删除信息同步至云端
+ public static final int SYNC_ACTION_DEL_REMOTE = 3;
+
+ // 删除信息同步至本地
+ public static final int SYNC_ACTION_DEL_LOCAL = 4;
+
+ // 更新信息同步至云端
+ public static final int SYNC_ACTION_UPDATE_REMOTE = 5;
+
+ // 更新信息同步至本地
+ public static final int SYNC_ACTION_UPDATE_LOCAL = 6;
+
+ // 同步冲突
+ public static final int SYNC_ACTION_UPDATE_CONFLICT = 7;
+
+ // 同步错误
+ public static final int SYNC_ACTION_ERROR = 8;
+
+ private String mGid;
+
+ private String mName;
+
+ private long mLastModified;
+
+ private boolean mDeleted;
+
+ public Node() {
+ mGid = null;
+ mName = "";
+ mLastModified = 0;
+ mDeleted = false;
+ }
+
+ public abstract JSONObject getCreateAction(int actionId);
+
+ public abstract JSONObject getUpdateAction(int actionId);
+
+ public abstract void setContentByRemoteJSON(JSONObject js);
+
+ public abstract void setContentByLocalJSON(JSONObject js);
+
+ public abstract JSONObject getLocalJSONFromContent();
+
+ public abstract int getSyncAction(Cursor c);
+
+ public void setGid(String gid) {
+ this.mGid = gid;
+ }
+
+ public void setName(String name) {
+ this.mName = name;
+ }
+
+ public void setLastModified(long lastModified) {
+ this.mLastModified = lastModified;
+ }
+
+ public void setDeleted(boolean deleted) {
+ this.mDeleted = deleted;
+ }
+
+ public String getGid() {
+ return this.mGid;
+ }
+
+ public String getName() {
+ return this.mName;
+ }
+
+ public long getLastModified() {
+ return this.mLastModified;
+ }
+
+ public boolean getDeleted() {
+ return this.mDeleted;
+ }
+
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/SqlData.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/SqlData.java
new file mode 100644
index 0000000..6850bbf
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/SqlData.java
@@ -0,0 +1,205 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.content.ContentResolver;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.DataConstants;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.data.NotesDatabaseHelper.TABLE;
+import net.micode.notes.gtask.exception.ActionFailureException;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+
+public class SqlData {
+ private static final String TAG = SqlData.class.getSimpleName();
+
+ private static final int INVALID_ID = -99999;
+
+ // 用于访问某种数据库或数据结构中的数据的列名或键
+ public static final String[] PROJECTION_DATA = new String[] {
+ DataColumns.ID, DataColumns.MIME_TYPE, DataColumns.CONTENT, DataColumns.DATA1,
+ DataColumns.DATA3
+ };
+
+ public static final int DATA_ID_COLUMN = 0;
+
+ public static final int DATA_MIME_TYPE_COLUMN = 1;
+
+ public static final int DATA_CONTENT_COLUMN = 2;
+
+ public static final int DATA_CONTENT_DATA_1_COLUMN = 3;
+
+ public static final int DATA_CONTENT_DATA_3_COLUMN = 4;
+
+ private ContentResolver mContentResolver;
+
+ private boolean mIsCreate;
+
+ private long mDataId;
+
+ private String mDataMimeType;
+
+ private String mDataContent;
+
+ private long mDataContentData1;
+
+ private String mDataContentData3;
+
+ private ContentValues mDiffDataValues;
+
+
+ /*
+ * 用于管理某种SQLite数据库中的数据，其中mDataId可以表示特定数据条目的主键或ID,
+ * mDataMimeType可以表示存储的数据类型，mDataContent、mDataContentData1和mDataContentData3可以表示其他数据字段
+ */
+ public SqlData(Context context) {
+ mContentResolver = context.getContentResolver();
+ mIsCreate = true;
+ mDataId = INVALID_ID;
+ mDataMimeType = DataConstants.NOTE;
+ mDataContent = "";
+ mDataContentData1 = 0;
+ mDataContentData3 = "";
+ mDiffDataValues = new ContentValues();
+ }
+
+ // 构造函数用于获取ContentProvider提供的数据
+ public SqlData(Context context, Cursor c) {
+ mContentResolver = context.getContentResolver();
+ mIsCreate = false;
+ loadFromCursor(c);
+ mDiffDataValues = new ContentValues();
+ }
+
+
+ // 存入数据，将前面定义的变量加载到类的对象中
+ private void loadFromCursor(Cursor c) {
+ mDataId = c.getLong(DATA_ID_COLUMN);
+ mDataMimeType = c.getString(DATA_MIME_TYPE_COLUMN);
+ mDataContent = c.getString(DATA_CONTENT_COLUMN);
+ mDataContentData1 = c.getLong(DATA_CONTENT_DATA_1_COLUMN);
+ mDataContentData3 = c.getString(DATA_CONTENT_DATA_3_COLUMN);
+ }
+
+
+ // 接受一个JSONObject作为参数，该参数表示要存储在数据库中的数据。该方法解析JSONObject并设置SqlData对象的相应成员变量。
+ // 如果SqlData对象是新的或者数据ID已更改，该方法将ID添加到mDiffDataValues对象。
+ public void setContent(JSONObject js) throws JSONException {
+ long dataId = js.has(DataColumns.ID) ? js.getLong(DataColumns.ID) : INVALID_ID;
+ if (mIsCreate || mDataId != dataId) {
+ mDiffDataValues.put(DataColumns.ID, dataId);
+ }
+ mDataId = dataId;
+
+ String dataMimeType = js.has(DataColumns.MIME_TYPE) ? js.getString(DataColumns.MIME_TYPE)
+ : DataConstants.NOTE;
+ if (mIsCreate || !mDataMimeType.equals(dataMimeType)) {
+ mDiffDataValues.put(DataColumns.MIME_TYPE, dataMimeType);
+ }
+ mDataMimeType = dataMimeType;
+
+ String dataContent = js.has(DataColumns.CONTENT) ? js.getString(DataColumns.CONTENT) : "";
+ if (mIsCreate || !mDataContent.equals(dataContent)) {
+ mDiffDataValues.put(DataColumns.CONTENT, dataContent);
+ }
+ mDataContent = dataContent;
+
+ long dataContentData1 = js.has(DataColumns.DATA1) ? js.getLong(DataColumns.DATA1) : 0;
+ if (mIsCreate || mDataContentData1 != dataContentData1) {
+ mDiffDataValues.put(DataColumns.DATA1, dataContentData1);
+ }
+ mDataContentData1 = dataContentData1;
+
+ String dataContentData3 = js.has(DataColumns.DATA3) ? js.getString(DataColumns.DATA3) : "";
+ if (mIsCreate || !mDataContentData3.equals(dataContentData3)) {
+ mDiffDataValues.put(DataColumns.DATA3, dataContentData3);
+ }
+ mDataContentData3 = dataContentData3;
+ }
+
+ // 创建一个新的JSONObject，并将SqlData对象的成员变量设置为JSONObject的键值对。
+ // 该方法返回结果的JSONObject。如果SqlData对象是新的，则该方法返回null
+ public JSONObject getContent() throws JSONException {
+ if (mIsCreate) {
+ Log.e(TAG, "it seems that we haven't created this in database yet");
+ return null;
+ }
+ JSONObject js = new JSONObject();
+ js.put(DataColumns.ID, mDataId);
+ js.put(DataColumns.MIME_TYPE, mDataMimeType);
+ js.put(DataColumns.CONTENT, mDataContent);
+ js.put(DataColumns.DATA1, mDataContentData1);
+ js.put(DataColumns.DATA3, mDataContentData3);
+ return js;
+ }
+
+
+ // 提交修改，并保存至数据库
+ public void commit(long noteId, boolean validateVersion, long version) {
+
+ if (mIsCreate) {
+ if (mDataId == INVALID_ID && mDiffDataValues.containsKey(DataColumns.ID)) {
+ mDiffDataValues.remove(DataColumns.ID);
+ }
+
+ mDiffDataValues.put(DataColumns.NOTE_ID, noteId);
+ Uri uri = mContentResolver.insert(Notes.CONTENT_DATA_URI, mDiffDataValues);
+ try {
+ mDataId = Long.valueOf(uri.getPathSegments().get(1));
+ } catch (NumberFormatException e) {
+ Log.e(TAG, "Get note id error :" + e.toString());
+ throw new ActionFailureException("create note failed");
+ }
+ } else {
+ if (mDiffDataValues.size() > 0) {
+ int result = 0;
+ if (!validateVersion) {
+ result = mContentResolver.update(ContentUris.withAppendedId(
+ Notes.CONTENT_DATA_URI, mDataId), mDiffDataValues, null, null);
+ } else {
+ result = mContentResolver.update(ContentUris.withAppendedId(
+ Notes.CONTENT_DATA_URI, mDataId), mDiffDataValues,
+ " ? in (SELECT " + NoteColumns.ID + " FROM " + TABLE.NOTE
+ + " WHERE " + NoteColumns.VERSION + "=?)", new String[] {
+ String.valueOf(noteId), String.valueOf(version)
+ });
+ }
+ if (result == 0) {
+ Log.w(TAG, "there is no update. maybe user updates note when syncing");
+ }
+ }
+ }
+
+ mDiffDataValues.clear();
+ mIsCreate = false;
+ }
+
+ public long getId() {
+ return mDataId;
+ }
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/SqlNote.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/SqlNote.java
new file mode 100644
index 0000000..5c776e2
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/SqlNote.java
@@ -0,0 +1,534 @@
+/*
+ * Description：用于支持小米便签最底层的数据库相关操作，和sqldata的关系上是父集关系，即note是data的子父集。
+ * 和SqlData相比，SqlNote算是真正意义上的数据了。
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.appwidget.AppWidgetManager;
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.tool.GTaskStringUtils;
+import net.micode.notes.tool.ResourceParser;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+
+
+public class SqlNote {
+ private static final String TAG = SqlNote.class.getSimpleName();
+
+ private static final int INVALID_ID = -99999;
+ // 集合了interface NoteColumns中所有SF常量（17个）
+ public static final String[] PROJECTION_NOTE = new String[] {
+ NoteColumns.ID, NoteColumns.ALERTED_DATE, NoteColumns.BG_COLOR_ID,
+ NoteColumns.CREATED_DATE, NoteColumns.HAS_ATTACHMENT, NoteColumns.MODIFIED_DATE,
+ NoteColumns.NOTES_COUNT, NoteColumns.PARENT_ID, NoteColumns.SNIPPET, NoteColumns.TYPE,
+ NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE, NoteColumns.SYNC_ID,
+ NoteColumns.LOCAL_MODIFIED, NoteColumns.ORIGIN_PARENT_ID, NoteColumns.GTASK_ID,
+ NoteColumns.VERSION
+ };
+ //以下设置17个列的编号
+ public static final int ID_COLUMN = 0;
+
+ public static final int ALERTED_DATE_COLUMN = 1;
+
+ public static final int BG_COLOR_ID_COLUMN = 2;
+
+ public static final int CREATED_DATE_COLUMN = 3;
+
+ public static final int HAS_ATTACHMENT_COLUMN = 4;
+
+ public static final int MODIFIED_DATE_COLUMN = 5;
+
+ public static final int NOTES_COUNT_COLUMN = 6;
+
+ public static final int PARENT_ID_COLUMN = 7;
+
+ public static final int SNIPPET_COLUMN = 8;
+
+ public static final int TYPE_COLUMN = 9;
+
+ public static final int WIDGET_ID_COLUMN = 10;
+
+ public static final int WIDGET_TYPE_COLUMN = 11;
+
+ public static final int SYNC_ID_COLUMN = 12;
+
+ public static final int LOCAL_MODIFIED_COLUMN = 13;
+
+ public static final int ORIGIN_PARENT_ID_COLUMN = 14;
+
+ public static final int GTASK_ID_COLUMN = 15;
+
+ public static final int VERSION_COLUMN = 16;
+ //一下定义了17个内部的变量，其中12个可以由content中获得，5个需要初始化为0或者new
+ private Context mContext;
+
+ private ContentResolver mContentResolver;
+
+ private boolean mIsCreate;
+
+ private long mId;
+
+ private long mAlertDate;
+
+ private int mBgColorId;
+
+ private long mCreatedDate;
+
+ private int mHasAttachment;
+
+ private long mModifiedDate;
+
+ private long mParentId;
+
+ private String mSnippet;
+
+ private int mType;
+
+ private int mWidgetId;
+
+ private int mWidgetType;
+
+ private long mOriginParent;
+
+ private long mVersion;
+
+ private ContentValues mDiffNoteValues;
+
+ private ArrayList mDataList;
+ /*
+ * 功能描述：构造函数
+ * 参数注解： mIsCreate用于标示构造方式
+ */
+ // 构造函数只有context，对所有的变量进行初始化
+ public SqlNote(Context context) {
+ // 获取context程序间共享数据
+ mContext = context;
+ mContentResolver = context.getContentResolver();
+ mIsCreate = true;
+ mId = INVALID_ID;
+ mAlertDate = 0;
+ mBgColorId = ResourceParser.getDefaultBgId(context);
+ //调用系统函数获得创建时间
+ mCreatedDate = System.currentTimeMillis();
+ mHasAttachment = 0;
+ //最后一次修改时间初始化为创建时间
+ mModifiedDate = System.currentTimeMillis();
+ mParentId = 0;
+ mSnippet = "";
+ mType = Notes.TYPE_NOTE;
+ mWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
+ mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
+ mOriginParent = 0;
+ mVersion = 0;
+ // 新建一个NoteValues值，用来记录改变的values
+ mDiffNoteValues = new ContentValues();
+ // 新建一个data的列表
+ mDataList = new ArrayList();
+ }
+ /*
+ * 功能描述：构造函数
+ * 参数注解： mIsCreate用于标示构造方式
+ */
+ //构造函数有context和一个数据库的cursor，多数变量通过cursor指向的一条记录直接进行初始化
+ public SqlNote(Context context, Cursor c) {
+ // 将mIsCreate定义为False作为标识，以id为参数，运行loadFromCursor函数
+ mContext = context;
+ mContentResolver = context.getContentResolver();
+ mIsCreate = false;
+ loadFromCursor(c);
+ mDataList = new ArrayList();
+ if (mType == Notes.TYPE_NOTE)
+ loadDataContent();
+ mDiffNoteValues = new ContentValues();
+ }
+ /*
+ * 功能描述：构造函数
+ * 参数注解： mIsCreate用于标示构造方式
+ */
+ public SqlNote(Context context, long id) {
+ mContext = context;
+ mContentResolver = context.getContentResolver();
+ mIsCreate = false;
+ loadFromCursor(id);
+ mDataList = new ArrayList();
+ if (mType == Notes.TYPE_NOTE)
+ loadDataContent();
+ mDiffNoteValues = new ContentValues();
+
+ }
+ // 功能描述：通过id从光标处加载数据
+ private void loadFromCursor(long id) {
+ Cursor c = null;
+ try {
+ // 通过id获得对应的ContentResolver中的cursor
+ c = mContentResolver.query(Notes.CONTENT_NOTE_URI, PROJECTION_NOTE, "(_id=?)",
+ new String[] {
+ String.valueOf(id)
+ }, null);
+ if (c != null) {
+ c.moveToNext();
+ //然后加载数据进行初始化，这样函数
+ //SqlNote(Context context, long id)与SqlNote(Context context, long id)的实现方式基本相同
+ loadFromCursor(c);
+ } else {
+ Log.w(TAG, "loadFromCursor: cursor = null");
+ }
+ } finally {
+ if (c != null)
+ c.close();
+ }
+ }
+ // 功能描述：通过游标从光标处加载数据
+ private void loadFromCursor(Cursor c) {
+ mId = c.getLong(ID_COLUMN);
+ mAlertDate = c.getLong(ALERTED_DATE_COLUMN);
+ mBgColorId = c.getInt(BG_COLOR_ID_COLUMN);
+ mCreatedDate = c.getLong(CREATED_DATE_COLUMN);
+ mHasAttachment = c.getInt(HAS_ATTACHMENT_COLUMN);
+ mModifiedDate = c.getLong(MODIFIED_DATE_COLUMN);
+ mParentId = c.getLong(PARENT_ID_COLUMN);
+ mSnippet = c.getString(SNIPPET_COLUMN);
+ mType = c.getInt(TYPE_COLUMN);
+ mWidgetId = c.getInt(WIDGET_ID_COLUMN);
+ mWidgetType = c.getInt(WIDGET_TYPE_COLUMN);
+ mVersion = c.getLong(VERSION_COLUMN);
+ }
+ // 功能描述：通过content机制获取共享数据并加载到数据库当前游标处
+ private void loadDataContent() {
+ Cursor c = null;
+ mDataList.clear();
+ // 获取ID对应content内容
+ try {
+ c = mContentResolver.query(Notes.CONTENT_DATA_URI, SqlData.PROJECTION_DATA,
+ "(note_id=?)", new String[] {
+ String.valueOf(mId)
+ }, null);
+ if (c != null) {
+ if (c.getCount() == 0) {
+ Log.w(TAG, "it seems that the note has not data");
+ return;
+ }
+ while (c.moveToNext()) {
+ SqlData data = new SqlData(mContext, c);
+ mDataList.add(data);
+ }
+ } else {
+ // 该ID在content中无对应的cursor
+ Log.w(TAG, "loadDataContent: cursor = null");
+ }
+ } finally {
+ if (c != null)
+ c.close();
+ }
+ }
+ // 设置通过content机制用于共享的数据信息
+ public boolean setContent(JSONObject js) {
+ try {
+ JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+ if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_SYSTEM) {
+ Log.w(TAG, "cannot set system folder");
+ } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_FOLDER) {
+ // for folder we can only update the snnipet and type
+ String snippet = note.has(NoteColumns.SNIPPET) ? note
+ .getString(NoteColumns.SNIPPET) : "";
+ // 如果没有创建或者该摘要没有匹配原摘要则将其加入解析器
+ if (mIsCreate || !mSnippet.equals(snippet)) {
+ mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
+ }
+ mSnippet = snippet;
+
+ int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
+ : Notes.TYPE_NOTE;
+ if (mIsCreate || mType != type) {
+ mDiffNoteValues.put(NoteColumns.TYPE, type);
+ }
+ mType = type;
+ } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_NOTE) {
+ // 获取便签提示日期
+ JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+ long id = note.has(NoteColumns.ID) ? note.getLong(NoteColumns.ID) : INVALID_ID;
+ if (mIsCreate || mId != id) {
+ mDiffNoteValues.put(NoteColumns.ID, id);
+ }
+ mId = id;
+ // 获取数据的提醒日期
+ long alertDate = note.has(NoteColumns.ALERTED_DATE) ? note
+ .getLong(NoteColumns.ALERTED_DATE) : 0;
+ if (mIsCreate || mAlertDate != alertDate) {
+ mDiffNoteValues.put(NoteColumns.ALERTED_DATE, alertDate);
+ }
+ mAlertDate = alertDate;
+ // 获取数据的背景颜色
+ int bgColorId = note.has(NoteColumns.BG_COLOR_ID) ? note
+ .getInt(NoteColumns.BG_COLOR_ID) : ResourceParser.getDefaultBgId(mContext);
+ if (mIsCreate || mBgColorId != bgColorId) {
+ mDiffNoteValues.put(NoteColumns.BG_COLOR_ID, bgColorId);
+ }
+ mBgColorId = bgColorId;
+ // 对创建日期操作
+ long createDate = note.has(NoteColumns.CREATED_DATE) ? note
+ .getLong(NoteColumns.CREATED_DATE) : System.currentTimeMillis();
+ if (mIsCreate || mCreatedDate != createDate) {
+ mDiffNoteValues.put(NoteColumns.CREATED_DATE, createDate);
+ }
+ mCreatedDate = createDate;
+
+ int hasAttachment = note.has(NoteColumns.HAS_ATTACHMENT) ? note
+ .getInt(NoteColumns.HAS_ATTACHMENT) : 0;
+ if (mIsCreate || mHasAttachment != hasAttachment) {
+ mDiffNoteValues.put(NoteColumns.HAS_ATTACHMENT, hasAttachment);
+ }
+ mHasAttachment = hasAttachment;
+ // 获取数据的修改日期
+ long modifiedDate = note.has(NoteColumns.MODIFIED_DATE) ? note
+ .getLong(NoteColumns.MODIFIED_DATE) : System.currentTimeMillis();
+ // 如果只是通过上下文对note进行数据库操作，或者该修改日期与原修改日期不相同
+ if (mIsCreate || mModifiedDate != modifiedDate) {
+ mDiffNoteValues.put(NoteColumns.MODIFIED_DATE, modifiedDate);
+ }
+ mModifiedDate = modifiedDate;
+ // 获取数据的父节点ID
+ long parentId = note.has(NoteColumns.PARENT_ID) ? note
+ .getLong(NoteColumns.PARENT_ID) : 0;
+ if (mIsCreate || mParentId != parentId) {
+ mDiffNoteValues.put(NoteColumns.PARENT_ID, parentId);
+ }
+ mParentId = parentId;
+
+ String snippet = note.has(NoteColumns.SNIPPET) ? note
+ .getString(NoteColumns.SNIPPET) : "";
+ // 如果只是通过上下文对note进行数据库操作，或者该文本片段与原文本片段不相同
+ if (mIsCreate || !mSnippet.equals(snippet)) {
+ mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
+ }
+ mSnippet = snippet;
+
+ int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
+ : Notes.TYPE_NOTE;
+ if (mIsCreate || mType != type) {
+ mDiffNoteValues.put(NoteColumns.TYPE, type);
+ }
+ mType = type;
+
+ int widgetId = note.has(NoteColumns.WIDGET_ID) ? note.getInt(NoteColumns.WIDGET_ID)
+ : AppWidgetManager.INVALID_APPWIDGET_ID;
+ if (mIsCreate || mWidgetId != widgetId) {
+ mDiffNoteValues.put(NoteColumns.WIDGET_ID, widgetId);
+ }
+ mWidgetId = widgetId;
+ // 获取数据的小部件种类
+ int widgetType = note.has(NoteColumns.WIDGET_TYPE) ? note
+ .getInt(NoteColumns.WIDGET_TYPE) : Notes.TYPE_WIDGET_INVALIDE;
+ if (mIsCreate || mWidgetType != widgetType) {
+ mDiffNoteValues.put(NoteColumns.WIDGET_TYPE, widgetType);
+ }
+ // 将该小部件种类覆盖原小部件种类
+ mWidgetType = widgetType;
+
+ long originParent = note.has(NoteColumns.ORIGIN_PARENT_ID) ? note
+ .getLong(NoteColumns.ORIGIN_PARENT_ID) : 0;
+ if (mIsCreate || mOriginParent != originParent) {
+ mDiffNoteValues.put(NoteColumns.ORIGIN_PARENT_ID, originParent);
+ }
+ mOriginParent = originParent;
+ // 遍历 dataArray，查找 id 为 dataId 的数据
+ for (int i = 0; i < dataArray.length(); i++) {
+ JSONObject data = dataArray.getJSONObject(i);
+ SqlData sqlData = null;
+ if (data.has(DataColumns.ID)) {
+ long dataId = data.getLong(DataColumns.ID);
+ for (SqlData temp : mDataList) {
+ if (dataId == temp.getId()) {
+ sqlData = temp;
+ }
+ }
+ }
+
+ // 如果数据库数据没有进行更新，就根据上下文创建一个数据库数据，并添加到数据列表中
+ if (sqlData == null) {
+ sqlData = new SqlData(mContext);
+ mDataList.add(sqlData);
+ }
+
+ // 最后为数据库数据进行设置
+ sqlData.setContent(data);
+ }
+ }
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ return false;
+ }
+ return true;
+ }
+ // 获取content机制提供的数据并加载到note中
+ public JSONObject getContent() {
+ try {
+ JSONObject js = new JSONObject();
+
+ if (mIsCreate) {
+ Log.e(TAG, "it seems that we haven't created this in database yet");
+ return null;
+ }
+
+ JSONObject note = new JSONObject();
+ //类型为note时
+ if (mType == Notes.TYPE_NOTE) {
+ note.put(NoteColumns.ID, mId);
+ note.put(NoteColumns.ALERTED_DATE, mAlertDate);
+ note.put(NoteColumns.BG_COLOR_ID, mBgColorId);
+ note.put(NoteColumns.CREATED_DATE, mCreatedDate);
+ note.put(NoteColumns.HAS_ATTACHMENT, mHasAttachment);
+ note.put(NoteColumns.MODIFIED_DATE, mModifiedDate);
+ note.put(NoteColumns.PARENT_ID, mParentId);
+ note.put(NoteColumns.SNIPPET, mSnippet);
+ note.put(NoteColumns.TYPE, mType);
+ note.put(NoteColumns.WIDGET_ID, mWidgetId);
+ note.put(NoteColumns.WIDGET_TYPE, mWidgetType);
+ note.put(NoteColumns.ORIGIN_PARENT_ID, mOriginParent);
+ js.put(GTaskStringUtils.META_HEAD_NOTE, note);
+
+ // 获取数据库数据，并存入数组中
+ JSONArray dataArray = new JSONArray();
+ // 将note中的data全部存入JSONArray中
+ for (SqlData sqlData : mDataList) {
+ JSONObject data = sqlData.getContent();
+ if (data != null) {
+ dataArray.put(data);
+ }
+ }
+ js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);
+ } else if (mType == Notes.TYPE_FOLDER || mType == Notes.TYPE_SYSTEM) {
+ note.put(NoteColumns.ID, mId);
+ note.put(NoteColumns.TYPE, mType);
+ note.put(NoteColumns.SNIPPET, mSnippet);
+ js.put(GTaskStringUtils.META_HEAD_NOTE, note);
+ }
+
+ return js;
+ } catch (JSONException e) {
+ // 捕获json类型异常，显示错误，打印堆栈痕迹
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ }
+ return null;
+ }
+ // 给当前id设置父id
+ public void setParentId(long id) {
+ mParentId = id;
+ mDiffNoteValues.put(NoteColumns.PARENT_ID, id);
+ }
+ // 给当前id设置Gtaskid
+ public void setGtaskId(String gid) {
+ mDiffNoteValues.put(NoteColumns.GTASK_ID, gid);
+ }
+
+ public void setSyncId(long syncId) {
+ mDiffNoteValues.put(NoteColumns.SYNC_ID, syncId);
+ }
+ // 功能描述：初始化本地修改，即撤销所有当前修改
+ public void resetLocalModified() {
+ mDiffNoteValues.put(NoteColumns.LOCAL_MODIFIED, 0);
+ }
+ // 获得当前id
+ public long getId() {
+ return mId;
+ }
+ // 获得当前id的父id
+ public long getParentId() {
+ return mParentId;
+ }
+ // 获取小片段即用于显示的部分便签内容
+ public String getSnippet() {
+ return mSnippet;
+ }
+ // 判断是否为便签类型
+ public boolean isNoteType() {
+ return mType == Notes.TYPE_NOTE;
+ }
+ // commit函数用于把当前造作所做的修改保存到数据库
+ public void commit(boolean validateVersion) {
+ if (mIsCreate) {
+ if (mId == INVALID_ID && mDiffNoteValues.containsKey(NoteColumns.ID)) {
+ mDiffNoteValues.remove(NoteColumns.ID);
+ }
+
+ Uri uri = mContentResolver.insert(Notes.CONTENT_NOTE_URI, mDiffNoteValues);
+ try {
+ mId = Long.valueOf(uri.getPathSegments().get(1));
+ } catch (NumberFormatException e) {
+ // 捕获异常，转换出错，显示错误“获取note的id出现错误”
+ Log.e(TAG, "Get note id error :" + e.toString());
+ throw new ActionFailureException("create note failed");
+ }
+ if (mId == 0) {
+ throw new IllegalStateException("Create thread id failed");
+ }
+
+ if (mType == Notes.TYPE_NOTE) {
+ for (SqlData sqlData : mDataList) {
+ sqlData.commit(mId, false, -1);
+ }
+ }
+ } else {
+ // 如果该便签ID是无效ID，报错：没有这个便签
+ if (mId <= 0 && mId != Notes.ID_ROOT_FOLDER && mId != Notes.ID_CALL_RECORD_FOLDER) {
+ Log.e(TAG, "No such note");
+ throw new IllegalStateException("Try to update note with invalid id");
+ }
+ if (mDiffNoteValues.size() > 0) {
+ // 更新版本：版本升级一个等级
+ mVersion ++;
+ int result = 0;
+ if (!validateVersion) {
+ result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
+ + NoteColumns.ID + "=?)", new String[] {
+ String.valueOf(mId)
+ });
+ } else {
+ result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
+ + NoteColumns.ID + "=?) AND (" + NoteColumns.VERSION + "<=?)",
+ new String[] {
+ String.valueOf(mId), String.valueOf(mVersion)
+ });
+ }
+ // 如果内容解析器没有更新，那么报错：没有更新，或许用户在同步时进行更新
+ if (result == 0) {
+ Log.w(TAG, "there is no update. maybe user updates note when syncing");
+ }
+ }
+
+ if (mType == Notes.TYPE_NOTE) {
+ for (SqlData sqlData : mDataList) {
+ sqlData.commit(mId, validateVersion, mVersion);
+ }
+ }
+ }
+
+ // refresh local info
+ // 更新本地信息
+ loadFromCursor(mId);
+ if (mType == Notes.TYPE_NOTE)
+ loadDataContent();
+
+ // 清空，回到初始化状态
+ mDiffNoteValues.clear();
+ // 改变数据库构造模式
+ mIsCreate = false;
+ }
+}
\ No newline at end of file
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/Task.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/Task.java
new file mode 100644
index 0000000..6663a8b
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/Task.java
@@ -0,0 +1,377 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+import android.text.TextUtils;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.DataConstants;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.tool.GTaskStringUtils;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+
+public class Task extends Node {
+ private static final String TAG = Task.class.getSimpleName();
+
+ private boolean mCompleted;
+
+ private String mNotes;
+
+ private JSONObject mMetaInfo;
+
+ private Task mPriorSibling;
+
+ private TaskList mParent;
+
+ public Task() {
+ super();
+ mCompleted = false;
+ mNotes = null;
+ mPriorSibling = null;
+ mParent = null;
+ mMetaInfo = null;
+ }
+
+ // 创建行动
+ public JSONObject getCreateAction(int actionId) {
+ JSONObject js = new JSONObject();
+
+ try {
+ // action_type
+ js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+ GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE);
+
+ // action_id
+ js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+
+ // index
+ js.put(GTaskStringUtils.GTASK_JSON_INDEX, mParent.getChildTaskIndex(this));
+
+ // entity_delta
+ JSONObject entity = new JSONObject();
+ entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
+ entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null");
+ entity.put(GTaskStringUtils.GTASK_JSON_ENTITY_TYPE,
+ GTaskStringUtils.GTASK_JSON_TYPE_TASK);
+ if (getNotes() != null) {
+ entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes());
+ }
+ js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
+
+ // parent_id
+ js.put(GTaskStringUtils.GTASK_JSON_PARENT_ID, mParent.getGid());
+
+ // dest_parent_type
+ js.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT_TYPE,
+ GTaskStringUtils.GTASK_JSON_TYPE_GROUP);
+
+ // list_id
+ js.put(GTaskStringUtils.GTASK_JSON_LIST_ID, mParent.getGid());
+
+ // prior_sibling_id
+ if (mPriorSibling != null) {
+ js.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, mPriorSibling.getGid());
+ }
+
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("fail to generate task-create jsonobject");
+ }
+
+ return js;
+ }
+
+ // 表示具有给定actionId的任务的更新操作。它包括操作类型、操作ID和实体δ
+ public JSONObject getUpdateAction(int actionId) {
+ JSONObject js = new JSONObject();
+
+ try {
+ // action_type
+ // 行动方式
+ js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+ GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE);
+
+ // action_id
+ // 行动方式
+ js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+
+ // id
+
+ js.put(GTaskStringUtils.GTASK_JSON_ID, getGid());
+
+ // entity_delta
+ // 实体δ
+ JSONObject entity = new JSONObject();
+ entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
+ if (getNotes() != null) {
+ entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes());
+ }
+ entity.put(GTaskStringUtils.GTASK_JSON_DELETED, getDeleted());
+ js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
+
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("fail to generate task-update jsonobject");
+ }
+
+ return js;
+ }
+
+
+ // 基于从Google Tasks API接收到的JSON对象设置任务的内容。它解析JSON对象，并相应地设置任务属性
+ public void setContentByRemoteJSON(JSONObject js) {
+ if (js != null) {
+ try {
+ // id
+ if (js.has(GTaskStringUtils.GTASK_JSON_ID)) {
+ setGid(js.getString(GTaskStringUtils.GTASK_JSON_ID));
+ }
+
+ // last_modified
+ if (js.has(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)) {
+ setLastModified(js.getLong(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED));
+ }
+
+ // name
+ if (js.has(GTaskStringUtils.GTASK_JSON_NAME)) {
+ setName(js.getString(GTaskStringUtils.GTASK_JSON_NAME));
+ }
+
+ // notes
+ if (js.has(GTaskStringUtils.GTASK_JSON_NOTES)) {
+ setNotes(js.getString(GTaskStringUtils.GTASK_JSON_NOTES));
+ }
+
+ // deleted
+ if (js.has(GTaskStringUtils.GTASK_JSON_DELETED)) {
+ setDeleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_DELETED));
+ }
+
+ // completed
+ if (js.has(GTaskStringUtils.GTASK_JSON_COMPLETED)) {
+ setCompleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_COMPLETED));
+ }
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("fail to get task content from jsonobject");
+ }
+ }
+ }
+
+
+ // 于在应用程序中本地存储的JSON对象设置任务的内容。
+ // 预期JSON对象具有特定的格式，包括一个笔记和数据数组。该方法解析JSON对象，并根据具有“note” MIME类型的第一个数据项设置任务名称
+ public void setContentByLocalJSON(JSONObject js) {
+ if (js == null || !js.has(GTaskStringUtils.META_HEAD_NOTE)
+ || !js.has(GTaskStringUtils.META_HEAD_DATA)) {
+ Log.w(TAG, "setContentByLocalJSON: nothing is avaiable");
+ }
+
+ try {
+ JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+ JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+
+ if (note.getInt(NoteColumns.TYPE) != Notes.TYPE_NOTE) {
+ Log.e(TAG, "invalid type");
+ return;
+ }
+
+ for (int i = 0; i < dataArray.length(); i++) {
+ JSONObject data = dataArray.getJSONObject(i);
+ if (TextUtils.equals(data.getString(DataColumns.MIME_TYPE), DataConstants.NOTE)) {
+ setName(data.getString(DataColumns.CONTENT));
+ break;
+ }
+ }
+
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ }
+ }
+
+ //该方法创建一个JSON对象，其中包含笔记的内容和元数据，可以是本地创建的新笔记，也可以是已与远程服务器同步的笔记。
+ // 如果注释是新的，它会创建一个新的JSON对象，并将注释的内容添加到该对象中。
+ // 如果之前已经同步过该笔记，它将使用新内容更新JSON对象。该方法返回结果JSON对象，如果有错误则返回null
+ public JSONObject getLocalJSONFromContent() {
+ String name = getName();
+ try {
+ if (mMetaInfo == null) {
+ // new task created from web
+ if (name == null) {
+ Log.w(TAG, "the note seems to be an empty one");
+ return null;
+ }
+
+ JSONObject js = new JSONObject();
+ JSONObject note = new JSONObject();
+ JSONArray dataArray = new JSONArray();
+ JSONObject data = new JSONObject();
+ data.put(DataColumns.CONTENT, name);
+ dataArray.put(data);
+ js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);
+ note.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
+ js.put(GTaskStringUtils.META_HEAD_NOTE, note);
+ return js;
+ } else {
+ // synced task
+ JSONObject note = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+ JSONArray dataArray = mMetaInfo.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+
+ for (int i = 0; i < dataArray.length(); i++) {
+ JSONObject data = dataArray.getJSONObject(i);
+ if (TextUtils.equals(data.getString(DataColumns.MIME_TYPE), DataConstants.NOTE)) {
+ data.put(DataColumns.CONTENT, getName());
+ break;
+ }
+ }
+
+ note.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
+ return mMetaInfo;
+ }
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ return null;
+ }
+ }
+
+
+ // 该方法设置注释的元数据。元数据作为元数据对象传递，然后转换为JSON对象并存储在mMetaInfo实例变量中。
+ public void setMetaInfo(MetaData metaData) {
+ if (metaData != null && metaData.getNotes() != null) {
+ try {
+ mMetaInfo = new JSONObject(metaData.getNotes());
+ } catch (JSONException e) {
+ Log.w(TAG, e.toString());
+ mMetaInfo = null;
+ }
+ }
+ }
+
+
+ // 该方法根据注释的本地和远程状态确定需要对其采取的同步操作。
+ // SYNC_ACTION_NONE:不需要同步操作，因为两边都没有更新。
+ // SYNC_ACTION_UPDATE_REMOTE:使用本地更改更新远程服务器。
+ // SYNC_ACTION_UPDATE_LOCAL:使用来自远程服务器的更改更新本地注释。
+ // SYNC_ACTION_UPDATE_CONFLICT:双方都有冲突的更新，因此需要解决同步问题。
+ // SYNC_ACTION_ERROR:在确定同步操作时发生错误
+ public int getSyncAction(Cursor c) {
+ try {
+ JSONObject noteInfo = null;
+ if (mMetaInfo != null && mMetaInfo.has(GTaskStringUtils.META_HEAD_NOTE)) {
+ noteInfo = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+ }
+
+ if (noteInfo == null) {
+ Log.w(TAG, "it seems that note meta has been deleted");
+ return SYNC_ACTION_UPDATE_REMOTE;
+ }
+
+ if (!noteInfo.has(NoteColumns.ID)) {
+ Log.w(TAG, "remote note id seems to be deleted");
+ return SYNC_ACTION_UPDATE_LOCAL;
+ }
+
+ // validate the note id now
+ if (c.getLong(SqlNote.ID_COLUMN) != noteInfo.getLong(NoteColumns.ID)) {
+ Log.w(TAG, "note id doesn't match");
+ return SYNC_ACTION_UPDATE_LOCAL;
+ }
+
+ if (c.getInt(SqlNote.LOCAL_MODIFIED_COLUMN) == 0) {
+ // there is no local update
+ if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+ // no update both side
+ return SYNC_ACTION_NONE;
+ } else {
+ // apply remote to local
+ return SYNC_ACTION_UPDATE_LOCAL;
+ }
+ } else {
+ // validate gtask id
+ if (!c.getString(SqlNote.GTASK_ID_COLUMN).equals(getGid())) {
+ Log.e(TAG, "gtask id doesn't match");
+ return SYNC_ACTION_ERROR;
+ }
+ if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+ // local modification only
+ return SYNC_ACTION_UPDATE_REMOTE;
+ } else {
+ return SYNC_ACTION_UPDATE_CONFLICT;
+ }
+ }
+ } catch (Exception e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ }
+
+ return SYNC_ACTION_ERROR;
+ }
+
+ /*
+ 类的基本定义
+ */
+ public boolean isWorthSaving() {
+ return mMetaInfo != null || (getName() != null && getName().trim().length() > 0)
+ || (getNotes() != null && getNotes().trim().length() > 0);
+ }
+
+ public void setCompleted(boolean completed) {
+ this.mCompleted = completed;
+ }
+
+ public void setNotes(String notes) {
+ this.mNotes = notes;
+ }
+
+ public void setPriorSibling(Task priorSibling) {
+ this.mPriorSibling = priorSibling;
+ }
+
+ public void setParent(TaskList parent) {
+ this.mParent = parent;
+ }
+
+ public boolean getCompleted() {
+ return this.mCompleted;
+ }
+
+ public String getNotes() {
+ return this.mNotes;
+ }
+
+ public Task getPriorSibling() {
+ return this.mPriorSibling;
+ }
+
+ public TaskList getParent() {
+ return this.mParent;
+ }
+
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/TaskList.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/TaskList.java
new file mode 100644
index 0000000..dbf3fd0
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/data/TaskList.java
@@ -0,0 +1,394 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.tool.GTaskStringUtils;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+
+
+public class TaskList extends Node {
+ private static final String TAG = TaskList.class.getSimpleName();
+
+ private int mIndex;
+
+ private ArrayList mChildren;
+
+ // 构造函数
+ public TaskList() {
+ super();
+ mChildren = new ArrayList();
+ mIndex = 1;
+ }
+
+
+ // 创建一个动作
+ public JSONObject getCreateAction(int actionId) {
+ JSONObject js = new JSONObject();
+
+ try {
+ // action_type
+ js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+ GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE);
+
+ // action_id
+ js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+
+ // index
+ js.put(GTaskStringUtils.GTASK_JSON_INDEX, mIndex);
+
+ // entity_delta
+ JSONObject entity = new JSONObject();
+ entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
+ entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null");
+ entity.put(GTaskStringUtils.GTASK_JSON_ENTITY_TYPE,
+ GTaskStringUtils.GTASK_JSON_TYPE_GROUP);
+ js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
+
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("fail to generate tasklist-create jsonobject");
+ }
+
+ return js;
+ }
+
+ /*
+ 创建一个用于更新任务列表的JSON对象。
+ 它接受一个actionId作为参数，并返回一个JSONObject，该JSONObject包括操作类型、操作ID、任务列表ID和一个带有任务列表实体更新信息的JSON对象。更新的信息包括任务列表的名称和删除状态。
+ */
+ public JSONObject getUpdateAction(int actionId) {
+ JSONObject js = new JSONObject();
+
+ try {
+ // action_type
+ js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+ GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE);
+
+ // action_id
+ js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+
+ // id
+ js.put(GTaskStringUtils.GTASK_JSON_ID, getGid());
+
+ // entity_delta
+ JSONObject entity = new JSONObject();
+ entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
+ entity.put(GTaskStringUtils.GTASK_JSON_DELETED, getDeleted());
+ js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
+
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("fail to generate tasklist-update jsonobject");
+ }
+
+ return js;
+ }
+
+
+ // 远程JSON对象设置任务列表的内容。
+ // 它接受JSONObject作为参数，并从中提取ID、最后修改的时间戳和任务列表的名称。如果JSON对象中缺少这些字段中的任何一个，则抛出JSONException。
+ public void setContentByRemoteJSON(JSONObject js) {
+ if (js != null) {
+ try {
+ // id
+ if (js.has(GTaskStringUtils.GTASK_JSON_ID)) {
+ setGid(js.getString(GTaskStringUtils.GTASK_JSON_ID));
+ }
+
+ // last_modified
+ if (js.has(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)) {
+ setLastModified(js.getLong(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED));
+ }
+
+ // name
+ if (js.has(GTaskStringUtils.GTASK_JSON_NAME)) {
+ setName(js.getString(GTaskStringUtils.GTASK_JSON_NAME));
+ }
+
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("fail to get tasklist content from jsonobject");
+ }
+ }
+ }
+
+ /*
+ 本地JSON对象设置文件夹的内容。它接受JSONObject作为参数，并从中提取文件夹的名称和类型。
+ 如果文件夹是用户创建的文件夹，则其名称前缀为常量字符串。如果文件夹是系统文件夹，它的名称将匹配一些预定义的系统文件夹名称，并相应地设置其类型。
+ */
+ public void setContentByLocalJSON(JSONObject js) {
+ if (js == null || !js.has(GTaskStringUtils.META_HEAD_NOTE)) {
+ Log.w(TAG, "setContentByLocalJSON: nothing is avaiable");
+ }
+
+ try {
+ JSONObject folder = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+
+ if (folder.getInt(NoteColumns.TYPE) == Notes.TYPE_FOLDER) {
+ String name = folder.getString(NoteColumns.SNIPPET);
+ setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX + name);
+ } else if (folder.getInt(NoteColumns.TYPE) == Notes.TYPE_SYSTEM) {
+ if (folder.getLong(NoteColumns.ID) == Notes.ID_ROOT_FOLDER)
+ setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT);
+ else if (folder.getLong(NoteColumns.ID) == Notes.ID_CALL_RECORD_FOLDER)
+ setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+ + GTaskStringUtils.FOLDER_CALL_NOTE);
+ else
+ Log.e(TAG, "invalid system folder");
+ } else {
+ Log.e(TAG, "error type");
+ }
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ }
+ }
+
+
+ /*
+ 基于文件夹的内容创建一个本地JSON对象。
+ 它创建了一个JSONObject，该JSONObject包含文件夹名称和类型的JSONObject。
+ */
+ public JSONObject getLocalJSONFromContent() {
+ try {
+ JSONObject js = new JSONObject();
+ JSONObject folder = new JSONObject();
+
+ String folderName = getName();
+ if (getName().startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX))
+ folderName = folderName.substring(GTaskStringUtils.MIUI_FOLDER_PREFFIX.length(),
+ folderName.length());
+ folder.put(NoteColumns.SNIPPET, folderName);
+ if (folderName.equals(GTaskStringUtils.FOLDER_DEFAULT)
+ || folderName.equals(GTaskStringUtils.FOLDER_CALL_NOTE))
+ folder.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+ else
+ folder.put(NoteColumns.TYPE, Notes.TYPE_FOLDER);
+
+ js.put(GTaskStringUtils.META_HEAD_NOTE, folder);
+
+ return js;
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ return null;
+ }
+ }
+
+ /*
+ 根据包含文件夹信息的Cursor对象确定对文件夹采取的同步操作。
+ 如果文件夹未被本地修改，且其最后一次修改时间戳与远程版本的时间戳匹配，则该方法返回SYNC_ACTION_NONE。
+ 如果文件夹尚未在本地修改，但其最后一次修改时间戳与远程版本的时间戳不匹配，则该方法返回SYNC_ACTION_UPDATE_LOCAL。
+ 如果文件夹已在本地修改，且其gtask ID与远程版本的ID匹配，则该方法返回SYNC_ACTION_UPDATE_REMOTE。
+ 否则，该方法返回SYNC_ACTION_ERROR。
+ */
+ public int getSyncAction(Cursor c) {
+ try {
+ if (c.getInt(SqlNote.LOCAL_MODIFIED_COLUMN) == 0) {
+ // there is no local update
+ if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+ // no update both side
+ return SYNC_ACTION_NONE;
+ } else {
+ // apply remote to local
+ return SYNC_ACTION_UPDATE_LOCAL;
+ }
+ } else {
+ // validate gtask id
+ if (!c.getString(SqlNote.GTASK_ID_COLUMN).equals(getGid())) {
+ Log.e(TAG, "gtask id doesn't match");
+ return SYNC_ACTION_ERROR;
+ }
+ if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+ // local modification only
+ return SYNC_ACTION_UPDATE_REMOTE;
+ } else {
+ // for folder conflicts, just apply local modification
+ return SYNC_ACTION_UPDATE_REMOTE;
+ }
+ }
+ } catch (Exception e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ }
+
+ return SYNC_ACTION_ERROR;
+ }
+
+ // 返回当前任务拥有的子任务的数量。
+ public int getChildTaskCount() {
+ return mChildren.size();
+ }
+
+ /*
+ 向子任务列表中添加一个新的子任务。
+ 如果子任务不为空且不在列表中，则会添加它。如果子任务添加成功，该方法返回true，否则返回false。
+ */
+ public boolean addChildTask(Task task) {
+ boolean ret = false;
+ if (task != null && !mChildren.contains(task)) {
+ ret = mChildren.add(task);
+ if (ret) {
+ // need to set prior sibling and parent
+ task.setPriorSibling(mChildren.isEmpty() ? null : mChildren
+ .get(mChildren.size() - 1));
+ task.setParent(this);
+ }
+ }
+ return ret;
+ }
+
+
+ /*
+ 接受一个可选的索引参数，用于指定应该插入子任务的列表位置。
+ 如果索引超出范围，则该方法返回false。如果索引有效，子任务将被插入指定位置，现有任务将被移动以腾出空间。
+ 如果子任务成功插入，该方法返回true，否则返回false。
+ */
+ public boolean addChildTask(Task task, int index) {
+ if (index < 0 || index > mChildren.size()) {
+ Log.e(TAG, "add child task: invalid index");
+ return false;
+ }
+
+ int pos = mChildren.indexOf(task);
+ if (task != null && pos == -1) {
+ mChildren.add(index, task);
+
+ // update the task list
+ Task preTask = null;
+ Task afterTask = null;
+ if (index != 0)
+ preTask = mChildren.get(index - 1);
+ if (index != mChildren.size() - 1)
+ afterTask = mChildren.get(index + 1);
+
+ task.setPriorSibling(preTask);
+ if (afterTask != null)
+ afterTask.setPriorSibling(task);
+ }
+
+ return true;
+ }
+
+
+ /*
+ 从子任务列表中移除一个子任务。
+ 如果任务不在列表中，该方法返回false。
+ 如果任务在列表中，它将被删除，剩余的任务将被移动以填补空白。
+ 如果任务被成功移除，该方法返回true，否则返回false。
+ */
+ public boolean removeChildTask(Task task) {
+ boolean ret = false;
+ int index = mChildren.indexOf(task);
+ if (index != -1) {
+ ret = mChildren.remove(task);
+
+ if (ret) {
+ // reset prior sibling and parent
+ task.setPriorSibling(null);
+ task.setParent(null);
+
+ // update the task list
+ if (index != mChildren.size()) {
+ mChildren.get(index).setPriorSibling(
+ index == 0 ? null : mChildren.get(index - 1));
+ }
+ }
+ }
+ return ret;
+ }
+
+ // 将子任务移动到子任务列表中的新位置。
+ public boolean moveChildTask(Task task, int index) {
+
+ if (index < 0 || index >= mChildren.size()) {
+ Log.e(TAG, "move child task: invalid index");
+ return false;
+ }
+
+ int pos = mChildren.indexOf(task);
+ if (pos == -1) {
+ Log.e(TAG, "move child task: the task should in the list");
+ return false;
+ }
+
+ if (pos == index)
+ return true;
+ return (removeChildTask(task) && addChildTask(task, index));
+ }
+
+ // 查找具有特定GID(全局标识符)的子任务并返回它
+ public Task findChildTaskByGid(String gid) {
+ for (int i = 0; i < mChildren.size(); i++) {
+ Task t = mChildren.get(i);
+ if (t.getGid().equals(gid)) {
+ return t;
+ }
+ }
+ return null;
+ }
+
+ //返回子任务列表中子任务的索引。
+ public int getChildTaskIndex(Task task) {
+ return mChildren.indexOf(task);
+ }
+
+ // 返回指定索引的子任务。如果索引无效，则返回null。
+ public Task getChildTaskByIndex(int index) {
+ if (index < 0 || index >= mChildren.size()) {
+ Log.e(TAG, "getTaskByIndex: invalid index");
+ return null;
+ }
+ return mChildren.get(index);
+ }
+
+ // 返回具有特定GID的子任务。
+ // 如果没有找到任务，则返回null。
+ public Task getChilTaskByGid(String gid) {
+ for (Task task : mChildren) {
+ if (task.getGid().equals(gid))
+ return task;
+ }
+ return null;
+ }
+
+
+ public ArrayList getChildTaskList() {
+ return this.mChildren;
+ }
+
+ public void setIndex(int index) {
+ this.mIndex = index;
+ }
+
+ public int getIndex() {
+ return this.mIndex;
+ }
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/exception/ActionFailureException.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/exception/ActionFailureException.java
new file mode 100644
index 0000000..1c1adb1
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/exception/ActionFailureException.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.exception;
+
+// ActionFailureException 继承 RuntimeException
+// 为操作失败的情况，检查异常 显式地捕获或在方法的throws子句中声明
+public class ActionFailureException extends RuntimeException {
+ private static final long serialVersionUID = 4425249765923293627L;
+
+ public ActionFailureException() {
+ super();
+ }
+
+ public ActionFailureException(String paramString) {
+ super(paramString);
+ }
+
+ public ActionFailureException(String paramString, Throwable paramThrowable) {
+ super(paramString, paramThrowable);
+ }
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/exception/NetworkFailureException.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/exception/NetworkFailureException.java
new file mode 100644
index 0000000..615f4cb
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/exception/NetworkFailureException.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.exception;
+
+//
+public class NetworkFailureException extends Exception {
+ private static final long serialVersionUID = 2107610287180234136L;
+
+ // 这是一个默认构造函数，调用父类的默认构造函数
+ public NetworkFailureException() {
+ super();
+ }
+
+ // 该构造函数接受一个字符串参数，表示与异常关联的错误消息
+ public NetworkFailureException(String paramString) {
+ super(paramString);
+ }
+
+ // 该构造函数接受两个参数:表示错误消息的字符串和表示异常原因的Throwable对象
+ public NetworkFailureException(String paramString, Throwable paramThrowable) {
+ super(paramString, paramThrowable);
+ }
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskASyncTask.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskASyncTask.java
new file mode 100644
index 0000000..c0cd073
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskASyncTask.java
@@ -0,0 +1,133 @@
+
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.remote;
+
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.os.AsyncTask;
+
+import net.micode.notes.R;
+import net.micode.notes.ui.NotesListActivity;
+import net.micode.notes.ui.NotesPreferenceActivity;
+
+
+public class GTaskASyncTask extends AsyncTask {
+
+ private static int GTASK_SYNC_NOTIFICATION_ID = 5234235;
+
+ public interface OnCompleteListener {
+ void onComplete();
+ }
+
+ private Context mContext;
+
+ private NotificationManager mNotifiManager;
+
+ private GTaskManager mTaskManager;
+
+ private OnCompleteListener mOnCompleteListener;
+
+
+ // 构造函数，初始化
+ public GTaskASyncTask(Context context, OnCompleteListener listener) {
+ mContext = context;
+ mOnCompleteListener = listener;
+ mNotifiManager = (NotificationManager) mContext
+ .getSystemService(Context.NOTIFICATION_SERVICE);
+ mTaskManager = GTaskManager.getInstance();
+ }
+
+ // 调用mTaskManager对象的cancelSync()方法来取消同步任务，mTaskManager对象是GTaskManager的实例
+ public void cancelSync() {
+ mTaskManager.cancelSync();
+ }
+
+
+ // 通过调用AsyncTask的publishProgress()方法来发布同步任务的进度
+ public void publishProgess(String message) {
+ publishProgress(new String[] {
+ message
+ });
+ }
+
+
+ // 同步期间向用户显示通知
+ private void showNotification(int tickerId, String content) {
+ Notification notification = new Notification(R.drawable.notification, mContext
+ .getString(tickerId), System.currentTimeMillis());
+ notification.defaults = Notification.DEFAULT_LIGHTS;
+ notification.flags = Notification.FLAG_AUTO_CANCEL;
+ PendingIntent pendingIntent;
+ if (tickerId != R.string.ticker_success) {
+ pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
+ NotesPreferenceActivity.class), 0);
+
+ } else {
+ pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
+ NotesListActivity.class), 0);
+ }
+ //notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content, pendingIntent);
+ mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
+ }
+
+
+ // 在后台执行同步任务
+ @Override
+ protected Integer doInBackground(Void... unused) {
+ publishProgess(mContext.getString(R.string.sync_progress_login, NotesPreferenceActivity
+ .getSyncAccountName(mContext)));
+ return mTaskManager.sync(mContext, this);
+ }
+
+ // 同步过程中更新通知消息
+ @Override
+ protected void onProgressUpdate(String... progress) {
+ showNotification(R.string.ticker_syncing, progress[0]);
+ if (mContext instanceof GTaskSyncService) {
+ ((GTaskSyncService) mContext).sendBroadcast(progress[0]);
+ }
+ }
+
+ // 在后台同步任务完成时被调用
+ @Override
+ protected void onPostExecute(Integer result) {
+ if (result == GTaskManager.STATE_SUCCESS) {
+ showNotification(R.string.ticker_success, mContext.getString(
+ R.string.success_sync_account, mTaskManager.getSyncAccount()));
+ NotesPreferenceActivity.setLastSyncTime(mContext, System.currentTimeMillis());
+ } else if (result == GTaskManager.STATE_NETWORK_ERROR) {
+ showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_network));
+ } else if (result == GTaskManager.STATE_INTERNAL_ERROR) {
+ showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_internal));
+ } else if (result == GTaskManager.STATE_SYNC_CANCELLED) {
+ showNotification(R.string.ticker_cancel, mContext
+ .getString(R.string.error_sync_cancelled));
+ }
+ if (mOnCompleteListener != null) {
+ new Thread(new Runnable() {
+
+ public void run() {
+ mOnCompleteListener.onComplete();
+ }
+ }).start();
+ }
+ }
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskClient.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskClient.java
new file mode 100644
index 0000000..4245d88
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskClient.java
@@ -0,0 +1,627 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.remote;
+
+import android.accounts.Account;
+import android.accounts.AccountManager;
+import android.accounts.AccountManagerFuture;
+import android.app.Activity;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.util.Log;
+
+import net.micode.notes.gtask.data.Node;
+import net.micode.notes.gtask.data.Task;
+import net.micode.notes.gtask.data.TaskList;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.gtask.exception.NetworkFailureException;
+import net.micode.notes.tool.GTaskStringUtils;
+import net.micode.notes.ui.NotesPreferenceActivity;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.ClientProtocolException;
+import org.apache.http.client.entity.UrlEncodedFormEntity;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.cookie.Cookie;
+import org.apache.http.impl.client.BasicCookieStore;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.params.BasicHttpParams;
+import org.apache.http.params.HttpConnectionParams;
+import org.apache.http.params.HttpParams;
+import org.apache.http.params.HttpProtocolParams;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.zip.GZIPInputStream;
+import java.util.zip.Inflater;
+import java.util.zip.InflaterInputStream;
+
+
+public class GTaskClient {
+ private static final String TAG = GTaskClient.class.getSimpleName();
+
+ // Gtask 一般请求的URL
+ private static final String GTASK_URL = "https://mail.google.com/tasks/";
+
+ // Gtask get请求的URL
+ private static final String GTASK_GET_URL = "https://mail.google.com/tasks/ig";
+
+ // Gtask post请求的URL
+ private static final String GTASK_POST_URL = "https://mail.google.com/tasks/r/ig";
+
+ private static GTaskClient mInstance = null;
+
+ private DefaultHttpClient mHttpClient;
+
+ private String mGetUrl;
+
+ private String mPostUrl;
+
+ private long mClientVersion;
+
+ private boolean mLoggedin;
+
+ private long mLastLoginTime;
+
+ private int mActionId;
+
+ private Account mAccount;
+
+ private JSONArray mUpdateArray;
+
+
+ // 构造函数，初始化各个变量
+ private GTaskClient() {
+ mHttpClient = null;
+ mGetUrl = GTASK_GET_URL;
+ mPostUrl = GTASK_POST_URL;
+ mClientVersion = -1;
+ mLoggedin = false;
+ mLastLoginTime = 0;
+ mActionId = 1;
+ mAccount = null;
+ mUpdateArray = null;
+ }
+
+ // 提供与Google任务交互的方法
+ public static synchronized GTaskClient getInstance() {
+ if (mInstance == null) {
+ mInstance = new GTaskClient();
+ }
+ return mInstance;
+ }
+
+ // 检查用户是否已经登录使用
+ // loginGoogleAccount()方法登录，该方法返回身份验证令牌。
+ // 然后，如果用户有自定义域名，该方法尝试使用用户的自定义域名登录，如果失败，则尝试使用Google官方网址登录
+ public boolean login(Activity activity) {
+ // we suppose that the cookie would expire after 5 minutes
+ // then we need to re-login
+ final long interval = 1000 * 60 * 5;
+ if (mLastLoginTime + interval < System.currentTimeMillis()) {
+ mLoggedin = false;
+ }
+
+ // need to re-login after account switch
+ if (mLoggedin
+ && !TextUtils.equals(getSyncAccount().name, NotesPreferenceActivity
+ .getSyncAccountName(activity))) {
+ mLoggedin = false;
+ }
+
+ if (mLoggedin) {
+ Log.d(TAG, "already logged in");
+ return true;
+ }
+
+ mLastLoginTime = System.currentTimeMillis();
+ String authToken = loginGoogleAccount(activity, false);
+ if (authToken == null) {
+ Log.e(TAG, "login google account failed");
+ return false;
+ }
+
+ // login with custom domain if necessary
+ if (!(mAccount.name.toLowerCase().endsWith("gmail.com") || mAccount.name.toLowerCase()
+ .endsWith("googlemail.com"))) {
+ StringBuilder url = new StringBuilder(GTASK_URL).append("a/");
+ int index = mAccount.name.indexOf('@') + 1;
+ String suffix = mAccount.name.substring(index);
+ url.append(suffix + "/");
+ mGetUrl = url.toString() + "ig";
+ mPostUrl = url.toString() + "r/ig";
+
+ if (tryToLoginGtask(activity, authToken)) {
+ mLoggedin = true;
+ }
+ }
+
+ // try to login with google official url
+ if (!mLoggedin) {
+ mGetUrl = GTASK_GET_URL;
+ mPostUrl = GTASK_POST_URL;
+ if (!tryToLoginGtask(activity, authToken)) {
+ return false;
+ }
+ }
+
+ mLoggedin = true;
+ return true;
+ }
+
+ // 使用AccountManager类登录Google账户
+ private String loginGoogleAccount(Activity activity, boolean invalidateToken) {
+ String authToken;
+ AccountManager accountManager = AccountManager.get(activity);
+ Account[] accounts = accountManager.getAccountsByType("com.google");
+
+ if (accounts.length == 0) {
+ Log.e(TAG, "there is no available google account");
+ return null;
+ }
+
+ String accountName = NotesPreferenceActivity.getSyncAccountName(activity);
+ Account account = null;
+ for (Account a : accounts) {
+ if (a.name.equals(accountName)) {
+ account = a;
+ break;
+ }
+ }
+ if (account != null) {
+ mAccount = account;
+ } else {
+ Log.e(TAG, "unable to get an account with the same name in the settings");
+ return null;
+ }
+
+ // get the token now
+ AccountManagerFuture accountManagerFuture = accountManager.getAuthToken(account,
+ "goanna_mobile", null, activity, null, null);
+ try {
+ Bundle authTokenBundle = accountManagerFuture.getResult();
+ authToken = authTokenBundle.getString(AccountManager.KEY_AUTHTOKEN);
+ if (invalidateToken) {
+ accountManager.invalidateAuthToken("com.google", authToken);
+ loginGoogleAccount(activity, false);
+ }
+ } catch (Exception e) {
+ Log.e(TAG, "get auth token failed");
+ authToken = null;
+ }
+
+ return authToken;
+ }
+
+ // 可能认证令牌已经过期，现在让我们使令牌无效并重试
+ private boolean tryToLoginGtask(Activity activity, String authToken) {
+ if (!loginGtask(authToken)) {
+ // maybe the auth token is out of date, now let's invalidate the
+ // token and try again
+ authToken = loginGoogleAccount(activity, true);
+ if (authToken == null) {
+ Log.e(TAG, "login google account failed");
+ return false;
+ }
+
+ if (!loginGtask(authToken)) {
+ Log.e(TAG, "login gtask failed");
+ return false;
+ }
+ }
+ return true;
+ }
+
+ // HttpClient类来登录Google任务
+ private boolean loginGtask(String authToken) {
+ int timeoutConnection = 10000;
+ int timeoutSocket = 15000;
+ HttpParams httpParameters = new BasicHttpParams();
+ HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
+ HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
+ mHttpClient = new DefaultHttpClient(httpParameters);
+ BasicCookieStore localBasicCookieStore = new BasicCookieStore();
+ mHttpClient.setCookieStore(localBasicCookieStore);
+ HttpProtocolParams.setUseExpectContinue(mHttpClient.getParams(), false);
+
+ // login gtask
+ try {
+ String loginUrl = mGetUrl + "?auth=" + authToken;
+ HttpGet httpGet = new HttpGet(loginUrl);
+ HttpResponse response = null;
+ response = mHttpClient.execute(httpGet);
+
+ // get the cookie now
+ List cookies = mHttpClient.getCookieStore().getCookies();
+ boolean hasAuthCookie = false;
+ for (Cookie cookie : cookies) {
+ if (cookie.getName().contains("GTL")) {
+ hasAuthCookie = true;
+ }
+ }
+ if (!hasAuthCookie) {
+ Log.w(TAG, "it seems that there is no auth cookie");
+ }
+
+ // get the client version
+ String resString = getResponseContent(response.getEntity());
+ String jsBegin = "_setup(";
+ String jsEnd = ")}";
+ int begin = resString.indexOf(jsBegin);
+ int end = resString.lastIndexOf(jsEnd);
+ String jsString = null;
+ if (begin != -1 && end != -1 && begin < end) {
+ jsString = resString.substring(begin + jsBegin.length(), end);
+ }
+ JSONObject js = new JSONObject(jsString);
+ mClientVersion = js.getLong("v");
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ return false;
+ } catch (Exception e) {
+ // simply catch all exceptions
+ Log.e(TAG, "httpget gtask_url failed");
+ return false;
+ }
+
+ return true;
+ }
+
+ private int getActionId() {
+ return mActionId++;
+ }
+
+ // 创建Http服务
+ private HttpPost createHttpPost() {
+ HttpPost httpPost = new HttpPost(mPostUrl);
+ httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
+ httpPost.setHeader("AT", "1");
+ return httpPost;
+ }
+
+ // 获取http请求，并且错误时抛出请求错误异常
+ private String getResponseContent(HttpEntity entity) throws IOException {
+ String contentEncoding = null;
+ if (entity.getContentEncoding() != null) {
+ contentEncoding = entity.getContentEncoding().getValue();
+ Log.d(TAG, "encoding: " + contentEncoding);
+ }
+
+ InputStream input = entity.getContent();
+ if (contentEncoding != null && contentEncoding.equalsIgnoreCase("gzip")) {
+ input = new GZIPInputStream(entity.getContent());
+ } else if (contentEncoding != null && contentEncoding.equalsIgnoreCase("deflate")) {
+ Inflater inflater = new Inflater(true);
+ input = new InflaterInputStream(entity.getContent(), inflater);
+ }
+
+ try {
+ InputStreamReader isr = new InputStreamReader(input);
+ BufferedReader br = new BufferedReader(isr);
+ StringBuilder sb = new StringBuilder();
+
+ while (true) {
+ String buff = br.readLine();
+ if (buff == null) {
+ return sb.toString();
+ }
+ sb = sb.append(buff);
+ }
+ } finally {
+ input.close();
+ }
+ }
+
+
+ // 获取post请求，错误时抛出网络异常请求
+ private JSONObject postRequest(JSONObject js) throws NetworkFailureException {
+ if (!mLoggedin) {
+ Log.e(TAG, "please login first");
+ throw new ActionFailureException("not logged in");
+ }
+
+ HttpPost httpPost = createHttpPost();
+ try {
+ LinkedList list = new LinkedList();
+ list.add(new BasicNameValuePair("r", js.toString()));
+ UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8");
+ httpPost.setEntity(entity);
+
+ // execute the post
+ HttpResponse response = mHttpClient.execute(httpPost);
+ String jsString = getResponseContent(response.getEntity());
+ return new JSONObject(jsString);
+
+ } catch (ClientProtocolException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new NetworkFailureException("postRequest failed");
+ } catch (IOException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new NetworkFailureException("postRequest failed");
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("unable to convert response content to jsonobject");
+ } catch (Exception e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("error occurs when posting request");
+ }
+ }
+
+
+ // 创建task请求，错误时抛出网络错误异常
+ public void createTask(Task task) throws NetworkFailureException {
+ commitUpdate();
+ try {
+ JSONObject jsPost = new JSONObject();
+ JSONArray actionList = new JSONArray();
+
+ // action_list
+ actionList.put(task.getCreateAction(getActionId()));
+ jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+ // client_version
+ jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+ // post
+ JSONObject jsResponse = postRequest(jsPost);
+ JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
+ GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
+ task.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
+
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("create task: handing jsonobject failed");
+ }
+ }
+
+
+ // 创建tasklist请求，错误时抛出网络错误异常
+ public void createTaskList(TaskList tasklist) throws NetworkFailureException {
+ commitUpdate();
+ try {
+ JSONObject jsPost = new JSONObject();
+ JSONArray actionList = new JSONArray();
+
+ // action_list
+ actionList.put(tasklist.getCreateAction(getActionId()));
+ jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+ // client version
+ jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+ // post
+ JSONObject jsResponse = postRequest(jsPost);
+ JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
+ GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
+ tasklist.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
+
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("create tasklist: handing jsonobject failed");
+ }
+ }
+
+
+ // 提交更新请求，抛出网络错误异常
+ public void commitUpdate() throws NetworkFailureException {
+ if (mUpdateArray != null) {
+ try {
+ JSONObject jsPost = new JSONObject();
+
+ // action_list
+ jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, mUpdateArray);
+
+ // client_version
+ jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+ postRequest(jsPost);
+ mUpdateArray = null;
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("commit update: handing jsonobject failed");
+ }
+ }
+ }
+
+
+ // 添加更新节点，网络错误抛出异常
+ public void addUpdateNode(Node node) throws NetworkFailureException {
+ if (node != null) {
+ // too many update items may result in an error
+ // set max to 10 items
+ if (mUpdateArray != null && mUpdateArray.length() > 10) {
+ commitUpdate();
+ }
+
+ if (mUpdateArray == null)
+ mUpdateArray = new JSONArray();
+ mUpdateArray.put(node.getUpdateAction(getActionId()));
+ }
+ }
+
+
+ // 移动task操作
+ public void moveTask(Task task, TaskList preParent, TaskList curParent)
+ throws NetworkFailureException {
+ commitUpdate();
+ try {
+ JSONObject jsPost = new JSONObject();
+ JSONArray actionList = new JSONArray();
+ JSONObject action = new JSONObject();
+
+ // action_list
+ action.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+ GTaskStringUtils.GTASK_JSON_ACTION_TYPE_MOVE);
+ action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
+ action.put(GTaskStringUtils.GTASK_JSON_ID, task.getGid());
+ if (preParent == curParent && task.getPriorSibling() != null) {
+ // put prioring_sibing_id only if moving within the tasklist and
+ // it is not the first one
+ // 只有在任务列表中移动时才放置prioring_sibing_id，而且它不是第一个
+ action.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, task.getPriorSibling());
+ }
+ action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid());
+ action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid());
+ if (preParent != curParent) {
+ // put the dest_list only if moving between tasklists
+
+ // 只有在任务列表之间移动时才放置dest_list
+ action.put(GTaskStringUtils.GTASK_JSON_DEST_LIST, curParent.getGid());
+ }
+ actionList.put(action);
+ jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+ // client_version
+
+ // 客户端版本
+ jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+ postRequest(jsPost);
+
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("move task: handing jsonobject failed");
+ }
+ }
+
+
+ // 删除节点操作，当网络错误时抛出异常
+ public void deleteNode(Node node) throws NetworkFailureException {
+ commitUpdate();
+ try {
+ JSONObject jsPost = new JSONObject();
+ JSONArray actionList = new JSONArray();
+
+ // action_list
+ node.setDeleted(true);
+ actionList.put(node.getUpdateAction(getActionId()));
+ jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+ // client_version
+
+ // 客户端版本
+ jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+ postRequest(jsPost);
+ mUpdateArray = null;
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("delete node: handing jsonobject failed");
+ }
+ }
+
+
+ // 它首先检查用户是否已登录，如果没有则抛出异常。
+ // 然后它向一个URL发送HTTP GET请求以检索一个字符串响应
+ public JSONArray getTaskLists() throws NetworkFailureException {
+ if (!mLoggedin) {
+ Log.e(TAG, "please login first");
+ throw new ActionFailureException("not logged in");
+ }
+
+ try {
+ HttpGet httpGet = new HttpGet(mGetUrl);
+ HttpResponse response = null;
+ response = mHttpClient.execute(httpGet);
+
+ // get the task list
+ String resString = getResponseContent(response.getEntity());
+ String jsBegin = "_setup(";
+ String jsEnd = ")}";
+ int begin = resString.indexOf(jsBegin);
+ int end = resString.lastIndexOf(jsEnd);
+ String jsString = null;
+ if (begin != -1 && end != -1 && begin < end) {
+ jsString = resString.substring(begin + jsBegin.length(), end);
+ }
+ JSONObject js = new JSONObject(jsString);
+ return js.getJSONObject("t").getJSONArray(GTaskStringUtils.GTASK_JSON_LISTS);
+ } catch (ClientProtocolException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new NetworkFailureException("gettasklists: httpget failed");
+ } catch (IOException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new NetworkFailureException("gettasklists: httpget failed");
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("get task lists: handing jasonobject failed");
+ }
+ }
+
+
+ // 构造一个表示POST请求的JSONObject，包括要在任务列表上执行的操作数组，并将此请求发送到服务器
+ public JSONArray getTaskList(String listGid) throws NetworkFailureException {
+ commitUpdate();
+ try {
+ JSONObject jsPost = new JSONObject();
+ JSONArray actionList = new JSONArray();
+ JSONObject action = new JSONObject();
+
+ // action_list
+ action.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+ GTaskStringUtils.GTASK_JSON_ACTION_TYPE_GETALL);
+ action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
+ action.put(GTaskStringUtils.GTASK_JSON_LIST_ID, listGid);
+ action.put(GTaskStringUtils.GTASK_JSON_GET_DELETED, false);
+ actionList.put(action);
+ jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+ // client_version
+ jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+ JSONObject jsResponse = postRequest(jsPost);
+ return jsResponse.getJSONArray(GTaskStringUtils.GTASK_JSON_TASKS);
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("get task list: handing jsonobject failed");
+ }
+ }
+
+ // 该方法返回与该类实例关联的帐户对象
+ public Account getSyncAccount() {
+ return mAccount;
+ }
+
+ // 该方法将更新数组重置为null
+ public void resetUpdateArray() {
+ mUpdateArray = null;
+ }
+}
\ No newline at end of file
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskManager.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskManager.java
new file mode 100644
index 0000000..bdbe9e0
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskManager.java
@@ -0,0 +1,869 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.remote;
+
+import android.app.Activity;
+import android.content.ContentResolver;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.util.Log;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.data.MetaData;
+import net.micode.notes.gtask.data.Node;
+import net.micode.notes.gtask.data.SqlNote;
+import net.micode.notes.gtask.data.Task;
+import net.micode.notes.gtask.data.TaskList;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.gtask.exception.NetworkFailureException;
+import net.micode.notes.tool.DataUtils;
+import net.micode.notes.tool.GTaskStringUtils;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+
+
+public class GTaskManager {
+ private static final String TAG = GTaskManager.class.getSimpleName();
+
+ public static final int STATE_SUCCESS = 0;
+
+ public static final int STATE_NETWORK_ERROR = 1;
+
+ public static final int STATE_INTERNAL_ERROR = 2;
+
+ public static final int STATE_SYNC_IN_PROGRESS = 3;
+
+ public static final int STATE_SYNC_CANCELLED = 4;
+
+ private static GTaskManager mInstance = null;
+
+ private Activity mActivity;
+
+ private Context mContext;
+
+ private ContentResolver mContentResolver;
+
+ private boolean mSyncing;
+
+ private boolean mCancelled;
+
+ private HashMap mGTaskListHashMap;
+
+ private HashMap mGTaskHashMap;
+
+ private HashMap mMetaHashMap;
+
+ private TaskList mMetaList;
+
+ private HashSet mLocalDeleteIdMap;
+
+ private HashMap mGidToNid;
+
+ private HashMap mNidToGid;
+
+
+ // 构造函数，初始化变量
+ private GTaskManager() {
+ mSyncing = false;
+ mCancelled = false;
+ mGTaskListHashMap = new HashMap();
+ mGTaskHashMap = new HashMap();
+ mMetaHashMap = new HashMap();
+ mMetaList = null;
+ mLocalDeleteIdMap = new HashSet();
+ mGidToNid = new HashMap();
+ mNidToGid = new HashMap();
+ }
+
+
+ public static synchronized GTaskManager getInstance() {
+ if (mInstance == null) {
+ mInstance = new GTaskManager();
+ }
+ return mInstance;
+ }
+
+
+ // 用于获取authtoken
+ public synchronized void setActivityContext(Activity activity) {
+ // used for getting authtoken
+ mActivity = activity;
+ }
+
+ // 调用来启动同步过程。
+ // 它以Context对象和GTaskASyncTask对象作为参数。Context对象用于获取ContentResolver对象，GTaskASyncTask对象用于报告同步进程的进度。
+ public int sync(Context context, GTaskASyncTask asyncTask) {
+ if (mSyncing) {
+ Log.d(TAG, "Sync is in progress");
+ return STATE_SYNC_IN_PROGRESS;
+ }
+ mContext = context;
+ mContentResolver = mContext.getContentResolver();
+ mSyncing = true;
+ mCancelled = false;
+ mGTaskListHashMap.clear();
+ mGTaskHashMap.clear();
+ mMetaHashMap.clear();
+ mLocalDeleteIdMap.clear();
+ mGidToNid.clear();
+ mNidToGid.clear();
+
+ try {
+ GTaskClient client = GTaskClient.getInstance();
+ client.resetUpdateArray();
+
+ // login google task
+ if (!mCancelled) {
+ if (!client.login(mActivity)) {
+ throw new NetworkFailureException("login google task failed");
+ }
+ }
+
+ // get the task list from google
+ // 获取task信息从google中
+ asyncTask.publishProgess(mContext.getString(R.string.sync_progress_init_list));
+ initGTaskList();
+
+ // do content sync work
+ // 进行同步操作
+ asyncTask.publishProgess(mContext.getString(R.string.sync_progress_syncing));
+ syncContent();
+ } catch (NetworkFailureException e) {
+ Log.e(TAG, e.toString());
+ return STATE_NETWORK_ERROR;
+ } catch (ActionFailureException e) {
+ Log.e(TAG, e.toString());
+ return STATE_INTERNAL_ERROR;
+ } catch (Exception e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ return STATE_INTERNAL_ERROR;
+ } finally {
+ mGTaskListHashMap.clear();
+ mGTaskHashMap.clear();
+ mMetaHashMap.clear();
+ mLocalDeleteIdMap.clear();
+ mGidToNid.clear();
+ mNidToGid.clear();
+ mSyncing = false;
+ }
+
+ return mCancelled ? STATE_SYNC_CANCELLED : STATE_SUCCESS;
+ }
+
+
+ /*
+ initGTaskList()方法负责获取远程任务列表及其关联任务。它首先使用GTaskClient对象的getTaskLists()方法获得所有任务列表的列表。
+ 然后，它查找具有与特定模式匹配的名称的任务列表，如果找到，则加载与其关联的元数据任务。
+ 如果没有找到任务列表，则创建一个新的任务列表。然后加载所有其他任务列表及其关联的任务。
+ */
+ private void initGTaskList() throws NetworkFailureException {
+ if (mCancelled)
+ return;
+ GTaskClient client = GTaskClient.getInstance();
+ try {
+ JSONArray jsTaskLists = client.getTaskLists();
+
+ // init meta list first
+ mMetaList = null;
+ for (int i = 0; i < jsTaskLists.length(); i++) {
+ JSONObject object = jsTaskLists.getJSONObject(i);
+ String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
+ String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
+
+ if (name
+ .equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) {
+ mMetaList = new TaskList();
+ mMetaList.setContentByRemoteJSON(object);
+
+ // load meta data
+ JSONArray jsMetas = client.getTaskList(gid);
+ for (int j = 0; j < jsMetas.length(); j++) {
+ object = (JSONObject) jsMetas.getJSONObject(j);
+ MetaData metaData = new MetaData();
+ metaData.setContentByRemoteJSON(object);
+ if (metaData.isWorthSaving()) {
+ mMetaList.addChildTask(metaData);
+ if (metaData.getGid() != null) {
+ mMetaHashMap.put(metaData.getRelatedGid(), metaData);
+ }
+ }
+ }
+ }
+ }
+
+ // create meta list if not existed
+ if (mMetaList == null) {
+ mMetaList = new TaskList();
+ mMetaList.setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+ + GTaskStringUtils.FOLDER_META);
+ GTaskClient.getInstance().createTaskList(mMetaList);
+ }
+
+ // init task list
+ for (int i = 0; i < jsTaskLists.length(); i++) {
+ JSONObject object = jsTaskLists.getJSONObject(i);
+ String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
+ String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
+
+ if (name.startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX)
+ && !name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+ + GTaskStringUtils.FOLDER_META)) {
+ TaskList tasklist = new TaskList();
+ tasklist.setContentByRemoteJSON(object);
+ mGTaskListHashMap.put(gid, tasklist);
+ mGTaskHashMap.put(gid, tasklist);
+
+ // load tasks
+ JSONArray jsTasks = client.getTaskList(gid);
+ for (int j = 0; j < jsTasks.length(); j++) {
+ object = (JSONObject) jsTasks.getJSONObject(j);
+ gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
+ Task task = new Task();
+ task.setContentByRemoteJSON(object);
+ if (task.isWorthSaving()) {
+ task.setMetaInfo(mMetaHashMap.get(gid));
+ tasklist.addChildTask(task);
+ mGTaskHashMap.put(gid, task);
+ }
+ }
+ }
+ }
+ } catch (JSONException e) {
+ Log.e(TAG, e.toString());
+ e.printStackTrace();
+ throw new ActionFailureException("initGTaskList: handing JSONObject failed");
+ }
+ }
+
+ /*
+ 初始化变量并清除本地已删除注释的映射。
+ 如果同步已取消，请提前返回。
+ 查询本地数据库中已在本地删除的笔记
+ 对于每个笔记，如果它存在，请将其从远程笔记映射中删除，并执行内容同步操作远程删除它
+ 。将本地备注ID添加到本地删除备注映射中。
+ */
+
+ private void syncContent() throws NetworkFailureException {
+ int syncType;
+ Cursor c = null;
+ String gid;
+ Node node;
+
+ mLocalDeleteIdMap.clear();
+
+ if (mCancelled) {
+ return;
+ }
+
+ // for local deleted note
+ try {
+ c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
+ "(type<>? AND parent_id=?)", new String[] {
+ String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)
+ }, null);
+ if (c != null) {
+ while (c.moveToNext()) {
+ gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+ node = mGTaskHashMap.get(gid);
+ if (node != null) {
+ mGTaskHashMap.remove(gid);
+ doContentSync(Node.SYNC_ACTION_DEL_REMOTE, node, c);
+ }
+
+ mLocalDeleteIdMap.add(c.getLong(SqlNote.ID_COLUMN));
+ }
+ } else {
+ Log.w(TAG, "failed to query trash folder");
+ }
+ } finally {
+ if (c != null) {
+ c.close();
+ c = null;
+ }
+ }
+
+ // sync folder first
+ syncFolder();
+
+ // for note existing in database
+ try {
+ c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
+ "(type=? AND parent_id<>?)", new String[] {
+ String.valueOf(Notes.TYPE_NOTE), String.valueOf(Notes.ID_TRASH_FOLER)
+ }, NoteColumns.TYPE + " DESC");
+ if (c != null) {
+ while (c.moveToNext()) {
+ gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+ node = mGTaskHashMap.get(gid);
+ if (node != null) {
+ mGTaskHashMap.remove(gid);
+ mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN));
+ mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);
+ syncType = node.getSyncAction(c);
+ } else {
+ if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) {
+ // local add
+ syncType = Node.SYNC_ACTION_ADD_REMOTE;
+ } else {
+ // remote delete
+ syncType = Node.SYNC_ACTION_DEL_LOCAL;
+ }
+ }
+ doContentSync(syncType, node, c);
+ }
+ } else {
+ Log.w(TAG, "failed to query existing note in database");
+ }
+
+ } finally {
+ if (c != null) {
+ c.close();
+ c = null;
+ }
+ }
+
+ // go through remaining items
+ Iterator> iter = mGTaskHashMap.entrySet().iterator();
+ while (iter.hasNext()) {
+ Map.Entry entry = iter.next();
+ node = entry.getValue();
+ doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null);
+ }
+
+ // mCancelled can be set by another thread, so we neet to check one by
+ // one
+ // clear local delete table
+ if (!mCancelled) {
+ if (!DataUtils.batchDeleteNotes(mContentResolver, mLocalDeleteIdMap)) {
+ throw new ActionFailureException("failed to batch-delete local deleted notes");
+ }
+ }
+
+ // refresh local sync id
+ if (!mCancelled) {
+ GTaskClient.getInstance().commitUpdate();
+ refreshLocalSyncId();
+ }
+
+ }
+
+ /*
+ 查询本地数据库中未删除的笔记(不包括系统笔记和垃圾文件夹中的笔记)。
+ 对于每个笔记，确定它是否远程存在，如果存在，将其从远程笔记映射中移除，将其ID添加到远程ID与本地ID的映射中，并根据远程节点返回的同步操作执行内容同步操作。
+ 如果远程不存在，则确定它是在本地添加的(在这种情况下，执行内容同步操作远程添加它)还是远程删除的(在这种情况下，将其标记为本地删除)。
+ 对于映射中剩余的每个远程注释，执行内容同步操作将其添加到本地。
+ 如果没有取消同步，请从本地数据库中删除本地删除的备注。如果此操作失败，则抛出异常。
+ 如果同步尚未取消，请将更新提交给远程服务并刷新本地同步ID。
+ */
+
+ private void syncFolder() throws NetworkFailureException {
+ Cursor c = null;
+ String gid;
+ Node node;
+ int syncType;
+
+ if (mCancelled) {
+ return;
+ }
+
+ // for root folder
+ try {
+ c = mContentResolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,
+ Notes.ID_ROOT_FOLDER), SqlNote.PROJECTION_NOTE, null, null, null);
+ if (c != null) {
+ c.moveToNext();
+ gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+ node = mGTaskHashMap.get(gid);
+ if (node != null) {
+ mGTaskHashMap.remove(gid);
+ mGidToNid.put(gid, (long) Notes.ID_ROOT_FOLDER);
+ mNidToGid.put((long) Notes.ID_ROOT_FOLDER, gid);
+ // for system folder, only update remote name if necessary
+ if (!node.getName().equals(
+ GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT))
+ doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c);
+ } else {
+ doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c);
+ }
+ } else {
+ Log.w(TAG, "failed to query root folder");
+ }
+ } finally {
+ if (c != null) {
+ c.close();
+ c = null;
+ }
+ }
+
+ // for call-note folder
+ try {
+ c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE, "(_id=?)",
+ new String[] {
+ String.valueOf(Notes.ID_CALL_RECORD_FOLDER)
+ }, null);
+ if (c != null) {
+ if (c.moveToNext()) {
+ gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+ node = mGTaskHashMap.get(gid);
+ if (node != null) {
+ mGTaskHashMap.remove(gid);
+ mGidToNid.put(gid, (long) Notes.ID_CALL_RECORD_FOLDER);
+ mNidToGid.put((long) Notes.ID_CALL_RECORD_FOLDER, gid);
+ // for system folder, only update remote name if
+ // necessary
+ if (!node.getName().equals(
+ GTaskStringUtils.MIUI_FOLDER_PREFFIX
+ + GTaskStringUtils.FOLDER_CALL_NOTE))
+ doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c);
+ } else {
+ doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c);
+ }
+ }
+ } else {
+ Log.w(TAG, "failed to query call note folder");
+ }
+ } finally {
+ if (c != null) {
+ c.close();
+ c = null;
+ }
+ }
+
+ // for local existing folders
+ try {
+ c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
+ "(type=? AND parent_id<>?)", new String[] {
+ String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)
+ }, NoteColumns.TYPE + " DESC");
+ if (c != null) {
+ while (c.moveToNext()) {
+ gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+ node = mGTaskHashMap.get(gid);
+ if (node != null) {
+ mGTaskHashMap.remove(gid);
+ mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN));
+ mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);
+ syncType = node.getSyncAction(c);
+ } else {
+ if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) {
+ // local add
+ syncType = Node.SYNC_ACTION_ADD_REMOTE;
+ } else {
+ // remote delete
+ syncType = Node.SYNC_ACTION_DEL_LOCAL;
+ }
+ }
+ doContentSync(syncType, node, c);
+ }
+ } else {
+ Log.w(TAG, "failed to query existing folder");
+ }
+ } finally {
+ if (c != null) {
+ c.close();
+ c = null;
+ }
+ }
+
+ // for remote add folders
+ Iterator> iter = mGTaskListHashMap.entrySet().iterator();
+ while (iter.hasNext()) {
+ Map.Entry entry = iter.next();
+ gid = entry.getKey();
+ node = entry.getValue();
+ if (mGTaskHashMap.containsKey(gid)) {
+ mGTaskHashMap.remove(gid);
+ doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null);
+ }
+ }
+
+ if (!mCancelled)
+ GTaskClient.getInstance().commitUpdate();
+ }
+
+ /*
+ 首先检查同步进程是否已取消，如果已取消，则不执行任何操作返回。
+ 然后，它根据syncType参数执行一个switch语句，该参数决定要采取的同步操作的类型。
+ */
+ private void doContentSync(int syncType, Node node, Cursor c) throws NetworkFailureException {
+ if (mCancelled) {
+ return;
+ }
+
+ MetaData meta;
+ switch (syncType) {
+ case Node.SYNC_ACTION_ADD_LOCAL:
+ addLocalNode(node);
+ break;
+ case Node.SYNC_ACTION_ADD_REMOTE:
+ addRemoteNode(node, c);
+ break;
+ case Node.SYNC_ACTION_DEL_LOCAL:
+ meta = mMetaHashMap.get(c.getString(SqlNote.GTASK_ID_COLUMN));
+ if (meta != null) {
+ GTaskClient.getInstance().deleteNode(meta);
+ }
+ mLocalDeleteIdMap.add(c.getLong(SqlNote.ID_COLUMN));
+ break;
+ case Node.SYNC_ACTION_DEL_REMOTE:
+ meta = mMetaHashMap.get(node.getGid());
+ if (meta != null) {
+ GTaskClient.getInstance().deleteNode(meta);
+ }
+ GTaskClient.getInstance().deleteNode(node);
+ break;
+ case Node.SYNC_ACTION_UPDATE_LOCAL:
+ updateLocalNode(node, c);
+ break;
+ case Node.SYNC_ACTION_UPDATE_REMOTE:
+ updateRemoteNode(node, c);
+ break;
+ case Node.SYNC_ACTION_UPDATE_CONFLICT:
+ // merging both modifications maybe a good idea
+ // right now just use local update simply
+ updateRemoteNode(node, c);
+ break;
+ case Node.SYNC_ACTION_NONE:
+ break;
+ case Node.SYNC_ACTION_ERROR:
+ default:
+ throw new ActionFailureException("unkown sync action type");
+ }
+ }
+
+ /*
+ 查布尔变量mCancelled是否为真。如果为真，该方法立即返回，不做任何其他操作。如果mCancelled为false，该方法将根据作为参数传递的Node类型创建一个新的SqlNote对象。
+
+ 如果Node是TaskList的实例，该方法检查节点的名称。如果名称与特定模式匹配，该方法将创建一个具有特定id的新SqlNote对象。
+ 否则，该方法将创建一个新的SqlNote对象，其中内容字段设置为节点内容的本地JSON表示，parentId字段设置为Notes.ID_ROOT_FOLDER。
+ */
+
+ private void addLocalNode(Node node) throws NetworkFailureException {
+ if (mCancelled) {
+ return;
+ }
+
+ SqlNote sqlNote;
+ if (node instanceof TaskList) {
+ if (node.getName().equals(
+ GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT)) {
+ sqlNote = new SqlNote(mContext, Notes.ID_ROOT_FOLDER);
+ } else if (node.getName().equals(
+ GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_CALL_NOTE)) {
+ sqlNote = new SqlNote(mContext, Notes.ID_CALL_RECORD_FOLDER);
+ } else {
+ sqlNote = new SqlNote(mContext);
+ sqlNote.setContent(node.getLocalJSONFromContent());
+ sqlNote.setParentId(Notes.ID_ROOT_FOLDER);
+ }
+ } else {
+ sqlNote = new SqlNote(mContext);
+ JSONObject js = node.getLocalJSONFromContent();
+ try {
+ if (js.has(GTaskStringUtils.META_HEAD_NOTE)) {
+ JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+ if (note.has(NoteColumns.ID)) {
+ long id = note.getLong(NoteColumns.ID);
+ if (DataUtils.existInNoteDatabase(mContentResolver, id)) {
+ // the id is not available, have to create a new one
+ note.remove(NoteColumns.ID);
+ }
+ }
+ }
+
+ if (js.has(GTaskStringUtils.META_HEAD_DATA)) {
+ JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+ for (int i = 0; i < dataArray.length(); i++) {
+ JSONObject data = dataArray.getJSONObject(i);
+ if (data.has(DataColumns.ID)) {
+ long dataId = data.getLong(DataColumns.ID);
+ if (DataUtils.existInDataDatabase(mContentResolver, dataId)) {
+ // the data id is not available, have to create
+ // a new one
+ data.remove(DataColumns.ID);
+ }
+ }
+ }
+
+ }
+ } catch (JSONException e) {
+ Log.w(TAG, e.toString());
+ e.printStackTrace();
+ }
+ sqlNote.setContent(js);
+
+ Long parentId = mGidToNid.get(((Task) node).getParent().getGid());
+ if (parentId == null) {
+ Log.e(TAG, "cannot find task's parent id locally");
+ throw new ActionFailureException("cannot add local node");
+ }
+ sqlNote.setParentId(parentId.longValue());
+ }
+
+ // create the local node
+ sqlNote.setGtaskId(node.getGid());
+ sqlNote.commit(false);
+
+ // update gid-nid mapping
+ mGidToNid.put(node.getGid(), sqlNote.getId());
+ mNidToGid.put(sqlNote.getId(), node.getGid());
+
+ // update meta
+ updateRemoteMeta(node.getGid(), sqlNote);
+ }
+
+ // 基本用途同addLocalNode一样，只是并不是添加而是更新
+ private void updateLocalNode(Node node, Cursor c) throws NetworkFailureException {
+ if (mCancelled) {
+ return;
+ }
+
+ SqlNote sqlNote;
+ // update the note locally
+ sqlNote = new SqlNote(mContext, c);
+ sqlNote.setContent(node.getLocalJSONFromContent());
+
+ Long parentId = (node instanceof Task) ? mGidToNid.get(((Task) node).getParent().getGid())
+ : new Long(Notes.ID_ROOT_FOLDER);
+ if (parentId == null) {
+ Log.e(TAG, "cannot find task's parent id locally");
+ throw new ActionFailureException("cannot update local node");
+ }
+ sqlNote.setParentId(parentId.longValue());
+ sqlNote.commit(true);
+
+ // update meta info
+ updateRemoteMeta(node.getGid(), sqlNote);
+ }
+
+ /*
+ 基于"Cursor"对象中的信息，使用谷歌Tasks API远程创建一个新的任务或任务列表。
+ 如果注释是一个任务，它将创建一个具有指定内容的新任务，并将其添加到适当的任务列表中。如果注释是一个任务列表，它将创建一个具有指定名称的新任务列表。
+
+ 一旦远程创建了新的任务或任务列表，与该笔记相关联的“SqlNote”对象将被更新为新的“GTask”ID，并且本地修改标志将被清除。
+ */
+ private void addRemoteNode(Node node, Cursor c) throws NetworkFailureException {
+ if (mCancelled) {
+ return;
+ }
+
+ SqlNote sqlNote = new SqlNote(mContext, c);
+ Node n;
+
+ // update remotely
+ if (sqlNote.isNoteType()) {
+ Task task = new Task();
+ task.setContentByLocalJSON(sqlNote.getContent());
+
+ String parentGid = mNidToGid.get(sqlNote.getParentId());
+ if (parentGid == null) {
+ Log.e(TAG, "cannot find task's parent tasklist");
+ throw new ActionFailureException("cannot add remote task");
+ }
+ mGTaskListHashMap.get(parentGid).addChildTask(task);
+
+ GTaskClient.getInstance().createTask(task);
+ n = (Node) task;
+
+ // add meta
+ updateRemoteMeta(task.getGid(), sqlNote);
+ } else {
+ TaskList tasklist = null;
+
+ // we need to skip folder if it has already existed
+ String folderName = GTaskStringUtils.MIUI_FOLDER_PREFFIX;
+ if (sqlNote.getId() == Notes.ID_ROOT_FOLDER)
+ folderName += GTaskStringUtils.FOLDER_DEFAULT;
+ else if (sqlNote.getId() == Notes.ID_CALL_RECORD_FOLDER)
+ folderName += GTaskStringUtils.FOLDER_CALL_NOTE;
+ else
+ folderName += sqlNote.getSnippet();
+
+ Iterator> iter = mGTaskListHashMap.entrySet().iterator();
+ while (iter.hasNext()) {
+ Map.Entry entry = iter.next();
+ String gid = entry.getKey();
+ TaskList list = entry.getValue();
+
+ if (list.getName().equals(folderName)) {
+ tasklist = list;
+ if (mGTaskHashMap.containsKey(gid)) {
+ mGTaskHashMap.remove(gid);
+ }
+ break;
+ }
+ }
+
+ // no match we can add now
+ if (tasklist == null) {
+ tasklist = new TaskList();
+ tasklist.setContentByLocalJSON(sqlNote.getContent());
+ GTaskClient.getInstance().createTaskList(tasklist);
+ mGTaskListHashMap.put(tasklist.getGid(), tasklist);
+ }
+ n = (Node) tasklist;
+ }
+
+ // update local note
+ sqlNote.setGtaskId(n.getGid());
+ sqlNote.commit(false);
+ sqlNote.resetLocalModified();
+ sqlNote.commit(true);
+
+ // gid-id mapping
+ mGidToNid.put(n.getGid(), sqlNote.getId());
+ mNidToGid.put(sqlNote.getId(), n.getGid());
+ }
+
+
+ /*
+ 根据"Cursor"对象中的信息，使用谷歌Tasks API远程更新现有任务或任务列表。它更新指定的“Node”对象的内容，并用新内容更新关联的“SqlNote”对象。
+ 如果注释是一个任务，它还会检查该任务是否已移动到不同的任务列表，并在必要时远程移动该任务。最后，从“SqlNote”对象中清除本地修改标志。
+ */
+ private void updateRemoteNode(Node node, Cursor c) throws NetworkFailureException {
+ if (mCancelled) {
+ return;
+ }
+
+ SqlNote sqlNote = new SqlNote(mContext, c);
+
+ // update remotely
+ node.setContentByLocalJSON(sqlNote.getContent());
+ GTaskClient.getInstance().addUpdateNode(node);
+
+ // update meta
+ updateRemoteMeta(node.getGid(), sqlNote);
+
+ // move task if necessary
+ if (sqlNote.isNoteType()) {
+ Task task = (Task) node;
+ TaskList preParentList = task.getParent();
+
+ String curParentGid = mNidToGid.get(sqlNote.getParentId());
+ if (curParentGid == null) {
+ Log.e(TAG, "cannot find task's parent tasklist");
+ throw new ActionFailureException("cannot update remote task");
+ }
+ TaskList curParentList = mGTaskListHashMap.get(curParentGid);
+
+ if (preParentList != curParentList) {
+ preParentList.removeChildTask(task);
+ curParentList.addChildTask(task);
+ GTaskClient.getInstance().moveTask(task, preParentList, curParentList);
+ }
+ }
+
+ // clear local modified flag
+ sqlNote.resetLocalModified();
+ sqlNote.commit(true);
+ }
+
+ /*
+ 首先检查SqlNote对象是否为空，并表示一个注释类型。
+ 然后它从一个名为mMetaHashMap的HashMap中检索与gid关联的MetaData对象。
+ 如果MetaData对象存在，它会用SqlNote对象的内容更新注释的元数据，并使用外部GTaskClient对象将MetaData对象添加到更新队列中。
+ 如果MetaData对象不存在，它会创建一个新的MetaData对象，用SqlNote对象的内容设置它的元数据，将它添加到任务列表中，将MetaData对象放在mMetaHashMap中，并使用GTaskClient为它创建一个新任务。
+ 注意，如果在更新期间发生任何网络错误，该方法将抛出一个NetworkFailureException。
+ */
+ private void updateRemoteMeta(String gid, SqlNote sqlNote) throws NetworkFailureException {
+ if (sqlNote != null && sqlNote.isNoteType()) {
+ MetaData metaData = mMetaHashMap.get(gid);
+ if (metaData != null) {
+ metaData.setMeta(gid, sqlNote.getContent());
+ GTaskClient.getInstance().addUpdateNode(metaData);
+ } else {
+ metaData = new MetaData();
+ metaData.setMeta(gid, sqlNote.getContent());
+ mMetaList.addChildTask(metaData);
+ mMetaHashMap.put(gid, metaData);
+ GTaskClient.getInstance().createTask(metaData);
+ }
+ }
+ }
+
+ /*
+ 检查mCancelled标志是否设置为true。如果是，该方法只返回，不做任何其他事情。
+ 然后，它会清除一些内部HashMap对象(mGTaskHashMap, mgtasklistthashmap和mMetaHashMap)，并使用initGTaskList()方法初始化GTaskList对象。
+ */
+ private void refreshLocalSyncId() throws NetworkFailureException {
+ if (mCancelled) {
+ return;
+ }
+
+ // get the latest gtask list
+ mGTaskHashMap.clear();
+ mGTaskListHashMap.clear();
+ mMetaHashMap.clear();
+ initGTaskList();
+
+ Cursor c = null;
+ try {
+ c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
+ "(type<>? AND parent_id<>?)", new String[] {
+ String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)
+ }, NoteColumns.TYPE + " DESC");
+ if (c != null) {
+ while (c.moveToNext()) {
+ String gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+ Node node = mGTaskHashMap.get(gid);
+ if (node != null) {
+ mGTaskHashMap.remove(gid);
+ ContentValues values = new ContentValues();
+ values.put(NoteColumns.SYNC_ID, node.getLastModified());
+ mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,
+ c.getLong(SqlNote.ID_COLUMN)), values, null, null);
+ } else {
+ Log.e(TAG, "something is missed");
+ throw new ActionFailureException(
+ "some local items don't have gid after sync");
+ }
+ }
+ } else {
+ Log.w(TAG, "failed to query local note to refresh sync id");
+ }
+ } finally {
+ if (c != null) {
+ c.close();
+ c = null;
+ }
+ }
+ }
+
+ // 该方法检索GTaskClient对象使用的同步帐户的名称。
+ public String getSyncAccount() {
+ return GTaskClient.getInstance().getSyncAccount().name;
+ }
+
+
+ // 该方法将mCancelled标志设置为true，该标志可用于取消同步进程。
+ public void cancelSync() {
+ mCancelled = true;
+ }
+}
diff --git a/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskSyncService.java b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskSyncService.java
new file mode 100644
index 0000000..653c82c
--- /dev/null
+++ b/src/精读代码/组长：薛皓天/精读 data gtask/gtask/remote/GTaskSyncService.java
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.remote;
+
+import android.app.Activity;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.IBinder;
+
+public class GTaskSyncService extends Service {
+ public final static String ACTION_STRING_NAME = "sync_action_type";
+
+ public final static int ACTION_START_SYNC = 0;
+
+ public final static int ACTION_CANCEL_SYNC = 1;
+
+ public final static int ACTION_INVALID = 2;
+
+ public final static String GTASK_SERVICE_BROADCAST_NAME = "net.micode.notes.gtask.remote.gtask_sync_service";
+
+ public final static String GTASK_SERVICE_BROADCAST_IS_SYNCING = "isSyncing";
+
+ public final static String GTASK_SERVICE_BROADCAST_PROGRESS_MSG = "progressMsg";
+
+ private static GTaskASyncTask mSyncTask = null;
+
+ private static String mSyncProgress = "";
+
+
+ // 使用 GTaskASyncTask 实例启动同步任务，它是一个单独的类，用于在后台执行同步
+ private void startSync() {
+ if (mSyncTask == null) {
+ mSyncTask = new GTaskASyncTask(this, new GTaskASyncTask.OnCompleteListener() {
+ public void onComplete() {
+ mSyncTask = null;
+ sendBroadcast("");
+ stopSelf();
+ }
+ });
+ sendBroadcast("");
+ mSyncTask.execute();
+ }
+ }
+
+
+ // 取消同步任务，如果它当前正在运行
+ private void cancelSync() {
+ if (mSyncTask != null) {
+ mSyncTask.cancelSync();
+ }
+ }
+
+
+ // mSyncTask 字段初始化为 null
+ @Override
+ public void onCreate() {
+ mSyncTask = null;
+ }
+
+ // 通过检查 ACTION_STRING_NAME 额外字段并执行适当的操作来处理传入的广播意图
+ @Override
+ public int onStartCommand(Intent intent, int flags, int startId) {
+ Bundle bundle = intent.getExtras();
+ if (bundle != null && bundle.containsKey(ACTION_STRING_NAME)) {
+ switch (bundle.getInt(ACTION_STRING_NAME, ACTION_INVALID)) {
+ case ACTION_START_SYNC:
+ startSync();
+ break;
+ case ACTION_CANCEL_SYNC:
+ cancelSync();
+ break;
+ default:
+ break;
+ }
+ return START_STICKY;
+ }
+ return super.onStartCommand(intent, flags, startId);
+ }
+
+
+ // 在系统内存不足时取消同步任务
+ @Override
+ public void onLowMemory() {
+ if (mSyncTask != null) {
+ mSyncTask.cancelSync();
+ }
+ }
+
+
+ public IBinder onBind(Intent intent) {
+ return null;
+ }
+
+
+ // 发送具有当前同步进度和状态的广播意图
+ public void sendBroadcast(String msg) {
+ mSyncProgress = msg;
+ Intent intent = new Intent(GTASK_SERVICE_BROADCAST_NAME);
+ intent.putExtra(GTASK_SERVICE_BROADCAST_IS_SYNCING, mSyncTask != null);
+ intent.putExtra(GTASK_SERVICE_BROADCAST_PROGRESS_MSG, msg);
+ sendBroadcast(intent);
+ }
+
+ // 开始同步
+ public static void startSync(Activity activity) {
+ GTaskManager.getInstance().setActivityContext(activity);
+ Intent intent = new Intent(activity, GTaskSyncService.class);
+ intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_START_SYNC);
+ activity.startService(intent);
+ }
+
+ // 取消同步
+ public static void cancelSync(Context context) {
+ Intent intent = new Intent(context, GTaskSyncService.class);
+ intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_CANCEL_SYNC);
+ context.startService(intent);
+ }
+
+ // 正在同步
+ public static boolean isSyncing() {
+ return mSyncTask != null;
+ }
+
+
+ // 获取进度
+ public static String getProgressString() {
+ return mSyncProgress;
+ }
+}