diff --git a/src/石云帆 230340179.txt b/src/石云帆 230340179.txt new file mode 100644 index 0000000..37e5757 --- /dev/null +++ b/src/石云帆 230340179.txt @@ -0,0 +1,1390 @@ +package net.micode.notes.gtask.data; + +/** + * 元数据类，继承自Task，用于存储与任务相关的元信息 + */ +public class MetaData extends Task { + // 日志标签，使用类简名 + private final static String TAG = MetaData.class.getSimpleName(); + + // 关联的GTask ID + private String mRelatedGid = null; + + /** + * 设置元数据信息 + * @param gid 关联的GTask ID + * @param metaInfo 需要存储的元信息JSON对象 + */ + public void setMeta(String gid, JSONObject metaInfo) { + try { + // 将GID存入元信息中 + metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid); + } catch (JSONException e) { + Log.e(TAG, "无法存入关联GID"); + } + // 将JSON字符串存入笔记内容 + setNotes(metaInfo.toString()); + // 设置固定名称标识元数据 + setName(GTaskStringUtils.META_NOTE_NAME); + } + + /** + * 获取关联的GID + */ + public String getRelatedGid() { + return mRelatedGid; + } + + /** + * 判断是否需要保存（当笔记内容不为空时需要保存） + */ + @Override + public boolean isWorthSaving() { + return getNotes() != null; + } + + /** + * 从远程JSON数据更新元数据内容 + */ + @Override + public void setContentByRemoteJSON(JSONObject js) { + super.setContentByRemoteJSON(js); + if (getNotes() != null) { + try { + // 解析笔记中的JSON获取关联GID + JSONObject metaInfo = new JSONObject(getNotes().trim()); + mRelatedGid = metaInfo.getString(GTaskStringUtils.META_HEAD_GTASK_ID); + } catch (JSONException e) { + Log.w(TAG, "获取关联GID失败"); + mRelatedGid = null; + } + } + } + + // 以下方法禁止本地操作，直接抛出异常 + @Override + public void setContentByLocalJSON(JSONObject js) { + throw new IllegalAccessError("元数据不应通过本地JSON设置"); + } + + @Override + public JSONObject getLocalJSONFromContent() { + throw new IllegalAccessError("元数据不应生成本地JSON"); + } + + @Override + public int getSyncAction(Cursor c) { + throw new IllegalAccessError("元数据不应获取同步动作"); + } +} +package net.micode.notes.gtask.data; + +/** + * 抽象节点类，定义同步任务的基本结构和操作 + */ +public abstract class Node { + // 同步动作常量定义 + public static final int SYNC_ACTION_NONE = 0; // 无需同步 + public static final int SYNC_ACTION_ADD_REMOTE = 1; // 需添加到远程 + public static final int SYNC_ACTION_ADD_LOCAL = 2; // 需添加到本地 + // ...其他同步动作常量 + + // 节点基础属性 + private String mGid; // 全局唯一标识 + private String mName; // 节点名称 + private long mLastModified; // 最后修改时间戳 + private boolean mDeleted; // 删除标记 + + public Node() { + mGid = null; + mName = ""; + mLastModified = 0; + mDeleted = false; + } + + /** + * 抽象方法：创建动作的JSON表示 + */ + public abstract JSONObject getCreateAction(int actionId); + + /** + * 抽象方法：更新动作的JSON表示 + */ + public abstract JSONObject getUpdateAction(int actionId); + + // 属性访问方法 + public void setGid(String gid) { this.mGid = gid; } + public String getGid() { return this.mGid; } + // ...其他属性getter/setter +} +package net.micode.notes.gtask.data; + +/** + * 数据库操作类，处理与SQLite的交互 + */ +public class SqlData { + private static final String TAG = SqlData.class.getSimpleName(); + private static final int INVALID_ID = -99999; // 无效ID标识 + + // 数据库列定义 + public static final String[] PROJECTION_DATA = { + DataColumns.ID, + DataColumns.MIME_TYPE, + DataColumns.CONTENT, + DataColumns.DATA1, + DataColumns.DATA3 + }; + + // 数据库字段索引 + public static final int DATA_ID_COLUMN = 0; + // ...其他字段索引 + + // 数据字段 + private ContentResolver mContentResolver; // 内容解析器 + private boolean mIsCreate; // 新建标记 + private long mDataId; // 数据ID + // ...其他字段 + + /** + * 构造方法（新建模式） + */ + public SqlData(Context context) { + mContentResolver = context.getContentResolver(); + mIsCreate = true; + mDataId = INVALID_ID; + // 初始化默认值... + } + + /** + * 从游标加载数据 + */ + private void loadFromCursor(Cursor c) { + mDataId = c.getLong(DATA_ID_COLUMN); + // 从游标读取各字段值... + } + + /** + * 提交数据到数据库 + */ + public void commit(long noteId, boolean validateVersion, long version) { + if (mIsCreate) { + // 新建数据插入逻辑... + Uri uri = mContentResolver.insert(Notes.CONTENT_DATA_URI, mDiffDataValues); + } else { + // 现有数据更新逻辑... + int result = mContentResolver.update(...); + } + // 清除修改记录 + mDiffDataValues.clear(); + mIsCreate = false; + } +} +package net.micode.notes.gtask.exception; + +/** + * 操作失败异常类 + */ +public class ActionFailureException extends RuntimeException { + private static final long serialVersionUID = 4425249765923293627L; + + public ActionFailureException(String message) { + super(message); + } + + // 其他构造方法... +} + +/** + * 网络异常类 + */ +public class NetworkFailureException extends Exception { + private static final long serialVersionUID = 2107610287180234136L; + + public NetworkFailureException(String message) { + super(message); + } + + // 其他构造方法... +} +package net.micode.notes.gtask.remote; + +/** + * 异步任务处理类，管理后台同步操作 + */ +public class GTaskASyncTask extends AsyncTask { + // 通知ID常量 + private static int GTASK_SYNC_NOTIFICATION_ID = 5234235; + + /** + * 显示同步状态通知 + */ + private void showNotification(int tickerId, String content) { + Notification notification = new Notification(...); + // 设置通知图标、提示信息等... + mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification); + } + + /** + * 后台执行同步操作 + */ + @Override + protected Integer doInBackground(Void... unused) { + publishProgress("开始登录..."); + return mTaskManager.sync(mContext, this); + } + + /** + * 同步结果处理 + */ + @Override + protected void onPostExecute(Integer result) { + switch (result) { + case GTaskManager.STATE_SUCCESS: + showNotification(R.string.ticker_success, "同步成功"); + break; + case GTaskManager.STATE_NETWORK_ERROR: + showNotification(R.string.ticker_fail, "网络错误"); + break; + // 其他状态处理... + } + } +} + +/** + * GTask客户端管理类 + */ +public class GTaskClient { + /** + * 登录Google账户 + */ + private String loginGoogleAccount(Activity activity, boolean invalidateToken) { + AccountManager accountManager = AccountManager.get(activity); + // 获取账户列表并验证... + return authToken; + } + + /** + * 创建新任务 + */ + public void createTask(Task task) throws NetworkFailureException { + JSONObject jsPost = new JSONObject(); + // 构建任务创建JSON... + JSONObject jsResponse = postRequest(jsPost); + // 处理响应结果... + } + + /** + * 提交批量更新 + */ + public void commitUpdate() throws NetworkFailureException { + if (mUpdateArray != null) { + JSONObject jsPost = new JSONObject(); + // 构建批量更新JSON... + postRequest(jsPost); + mUpdateArray = null; + } + } +} +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())); +//这里会获取到删除操作的ID，加入到actionLiast中 + jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList); + + // 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("delete node: handing jsonobject failed"); + } + } + + /* + * 获取任务列表 + * 首先通过GetURI使用getResponseContent从网上获取数据 + * 然后筛选出"_setup("到)}的部分，并且从中获取GTASK_JSON_LISTS的内容返回 + */ + 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 + //筛选工作，把筛选出的字符串放入jsString + 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); + //获取GTASK_JSON_LISTS + 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"); + } + } + + /* + * 通过传入的TASKList的gid,从网络上获取相应属于这个任务列表的任务 + */ + 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); +//这里设置为传入的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"); + } + } + + public Account getSyncAccount() { + return mAccount; + } + + //重置更新的内容 + public void resetUpdateArray() { + mUpdateArray = null; + } +} +4、GTaskManager.java +package net.micode.notes.gtask.remote; + +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; + +private GTaskManager() { + //对象初始化函数 + mSyncing = false; + //正在同步,flase代表未执行 + mCancelled = false; + //全局标识，flase代表可以执行 + mGTaskListHashMap = new HashMap(); + //<>代表Java的泛型,就是创建一个用类型作为参数的类。 + mGTaskHashMap = new HashMap(); + mMetaHashMap = new HashMap(); + mMetaList = null; + mLocalDeleteIdMap = new HashSet(); + mGidToNid = new HashMap(); //GoogleID to NodeID?? + mNidToGid = new HashMap(); //NodeID to GoogleID???通过hashmap散列表建立映射 + } + + /** + * 包含关键字synchronized，语言级同步，指明该函数可能运行在多线程的环境下。 + * 功能：类初始化函数 + * @author TTS + * @return GtaskManger + */ +public static synchronized GTaskManager getInstance() { + //可能运行在多线程环境下，使用语言级同步--synchronized + if (mInstance == null) { + mInstance = new GTaskManager(); + } + return mInstance; + } + + /** + * 包含关键字synchronized，语言级同步，指明该函数可能运行在多线程的环境下。 + * @author TTS + * @param activity + */ + public synchronized void setActivityContext(Activity activity) { + // used for getting auth token + mActivity = activity; + } + + /** + * 核心函数 + * 功能：实现了本地同步操作和远端同步操作 + * @author TTS + * @param context-----获取上下文 + * @param asyncTask-------用于同步的异步操作类 + * @return int + */ +public int sync(Context context, GTaskASyncTask asyncTask) { + //核心函数 + if (mSyncing) { + Log.d(TAG, "Sync is in progress"); + //创建日志文件（调试信息），debug + 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(); //getInstance即为创建一个实例,client--客户机 + client.resetUpdateArray(); +//JSONArray类型，reset即置为NULL + + // login google task + if (!mCancelled) { + if (!client.login(mActivity)) { + throw new NetworkFailureException("login google task failed"); + } + } + + // get the task list from google + asyncTask.publishProgess(mContext.getString(R.string.sync_progress_init_list)); + initGTaskList(); + //获取Google上的JSONtasklist转为本地TaskList + + // do content sync work + asyncTask.publishProgess(mContext.getString(R.string.sync_progress_syncing)); + syncContent(); + } catch (NetworkFailureException e) { + //分为两种异常，此类异常为网络异常 + Log.e(TAG, e.toString()); + //创建日志文件（调试信息），error + return STATE_NETWORK_ERROR; + } catch (ActionFailureException e) { + //此类异常为操作异常 + 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; + } + + /** + *功能：初始化GtaskList，获取Google上的JSONtasklist转为本地TaskList。 + *获得的数据存储在mMetaList，mGTaskListHashMap，mGTaskHashMap + *@author TTS + *@exception NetworkFailureException + *@return void + */ + private void initGTaskList() throws NetworkFailureException { + if (mCancelled) + return; + GTaskClient client = GTaskClient.getInstance(); +//getInstance即为创建一个实例，client应指远端客户机 + try { + //Json对象是Name Value对(即子元素)的无序集合，相当于一个Map对象。JsonObject类是bantouyan-json库对Json对象的抽象，提供操纵Json对象的各种方法。 + //其格式为{"key1":value1,"key2",value2....};key 必须是字符串。 + //因为ajax请求不刷新页面，但配合js可以实现局部刷新，因此json常常被用来作为异步请求的返回对象使用。 + JSONArray jsTaskLists = client.getTaskLists(); //原注释为get task list------lists + + // init meta list first + mMetaList = null; //TaskList类型 + for (int i = 0; i < jsTaskLists.length(); i++) { + JSONObject object = jsTaskLists.getJSONObject(i); //JSONObject与JSONArray一个为对象，一个为数组。此处取出单个JASONObject + +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(); //MetaList意为元表,Tasklist类型，此处为初始化 + mMetaList.setContentByRemoteJSON(object); + //将JSON中部分数据复制到自己定义的对象中相对应的数据：name->mname... + + // load meta data + JSONArray jsMetas = client.getTaskList(gid); + //原注释为get action_list------list + for (int j = 0; j < jsMetas.length(); j++) { + object = (JSONObject) jsMetas.getJSONObject(j); + MetaData metaData = new MetaData(); //继承自Node + metaData.setContentByRemoteJSON(object); + if (metaData.isWorthSaving()) { + //if not worth to save，metadata将不加入mMetaList + 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); +//通过getString函数传入本地某个标志数据的名称，获取其在远端的名称。 + 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(); //继承自Node + tasklist.setContentByRemoteJSON(object); + mGTaskListHashMap.put(gid, tasklist); + mGTaskHashMap.put(gid, tasklist); + //加两遍 + + // 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"); + } + } + + /** + * 功能：本地内容同步操作 + * @throws NetworkFailureException + * @return 无返回值 + */ +private void syncContent() throws NetworkFailureException { + //本地内容同步操作 + int syncType; + Cursor c = null; + //数据库指针 + String gid; //GoogleID + Node node; //Node包含Sync_Action的不同类型 + + mLocalDeleteIdMap.clear(); //HashSet类型 + + 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)); //通过hashmap建立联系 + mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid); //通过hashmap建立联系 + 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(); //Iterator迭代器 + 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 //thread----线程 + // 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(); + } + + } + + /** + * 功能： + * @author TTS + * @throws NetworkFailureException + */ + 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(); + } + + /** + * 功能：syncType分类，addLocalNode，addRemoteNode，deleteNode，updateLocalNode，updateRemoteNode + * @author TTS + * @param syncType + * @param node + * @param c + * @throws NetworkFailureException + */ + 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"); + } + } + + /** + * 功能：本地增加Node + * @author TTS + * @param node + * @throws NetworkFailureException + */ + 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); + } + + /** + * 功能：update本地node + * @author TTS + * @param node + * ----同步操作的基础数据类型 + * @param c + * ----Cursor + * @throws NetworkFailureException + */ + 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); + } + + /** + * 功能：远程增加Node + * 需要updateRemoteMeta + * @author TTS + * @param node + * ----同步操作的基础数据类型 + * @param c + * --Cursor + * @throws NetworkFailureException + */ + private void addRemoteNode(Node node, Cursor c) throws NetworkFailureException { + if (mCancelled) { + return; + } + + SqlNote sqlNote = new SqlNote(mContext, c); //从本地mContext中获取内容 + 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"); //调试信息 + throw new ActionFailureException("cannot add remote task"); + } + mGTaskListHashMap.get(parentGid).addChildTask(task); //在本地生成的GTaskList中增加子结点 + + //登录远程服务器，创建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迭代器，通过统一的接口迭代所有的map元素 + 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 //创建id间的映射 + mGidToNid.put(n.getGid(), sqlNote.getId()); + mNidToGid.put(sqlNote.getId(), n.getGid()); + } + + /** + * 功能：更新远端的Node，包含meta更新(updateRemoteMeta) + * @author TTS + * @param node + * ----同步操作的基础数据类型 + * @param c + * --Cursor + * @throws NetworkFailureException + */ + 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); //GTaskClient用途为从本地登陆远端服务器 + + // update meta + updateRemoteMeta(node.getGid(), sqlNote); + + // move task if necessary + if (sqlNote.isNoteType()) { + Task task = (Task) node; + TaskList preParentList = task.getParent(); + //preParentList为通过node获取的父节点列表 + + String curParentGid = mNidToGid.get(sqlNote.getParentId()); + //curParentGid为通过光标在数据库中找到sqlNote的mParentId，再通过mNidToGid由long类型转为String类型的Gid + + if (curParentGid == null) { + Log.e(TAG, "cannot find task's parent tasklist"); + throw new ActionFailureException("cannot update remote task"); + } + TaskList curParentList = mGTaskListHashMap.get(curParentGid); + //通过HashMap找到对应Gid的TaskList + + if (preParentList != curParentList) +{ + preParentList.removeChildTask(task); + curParentList.addChildTask(task); + GTaskClient.getInstance().moveTask(task, preParentList, curParentList); + } + } + + // clear local modified flag + sqlNote.resetLocalModified(); + //commit到本地数据库 + sqlNote.commit(true); + } + + /** + * 功能：升级远程meta。 meta---元数据----计算机文件系统管理数据---管理数据的数据。 + * @author TTS + * @param gid + * ---GoogleID为String类型 + * @param sqlNote + * ---同步前的数据库操作，故使用类SqlNote + * @throws 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); + } + } + } + + /** + * 功能：刷新本地，给sync的ID对应上最后更改过的对象 + * @author TTS + * @return void + * @throws NetworkFailureException + */ + private void refreshLocalSyncId() throws NetworkFailureException { + if (mCancelled) { + return; + } + + // get the latest gtask list //获取最近的（最晚的） +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"); //query语句：五个参数，NoteColumns.TYPE + " DESC"-----为按类型递减顺序返回查询结果。new String[] {String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)}------为选择参数。"(type<>? AND parent_id<>?)"-------指明返回行过滤器。SqlNote.PROJECTION_NOTE--------应返回的数据列的名字。Notes.CONTENT_NOTE_URI--------contentProvider包含所有数据集所对应的uri + 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(); //在ContentValues中创建键值对。准备通过contentResolver写入数据 + values.put(NoteColumns.SYNC_ID, node.getLastModified()); + mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, //进行批量更改，选择参数为NULL，应该可以用insert替换，参数分别为表名和需要更新的value对象。 + 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; + } + } + } + + /** + * 功能：获取同步账号,mAccount.name + * @author TTS + * @return String + */ + public String getSyncAccount() { + return GTaskClient.getInstance().getSyncAccount().name; + } + + /** + * 功能：取消同步，置mCancelled为true + * @author TTS + */ + public void cancelSync() { + mCancelled = true; + } +} +5、GTaskSyncService.java +package net.micode.notes.gtask.remote; + +/* + * Service是在一段不定的时间运行在后台，不和用户交互的应用组件 + * 主要方法： + * private void startSync() 启动一个同步工作 + * private void cancelSync() 取消同步 + * public void onCreate() + * public int onStartCommand(Intent intent, int flags, int startId) service生命周期的组成部分，相当于重启service（比如在被暂停之后），而不是创建一个新的service + * public void onLowMemory() 在没有内存的情况下如果存在service则结束掉这的service + * public IBinder onBind() + * public void sendBroadcast(String msg) 发送同步的相关通知 + * public static void startSync(Activity activity) + * public static void cancelSync(Context context) + * public static boolean isSyncing() 判读是否在进行同步 + * public static String getProgressString() 获取当前进度的信息 + */ + +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 = ""; + + //开始一个同步的工作 + private void startSync() { + if (mSyncTask == null) { + mSyncTask = new GTaskASyncTask(this, new GTaskASyncTask.OnCompleteListener() { + public void onComplete() { + mSyncTask = null; + sendBroadcast(""); + stopSelf(); + } + }); + sendBroadcast(""); + mSyncTask.execute(); //这个函数让任务是以单线程队列方式或线程池队列方式运行 + } + } + + + private void cancelSync() { + if (mSyncTask != null) { + mSyncTask.cancelSync(); + } + } + + @Override + public void onCreate() { //初始化一个service + mSyncTask = null; + } + + @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)) { + //两种情况，开始同步或者取消同步 + case ACTION_START_SYNC: + startSync(); + break; + case ACTION_CANCEL_SYNC: + cancelSync(); + break; + default: + break; + } + return START_STICKY; //等待新的intent来是这个service继续运行 + } + return super.onStartCommand(intent, flags, startId); + } + + @Override + public void onLowMemory() { + if (mSyncTask != null) { + mSyncTask.cancelSync(); + } + } + + public IBinder onBind(Intent intent) { //不知道干吗用的 + return null; + } + + public void sendBroadcast(String msg) { + mSyncProgress = msg; + Intent intent = new Intent(GTASK_SERVICE_BROADCAST_NAME); //创建一个新的Intent + intent.putExtra(GTASK_SERVICE_BROADCAST_IS_SYNCING, mSyncTask != null); //附加INTENT中的相应参数的值 + intent.putExtra(GTASK_SERVICE_BROADCAST_PROGRESS_MSG, msg); + sendBroadcast(intent); //发送这个通知 + } + + public static void startSync(Activity activity) {//执行一个service，service的内容里的同步动作就是开始同步 + GTaskManager.getInstance().setActivityContext(activity); + Intent intent = new Intent(activity, GTaskSyncService.class); + intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_START_SYNC); + activity.startService(intent); + } + + public static void cancelSync(Context context) {//执行一个service，service的内容里的同步动作就是取消同步 + Intent intent = new Intent(context, GTaskSyncService.class); + intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_CANCEL_SYNC); + context.startService(intent); + } + + public static boolean isSyncing() { + return mSyncTask != null; + } +