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@ -31,65 +31,81 @@ import org.json.JSONArray;
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import org.json.JSONException;
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import org.json.JSONObject;
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/**
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* Task类
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* 表示Google Task中的一个任务(对应笔记应用中的一个笔记)
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* 继承自Node类,增加了任务特有的属性和方法
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*/
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public class Task extends Node {
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// 日志标签
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private static final String TAG = Task.class.getSimpleName();
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// 任务是否已完成
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private boolean mCompleted;
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// 任务备注/笔记内容
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private String mNotes;
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// 元信息JSON对象(包含本地数据库信息)
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private JSONObject mMetaInfo;
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// 前一个兄弟任务(用于保持任务顺序)
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private Task mPriorSibling;
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// 父任务列表
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private TaskList mParent;
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/**
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* 构造函数
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* 初始化任务的默认值
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*/
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public Task() {
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super();
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mCompleted = false;
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mNotes = null;
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mPriorSibling = null;
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mParent = null;
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mMetaInfo = null;
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mCompleted = false; // 默认未完成
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mNotes = null; // 默认无备注
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mPriorSibling = null; // 默认无前兄弟
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mParent = null; // 默认无父列表
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mMetaInfo = null; // 默认无元信息
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}
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/**
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* 获取创建动作的JSON对象
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* 用于将任务创建到Google Tasks服务器
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* @param actionId 动作ID
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* @return 创建动作的JSON对象
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*/
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public JSONObject getCreateAction(int actionId) {
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JSONObject js = new JSONObject();
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try {
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// action_type
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// 动作类型:创建
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js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
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GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE);
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// action_id
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// 动作ID
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js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
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// index
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// 索引位置(在父列表中的位置)
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js.put(GTaskStringUtils.GTASK_JSON_INDEX, mParent.getChildTaskIndex(this));
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// entity_delta
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// 实体增量(包含任务信息)
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JSONObject entity = new JSONObject();
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entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
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entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null");
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entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName()); // 任务名称
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entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null"); // 创建者ID
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entity.put(GTaskStringUtils.GTASK_JSON_ENTITY_TYPE,
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GTaskStringUtils.GTASK_JSON_TYPE_TASK);
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GTaskStringUtils.GTASK_JSON_TYPE_TASK); // 实体类型:任务
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if (getNotes() != null) {
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entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes());
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entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes()); // 任务备注
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}
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js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
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// parent_id
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// 父节点ID
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js.put(GTaskStringUtils.GTASK_JSON_PARENT_ID, mParent.getGid());
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// dest_parent_type
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// 目标父节点类型
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js.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT_TYPE,
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GTaskStringUtils.GTASK_JSON_TYPE_GROUP);
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// list_id
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// 列表ID
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js.put(GTaskStringUtils.GTASK_JSON_LIST_ID, mParent.getGid());
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// prior_sibling_id
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// 前兄弟节点ID(用于确定插入位置)
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if (mPriorSibling != null) {
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js.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, mPriorSibling.getGid());
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}
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@ -103,27 +119,33 @@ public class Task extends Node {
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return js;
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}
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/**
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* 获取更新动作的JSON对象
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* 用于更新Google Tasks服务器上的任务
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* @param actionId 动作ID
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* @return 更新动作的JSON对象
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*/
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public JSONObject getUpdateAction(int actionId) {
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JSONObject js = new JSONObject();
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try {
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// action_type
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// 动作类型:更新
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js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
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GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE);
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// action_id
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// 动作ID
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js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
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// id
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// 任务ID
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js.put(GTaskStringUtils.GTASK_JSON_ID, getGid());
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// entity_delta
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// 实体增量(包含更新的任务信息)
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JSONObject entity = new JSONObject();
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entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
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entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName()); // 任务名称
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if (getNotes() != null) {
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entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes());
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entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes()); // 任务备注
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}
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entity.put(GTaskStringUtils.GTASK_JSON_DELETED, getDeleted());
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entity.put(GTaskStringUtils.GTASK_JSON_DELETED, getDeleted()); // 删除标志
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js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
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} catch (JSONException e) {
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@ -135,35 +157,40 @@ public class Task extends Node {
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return js;
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}
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/**
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* 从远程JSON设置内容
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* 将从Google Tasks服务器获取的JSON数据解析到任务对象中
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* @param js 远程JSON对象
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*/
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public void setContentByRemoteJSON(JSONObject js) {
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if (js != null) {
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try {
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// id
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// 任务ID
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if (js.has(GTaskStringUtils.GTASK_JSON_ID)) {
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setGid(js.getString(GTaskStringUtils.GTASK_JSON_ID));
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}
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// last_modified
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// 最后修改时间
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if (js.has(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)) {
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setLastModified(js.getLong(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED));
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}
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// name
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// 任务名称
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if (js.has(GTaskStringUtils.GTASK_JSON_NAME)) {
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setName(js.getString(GTaskStringUtils.GTASK_JSON_NAME));
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}
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// notes
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// 任务备注
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if (js.has(GTaskStringUtils.GTASK_JSON_NOTES)) {
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setNotes(js.getString(GTaskStringUtils.GTASK_JSON_NOTES));
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}
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// deleted
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// 删除标志
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if (js.has(GTaskStringUtils.GTASK_JSON_DELETED)) {
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setDeleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_DELETED));
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}
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// completed
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// 完成状态
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if (js.has(GTaskStringUtils.GTASK_JSON_COMPLETED)) {
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setCompleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_COMPLETED));
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}
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@ -175,6 +202,11 @@ public class Task extends Node {
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}
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}
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/**
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* 从本地JSON设置内容
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* 将本地数据库中的JSON数据解析到任务对象中
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* @param js 本地JSON对象
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*/
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public void setContentByLocalJSON(JSONObject js) {
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if (js == null || !js.has(GTaskStringUtils.META_HEAD_NOTE)
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|| !js.has(GTaskStringUtils.META_HEAD_DATA)) {
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@ -182,17 +214,21 @@ public class Task extends Node {
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}
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try {
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// 解析笔记信息
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JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
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JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
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// 验证笔记类型
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if (note.getInt(NoteColumns.TYPE) != Notes.TYPE_NOTE) {
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Log.e(TAG, "invalid type");
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return;
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}
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// 遍历数据数组,查找笔记内容
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for (int i = 0; i < dataArray.length(); i++) {
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JSONObject data = dataArray.getJSONObject(i);
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if (TextUtils.equals(data.getString(DataColumns.MIME_TYPE), DataConstants.NOTE)) {
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// 将笔记内容设置为任务名称
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setName(data.getString(DataColumns.CONTENT));
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break;
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}
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@ -204,41 +240,48 @@ public class Task extends Node {
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}
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}
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/**
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* 从内容获取本地JSON
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* 将任务对象转换为本地数据库存储的JSON格式
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* @return 本地JSON对象
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*/
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public JSONObject getLocalJSONFromContent() {
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String name = getName();
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try {
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if (mMetaInfo == null) {
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// new task created from web
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// 从Web创建的新任务(无元信息)
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if (name == null) {
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Log.w(TAG, "the note seems to be an empty one");
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return null;
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}
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// 创建新的JSON结构
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JSONObject js = new JSONObject();
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JSONObject note = new JSONObject();
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JSONArray dataArray = new JSONArray();
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JSONObject data = new JSONObject();
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data.put(DataColumns.CONTENT, name);
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data.put(DataColumns.CONTENT, name); // 笔记内容
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dataArray.put(data);
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js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);
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note.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
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js.put(GTaskStringUtils.META_HEAD_NOTE, note);
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js.put(GTaskStringUtils.META_HEAD_DATA, dataArray); // 数据部分
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note.put(NoteColumns.TYPE, Notes.TYPE_NOTE); // 笔记类型
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js.put(GTaskStringUtils.META_HEAD_NOTE, note); // 笔记信息
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return js;
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} else {
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// synced task
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// 已同步的任务(有元信息)
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JSONObject note = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
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JSONArray dataArray = mMetaInfo.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
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// 更新笔记内容
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for (int i = 0; i < dataArray.length(); i++) {
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JSONObject data = dataArray.getJSONObject(i);
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if (TextUtils.equals(data.getString(DataColumns.MIME_TYPE), DataConstants.NOTE)) {
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data.put(DataColumns.CONTENT, getName());
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data.put(DataColumns.CONTENT, getName()); // 更新笔记内容
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break;
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}
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}
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note.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
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return mMetaInfo;
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note.put(NoteColumns.TYPE, Notes.TYPE_NOTE); // 更新笔记类型
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return mMetaInfo; // 返回更新后的元信息
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}
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} catch (JSONException e) {
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Log.e(TAG, e.toString());
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@ -247,59 +290,75 @@ public class Task extends Node {
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}
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}
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/**
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* 设置元信息
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* 从MetaData对象中提取并解析元信息
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* @param metaData MetaData对象
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*/
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public void setMetaInfo(MetaData metaData) {
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if (metaData != null && metaData.getNotes() != null) {
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try {
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// 从备注中解析元信息JSON
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mMetaInfo = new JSONObject(metaData.getNotes());
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} catch (JSONException e) {
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Log.w(TAG, e.toString());
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mMetaInfo = null;
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mMetaInfo = null; // 解析失败时设置为null
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}
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}
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}
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/**
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* 获取同步动作
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* 根据本地数据库和远程状态确定需要的同步动作
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* @param c 数据库游标
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* @return 同步动作类型
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*/
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public int getSyncAction(Cursor c) {
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try {
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JSONObject noteInfo = null;
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if (mMetaInfo != null && mMetaInfo.has(GTaskStringUtils.META_HEAD_NOTE)) {
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// 从元信息中获取笔记信息
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noteInfo = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
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}
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if (noteInfo == null) {
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Log.w(TAG, "it seems that note meta has been deleted");
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return SYNC_ACTION_UPDATE_REMOTE;
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return SYNC_ACTION_UPDATE_REMOTE; // 元信息被删除,需要更新远程
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}
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if (!noteInfo.has(NoteColumns.ID)) {
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Log.w(TAG, "remote note id seems to be deleted");
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return SYNC_ACTION_UPDATE_LOCAL;
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return SYNC_ACTION_UPDATE_LOCAL; // 远程笔记ID被删除,需要更新本地
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}
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// validate the note id now
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// 验证笔记ID是否匹配
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if (c.getLong(SqlNote.ID_COLUMN) != noteInfo.getLong(NoteColumns.ID)) {
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Log.w(TAG, "note id doesn't match");
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return SYNC_ACTION_UPDATE_LOCAL;
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return SYNC_ACTION_UPDATE_LOCAL; // ID不匹配,需要更新本地
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}
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// 检查本地修改标志
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if (c.getInt(SqlNote.LOCAL_MODIFIED_COLUMN) == 0) {
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// there is no local update
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// 无本地更新
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if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
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// no update both side
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// 两端均无更新
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return SYNC_ACTION_NONE;
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} else {
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// apply remote to local
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// 将远程更新应用到本地
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return SYNC_ACTION_UPDATE_LOCAL;
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}
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} else {
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// validate gtask id
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// 有本地更新
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// 验证Google Task ID是否匹配
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if (!c.getString(SqlNote.GTASK_ID_COLUMN).equals(getGid())) {
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Log.e(TAG, "gtask id doesn't match");
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return SYNC_ACTION_ERROR;
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return SYNC_ACTION_ERROR; // ID不匹配,返回错误
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}
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if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
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// local modification only
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// 只有本地有修改
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return SYNC_ACTION_UPDATE_REMOTE;
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} else {
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// 两端都有修改,发生冲突
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return SYNC_ACTION_UPDATE_CONFLICT;
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}
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}
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@ -308,14 +367,21 @@ public class Task extends Node {
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e.printStackTrace();
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}
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return SYNC_ACTION_ERROR;
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return SYNC_ACTION_ERROR; // 发生异常,返回错误
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}
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/**
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* 检查是否值得保存
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* 判断任务是否有足够的信息值得保存到本地数据库
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* @return 是否值得保存
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*/
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public boolean isWorthSaving() {
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|
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return mMetaInfo != null || (getName() != null && getName().trim().length() > 0)
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|| (getNotes() != null && getNotes().trim().length() > 0);
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}
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// 以下为属性的getter和setter方法
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public void setCompleted(boolean completed) {
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|
this.mCompleted = completed;
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}
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@ -347,5 +413,4 @@ public class Task extends Node {
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public TaskList getParent() {
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|
|
return this.mParent;
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|
}
|
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|
}
|
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|
}
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