GTaskStringUtils注释

java/net/micode/notes/data/Contact.java

@@ -25,49 +25,72 @@ import android.util.Log;
 
 import java.util.HashMap;
 
+/**
+ * 该类用于根据电话号码从联系人数据库中获取联系人姓名，并对获取结果进行缓存，避免重复查询。
+ */
 public class Contact {
+    // 用于缓存电话号码和对应的联系人姓名，避免重复查询联系人数据库
     private static HashMap<String, String> sContactCache;
+    // 日志标签，方便调试和日志记录
     private static final String TAG = "Contact";
 
+    // 查询联系人姓名的SQL语句模板，根据电话号码匹配联系人信息
     private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
-    + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
+            + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
-    + " AND " + Data.RAW_CONTACT_ID + " IN "
+            + " AND " + Data.RAW_CONTACT_ID + " IN "
             + "(SELECT raw_contact_id "
             + " FROM phone_lookup"
             + " WHERE min_match = '+')";
 
+    /**
+     * 根据电话号码获取联系人姓名。
+     * 如果联系人姓名已缓存，则直接从缓存中获取；否则，查询联系人数据库并将结果缓存。
+     *
+     * @param context     上下文对象，用于访问内容解析器
+     * @param phoneNumber 要查询的电话号码
+     * @return 联系人姓名，如果未找到匹配的联系人则返回null
+     */
     public static String getContact(Context context, String phoneNumber) {
-        if(sContactCache == null) {
+        // 初始化联系人缓存
+        if (sContactCache == null) {
             sContactCache = new HashMap<String, String>();
         }
 
-        if(sContactCache.containsKey(phoneNumber)) {
+        // 检查缓存中是否已存在该电话号码对应的联系人姓名
+        if (sContactCache.containsKey(phoneNumber)) {
             return sContactCache.get(phoneNumber);
         }
 
+        // 替换SQL语句模板中的占位符，生成最终的查询语句
         String selection = CALLER_ID_SELECTION.replace("+",
                 PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
+        // 查询联系人数据库
         Cursor cursor = context.getContentResolver().query(
                 Data.CONTENT_URI,
-                new String [] { Phone.DISPLAY_NAME },
+                new String[]{Phone.DISPLAY_NAME},
                 selection,
-                new String[] { phoneNumber },
+                new String[]{phoneNumber},
                 null);
 
         if (cursor != null && cursor.moveToFirst()) {
             try {
+                // 获取联系人姓名
                 String name = cursor.getString(0);
+                // 将电话号码和联系人姓名存入缓存
                 sContactCache.put(phoneNumber, name);
                 return name;
             } catch (IndexOutOfBoundsException e) {
+                // 处理游标获取字符串时可能出现的索引越界异常
                 Log.e(TAG, " Cursor get string error " + e.toString());
                 return null;
             } finally {
+                // 关闭游标，释放资源
                 cursor.close();
             }
         } else {
+            // 未找到匹配的联系人，记录日志
             Log.d(TAG, "No contact matched with number:" + phoneNumber);
             return null;
         }
     }
-}
+}

java/net/micode/notes/data/Notes.java

@@ -17,234 +17,259 @@
 package net.micode.notes.data;
 
 import android.net.Uri;
+
+/**
+ * 该类定义了便签应用的常量，包括权限、类型、系统文件夹ID、URI等。
+ * 这些常量用于统一管理便签应用的数据和操作。
+ */
 public class Notes {
+    // 内容提供者的权限
     public static final String AUTHORITY = "micode_notes";
+    // 日志标签，方便调试和日志记录
     public static final String TAG = "Notes";
-    public static final int TYPE_NOTE     = 0;
+    // 便签类型
-    public static final int TYPE_FOLDER   = 1;
+    public static final int TYPE_NOTE = 0;
-    public static final int TYPE_SYSTEM   = 2;
+    // 文件夹类型
+    public static final int TYPE_FOLDER = 1;
+    // 系统类型
+    public static final int TYPE_SYSTEM = 2;
 
     /**
-     * Following IDs are system folders' identifiers
+     * 以下ID是系统文件夹的标识符
-     * {@link Notes#ID_ROOT_FOLDER } is default folder
+     * {@link Notes#ID_ROOT_FOLDER } 是默认文件夹
-     * {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder
+     * {@link Notes#ID_TEMPARAY_FOLDER } 用于存储不属于任何文件夹的便签
-     * {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records
+     * {@link Notes#ID_CALL_RECORD_FOLDER} 用于存储通话记录
      */
     public static final int ID_ROOT_FOLDER = 0;
     public static final int ID_TEMPARAY_FOLDER = -1;
     public static final int ID_CALL_RECORD_FOLDER = -2;
     public static final int ID_TRASH_FOLER = -3;
 
+    // 意图额外数据的键，用于传递提醒日期
     public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date";
+    // 意图额外数据的键，用于传递背景颜色ID
     public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id";
+    // 意图额外数据的键，用于传递小部件ID
     public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id";
+    // 意图额外数据的键，用于传递小部件类型
     public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type";
+    // 意图额外数据的键，用于传递文件夹ID
     public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id";
+    // 意图额外数据的键，用于传递通话日期
     public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date";
 
-    public static final int TYPE_WIDGET_INVALIDE      = -1;
+    // 无效的小部件类型
-    public static final int TYPE_WIDGET_2X            = 0;
+    public static final int TYPE_WIDGET_INVALIDE = -1;
-    public static final int TYPE_WIDGET_4X            = 1;
+    // 2x大小的小部件类型
+    public static final int TYPE_WIDGET_2X = 0;
+    // 4x大小的小部件类型
+    public static final int TYPE_WIDGET_4X = 1;
 
+    /**
+     * 数据常量类，定义了不同类型数据的MIME类型
+     */
     public static class DataConstants {
+        // 文本便签的MIME类型
         public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;
+        // 通话便签的MIME类型
         public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;
     }
 
     /**
-     * Uri to query all notes and folders
+     * 用于查询所有便签和文件夹的URI
      */
     public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
 
     /**
-     * Uri to query data
+     * 用于查询数据的URI
      */
     public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
 
+    /**
+     * 便签表的列接口，定义了便签表的列名和数据类型
+     */
     public interface NoteColumns {
         /**
-         * The unique ID for a row
+         * 行的唯一ID
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String ID = "_id";
 
         /**
-         * The parent's id for note or folder
+         * 便签或文件夹的父ID
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String PARENT_ID = "parent_id";
 
         /**
-         * Created data for note or folder
+         * 便签或文件夹的创建日期
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String CREATED_DATE = "created_date";
 
         /**
-         * Latest modified date
+         * 最新修改日期
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String MODIFIED_DATE = "modified_date";
 
-
         /**
-         * Alert date
+         * 提醒日期
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String ALERTED_DATE = "alert_date";
 
         /**
-         * Folder's name or text content of note
+         * 文件夹名称或便签的文本内容
-         * <P> Type: TEXT </P>
+         * <P> 类型: TEXT </P>
          */
         public static final String SNIPPET = "snippet";
 
         /**
-         * Note's widget id
+         * 便签的小部件ID
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String WIDGET_ID = "widget_id";
 
         /**
-         * Note's widget type
+         * 便签的小部件类型
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String WIDGET_TYPE = "widget_type";
 
         /**
-         * Note's background color's id
+         * 便签的背景颜色ID
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String BG_COLOR_ID = "bg_color_id";
 
         /**
-         * For text note, it doesn't has attachment, for multi-media
+         * 对于文本便签，没有附件；对于多媒体便签，至少有一个附件
-         * note, it has at least one attachment
+         * <P> 类型: INTEGER </P>
-         * <P> Type: INTEGER </P>
          */
         public static final String HAS_ATTACHMENT = "has_attachment";
 
         /**
-         * Folder's count of notes
+         * 文件夹中的便签数量
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String NOTES_COUNT = "notes_count";
 
         /**
-         * The file type: folder or note
+         * 文件类型：文件夹或便签
-         * <P> Type: INTEGER </P>
+         * <P> 类型: INTEGER </P>
          */
         public static final String TYPE = "type";
 
         /**
-         * The last sync id
+         * 最后同步ID
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String SYNC_ID = "sync_id";
 
         /**
-         * Sign to indicate local modified or not
+         * 标记是否本地修改
-         * <P> Type: INTEGER </P>
+         * <P> 类型: INTEGER </P>
          */
         public static final String LOCAL_MODIFIED = "local_modified";
 
         /**
-         * Original parent id before moving into temporary folder
+         * 移动到临时文件夹之前的原始父ID
-         * <P> Type : INTEGER </P>
+         * <P> 类型 : INTEGER </P>
          */
         public static final String ORIGIN_PARENT_ID = "origin_parent_id";
 
         /**
-         * The gtask id
+         * GTask ID
-         * <P> Type : TEXT </P>
+         * <P> 类型 : TEXT </P>
          */
         public static final String GTASK_ID = "gtask_id";
 
         /**
-         * The version code
+         * 版本号
-         * <P> Type : INTEGER (long) </P>
+         * <P> 类型 : INTEGER (long) </P>
          */
         public static final String VERSION = "version";
     }
 
+    /**
+     * 数据表的列接口，定义了数据表的列名和数据类型
+     */
     public interface DataColumns {
         /**
-         * The unique ID for a row
+         * 行的唯一ID
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String ID = "_id";
 
         /**
-         * The MIME type of the item represented by this row.
+         * 该行所代表的项的MIME类型
-         * <P> Type: Text </P>
+         * <P> 类型: Text </P>
          */
         public static final String MIME_TYPE = "mime_type";
 
         /**
-         * The reference id to note that this data belongs to
+         * 该数据所属便签的引用ID
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String NOTE_ID = "note_id";
 
         /**
-         * Created data for note or folder
+         * 便签或文件夹的创建日期
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String CREATED_DATE = "created_date";
 
         /**
-         * Latest modified date
+         * 最新修改日期
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String MODIFIED_DATE = "modified_date";
 
         /**
-         * Data's content
+         * 数据的内容
-         * <P> Type: TEXT </P>
+         * <P> 类型: TEXT </P>
          */
         public static final String CONTENT = "content";
 
-
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * 通用数据列，含义取决于{@link #MIMETYPE}，用于整数类型数据
-         * integer data type
+         * <P> 类型: INTEGER </P>
-         * <P> Type: INTEGER </P>
          */
         public static final String DATA1 = "data1";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * 通用数据列，含义取决于{@link #MIMETYPE}，用于整数类型数据
-         * integer data type
+         * <P> 类型: INTEGER </P>
-         * <P> Type: INTEGER </P>
          */
         public static final String DATA2 = "data2";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * 通用数据列，含义取决于{@link #MIMETYPE}，用于文本类型数据
-         * TEXT data type
+         * <P> 类型: TEXT </P>
-         * <P> Type: TEXT </P>
          */
         public static final String DATA3 = "data3";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * 通用数据列，含义取决于{@link #MIMETYPE}，用于文本类型数据
-         * TEXT data type
+         * <P> 类型: TEXT </P>
-         * <P> Type: TEXT </P>
          */
         public static final String DATA4 = "data4";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * 通用数据列，含义取决于{@link #MIMETYPE}，用于文本类型数据
-         * TEXT data type
+         * <P> 类型: TEXT </P>
-         * <P> Type: TEXT </P>
          */
         public static final String DATA5 = "data5";
     }
 
+    /**
+     * 文本便签类，继承自DataColumns接口，定义了文本便签的特定常量和URI
+     */
     public static final class TextNote implements DataColumns {
         /**
-         * Mode to indicate the text in check list mode or not
+         * 指示文本是否处于检查列表模式的模式
-         * <P> Type: Integer 1:check list mode 0: normal mode </P>
+         * <P> 类型: Integer 1:检查列表模式 0:正常模式 </P>
          */
         public static final String MODE = DATA1;
 
@@ -257,16 +282,19 @@ public class Notes {
         public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
     }
 
+    /**
+     * 通话便签类，继承自DataColumns接口，定义了通话便签的特定常量和URI
+     */
     public static final class CallNote implements DataColumns {
         /**
-         * Call date for this record
+         * 该记录的通话日期
-         * <P> Type: INTEGER (long) </P>
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String CALL_DATE = DATA1;
 
         /**
-         * Phone number for this record
+         * 该记录的电话号码
-         * <P> Type: TEXT </P>
+         * <P> 类型: TEXT </P>
          */
         public static final String PHONE_NUMBER = DATA3;
 
@@ -276,4 +304,4 @@ public class Notes {
 
         public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
     }
-}
+}

java/net/micode/notes/data/NotesDatabaseHelper.java

@@ -26,198 +26,230 @@ import net.micode.notes.data.Notes.DataColumns;
 import net.micode.notes.data.Notes.DataConstants;
 import net.micode.notes.data.Notes.NoteColumns;
 
-
+/**
+ * 该类用于管理便签数据库的创建、升级和表结构维护。
+ * 它继承自SQLiteOpenHelper，提供了创建便签表和数据记录表的方法，以及处理数据库版本升级的逻辑。
+ */
 public class NotesDatabaseHelper extends SQLiteOpenHelper {
+    // 数据库文件名
     private static final String DB_NAME = "note.db";
-
+    // 数据库版本号
     private static final int DB_VERSION = 4;
 
+    /**
+     * 定义数据库表名的接口
+     */
     public interface TABLE {
+        // 便签表名
         public static final String NOTE = "note";
-
+        // 数据记录表名
         public static final String DATA = "data";
     }
 
+    // 日志标签，方便调试和日志记录
     private static final String TAG = "NotesDatabaseHelper";
-
+    // 单例实例
     private static NotesDatabaseHelper mInstance;
 
+    // 创建便签表的SQL语句
     private static final String CREATE_NOTE_TABLE_SQL =
-        "CREATE TABLE " + TABLE.NOTE + "(" +
+            "CREATE TABLE " + TABLE.NOTE + "(" +
-            NoteColumns.ID + " INTEGER PRIMARY KEY," +
+                    NoteColumns.ID + " INTEGER PRIMARY KEY," +
-            NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.BG_COLOR_ID + " 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.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
-            NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+                    NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
-            NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
+                    NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
-            NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
+                    NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
-            NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
+                    NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
-            NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
+                    NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
-        ")";
+                    ")";
-
+
+    // 创建数据记录表的SQL语句
     private static final String CREATE_DATA_TABLE_SQL =
-        "CREATE TABLE " + TABLE.DATA + "(" +
+            "CREATE TABLE " + TABLE.DATA + "(" +
-            DataColumns.ID + " INTEGER PRIMARY KEY," +
+                    DataColumns.ID + " INTEGER PRIMARY KEY," +
-            DataColumns.MIME_TYPE + " TEXT NOT NULL," +
+                    DataColumns.MIME_TYPE + " TEXT NOT NULL," +
-            DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+                    NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
-            NoteColumns.MODIFIED_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.CONTENT + " TEXT NOT NULL DEFAULT ''," +
-            DataColumns.DATA1 + " INTEGER," +
+                    DataColumns.DATA1 + " INTEGER," +
-            DataColumns.DATA2 + " INTEGER," +
+                    DataColumns.DATA2 + " INTEGER," +
-            DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
+                    DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
-            DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
+                    DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
-            DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
+                    DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
-        ")";
+                    ")";
-
+
+    // 创建数据记录表中note_id索引的SQL语句
     private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
-        "CREATE INDEX IF NOT EXISTS note_id_index ON " +
+            "CREATE INDEX IF NOT EXISTS note_id_index ON " +
-        TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
+                    TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
 
     /**
-     * Increase folder's note count when move note to the folder
+     * 当便签移动到文件夹时，增加文件夹便签数量的触发器SQL语句
      */
     private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
-        "CREATE TRIGGER increase_folder_count_on_update "+
+            "CREATE TRIGGER increase_folder_count_on_update " +
-        " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
+                    " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
-        " BEGIN " +
+                    " BEGIN " +
-        "  UPDATE " + TABLE.NOTE +
+                    "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
-        "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+                    "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
-        " END";
+                    " END";
 
     /**
-     * Decrease folder's note count when move note from folder
+     * 当便签从文件夹移出时，减少文件夹便签数量的触发器SQL语句
      */
     private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
-        "CREATE TRIGGER decrease_folder_count_on_update " +
+            "CREATE TRIGGER decrease_folder_count_on_update " +
-        " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
+                    " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
-        " BEGIN " +
+                    " BEGIN " +
-        "  UPDATE " + TABLE.NOTE +
+                    "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
-        "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+                    "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
-        "  AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
+                    "  AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
-        " END";
+                    " END";
 
     /**
-     * Increase folder's note count when insert new note to the folder
+     * 当插入新便签到文件夹时，增加文件夹便签数量的触发器SQL语句
      */
     private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
-        "CREATE TRIGGER increase_folder_count_on_insert " +
+            "CREATE TRIGGER increase_folder_count_on_insert " +
-        " AFTER INSERT ON " + TABLE.NOTE +
+                    " AFTER INSERT ON " + TABLE.NOTE +
-        " BEGIN " +
+                    " BEGIN " +
-        "  UPDATE " + TABLE.NOTE +
+                    "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
-        "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+                    "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
-        " END";
+                    " END";
 
     /**
-     * Decrease folder's note count when delete note from the folder
+     * 当从文件夹删除便签时，减少文件夹便签数量的触发器SQL语句
      */
     private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
-        "CREATE TRIGGER decrease_folder_count_on_delete " +
+            "CREATE TRIGGER decrease_folder_count_on_delete " +
-        " AFTER DELETE ON " + TABLE.NOTE +
+                    " AFTER DELETE ON " + TABLE.NOTE +
-        " BEGIN " +
+                    " BEGIN " +
-        "  UPDATE " + TABLE.NOTE +
+                    "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
-        "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+                    "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
-        "  AND " + NoteColumns.NOTES_COUNT + ">0;" +
+                    "  AND " + NoteColumns.NOTES_COUNT + ">0;" +
-        " END";
+                    " END";
 
     /**
-     * Update note's content when insert data with type {@link DataConstants#NOTE}
+     * 当插入类型为笔记的数据时，更新便签内容的触发器SQL语句
      */
     private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
-        "CREATE TRIGGER update_note_content_on_insert " +
+            "CREATE TRIGGER update_note_content_on_insert " +
-        " AFTER INSERT ON " + TABLE.DATA +
+                    " AFTER INSERT ON " + TABLE.DATA +
-        " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+                    " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
-        " BEGIN" +
+                    " BEGIN" +
-        "  UPDATE " + TABLE.NOTE +
+                    "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+                    "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
-        "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+                    "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
-        " END";
+                    " END";
 
     /**
-     * Update note's content when data with {@link DataConstants#NOTE} type has changed
+     * 当类型为笔记的数据更新时，更新便签内容的触发器SQL语句
      */
     private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
-        "CREATE TRIGGER update_note_content_on_update " +
+            "CREATE TRIGGER update_note_content_on_update " +
-        " AFTER UPDATE ON " + TABLE.DATA +
+                    " AFTER UPDATE ON " + TABLE.DATA +
-        " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+                    " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
-        " BEGIN" +
+                    " BEGIN" +
-        "  UPDATE " + TABLE.NOTE +
+                    "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+                    "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
-        "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+                    "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
-        " END";
+                    " END";
 
     /**
-     * Update note's content when data with {@link DataConstants#NOTE} type has deleted
+     * 当类型为笔记的数据删除时，更新便签内容的触发器SQL语句
      */
     private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
-        "CREATE TRIGGER update_note_content_on_delete " +
+            "CREATE TRIGGER update_note_content_on_delete " +
-        " AFTER delete ON " + TABLE.DATA +
+                    " AFTER delete ON " + TABLE.DATA +
-        " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+                    " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
-        " BEGIN" +
+                    " BEGIN" +
-        "  UPDATE " + TABLE.NOTE +
+                    "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.SNIPPET + "=''" +
+                    "   SET " + NoteColumns.SNIPPET + "=''" +
-        "  WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
+                    "  WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
-        " END";
+                    " END";
 
     /**
-     * Delete datas belong to note which has been deleted
+     * 当删除便签时，删除该便签相关数据的触发器SQL语句
      */
     private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
-        "CREATE TRIGGER delete_data_on_delete " +
+            "CREATE TRIGGER delete_data_on_delete " +
-        " AFTER DELETE ON " + TABLE.NOTE +
+                    " AFTER DELETE ON " + TABLE.NOTE +
-        " BEGIN" +
+                    " BEGIN" +
-        "  DELETE FROM " + TABLE.DATA +
+                    "  DELETE FROM " + TABLE.DATA +
-        "   WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
+                    "   WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+                    " END";
 
     /**
-     * Delete notes belong to folder which has been deleted
+     * 当删除文件夹时，删除该文件夹下所有便签的触发器SQL语句
      */
     private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
-        "CREATE TRIGGER folder_delete_notes_on_delete " +
+            "CREATE TRIGGER folder_delete_notes_on_delete " +
-        " AFTER DELETE ON " + TABLE.NOTE +
+                    " AFTER DELETE ON " + TABLE.NOTE +
-        " BEGIN" +
+                    " BEGIN" +
-        "  DELETE FROM " + TABLE.NOTE +
+                    "  DELETE FROM " + TABLE.NOTE +
-        "   WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
+                    "   WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+                    " END";
 
     /**
-     * Move notes belong to folder which has been moved to trash folder
+     * 当文件夹移动到回收站时，将该文件夹下所有便签移动到回收站的触发器SQL语句
      */
     private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
-        "CREATE TRIGGER folder_move_notes_on_trash " +
+            "CREATE TRIGGER folder_move_notes_on_trash " +
-        " AFTER UPDATE ON " + TABLE.NOTE +
+                    " AFTER UPDATE ON " + TABLE.NOTE +
-        " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
+                    " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
-        " BEGIN" +
+                    " BEGIN" +
-        "  UPDATE " + TABLE.NOTE +
+                    "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
+                    "   SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
-        "  WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
+                    "  WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+                    " END";
 
+    /**
+     * 构造函数，初始化数据库帮助类
+     *
+     * @param context 上下文对象
+     */
     public NotesDatabaseHelper(Context context) {
         super(context, DB_NAME, null, DB_VERSION);
     }
 
+    /**
+     * 创建便签表，包括执行创建表的SQL语句、重新创建触发器和创建系统文件夹
+     *
+     * @param db 数据库对象
+     */
     public void createNoteTable(SQLiteDatabase db) {
+        // 执行创建便签表的SQL语句
         db.execSQL(CREATE_NOTE_TABLE_SQL);
+        // 重新创建便签表的触发器
         reCreateNoteTableTriggers(db);
+        // 创建系统文件夹
         createSystemFolder(db);
+        // 记录日志，表明便签表已创建
         Log.d(TAG, "note table has been created");
     }
 
+    /**
+     * 重新创建便签表的触发器，包括删除旧触发器并创建新触发器
+     *
+     * @param db 数据库对象
+     */
     private void reCreateNoteTableTriggers(SQLiteDatabase db) {
+        // 删除旧的触发器
         db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
         db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
         db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
@@ -226,6 +258,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
         db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
 
+        // 创建新的触发器
         db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
         db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
         db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
@@ -235,18 +268,23 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
     }
 
+    /**
+     * 创建系统文件夹，包括通话记录文件夹、根文件夹、临时文件夹和回收站文件夹
+     *
+     * @param db 数据库对象
+     */
     private void createSystemFolder(SQLiteDatabase db) {
         ContentValues values = new ContentValues();
 
         /**
-         * call record foler for call notes
+         * 通话记录文件夹，用于存储通话便签
          */
         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
+         * 根文件夹，默认文件夹
          */
         values.clear();
         values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
@@ -254,7 +292,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.insert(TABLE.NOTE, null, values);
 
         /**
-         * temporary folder which is used for moving note
+         * 临时文件夹，用于移动便签
          */
         values.clear();
         values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
@@ -262,7 +300,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.insert(TABLE.NOTE, null, values);
 
         /**
-         * create trash folder
+         * 创建回收站文件夹
          */
         values.clear();
         values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
@@ -270,23 +308,45 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.insert(TABLE.NOTE, null, values);
     }
 
+    /**
+     * 创建数据记录表，包括执行创建表的SQL语句、重新创建触发器和创建索引
+     *
+     * @param db 数据库对象
+     */
     public void createDataTable(SQLiteDatabase db) {
+        // 执行创建数据记录表的SQL语句
         db.execSQL(CREATE_DATA_TABLE_SQL);
+        // 重新创建数据记录表的触发器
         reCreateDataTableTriggers(db);
+        // 创建数据记录表中note_id的索引
         db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
+        // 记录日志，表明数据记录表已创建
         Log.d(TAG, "data table has been created");
     }
 
+    /**
+     * 重新创建数据记录表的触发器，包括删除旧触发器并创建新触发器
+     *
+     * @param db 数据库对象
+     */
     private void reCreateDataTableTriggers(SQLiteDatabase db) {
+        // 删除旧的触发器
         db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
         db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
         db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
 
+        // 创建新的触发器
         db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
         db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
         db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
     }
 
+    /**
+     * 获取单例实例
+     *
+     * @param context 上下文对象
+     * @return NotesDatabaseHelper实例
+     */
     static synchronized NotesDatabaseHelper getInstance(Context context) {
         if (mInstance == null) {
             mInstance = new NotesDatabaseHelper(context);
@@ -294,69 +354,106 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         return mInstance;
     }
 
+    /**
+     * 数据库创建时调用，创建便签表和数据记录表
+     *
+     * @param db 数据库对象
+     */
     @Override
     public void onCreate(SQLiteDatabase db) {
+        // 创建便签表
         createNoteTable(db);
+        // 创建数据记录表
         createDataTable(db);
     }
 
+    /**
+     * 数据库版本升级时调用，根据旧版本号执行相应的升级操作
+     *
+     * @param db         数据库对象
+     * @param oldVersion 旧版本号
+     * @param newVersion 新版本号
+     */
     @Override
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
         boolean reCreateTriggers = false;
         boolean skipV2 = false;
 
         if (oldVersion == 1) {
+            // 从版本1升级到版本2
             upgradeToV2(db);
-            skipV2 = true; // this upgrade including the upgrade from v2 to v3
+            skipV2 = true; // 此升级包含从版本2到版本3的升级
             oldVersion++;
         }
 
         if (oldVersion == 2 && !skipV2) {
+            // 从版本2升级到版本3
             upgradeToV3(db);
             reCreateTriggers = true;
             oldVersion++;
         }
 
         if (oldVersion == 3) {
+            // 从版本3升级到版本4
             upgradeToV4(db);
             oldVersion++;
         }
 
         if (reCreateTriggers) {
+            // 重新创建便签表和数据记录表的触发器
             reCreateNoteTableTriggers(db);
             reCreateDataTableTriggers(db);
         }
 
         if (oldVersion != newVersion) {
+            // 升级失败，抛出异常
             throw new IllegalStateException("Upgrade notes database to version " + newVersion
                     + "fails");
         }
     }
 
+    /**
+     * 从版本1升级到版本2，删除旧表并重新创建便签表和数据记录表
+     *
+     * @param db 数据库对象
+     */
     private void upgradeToV2(SQLiteDatabase db) {
+        // 删除旧的便签表和数据记录表
         db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
         db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
+        // 重新创建便签表和数据记录表
         createNoteTable(db);
         createDataTable(db);
     }
 
+    /**
+     * 从版本2升级到版本3，删除无用的触发器，添加gtask_id列和回收站文件夹
+     *
+     * @param db 数据库对象
+     */
     private void upgradeToV3(SQLiteDatabase db) {
-        // drop unused triggers
+        // 删除无用的触发器
         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
+        // 为便签表添加gtask_id列
         db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
                 + " TEXT NOT NULL DEFAULT ''");
-        // add a trash system folder
+        // 添加回收站文件夹
         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);
     }
 
+    /**
+     * 从版本3升级到版本4，为便签表添加version列
+     *
+     * @param db 数据库对象
+     */
     private void upgradeToV4(SQLiteDatabase db) {
+        // 为便签表添加version列
         db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
                 + " INTEGER NOT NULL DEFAULT 0");
     }
-}
+}

java/net/micode/notes/data/NotesProvider.java

@@ -16,7 +16,6 @@
 
 package net.micode.notes.data;
 
-
 import android.app.SearchManager;
 import android.content.ContentProvider;
 import android.content.ContentUris;
@@ -34,24 +33,31 @@ import net.micode.notes.data.Notes.DataColumns;
 import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.data.NotesDatabaseHelper.TABLE;
 
-
+/**
+ * 该类是一个内容提供者，用于处理对便签数据库的增删改查操作，并支持搜索功能。
+ * 它继承自ContentProvider，提供了对便签表和数据记录表的访问接口。
+ */
 public class NotesProvider extends ContentProvider {
+    // URI匹配器，用于匹配不同的URI请求
     private static final UriMatcher mMatcher;
-
+    // 数据库帮助类实例
     private NotesDatabaseHelper mHelper;
-
+    // 日志标签，方便调试和日志记录
     private static final String TAG = "NotesProvider";
 
-    private static final int URI_NOTE            = 1;
+    // 定义不同URI的匹配码
-    private static final int URI_NOTE_ITEM       = 2;
+    private static final int URI_NOTE = 1;
-    private static final int URI_DATA            = 3;
+    private static final int URI_NOTE_ITEM = 2;
-    private static final int URI_DATA_ITEM       = 4;
+    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 = 5;
-    private static final int URI_SEARCH_SUGGEST  = 6;
+    private static final int URI_SEARCH_SUGGEST = 6;
 
     static {
+        // 初始化URI匹配器
         mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+        // 添加不同URI的匹配规则
         mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
         mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM);
         mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA);
@@ -62,57 +68,82 @@ public class NotesProvider extends ContentProvider {
     }
 
     /**
-     * x'0A' represents the '\n' character in sqlite. For title and content in the search result,
+     * 便签搜索的投影，定义了搜索结果的列
-     * we will trim '\n' and white space in order to show more information.
+     * x'0A'表示sqlite中的'\n'字符，用于去除搜索结果中的换行符和空格，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 + ","
+            + 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_1 + ","
-        + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
+            + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
-        + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
+            + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
-        + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
+            + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
-        + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
+            + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
 
+    // 便签片段搜索的SQL查询语句
     private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
-        + " FROM " + TABLE.NOTE
+            + " FROM " + TABLE.NOTE
-        + " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
+            + " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
-        + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
+            + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
-        + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
+            + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
 
+    /**
+     * 内容提供者创建时调用，初始化数据库帮助类
+     *
+     * @return 创建成功返回true，否则返回false
+     */
     @Override
     public boolean onCreate() {
+        // 获取数据库帮助类实例
         mHelper = NotesDatabaseHelper.getInstance(getContext());
         return true;
     }
 
+    /**
+     * 处理查询请求，根据不同的URI匹配码执行相应的查询操作
+     *
+     * @param uri           请求的URI
+     * @param projection    查询的列
+     * @param selection     查询条件
+     * @param selectionArgs 查询条件的参数
+     * @param sortOrder     排序规则
+     * @return 查询结果的游标
+     */
     @Override
     public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
-            String sortOrder) {
+                        String sortOrder) {
         Cursor c = null;
+        // 获取可读数据库
         SQLiteDatabase db = mHelper.getReadableDatabase();
         String id = null;
         switch (mMatcher.match(uri)) {
             case URI_NOTE:
+                // 查询便签表
                 c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
                         sortOrder);
                 break;
             case URI_NOTE_ITEM:
+                // 获取便签ID
                 id = uri.getPathSegments().get(1);
+                // 查询指定ID的便签
                 c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id
                         + parseSelection(selection), selectionArgs, null, null, sortOrder);
                 break;
             case URI_DATA:
+                // 查询数据记录表
                 c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
                         sortOrder);
                 break;
             case URI_DATA_ITEM:
+                // 获取数据记录ID
                 id = uri.getPathSegments().get(1);
+                // 查询指定ID的数据记录
                 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) {
+                    // 搜索查询不允许指定排序规则和投影列
                     throw new IllegalArgumentException(
                             "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
                 }
@@ -120,59 +151,80 @@ public class NotesProvider extends ContentProvider {
                 String searchString = null;
                 if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
                     if (uri.getPathSegments().size() > 1) {
+                        // 从URI路径中获取搜索字符串
                         searchString = uri.getPathSegments().get(1);
                     }
                 } else {
+                    // 从URI查询参数中获取搜索字符串
                     searchString = uri.getQueryParameter("pattern");
                 }
 
                 if (TextUtils.isEmpty(searchString)) {
+                    // 搜索字符串为空，返回null
                     return null;
                 }
 
                 try {
+                    // 处理搜索字符串，添加通配符
                     searchString = String.format("%%%s%%", searchString);
+                    // 执行搜索查询
                     c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
-                            new String[] { searchString });
+                            new String[]{searchString});
                 } catch (IllegalStateException ex) {
+                    // 处理查询异常
                     Log.e(TAG, "got exception: " + ex.toString());
                 }
                 break;
             default:
+                // 未知URI，抛出异常
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
         if (c != null) {
+            // 设置游标通知URI，当数据变化时通知观察者
             c.setNotificationUri(getContext().getContentResolver(), uri);
         }
         return c;
     }
 
+    /**
+     * 处理插入请求，根据不同的URI匹配码将数据插入到相应的表中
+     *
+     * @param uri    请求的URI
+     * @param values 要插入的数据
+     * @return 插入数据的URI
+     */
     @Override
     public Uri insert(Uri uri, ContentValues values) {
+        // 获取可写数据库
         SQLiteDatabase db = mHelper.getWritableDatabase();
         long dataId = 0, noteId = 0, insertedId = 0;
         switch (mMatcher.match(uri)) {
             case URI_NOTE:
+                // 插入便签数据
                 insertedId = noteId = db.insert(TABLE.NOTE, null, values);
                 break;
             case URI_DATA:
                 if (values.containsKey(DataColumns.NOTE_ID)) {
+                    // 获取便签ID
                     noteId = values.getAsLong(DataColumns.NOTE_ID);
                 } else {
+                    // 数据格式错误，记录日志
                     Log.d(TAG, "Wrong data format without note id:" + values.toString());
                 }
+                // 插入数据记录
                 insertedId = dataId = db.insert(TABLE.DATA, null, values);
                 break;
             default:
+                // 未知URI，抛出异常
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
-        // Notify the note uri
+        // 通知便签URI数据变化
         if (noteId > 0) {
             getContext().getContentResolver().notifyChange(
                     ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
         }
 
-        // Notify the data uri
+        // 通知数据记录URI数据变化
         if (dataId > 0) {
             getContext().getContentResolver().notifyChange(
                     ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
@@ -181,96 +233,148 @@ public class NotesProvider extends ContentProvider {
         return ContentUris.withAppendedId(uri, insertedId);
     }
 
+    /**
+     * 处理删除请求，根据不同的URI匹配码从相应的表中删除数据
+     *
+     * @param uri           请求的URI
+     * @param selection     删除条件
+     * @param selectionArgs 删除条件的参数
+     * @return 删除的数据行数
+     */
     @Override
     public int delete(Uri uri, String selection, String[] selectionArgs) {
         int count = 0;
         String id = null;
+        // 获取可写数据库
         SQLiteDatabase db = mHelper.getWritableDatabase();
         boolean deleteData = false;
         switch (mMatcher.match(uri)) {
             case URI_NOTE:
+                // 处理删除便签的条件
                 selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
+                // 删除便签数据
                 count = db.delete(TABLE.NOTE, selection, selectionArgs);
                 break;
             case URI_NOTE_ITEM:
+                // 获取便签ID
                 id = uri.getPathSegments().get(1);
                 /**
-                 * ID that smaller than 0 is system folder which is not allowed to
+                 * ID小于0的是系统文件夹，不允许删除
-                 * trash
                  */
                 long noteId = Long.valueOf(id);
                 if (noteId <= 0) {
                     break;
                 }
+                // 删除指定ID的便签
                 count = db.delete(TABLE.NOTE,
                         NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
                 break;
             case URI_DATA:
+                // 删除数据记录
                 count = db.delete(TABLE.DATA, selection, selectionArgs);
                 deleteData = true;
                 break;
             case URI_DATA_ITEM:
+                // 获取数据记录ID
                 id = uri.getPathSegments().get(1);
+                // 删除指定ID的数据记录
                 count = db.delete(TABLE.DATA,
                         DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
                 deleteData = true;
                 break;
             default:
+                // 未知URI，抛出异常
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
         if (count > 0) {
             if (deleteData) {
+                // 通知便签URI数据变化
                 getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
             }
+            // 通知当前URI数据变化
             getContext().getContentResolver().notifyChange(uri, null);
         }
         return count;
     }
 
+    /**
+     * 处理更新请求，根据不同的URI匹配码更新相应表中的数据，并增加便签版本号
+     *
+     * @param uri           请求的URI
+     * @param values        要更新的数据
+     * @param selection     更新条件
+     * @param selectionArgs 更新条件的参数
+     * @return 更新的数据行数
+     */
     @Override
     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
         int count = 0;
         String id = null;
+        // 获取可写数据库
         SQLiteDatabase db = mHelper.getWritableDatabase();
         boolean updateData = false;
         switch (mMatcher.match(uri)) {
             case URI_NOTE:
+                // 增加便签版本号
                 increaseNoteVersion(-1, selection, selectionArgs);
+                // 更新便签数据
                 count = db.update(TABLE.NOTE, values, selection, selectionArgs);
                 break;
             case URI_NOTE_ITEM:
+                // 获取便签ID
                 id = uri.getPathSegments().get(1);
+                // 增加指定ID便签的版本号
                 increaseNoteVersion(Long.valueOf(id), selection, selectionArgs);
+                // 更新指定ID的便签
                 count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id
                         + parseSelection(selection), selectionArgs);
                 break;
             case URI_DATA:
+                // 更新数据记录
                 count = db.update(TABLE.DATA, values, selection, selectionArgs);
                 updateData = true;
                 break;
             case URI_DATA_ITEM:
+                // 获取数据记录ID
                 id = uri.getPathSegments().get(1);
+                // 更新指定ID的数据记录
                 count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
                         + parseSelection(selection), selectionArgs);
                 updateData = true;
                 break;
             default:
+                // 未知URI，抛出异常
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
 
         if (count > 0) {
             if (updateData) {
+                // 通知便签URI数据变化
                 getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
             }
+            // 通知当前URI数据变化
             getContext().getContentResolver().notifyChange(uri, null);
         }
         return count;
     }
 
+    /**
+     * 解析查询条件，添加额外的条件
+     *
+     * @param selection 查询条件
+     * @return 解析后的查询条件
+     */
     private String parseSelection(String selection) {
         return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
     }
 
+    /**
+     * 增加便签的版本号，根据ID和查询条件更新便签的版本号
+     *
+     * @param id            便签ID
+     * @param selection     查询条件
+     * @param selectionArgs 查询条件的参数
+     */
     private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
         StringBuilder sql = new StringBuilder(120);
         sql.append("UPDATE ");
@@ -293,13 +397,19 @@ public class NotesProvider extends ContentProvider {
             sql.append(selectString);
         }
 
+        // 执行更新版本号的SQL语句
         mHelper.getWritableDatabase().execSQL(sql.toString());
     }
 
+    /**
+     * 获取URI对应的MIME类型，目前未实现
+     *
+     * @param uri 请求的URI
+     * @return MIME类型
+     */
     @Override
     public String getType(Uri uri) {
         // TODO Auto-generated method stub
         return null;
     }
-
+}
-}

java/net/micode/notes/model/Note.java

@@ -15,6 +15,7 @@
  */
 
 package net.micode.notes.model;
+
 import android.content.ContentProviderOperation;
 import android.content.ContentProviderResult;
 import android.content.ContentUris;
@@ -33,114 +34,184 @@ import net.micode.notes.data.Notes.TextNote;
 
 import java.util.ArrayList;
 
-
+/**
+ * Note 类用于管理便签的具体数据，包括便签的创建、更新和同步等操作。
+ */
 public class Note {
+    // 用于存储便签差异值的 ContentValues 对象
     private ContentValues mNoteDiffValues;
+    // 便签数据对象，用于管理便签的文本数据和通话数据
     private NoteData mNoteData;
+    // 日志标签，用于在日志中标识该类的信息
     private static final String TAG = "Note";
+
     /**
-     * Create a new note id for adding a new note to databases
+     * 创建一个新的便签 ID 并将新便签添加到数据库中。
+     * @param context 上下文对象
+     * @param folderId 便签所属文件夹的 ID
+     * @return 新创建的便签 ID
      */
     public static synchronized long getNewNoteId(Context context, long folderId) {
-        // Create a new note in the database
+        // 创建一个新的 ContentValues 对象，用于存储便签的初始信息
         ContentValues values = new ContentValues();
+        // 获取当前时间作为便签的创建时间和修改时间
         long createdTime = System.currentTimeMillis();
         values.put(NoteColumns.CREATED_DATE, createdTime);
         values.put(NoteColumns.MODIFIED_DATE, createdTime);
+        // 设置便签的类型为普通便签
         values.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
+        // 标记便签为本地修改
         values.put(NoteColumns.LOCAL_MODIFIED, 1);
+        // 设置便签所属文件夹的 ID
         values.put(NoteColumns.PARENT_ID, folderId);
+        // 插入新的便签信息到数据库中
         Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values);
 
         long noteId = 0;
         try {
+            // 从返回的 Uri 中获取便签的 ID
             noteId = Long.valueOf(uri.getPathSegments().get(1));
         } catch (NumberFormatException e) {
+            // 若获取 ID 失败，记录错误日志
             Log.e(TAG, "Get note id error :" + e.toString());
             noteId = 0;
         }
         if (noteId == -1) {
+            // 若便签 ID 为 -1，抛出异常
             throw new IllegalStateException("Wrong note id:" + noteId);
         }
         return noteId;
     }
 
+    /**
+     * 构造函数，初始化便签的差异值和便签数据对象。
+     */
     public Note() {
         mNoteDiffValues = new ContentValues();
         mNoteData = new NoteData();
     }
 
+    /**
+     * 设置便签的属性值。
+     * @param key 属性名
+     * @param value 属性值
+     */
     public void setNoteValue(String key, String value) {
         mNoteDiffValues.put(key, value);
+        // 标记便签为本地修改
         mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
+        // 更新便签的修改时间
         mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
     }
 
+    /**
+     * 设置便签的文本数据。
+     * @param key 文本数据的属性名
+     * @param value 文本数据的属性值
+     */
     public void setTextData(String key, String value) {
         mNoteData.setTextData(key, value);
     }
 
+    /**
+     * 设置便签的文本数据 ID。
+     * @param id 文本数据的 ID
+     */
     public void setTextDataId(long id) {
         mNoteData.setTextDataId(id);
     }
 
+    /**
+     * 获取便签的文本数据 ID。
+     * @return 文本数据的 ID
+     */
     public long getTextDataId() {
         return mNoteData.mTextDataId;
     }
 
+    /**
+     * 设置便签的通话数据 ID。
+     * @param id 通话数据的 ID
+     */
     public void setCallDataId(long id) {
         mNoteData.setCallDataId(id);
     }
 
+    /**
+     * 设置便签的通话数据。
+     * @param key 通话数据的属性名
+     * @param value 通话数据的属性值
+     */
     public void setCallData(String key, String value) {
         mNoteData.setCallData(key, value);
     }
 
+    /**
+     * 判断便签是否被本地修改。
+     * @return 被修改返回 true，否则返回 false
+     */
     public boolean isLocalModified() {
         return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified();
     }
 
+    /**
+     * 同步便签信息到数据库中。
+     * @param context 上下文对象
+     * @param noteId 便签的 ID
+     * @return 同步成功返回 true，否则返回 false
+     */
     public boolean syncNote(Context context, long noteId) {
         if (noteId <= 0) {
+            // 若便签 ID 不合法，抛出异常
             throw new IllegalArgumentException("Wrong note id:" + noteId);
         }
 
         if (!isLocalModified()) {
+            // 若便签未被修改，直接返回 true
             return true;
         }
 
         /**
-         * In theory, once data changed, the note should be updated on {@link NoteColumns#LOCAL_MODIFIED} and
+         * 理论上，一旦数据发生变化，便签的 LOCAL_MODIFIED 和 MODIFIED_DATE 应该更新。
-         * {@link NoteColumns#MODIFIED_DATE}. For data safety, though update note fails, we also update the
+         * 为了数据安全，即使更新便签失败，也会更新便签的数据信息。
-         * note data info
          */
         if (context.getContentResolver().update(
                 ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), mNoteDiffValues, null,
                 null) == 0) {
+            // 若更新便签信息失败，记录错误日志
             Log.e(TAG, "Update note error, should not happen");
-            // Do not return, fall through
+            // 不返回，继续执行后续操作
         }
+        // 清空便签的差异值
         mNoteDiffValues.clear();
 
         if (mNoteData.isLocalModified()
                 && (mNoteData.pushIntoContentResolver(context, noteId) == null)) {
+            // 若便签数据被修改且同步失败，返回 false
             return false;
         }
 
         return true;
     }
 
+    /**
+     * 内部类，用于管理便签的数据，包括文本数据和通话数据。
+     */
     private class NoteData {
+        // 文本数据的 ID
         private long mTextDataId;
-
+        // 用于存储文本数据的 ContentValues 对象
         private ContentValues mTextDataValues;
-
+        // 通话数据的 ID
         private long mCallDataId;
-
+        // 用于存储通话数据的 ContentValues 对象
         private ContentValues mCallDataValues;
-
+        // 日志标签，用于在日志中标识该类的信息
         private static final String TAG = "NoteData";
 
+        /**
+         * 构造函数，初始化文本数据和通话数据的 ContentValues 对象。
+         */
         public NoteData() {
             mTextDataValues = new ContentValues();
             mCallDataValues = new ContentValues();
@@ -148,101 +219,153 @@ public class Note {
             mCallDataId = 0;
         }
 
+        /**
+         * 判断便签数据是否被本地修改。
+         * @return 被修改返回 true，否则返回 false
+         */
         boolean isLocalModified() {
             return mTextDataValues.size() > 0 || mCallDataValues.size() > 0;
         }
 
+        /**
+         * 设置便签的文本数据 ID。
+         * @param id 文本数据的 ID
+         */
         void setTextDataId(long id) {
             if(id <= 0) {
+                // 若文本数据 ID 不合法，抛出异常
                 throw new IllegalArgumentException("Text data id should larger than 0");
             }
             mTextDataId = id;
         }
 
+        /**
+         * 设置便签的通话数据 ID。
+         * @param id 通话数据的 ID
+         */
         void setCallDataId(long id) {
             if (id <= 0) {
+                // 若通话数据 ID 不合法，抛出异常
                 throw new IllegalArgumentException("Call data id should larger than 0");
             }
             mCallDataId = id;
         }
 
+        /**
+         * 设置便签的通话数据。
+         * @param key 通话数据的属性名
+         * @param value 通话数据的属性值
+         */
         void setCallData(String key, String value) {
             mCallDataValues.put(key, value);
+            // 标记便签为本地修改
             mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
+            // 更新便签的修改时间
             mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
         }
 
+        /**
+         * 设置便签的文本数据。
+         * @param key 文本数据的属性名
+         * @param value 文本数据的属性值
+         */
         void setTextData(String key, String value) {
             mTextDataValues.put(key, value);
+            // 标记便签为本地修改
             mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
+            // 更新便签的修改时间
             mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
         }
 
+        /**
+         * 将便签数据推送到内容解析器中。
+         * @param context 上下文对象
+         * @param noteId 便签的 ID
+         * @return 操作成功返回 Uri，否则返回 null
+         */
         Uri pushIntoContentResolver(Context context, long noteId) {
             /**
-             * Check for safety
+             * 安全检查
              */
             if (noteId <= 0) {
+                // 若便签 ID 不合法，抛出异常
                 throw new IllegalArgumentException("Wrong note id:" + noteId);
             }
 
+            // 创建一个用于批量操作的 ContentProviderOperation 列表
             ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
+            // ContentProviderOperation 构建器
             ContentProviderOperation.Builder builder = null;
 
             if(mTextDataValues.size() > 0) {
+                // 设置文本数据所属的便签 ID
                 mTextDataValues.put(DataColumns.NOTE_ID, noteId);
                 if (mTextDataId == 0) {
+                    // 若文本数据 ID 为 0，插入新的文本数据
                     mTextDataValues.put(DataColumns.MIME_TYPE, TextNote.CONTENT_ITEM_TYPE);
                     Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
                             mTextDataValues);
                     try {
+                        // 获取插入的文本数据的 ID
                         setTextDataId(Long.valueOf(uri.getPathSegments().get(1)));
                     } catch (NumberFormatException e) {
+                        // 若插入失败，记录错误日志并清空文本数据
                         Log.e(TAG, "Insert new text data fail with noteId" + noteId);
                         mTextDataValues.clear();
                         return null;
                     }
                 } else {
+                    // 若文本数据 ID 不为 0，更新文本数据
                     builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
                             Notes.CONTENT_DATA_URI, mTextDataId));
                     builder.withValues(mTextDataValues);
                     operationList.add(builder.build());
                 }
+                // 清空文本数据
                 mTextDataValues.clear();
             }
 
             if(mCallDataValues.size() > 0) {
+                // 设置通话数据所属的便签 ID
                 mCallDataValues.put(DataColumns.NOTE_ID, noteId);
                 if (mCallDataId == 0) {
+                    // 若通话数据 ID 为 0，插入新的通话数据
                     mCallDataValues.put(DataColumns.MIME_TYPE, CallNote.CONTENT_ITEM_TYPE);
                     Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
                             mCallDataValues);
                     try {
+                        // 获取插入的通话数据的 ID
                         setCallDataId(Long.valueOf(uri.getPathSegments().get(1)));
                     } catch (NumberFormatException e) {
+                        // 若插入失败，记录错误日志并清空通话数据
                         Log.e(TAG, "Insert new call data fail with noteId" + noteId);
                         mCallDataValues.clear();
                         return null;
                     }
                 } else {
+                    // 若通话数据 ID 不为 0，更新通话数据
                     builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
                             Notes.CONTENT_DATA_URI, mCallDataId));
                     builder.withValues(mCallDataValues);
                     operationList.add(builder.build());
                 }
+                // 清空通话数据
                 mCallDataValues.clear();
             }
 
             if (operationList.size() > 0) {
                 try {
+                    // 执行批量操作
                     ContentProviderResult[] results = context.getContentResolver().applyBatch(
                             Notes.AUTHORITY, operationList);
                     return (results == null || results.length == 0 || results[0] == null) ? null
                             : ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId);
                 } catch (RemoteException e) {
+                    // 若操作失败，记录错误日志
                     Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
                     return null;
                 } catch (OperationApplicationException e) {
+                    // 若操作失败，记录错误日志
                     Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
                     return null;
                 }
@@ -250,4 +373,4 @@ public class Note {
             return null;
         }
     }
-}
+}

java/net/micode/notes/model/WorkingNote.java

@@ -31,37 +31,40 @@ import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.data.Notes.TextNote;
 import net.micode.notes.tool.ResourceParser.NoteBgResources;
 
-
+/**
+ * WorkingNote 类用于管理便签的操作，包括便签的创建、加载、保存等操作。
+ */
 public class WorkingNote {
-    // Note for the working note
+    // 便签对象，用于管理便签的具体数据
     private Note mNote;
-    // Note Id
+    // 便签的 ID
     private long mNoteId;
-    // Note content
+    // 便签的内容
     private String mContent;
-    // Note mode
+    // 便签的模式
     private int mMode;
-
+    // 便签的提醒日期
     private long mAlertDate;
-
+    // 便签的修改日期
     private long mModifiedDate;
-
+    // 便签的背景颜色 ID
     private int mBgColorId;
-
+    // 便签小部件的 ID
     private int mWidgetId;
-
+    // 便签小部件的类型
     private int mWidgetType;
-
+    // 便签所属文件夹的 ID
     private long mFolderId;
-
+    // 上下文对象，用于访问系统服务和资源
     private Context mContext;
-
+    // 日志标签，用于在日志中标识该类的信息
     private static final String TAG = "WorkingNote";
-
+    // 标记便签是否被删除
     private boolean mIsDeleted;
-
+    // 便签设置更改监听器，用于监听便签设置的变化
     private NoteSettingChangedListener mNoteSettingStatusListener;
 
+    // 用于查询便签数据的投影，指定需要查询的列
     public static final String[] DATA_PROJECTION = new String[] {
             DataColumns.ID,
             DataColumns.CONTENT,
@@ -72,6 +75,7 @@ public class WorkingNote {
             DataColumns.DATA4,
     };
 
+    // 用于查询便签信息的投影，指定需要查询的列
     public static final String[] NOTE_PROJECTION = new String[] {
             NoteColumns.PARENT_ID,
             NoteColumns.ALERTED_DATE,
@@ -81,27 +85,32 @@ public class WorkingNote {
             NoteColumns.MODIFIED_DATE
     };
 
+    // DATA_PROJECTION 中 ID 列的索引
     private static final int DATA_ID_COLUMN = 0;
-
+    // DATA_PROJECTION 中内容列的索引
     private static final int DATA_CONTENT_COLUMN = 1;
-
+    // DATA_PROJECTION 中 MIME 类型列的索引
     private static final int DATA_MIME_TYPE_COLUMN = 2;
-
+    // DATA_PROJECTION 中模式列的索引
     private static final int DATA_MODE_COLUMN = 3;
-
+    // NOTE_PROJECTION 中父文件夹 ID 列的索引
     private static final int NOTE_PARENT_ID_COLUMN = 0;
-
+    // NOTE_PROJECTION 中提醒日期列的索引
     private static final int NOTE_ALERTED_DATE_COLUMN = 1;
-
+    // NOTE_PROJECTION 中背景颜色 ID 列的索引
     private static final int NOTE_BG_COLOR_ID_COLUMN = 2;
-
+    // NOTE_PROJECTION 中小部件 ID 列的索引
     private static final int NOTE_WIDGET_ID_COLUMN = 3;
-
+    // NOTE_PROJECTION 中小部件类型列的索引
     private static final int NOTE_WIDGET_TYPE_COLUMN = 4;
-
+    // NOTE_PROJECTION 中修改日期列的索引
     private static final int NOTE_MODIFIED_DATE_COLUMN = 5;
 
-    // New note construct
+    /**
+     * 构造函数，用于创建一个新的便签对象。
+     * @param context 上下文对象
+     * @param folderId 便签所属文件夹的 ID
+     */
     private WorkingNote(Context context, long folderId) {
         mContext = context;
         mAlertDate = 0;
@@ -114,7 +123,12 @@ public class WorkingNote {
         mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
     }
 
-    // Existing note construct
+    /**
+     * 构造函数，用于加载一个已存在的便签对象。
+     * @param context 上下文对象
+     * @param noteId 便签的 ID
+     * @param folderId 便签所属文件夹的 ID
+     */
     private WorkingNote(Context context, long noteId, long folderId) {
         mContext = context;
         mNoteId = noteId;
@@ -124,29 +138,45 @@ public class WorkingNote {
         loadNote();
     }
 
+    /**
+     * 加载便签的信息，包括便签的基本信息和便签的数据。
+     */
     private void loadNote() {
+        // 查询便签的基本信息
         Cursor cursor = mContext.getContentResolver().query(
                 ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mNoteId), NOTE_PROJECTION, null,
                 null, null);
 
         if (cursor != null) {
             if (cursor.moveToFirst()) {
+                // 获取便签所属文件夹的 ID
                 mFolderId = cursor.getLong(NOTE_PARENT_ID_COLUMN);
+                // 获取便签的背景颜色 ID
                 mBgColorId = cursor.getInt(NOTE_BG_COLOR_ID_COLUMN);
+                // 获取便签小部件的 ID
                 mWidgetId = cursor.getInt(NOTE_WIDGET_ID_COLUMN);
+                // 获取便签小部件的类型
                 mWidgetType = cursor.getInt(NOTE_WIDGET_TYPE_COLUMN);
+                // 获取便签的提醒日期
                 mAlertDate = cursor.getLong(NOTE_ALERTED_DATE_COLUMN);
+                // 获取便签的修改日期
                 mModifiedDate = cursor.getLong(NOTE_MODIFIED_DATE_COLUMN);
             }
             cursor.close();
         } else {
+            // 若未查询到便签信息，记录错误日志并抛出异常
             Log.e(TAG, "No note with id:" + mNoteId);
             throw new IllegalArgumentException("Unable to find note with id " + mNoteId);
         }
+        // 加载便签的数据
         loadNoteData();
     }
 
+    /**
+     * 加载便签的数据，包括便签的内容和模式等信息。
+     */
     private void loadNoteData() {
+        // 查询便签的数据
         Cursor cursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, DATA_PROJECTION,
                 DataColumns.NOTE_ID + "=?", new String[] {
                     String.valueOf(mNoteId)
@@ -155,25 +185,40 @@ public class WorkingNote {
         if (cursor != null) {
             if (cursor.moveToFirst()) {
                 do {
+                    // 获取便签数据的 MIME 类型
                     String type = cursor.getString(DATA_MIME_TYPE_COLUMN);
                     if (DataConstants.NOTE.equals(type)) {
+                        // 若为文本便签类型，获取便签的内容和模式
                         mContent = cursor.getString(DATA_CONTENT_COLUMN);
                         mMode = cursor.getInt(DATA_MODE_COLUMN);
+                        // 设置文本数据的 ID
                         mNote.setTextDataId(cursor.getLong(DATA_ID_COLUMN));
                     } else if (DataConstants.CALL_NOTE.equals(type)) {
+                        // 若为通话便签类型，设置通话数据的 ID
                         mNote.setCallDataId(cursor.getLong(DATA_ID_COLUMN));
                     } else {
+                        // 若为其他类型，记录日志
                         Log.d(TAG, "Wrong note type with type:" + type);
                     }
                 } while (cursor.moveToNext());
             }
             cursor.close();
         } else {
+            // 若未查询到便签数据，记录错误日志并抛出异常
             Log.e(TAG, "No data with id:" + mNoteId);
             throw new IllegalArgumentException("Unable to find note's data with id " + mNoteId);
         }
     }
 
+    /**
+     * 创建一个空的便签对象。
+     * @param context 上下文对象
+     * @param folderId 便签所属文件夹的 ID
+     * @param widgetId 便签小部件的 ID
+     * @param widgetType 便签小部件的类型
+     * @param defaultBgColorId 便签的默认背景颜色 ID
+     * @return 新创建的便签对象
+     */
     public static WorkingNote createEmptyNote(Context context, long folderId, int widgetId,
             int widgetType, int defaultBgColorId) {
         WorkingNote note = new WorkingNote(context, folderId);
@@ -183,23 +228,35 @@ public class WorkingNote {
         return note;
     }
 
+    /**
+     * 加载一个已存在的便签对象。
+     * @param context 上下文对象
+     * @param id 便签的 ID
+     * @return 加载的便签对象
+     */
     public static WorkingNote load(Context context, long id) {
         return new WorkingNote(context, id, 0);
     }
 
+    /**
+     * 保存便签的信息。
+     * @return 保存成功返回 true，否则返回 false
+     */
     public synchronized boolean saveNote() {
         if (isWorthSaving()) {
             if (!existInDatabase()) {
+                // 若便签不存在于数据库中，创建新的便签 ID
                 if ((mNoteId = Note.getNewNoteId(mContext, mFolderId)) == 0) {
+                    // 若创建失败，记录错误日志并返回 false
                     Log.e(TAG, "Create new note fail with id:" + mNoteId);
                     return false;
                 }
             }
-
+            // 同步便签信息到数据库
             mNote.syncNote(mContext, mNoteId);
 
             /**
-             * Update widget content if there exist any widget of this note
+             * 若存在便签的小部件，更新小部件的内容
              */
             if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
                     && mWidgetType != Notes.TYPE_WIDGET_INVALIDE
@@ -212,10 +269,18 @@ public class WorkingNote {
         }
     }
 
+    /**
+     * 判断便签是否存在于数据库中。
+     * @return 存在返回 true，否则返回 false
+     */
     public boolean existInDatabase() {
         return mNoteId > 0;
     }
 
+    /**
+     * 判断便签是否值得保存。
+     * @return 值得保存返回 true，否则返回 false
+     */
     private boolean isWorthSaving() {
         if (mIsDeleted || (!existInDatabase() && TextUtils.isEmpty(mContent))
                 || (existInDatabase() && !mNote.isLocalModified())) {
@@ -225,10 +290,19 @@ public class WorkingNote {
         }
     }
 
+    /**
+     * 设置便签设置更改监听器。
+     * @param l 监听器对象
+     */
     public void setOnSettingStatusChangedListener(NoteSettingChangedListener l) {
         mNoteSettingStatusListener = l;
     }
 
+    /**
+     * 设置便签的提醒日期。
+     * @param date 提醒日期
+     * @param set 是否设置提醒
+     */
     public void setAlertDate(long date, boolean set) {
         if (date != mAlertDate) {
             mAlertDate = date;
@@ -239,6 +313,10 @@ public class WorkingNote {
         }
     }
 
+    /**
+     * 标记便签是否被删除。
+     * @param mark 是否删除
+     */
     public void markDeleted(boolean mark) {
         mIsDeleted = mark;
         if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
@@ -247,6 +325,10 @@ public class WorkingNote {
         }
     }
 
+    /**
+     * 设置便签的背景颜色 ID。
+     * @param id 背景颜色 ID
+     */
     public void setBgColorId(int id) {
         if (id != mBgColorId) {
             mBgColorId = id;
@@ -257,6 +339,10 @@ public class WorkingNote {
         }
     }
 
+    /**
+     * 设置便签的清单模式。
+     * @param mode 清单模式
+     */
     public void setCheckListMode(int mode) {
         if (mMode != mode) {
             if (mNoteSettingStatusListener != null) {
@@ -267,6 +353,10 @@ public class WorkingNote {
         }
     }
 
+    /**
+     * 设置便签小部件的类型。
+     * @param type 小部件类型
+     */
     public void setWidgetType(int type) {
         if (type != mWidgetType) {
             mWidgetType = type;
@@ -274,6 +364,10 @@ public class WorkingNote {
         }
     }
 
+    /**
+     * 设置便签小部件的 ID。
+     * @param id 小部件 ID
+     */
     public void setWidgetId(int id) {
         if (id != mWidgetId) {
             mWidgetId = id;
@@ -281,6 +375,10 @@ public class WorkingNote {
         }
     }
 
+    /**
+     * 设置便签的工作文本。
+     * @param text 工作文本
+     */
     public void setWorkingText(String text) {
         if (!TextUtils.equals(mContent, text)) {
             mContent = text;
@@ -288,81 +386,139 @@ public class WorkingNote {
         }
     }
 
+    /**
+     * 将便签转换为通话便签。
+     * @param phoneNumber 电话号码
+     * @param callDate 通话日期
+     */
     public void convertToCallNote(String phoneNumber, long callDate) {
         mNote.setCallData(CallNote.CALL_DATE, String.valueOf(callDate));
         mNote.setCallData(CallNote.PHONE_NUMBER, phoneNumber);
         mNote.setNoteValue(NoteColumns.PARENT_ID, String.valueOf(Notes.ID_CALL_RECORD_FOLDER));
     }
 
+    /**
+     * 判断便签是否设置了提醒。
+     * @return 设置了提醒返回 true，否则返回 false
+     */
     public boolean hasClockAlert() {
         return (mAlertDate > 0 ? true : false);
     }
 
+    /**
+     * 获取便签的内容。
+     * @return 便签的内容
+     */
     public String getContent() {
         return mContent;
     }
 
+    /**
+     * 获取便签的提醒日期。
+     * @return 便签的提醒日期
+     */
     public long getAlertDate() {
         return mAlertDate;
     }
 
+    /**
+     * 获取便签的修改日期。
+     * @return 便签的修改日期
+     */
     public long getModifiedDate() {
         return mModifiedDate;
     }
 
+    /**
+     * 获取便签背景的资源 ID。
+     * @return 便签背景的资源 ID
+     */
     public int getBgColorResId() {
         return NoteBgResources.getNoteBgResource(mBgColorId);
     }
 
+    /**
+     * 获取便签的背景颜色 ID。
+     * @return 便签的背景颜色 ID
+     */
     public int getBgColorId() {
         return mBgColorId;
     }
 
+    /**
+     * 获取便签标题背景的资源 ID。
+     * @return 便签标题背景的资源 ID
+     */
     public int getTitleBgResId() {
         return NoteBgResources.getNoteTitleBgResource(mBgColorId);
     }
 
+    /**
+     * 获取便签的清单模式。
+     * @return 便签的清单模式
+     */
     public int getCheckListMode() {
         return mMode;
     }
 
+    /**
+     * 获取便签的 ID。
+     * @return 便签的 ID
+     */
     public long getNoteId() {
         return mNoteId;
     }
 
+    /**
+     * 获取便签所属文件夹的 ID。
+     * @return 便签所属文件夹的 ID
+     */
     public long getFolderId() {
         return mFolderId;
     }
 
+    /**
+     * 获取便签小部件的 ID。
+     * @return 便签小部件的 ID
+     */
     public int getWidgetId() {
         return mWidgetId;
     }
 
+    /**
+     * 获取便签小部件的类型。
+     * @return 便签小部件的类型
+     */
     public int getWidgetType() {
         return mWidgetType;
     }
 
+    /**
+     * 便签设置更改监听器接口，用于监听便签设置的变化。
+     */
     public interface NoteSettingChangedListener {
         /**
-         * Called when the background color of current note has just changed
+         * 当便签的背景颜色发生变化时调用。
          */
         void onBackgroundColorChanged();
 
         /**
-         * Called when user set clock
+         * 当用户设置提醒时调用。
+         * @param date 提醒日期
+         * @param set 是否设置提醒
          */
         void onClockAlertChanged(long date, boolean set);
 
         /**
-         * Call when user create note from widget
+         * 当用户从小部件创建便签时调用。
          */
         void onWidgetChanged();
 
         /**
-         * Call when switch between check list mode and normal mode
+         * 当便签在清单模式和普通模式之间切换时调用。
-         * @param oldMode is previous mode before change
+         * @param oldMode 切换前的模式
-         * @param newMode is new mode
+         * @param newMode 切换后的模式
          */
         void onCheckListModeChanged(int oldMode, int newMode);
     }
-}
+}

java/net/micode/notes/tool/BackupUtils.java

@@ -35,12 +35,13 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.PrintStream;
 
-
+// 该类用于实现笔记数据的备份功能
 public class BackupUtils {
     private static final String TAG = "BackupUtils";
-    // Singleton stuff
+    // 单例实例
     private static BackupUtils sInstance;
 
+    // 获取单例实例的方法
     public static synchronized BackupUtils getInstance(Context context) {
         if (sInstance == null) {
             sInstance = new BackupUtils(context);
@@ -48,44 +49,44 @@ public class BackupUtils {
         return sInstance;
     }
 
-    /**
+    // 定义备份或恢复的状态常量
-     * Following states are signs to represents backup or restore
-     * status
-     */
-    // Currently, the sdcard is not mounted
     public static final int STATE_SD_CARD_UNMOUONTED           = 0;
-    // The backup file not exist
     public static final int STATE_BACKUP_FILE_NOT_EXIST        = 1;
-    // The data is not well formated, may be changed by other programs
     public static final int STATE_DATA_DESTROIED               = 2;
-    // Some run-time exception which causes restore or backup fails
     public static final int STATE_SYSTEM_ERROR                 = 3;
-    // Backup or restore success
     public static final int STATE_SUCCESS                      = 4;
 
+    // 文本导出对象
     private TextExport mTextExport;
 
+    // 构造函数
     private BackupUtils(Context context) {
         mTextExport = new TextExport(context);
     }
 
+    // 检查外部存储是否可用的方法
     private static boolean externalStorageAvailable() {
         return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
     }
 
+    // 导出笔记数据为文本的方法
     public int exportToText() {
         return mTextExport.exportToText();
     }
 
+    // 获取导出的文本文件名的方法
     public String getExportedTextFileName() {
         return mTextExport.mFileName;
     }
 
+    // 获取导出的文本文件目录的方法
     public String getExportedTextFileDir() {
         return mTextExport.mFileDirectory;
     }
 
+    // 内部类，用于实现文本导出功能
     private static class TextExport {
+        // 笔记查询的投影列
         private static final String[] NOTE_PROJECTION = {
                 NoteColumns.ID,
                 NoteColumns.MODIFIED_DATE,
@@ -93,12 +94,16 @@ public class BackupUtils {
                 NoteColumns.TYPE
         };
 
+        // 笔记 ID 列的索引
         private static final int NOTE_COLUMN_ID = 0;
 
+        // 笔记修改日期列的索引
         private static final int NOTE_COLUMN_MODIFIED_DATE = 1;
 
+        // 笔记摘要列的索引
         private static final int NOTE_COLUMN_SNIPPET = 2;
 
+        // 数据查询的投影列
         private static final String[] DATA_PROJECTION = {
                 DataColumns.CONTENT,
                 DataColumns.MIME_TYPE,
@@ -108,39 +113,51 @@ public class BackupUtils {
                 DataColumns.DATA4,
         };
 
+        // 数据内容列的索引
         private static final int DATA_COLUMN_CONTENT = 0;
 
+        // 数据 MIME 类型列的索引
         private static final int DATA_COLUMN_MIME_TYPE = 1;
 
+        // 数据通话日期列的索引
         private static final int DATA_COLUMN_CALL_DATE = 2;
 
+        // 数据电话号码列的索引
         private static final int DATA_COLUMN_PHONE_NUMBER = 4;
 
+        // 文本格式数组
         private final String [] TEXT_FORMAT;
+        // 文件夹名称格式的索引
         private static final int FORMAT_FOLDER_NAME          = 0;
+        // 笔记日期格式的索引
         private static final int FORMAT_NOTE_DATE            = 1;
+        // 笔记内容格式的索引
         private static final int FORMAT_NOTE_CONTENT         = 2;
 
+        // 上下文对象
         private Context mContext;
+        // 导出的文件名
         private String mFileName;
+        // 导出的文件目录
         private String mFileDirectory;
 
+        // 构造函数
         public TextExport(Context context) {
+            // 获取文本格式数组
             TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note);
             mContext = context;
             mFileName = "";
             mFileDirectory = "";
         }
 
+        // 根据索引获取文本格式的方法
         private String getFormat(int id) {
             return TEXT_FORMAT[id];
         }
 
-        /**
+        // 将指定文件夹导出为文本的方法
-         * Export the folder identified by folder id to text
-         */
         private void exportFolderToText(String folderId, PrintStream ps) {
-            // Query notes belong to this folder
+            // 查询属于该文件夹的笔记
             Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI,
                     NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] {
                         folderId
@@ -149,23 +166,23 @@ public class BackupUtils {
             if (notesCursor != null) {
                 if (notesCursor.moveToFirst()) {
                     do {
-                        // Print note's last modified date
+                        // 打印笔记的最后修改日期
                         ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
                                 mContext.getString(R.string.format_datetime_mdhm),
                                 notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
-                        // Query data belong to this note
+                        // 查询属于该笔记的数据
                         String noteId = notesCursor.getString(NOTE_COLUMN_ID);
                         exportNoteToText(noteId, ps);
                     } while (notesCursor.moveToNext());
                 }
+                // 关闭游标
                 notesCursor.close();
             }
         }
 
-        /**
+        // 将指定笔记导出为文本的方法
-         * Export note identified by id to a print stream
-         */
         private void exportNoteToText(String noteId, PrintStream ps) {
+            // 查询属于该笔记的数据
             Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI,
                     DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[] {
                         noteId
@@ -174,9 +191,10 @@ public class BackupUtils {
             if (dataCursor != null) {
                 if (dataCursor.moveToFirst()) {
                     do {
+                        // 获取数据的 MIME 类型
                         String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE);
                         if (DataConstants.CALL_NOTE.equals(mimeType)) {
-                            // Print phone number
+                            // 打印电话号码
                             String phoneNumber = dataCursor.getString(DATA_COLUMN_PHONE_NUMBER);
                             long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE);
                             String location = dataCursor.getString(DATA_COLUMN_CONTENT);
@@ -185,16 +203,17 @@ public class BackupUtils {
                                 ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
                                         phoneNumber));
                             }
-                            // Print call date
+                            // 打印通话日期
                             ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), DateFormat
                                     .format(mContext.getString(R.string.format_datetime_mdhm),
                                             callDate)));
-                            // Print call attachment location
+                            // 打印通话附件位置
                             if (!TextUtils.isEmpty(location)) {
                                 ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
                                         location));
                             }
                         } else if (DataConstants.NOTE.equals(mimeType)) {
+                            // 打印笔记内容
                             String content = dataCursor.getString(DATA_COLUMN_CONTENT);
                             if (!TextUtils.isEmpty(content)) {
                                 ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
@@ -203,33 +222,35 @@ public class BackupUtils {
                         }
                     } while (dataCursor.moveToNext());
                 }
+                // 关闭游标
                 dataCursor.close();
             }
-            // print a line separator between note
+            // 打印笔记之间的分隔线
             try {
                 ps.write(new byte[] {
                         Character.LINE_SEPARATOR, Character.LETTER_NUMBER
                 });
             } catch (IOException e) {
+                // 处理 IO 异常
                 Log.e(TAG, e.toString());
             }
         }
 
-        /**
+        // 导出所有笔记数据为文本的方法
-         * Note will be exported as text which is user readable
-         */
         public int exportToText() {
+            // 检查外部存储是否可用
             if (!externalStorageAvailable()) {
                 Log.d(TAG, "Media was not mounted");
                 return STATE_SD_CARD_UNMOUONTED;
             }
 
+            // 获取打印流
             PrintStream ps = getExportToTextPrintStream();
             if (ps == null) {
                 Log.e(TAG, "get print stream error");
                 return STATE_SYSTEM_ERROR;
             }
-            // First export folder and its notes
+            // 首先导出文件夹及其笔记
             Cursor folderCursor = mContext.getContentResolver().query(
                     Notes.CONTENT_NOTE_URI,
                     NOTE_PROJECTION,
@@ -240,7 +261,7 @@ public class BackupUtils {
             if (folderCursor != null) {
                 if (folderCursor.moveToFirst()) {
                     do {
-                        // Print folder's name
+                        // 打印文件夹名称
                         String folderName = "";
                         if(folderCursor.getLong(NOTE_COLUMN_ID) == Notes.ID_CALL_RECORD_FOLDER) {
                             folderName = mContext.getString(R.string.call_record_folder_name);
@@ -250,14 +271,17 @@ public class BackupUtils {
                         if (!TextUtils.isEmpty(folderName)) {
                             ps.println(String.format(getFormat(FORMAT_FOLDER_NAME), folderName));
                         }
+                        // 获取文件夹 ID
                         String folderId = folderCursor.getString(NOTE_COLUMN_ID);
+                        // 导出文件夹及其笔记
                         exportFolderToText(folderId, ps);
                     } while (folderCursor.moveToNext());
                 }
+                // 关闭游标
                 folderCursor.close();
             }
 
-            // Export notes in root's folder
+            // 导出根文件夹下的笔记
             Cursor noteCursor = mContext.getContentResolver().query(
                     Notes.CONTENT_NOTE_URI,
                     NOTE_PROJECTION,
@@ -267,41 +291,50 @@ public class BackupUtils {
             if (noteCursor != null) {
                 if (noteCursor.moveToFirst()) {
                     do {
+                        // 打印笔记的最后修改日期
                         ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
                                 mContext.getString(R.string.format_datetime_mdhm),
                                 noteCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
-                        // Query data belong to this note
+                        // 查询属于该笔记的数据
                         String noteId = noteCursor.getString(NOTE_COLUMN_ID);
+                        // 导出笔记数据
                         exportNoteToText(noteId, ps);
                     } while (noteCursor.moveToNext());
                 }
+                // 关闭游标
                 noteCursor.close();
             }
+            // 关闭打印流
             ps.close();
 
             return STATE_SUCCESS;
         }
 
-        /**
+        // 获取导出文本的打印流的方法
-         * Get a print stream pointed to the file {@generateExportedTextFile}
-         */
         private PrintStream getExportToTextPrintStream() {
+            // 生成存储导出数据的文件
             File file = generateFileMountedOnSDcard(mContext, R.string.file_path,
                     R.string.file_name_txt_format);
             if (file == null) {
                 Log.e(TAG, "create file to exported failed");
                 return null;
             }
+            // 获取文件名
             mFileName = file.getName();
+            // 获取文件目录
             mFileDirectory = mContext.getString(R.string.file_path);
             PrintStream ps = null;
             try {
+                // 创建文件输出流
                 FileOutputStream fos = new FileOutputStream(file);
+                // 创建打印流
                 ps = new PrintStream(fos);
             } catch (FileNotFoundException e) {
+                // 处理文件未找到异常
                 e.printStackTrace();
                 return null;
             } catch (NullPointerException e) {
+                // 处理空指针异常
                 e.printStackTrace();
                 return null;
             }
@@ -309,10 +342,9 @@ public class BackupUtils {
         }
     }
 
-    /**
+    // 生成存储导入数据的文本文件的方法
-     * Generate the text file to store imported data
-     */
     private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
+        // 构建文件路径
         StringBuilder sb = new StringBuilder();
         sb.append(Environment.getExternalStorageDirectory());
         sb.append(context.getString(filePathResId));
@@ -324,21 +356,23 @@ public class BackupUtils {
         File file = new File(sb.toString());
 
         try {
+            // 检查文件夹是否存在，不存在则创建
             if (!filedir.exists()) {
                 filedir.mkdir();
             }
+            // 检查文件是否存在，不存在则创建
             if (!file.exists()) {
                 file.createNewFile();
             }
             return file;
         } catch (SecurityException e) {
+            // 处理安全异常
             e.printStackTrace();
         } catch (IOException e) {
+            // 处理 IO 异常
             e.printStackTrace();
         }
 
         return null;
     }
-}
+}
-
-

java/net/micode/notes/tool/DataUtils.java

@@ -34,87 +34,112 @@ import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;
 import java.util.ArrayList;
 import java.util.HashSet;
 
-
+// 该类包含了一系列用于操作笔记数据的工具方法
 public class DataUtils {
     public static final String TAG = "DataUtils";
+
+    // 批量删除笔记的方法
     public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {
+        // 检查传入的 id 集合是否为 null
         if (ids == null) {
             Log.d(TAG, "the ids is null");
             return true;
         }
+        // 检查 id 集合是否为空
         if (ids.size() == 0) {
             Log.d(TAG, "no id is in the hashset");
             return true;
         }
 
+        // 创建一个用于批量操作的列表
         ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
+        // 遍历 id 集合
         for (long id : ids) {
+            // 检查是否为系统根文件夹，避免删除系统文件夹
             if(id == Notes.ID_ROOT_FOLDER) {
                 Log.e(TAG, "Don't delete system folder root");
                 continue;
             }
+            // 创建一个删除操作
             ContentProviderOperation.Builder builder = ContentProviderOperation
                     .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
+            // 将操作添加到列表中
             operationList.add(builder.build());
         }
         try {
+            // 执行批量操作
             ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
+            // 检查操作结果是否有效
             if (results == null || results.length == 0 || results[0] == null) {
                 Log.d(TAG, "delete notes failed, ids:" + ids.toString());
                 return false;
             }
             return true;
         } catch (RemoteException e) {
+            // 处理远程异常
             Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
         } catch (OperationApplicationException e) {
+            // 处理操作应用异常
             Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
         }
         return false;
     }
 
+    // 将单个笔记移动到指定文件夹的方法
     public static void moveNoteToFoler(ContentResolver resolver, long id, long srcFolderId, long desFolderId) {
+        // 创建一个 ContentValues 对象，用于存储要更新的字段和值
         ContentValues values = new ContentValues();
         values.put(NoteColumns.PARENT_ID, desFolderId);
         values.put(NoteColumns.ORIGIN_PARENT_ID, srcFolderId);
         values.put(NoteColumns.LOCAL_MODIFIED, 1);
+        // 执行更新操作
         resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null);
     }
 
+    // 批量将笔记移动到指定文件夹的方法
     public static boolean batchMoveToFolder(ContentResolver resolver, HashSet<Long> ids,
             long folderId) {
+        // 检查传入的 id 集合是否为 null
         if (ids == null) {
             Log.d(TAG, "the ids is null");
             return true;
         }
 
+        // 创建一个用于批量操作的列表
         ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
+        // 遍历 id 集合
         for (long id : ids) {
+            // 创建一个更新操作
             ContentProviderOperation.Builder builder = ContentProviderOperation
                     .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
             builder.withValue(NoteColumns.PARENT_ID, folderId);
             builder.withValue(NoteColumns.LOCAL_MODIFIED, 1);
+            // 将操作添加到列表中
             operationList.add(builder.build());
         }
 
         try {
+            // 执行批量操作
             ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
+            // 检查操作结果是否有效
             if (results == null || results.length == 0 || results[0] == null) {
                 Log.d(TAG, "delete notes failed, ids:" + ids.toString());
                 return false;
             }
             return true;
         } catch (RemoteException e) {
+            // 处理远程异常
             Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
         } catch (OperationApplicationException e) {
+            // 处理操作应用异常
             Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
         }
         return false;
     }
 
-    /**
+    // 获取用户文件夹数量的方法，排除系统文件夹
-     * Get the all folder count except system folders {@link Notes#TYPE_SYSTEM}}
-     */
     public static int getUserFolderCount(ContentResolver resolver) {
+        // 查询用户文件夹的数量
         Cursor cursor =resolver.query(Notes.CONTENT_NOTE_URI,
                 new String[] { "COUNT(*)" },
                 NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>?",
@@ -122,13 +147,17 @@ public class DataUtils {
                 null);
 
         int count = 0;
+        // 检查游标是否有效
         if(cursor != null) {
             if(cursor.moveToFirst()) {
                 try {
+                    // 获取文件夹数量
                     count = cursor.getInt(0);
                 } catch (IndexOutOfBoundsException e) {
+                    // 处理索引越界异常
                     Log.e(TAG, "get folder count failed:" + e.toString());
                 } finally {
+                    // 关闭游标
                     cursor.close();
                 }
             }
@@ -136,7 +165,9 @@ public class DataUtils {
         return count;
     }
 
+    // 检查笔记是否在数据库中可见的方法
     public static boolean visibleInNoteDatabase(ContentResolver resolver, long noteId, int type) {
+        // 查询笔记是否可见
         Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
                 null,
                 NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER,
@@ -144,60 +175,76 @@ public class DataUtils {
                 null);
 
         boolean exist = false;
+        // 检查游标是否有效
         if (cursor != null) {
             if (cursor.getCount() > 0) {
                 exist = true;
             }
+            // 关闭游标
             cursor.close();
         }
         return exist;
     }
 
+    // 检查笔记是否存在于数据库中的方法
     public static boolean existInNoteDatabase(ContentResolver resolver, long noteId) {
+        // 查询笔记是否存在
         Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
                 null, null, null, null);
 
         boolean exist = false;
+        // 检查游标是否有效
         if (cursor != null) {
             if (cursor.getCount() > 0) {
                 exist = true;
             }
+            // 关闭游标
             cursor.close();
         }
         return exist;
     }
 
+    // 检查数据是否存在于数据库中的方法
     public static boolean existInDataDatabase(ContentResolver resolver, long dataId) {
+        // 查询数据是否存在
         Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId),
                 null, null, null, null);
 
         boolean exist = false;
+        // 检查游标是否有效
         if (cursor != null) {
             if (cursor.getCount() > 0) {
                 exist = true;
             }
+            // 关闭游标
             cursor.close();
         }
         return exist;
     }
 
+    // 检查可见文件夹名称是否存在的方法
     public static boolean checkVisibleFolderName(ContentResolver resolver, String name) {
+        // 查询可见文件夹名称是否存在
         Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, null,
                 NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER +
                 " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER +
                 " AND " + NoteColumns.SNIPPET + "=?",
                 new String[] { name }, null);
         boolean exist = false;
+        // 检查游标是否有效
         if(cursor != null) {
             if(cursor.getCount() > 0) {
                 exist = true;
             }
+            // 关闭游标
             cursor.close();
         }
         return exist;
     }
 
+    // 获取指定文件夹下的笔记小部件信息的方法
     public static HashSet<AppWidgetAttribute> getFolderNoteWidget(ContentResolver resolver, long folderId) {
+        // 查询指定文件夹下的笔记小部件信息
         Cursor c = resolver.query(Notes.CONTENT_NOTE_URI,
                 new String[] { NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE },
                 NoteColumns.PARENT_ID + "=?",
@@ -205,26 +252,33 @@ public class DataUtils {
                 null);
 
         HashSet<AppWidgetAttribute> set = null;
+        // 检查游标是否有效
         if (c != null) {
             if (c.moveToFirst()) {
                 set = new HashSet<AppWidgetAttribute>();
                 do {
                     try {
+                        // 创建一个 AppWidgetAttribute 对象
                         AppWidgetAttribute widget = new AppWidgetAttribute();
                         widget.widgetId = c.getInt(0);
                         widget.widgetType = c.getInt(1);
+                        // 将对象添加到集合中
                         set.add(widget);
                     } catch (IndexOutOfBoundsException e) {
+                        // 处理索引越界异常
                         Log.e(TAG, e.toString());
                     }
                 } while (c.moveToNext());
             }
+            // 关闭游标
             c.close();
         }
         return set;
     }
 
+    // 根据笔记 ID 获取通话号码的方法
     public static String getCallNumberByNoteId(ContentResolver resolver, long noteId) {
+        // 查询通话号码
         Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
                 new String [] { CallNote.PHONE_NUMBER },
                 CallNote.NOTE_ID + "=? AND " + CallNote.MIME_TYPE + "=?",
@@ -233,17 +287,22 @@ public class DataUtils {
 
         if (cursor != null && cursor.moveToFirst()) {
             try {
+                // 获取通话号码
                 return cursor.getString(0);
             } catch (IndexOutOfBoundsException e) {
+                // 处理索引越界异常
                 Log.e(TAG, "Get call number fails " + e.toString());
             } finally {
+                // 关闭游标
                 cursor.close();
             }
         }
         return "";
     }
 
+    // 根据电话号码和通话日期获取笔记 ID 的方法
     public static long getNoteIdByPhoneNumberAndCallDate(ContentResolver resolver, String phoneNumber, long callDate) {
+        // 查询笔记 ID
         Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
                 new String [] { CallNote.NOTE_ID },
                 CallNote.CALL_DATE + "=? AND " + CallNote.MIME_TYPE + "=? AND PHONE_NUMBERS_EQUAL("
@@ -254,17 +313,22 @@ public class DataUtils {
         if (cursor != null) {
             if (cursor.moveToFirst()) {
                 try {
+                    // 获取笔记 ID
                     return cursor.getLong(0);
                 } catch (IndexOutOfBoundsException e) {
+                    // 处理索引越界异常
                     Log.e(TAG, "Get call note id fails " + e.toString());
                 }
             }
+            // 关闭游标
             cursor.close();
         }
         return 0;
     }
 
+    // 根据笔记 ID 获取摘要的方法
     public static String getSnippetById(ContentResolver resolver, long noteId) {
+        // 查询摘要
         Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI,
                 new String [] { NoteColumns.SNIPPET },
                 NoteColumns.ID + "=?",
@@ -274,22 +338,29 @@ public class DataUtils {
         if (cursor != null) {
             String snippet = "";
             if (cursor.moveToFirst()) {
+                // 获取摘要
                 snippet = cursor.getString(0);
             }
+            // 关闭游标
             cursor.close();
             return snippet;
         }
+        // 若未找到笔记，抛出异常
         throw new IllegalArgumentException("Note is not found with id: " + noteId);
     }
 
+    // 格式化摘要的方法
     public static String getFormattedSnippet(String snippet) {
         if (snippet != null) {
+            // 去除前后空格
             snippet = snippet.trim();
+            // 查找换行符的位置
             int index = snippet.indexOf('\n');
             if (index != -1) {
+                // 截取换行符之前的内容
                 snippet = snippet.substring(0, index);
             }
         }
         return snippet;
     }
-}
+}

java/net/micode/notes/tool/GTaskStringUtils.java

@@ -16,98 +16,63 @@
 
 package net.micode.notes.tool;
 
+// 该类定义了用于 Google 任务同步的 JSON 字段常量
 public class GTaskStringUtils {
 
+    // 定义 JSON 字段常量
     public final static String GTASK_JSON_ACTION_ID = "action_id";
-
     public final static String GTASK_JSON_ACTION_LIST = "action_list";
-
     public final static String GTASK_JSON_ACTION_TYPE = "action_type";
-
     public final static String GTASK_JSON_ACTION_TYPE_CREATE = "create";
-
     public final static String GTASK_JSON_ACTION_TYPE_GETALL = "get_all";
-
     public final static String GTASK_JSON_ACTION_TYPE_MOVE = "move";
-
     public final static String GTASK_JSON_ACTION_TYPE_UPDATE = "update";
-
     public final static String GTASK_JSON_CREATOR_ID = "creator_id";
-
     public final static String GTASK_JSON_CHILD_ENTITY = "child_entity";
-
     public final static String GTASK_JSON_CLIENT_VERSION = "client_version";
-
     public final static String GTASK_JSON_COMPLETED = "completed";
-
     public final static String GTASK_JSON_CURRENT_LIST_ID = "current_list_id";
-
     public final static String GTASK_JSON_DEFAULT_LIST_ID = "default_list_id";
-
     public final static String GTASK_JSON_DELETED = "deleted";
-
     public final static String GTASK_JSON_DEST_LIST = "dest_list";
-
     public final static String GTASK_JSON_DEST_PARENT = "dest_parent";
-
     public final static String GTASK_JSON_DEST_PARENT_TYPE = "dest_parent_type";
-
     public final static String GTASK_JSON_ENTITY_DELTA = "entity_delta";
-
     public final static String GTASK_JSON_ENTITY_TYPE = "entity_type";
-
     public final static String GTASK_JSON_GET_DELETED = "get_deleted";
-
     public final static String GTASK_JSON_ID = "id";
-
     public final static String GTASK_JSON_INDEX = "index";
-
     public final static String GTASK_JSON_LAST_MODIFIED = "last_modified";
-
     public final static String GTASK_JSON_LATEST_SYNC_POINT = "latest_sync_point";
-
     public final static String GTASK_JSON_LIST_ID = "list_id";
-
     public final static String GTASK_JSON_LISTS = "lists";
-
     public final static String GTASK_JSON_NAME = "name";
-
     public final static String GTASK_JSON_NEW_ID = "new_id";
-
     public final static String GTASK_JSON_NOTES = "notes";
-
     public final static String GTASK_JSON_PARENT_ID = "parent_id";
-
     public final static String GTASK_JSON_PRIOR_SIBLING_ID = "prior_sibling_id";
-
     public final static String GTASK_JSON_RESULTS = "results";
-
     public final static String GTASK_JSON_SOURCE_LIST = "source_list";
-
     public final static String GTASK_JSON_TASKS = "tasks";
-
     public final static String GTASK_JSON_TYPE = "type";
-
     public final static String GTASK_JSON_TYPE_GROUP = "GROUP";
-
     public final static String GTASK_JSON_TYPE_TASK = "TASK";
-
     public final static String GTASK_JSON_USER = "user";
 
+    // 定义小米便签文件夹前缀
     public final static String MIUI_FOLDER_PREFFIX = "[MIUI_Notes]";
-
+    // 定义默认文件夹名称
     public final static String FOLDER_DEFAULT = "Default";
-
+    // 定义通话笔记文件夹名称
     public final static String FOLDER_CALL_NOTE = "Call_Note";
-
+    // 定义元数据文件夹名称
     public final static String FOLDER_META = "METADATA";
-
+    // 定义元数据头部的 Google 任务 ID
     public final static String META_HEAD_GTASK_ID = "meta_gid";
-
+    // 定义元数据头部的笔记
     public final static String META_HEAD_NOTE = "meta_note";
-
+    // 定义元数据头部的数据
     public final static String META_HEAD_DATA = "meta_data";
-
+    // 定义元数据笔记名称
     public final static String META_NOTE_NAME = "[META INFO] DON'T UPDATE AND DELETE";
-
+}
-}

java/net/micode/notes/tool/ResourceParser.java

@@ -22,24 +22,31 @@ import android.preference.PreferenceManager;
 import net.micode.notes.R;
 import net.micode.notes.ui.NotesPreferenceActivity;
 
+// 该类用于解析和管理笔记的资源
 public class ResourceParser {
 
+    // 定义背景颜色常量
     public static final int YELLOW           = 0;
     public static final int BLUE             = 1;
     public static final int WHITE            = 2;
     public static final int GREEN            = 3;
     public static final int RED              = 4;
 
+    // 默认背景颜色
     public static final int BG_DEFAULT_COLOR = YELLOW;
 
+    // 定义字体大小常量
     public static final int TEXT_SMALL       = 0;
     public static final int TEXT_MEDIUM      = 1;
     public static final int TEXT_LARGE       = 2;
     public static final int TEXT_SUPER       = 3;
 
+    // 默认字体大小
     public static final int BG_DEFAULT_FONT_SIZE = TEXT_MEDIUM;
 
+    // 笔记编辑时的背景资源类
     public static class NoteBgResources {
+        // 编辑时的背景资源数组
         private final static int [] BG_EDIT_RESOURCES = new int [] {
             R.drawable.edit_yellow,
             R.drawable.edit_blue,
@@ -48,6 +55,7 @@ public class ResourceParser {
             R.drawable.edit_red
         };
 
+        // 编辑时标题的背景资源数组
         private final static int [] BG_EDIT_TITLE_RESOURCES = new int [] {
             R.drawable.edit_title_yellow,
             R.drawable.edit_title_blue,
@@ -56,25 +64,33 @@ public class ResourceParser {
             R.drawable.edit_title_red
         };
 
+        // 根据 ID 获取笔记编辑时的背景资源
         public static int getNoteBgResource(int id) {
             return BG_EDIT_RESOURCES[id];
         }
 
+        // 根据 ID 获取笔记编辑时标题的背景资源
         public static int getNoteTitleBgResource(int id) {
             return BG_EDIT_TITLE_RESOURCES[id];
         }
     }
 
+    // 获取默认背景 ID 的方法
     public static int getDefaultBgId(Context context) {
+        // 检查是否设置了背景颜色偏好
         if (PreferenceManager.getDefaultSharedPreferences(context).getBoolean(
                 NotesPreferenceActivity.PREFERENCE_SET_BG_COLOR_KEY, false)) {
+            // 若设置了，随机生成一个背景 ID
             return (int) (Math.random() * NoteBgResources.BG_EDIT_RESOURCES.length);
         } else {
+            // 若未设置，返回默认背景 ID
             return BG_DEFAULT_COLOR;
         }
     }
 
+    // 笔记列表项的背景资源类
     public static class NoteItemBgResources {
+        // 列表项第一个的背景资源数组
         private final static int [] BG_FIRST_RESOURCES = new int [] {
             R.drawable.list_yellow_up,
             R.drawable.list_blue_up,
@@ -83,6 +99,7 @@ public class ResourceParser {
             R.drawable.list_red_up
         };
 
+        // 列表项中间的背景资源数组
         private final static int [] BG_NORMAL_RESOURCES = new int [] {
             R.drawable.list_yellow_middle,
             R.drawable.list_blue_middle,
@@ -91,6 +108,7 @@ public class ResourceParser {
             R.drawable.list_red_middle
         };
 
+        // 列表项最后一个的背景资源数组
         private final static int [] BG_LAST_RESOURCES = new int [] {
             R.drawable.list_yellow_down,
             R.drawable.list_blue_down,
@@ -99,6 +117,7 @@ public class ResourceParser {
             R.drawable.list_red_down,
         };
 
+        // 列表项单个的背景资源数组
         private final static int [] BG_SINGLE_RESOURCES = new int [] {
             R.drawable.list_yellow_single,
             R.drawable.list_blue_single,
@@ -107,28 +126,35 @@ public class ResourceParser {
             R.drawable.list_red_single
         };
 
+        // 根据 ID 获取列表项第一个的背景资源
         public static int getNoteBgFirstRes(int id) {
             return BG_FIRST_RESOURCES[id];
         }
 
+        // 根据 ID 获取列表项最后一个的背景资源
         public static int getNoteBgLastRes(int id) {
             return BG_LAST_RESOURCES[id];
         }
 
+        // 根据 ID 获取列表项单个的背景资源
         public static int getNoteBgSingleRes(int id) {
             return BG_SINGLE_RESOURCES[id];
         }
 
+        // 根据 ID 获取列表项中间的背景资源
         public static int getNoteBgNormalRes(int id) {
             return BG_NORMAL_RESOURCES[id];
         }
 
+        // 获取文件夹的背景资源
         public static int getFolderBgRes() {
             return R.drawable.list_folder;
         }
     }
 
+    // 小部件的背景资源类
     public static class WidgetBgResources {
+        // 2x 小部件的背景资源数组
         private final static int [] BG_2X_RESOURCES = new int [] {
             R.drawable.widget_2x_yellow,
             R.drawable.widget_2x_blue,
@@ -137,10 +163,12 @@ public class ResourceParser {
             R.drawable.widget_2x_red,
         };
 
+        // 根据 ID 获取 2x 小部件的背景资源
         public static int getWidget2xBgResource(int id) {
             return BG_2X_RESOURCES[id];
         }
 
+        // 4x 小部件的背景资源数组
         private final static int [] BG_4X_RESOURCES = new int [] {
             R.drawable.widget_4x_yellow,
             R.drawable.widget_4x_blue,
@@ -149,12 +177,15 @@ public class ResourceParser {
             R.drawable.widget_4x_red
         };
 
+        // 根据 ID 获取 4x 小部件的背景资源
         public static int getWidget4xBgResource(int id) {
             return BG_4X_RESOURCES[id];
         }
     }
 
+    // 文本外观资源类
     public static class TextAppearanceResources {
+        // 文本外观资源数组
         private final static int [] TEXTAPPEARANCE_RESOURCES = new int [] {
             R.style.TextAppearanceNormal,
             R.style.TextAppearanceMedium,
@@ -162,20 +193,18 @@ public class ResourceParser {
             R.style.TextAppearanceSuper
         };
 
+        // 根据 ID 获取文本外观资源
         public static int getTexAppearanceResource(int id) {
-            /**
+            // 处理资源 ID 越界的情况
-             * HACKME: Fix bug of store the resource id in shared preference.
-             * The id may larger than the length of resources, in this case,
-             * return the {@link ResourceParser#BG_DEFAULT_FONT_SIZE}
-             */
             if (id >= TEXTAPPEARANCE_RESOURCES.length) {
                 return BG_DEFAULT_FONT_SIZE;
             }
             return TEXTAPPEARANCE_RESOURCES[id];
         }
 
+        // 获取文本外观资源数组的大小
         public static int getResourcesSize() {
             return TEXTAPPEARANCE_RESOURCES.length;
         }
     }
-}
+}

test.txt

@@ -0,0 +1 @@
+test