develop update 1

src/data/Contact.java

@@ -24,9 +24,25 @@ import android.telephony.PhoneNumberUtils;
 import android.util.Log;
 
 import java.util.HashMap;
-
+/**
-public class Contact {/*声明了Contact这个类*/
+ * @Package:        net.micode.notes.data
-    private static HashMap<String, String> sContactCache;//创建一个HashMap<String, String>类型的静态变量，作为缓存
+ * @ClassName:      Contact
+ * @Description:
+ * Contact类用于查询联系人信息并进行缓存。
+ * 该类包含一个静态的HashMap作为缓存，存储电话号码和对应的联系人名字。
+ * 通过调用getContact方法可以根据给定的电话号码查询联系人名字。
+ * 如果缓存中已经存在该电话号码对应的联系人名字，则直接返回缓存中的结果，否则通过查询数据库获取联系人名字并更新缓存。
+ * 该类还定义了一个私有的SQL筛选语句用于查询联系人信息。
+ * 注意：该类是线程不安全的，如果需要在多线程环境下使用，请做好同步控制
+ * @Author:         YangYizhe
+ * @CreateDate:     12/17/2023 10:10 AM
+ * @Version:        1.0
+ */
+public class Contact {
+    /**
+     * 作为缓存,存储电话号码和对应的联系人名字
+     */
+    private static HashMap<String, String> sContactCache;
     private static final String TAG = "Contact";//设置日志TAG标签
 
     //查询联系人的SQL筛选语句

src/data/Notes.java

@@ -17,9 +17,11 @@
 package net.micode.notes.data;
 
 import android.net.Uri;
+//Notes类就定义了很多常量，是小米便签的数据库
 public class Notes {
     public static final String AUTHORITY = "micode_notes";
     public static final String TAG = "Notes";
+    //三个type
     public static final int TYPE_NOTE     = 0;
     public static final int TYPE_FOLDER   = 1;
     public static final int TYPE_SYSTEM   = 2;
@@ -30,6 +32,7 @@ public class Notes {
      * {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder
      * {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records
      */
+    //不同种类的文件夹
     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;
@@ -45,12 +48,12 @@ public class Notes {
     public static final int TYPE_WIDGET_INVALIDE      = -1;
     public static final int TYPE_WIDGET_2X            = 0;
     public static final int TYPE_WIDGET_4X            = 1;
-
+    //数据常量 包括普通note和call_note
     public static class DataConstants {
         public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;
         public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;
     }
-
+    //两个指针，一个找便签和文件夹，一个用来找数据
     /**
      * Uri to query all notes and folders
      */
@@ -59,9 +62,11 @@ public class Notes {
     /**
      * Uri to query data
      */
-    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
 
+    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
+    //Notecolumns类，用于创建数据库的表头
     public interface NoteColumns {
+        //具体每一项都给了英文注释
         /**
          * The unique ID for a row
          * <P> Type: INTEGER (long) </P>
@@ -165,8 +170,14 @@ public class Notes {
          * <P> Type : INTEGER (long) </P>
          */
         public static final String VERSION = "version";
-    }
 
+        public static final String PASSWORD = "password";
+
+        public static final String IMPORTANCE = "importance";
+    }//便签的各种属性
+    /*
+     * 便签数据在数据库中的表头
+     */
     public interface DataColumns {
         /**
          * The unique ID for a row
@@ -239,7 +250,7 @@ public class Notes {
          * <P> Type: TEXT </P>
          */
         public static final String DATA5 = "data5";
-    }
+    }//一个便签内部各种数据类型
 
     public static final class TextNote implements DataColumns {
         /**
@@ -255,7 +266,7 @@ public class Notes {
         public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";
 
         public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
-    }
+    }//一种是文本textnote
 
     public static final class CallNote implements DataColumns {
         /**
@@ -275,5 +286,5 @@ public class Notes {
         public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";
 
         public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
-    }
+    }//另一种是通话类型的callnote
 }

src/data/NotesDatabaseHelper.java

@@ -21,17 +21,17 @@ import android.content.Context;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
 import android.util.Log;
-
+//引用了同一个包中的另一个子包Notes中一些接口
 import net.micode.notes.data.Notes.DataColumns;
 import net.micode.notes.data.Notes.DataConstants;
 import net.micode.notes.data.Notes.NoteColumns;
 
-
+//数据库操作
 public class NotesDatabaseHelper extends SQLiteOpenHelper {
     private static final String DB_NAME = "note.db";
 
     private static final int DB_VERSION = 4;
-
+    //接口两部分一个Note一个DATA
     public interface TABLE {
         public static final String NOTE = "note";
 
@@ -41,7 +41,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
     private static final String TAG = "NotesDatabaseHelper";
 
     private static NotesDatabaseHelper mInstance;
-
+    //基于NoteColumn创建一个NOTE_TABLE表格，并附上初始数据
     private static final String CREATE_NOTE_TABLE_SQL =
         "CREATE TABLE " + TABLE.NOTE + "(" +
             NoteColumns.ID + " INTEGER PRIMARY KEY," +
@@ -62,7 +62,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
             NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
             NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
         ")";
-
+    //主要基于datacolumn来创建DATA_TABLE
     private static final String CREATE_DATA_TABLE_SQL =
         "CREATE TABLE " + TABLE.DATA + "(" +
             DataColumns.ID + " INTEGER PRIMARY KEY," +
@@ -77,7 +77,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
             DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
             DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
         ")";
-
+    //这个数据是关于INDEX编号的
     private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
         "CREATE INDEX IF NOT EXISTS note_id_index ON " +
         TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
@@ -93,7 +93,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
         "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
         " END";
-
+    //移入note时触发，修改一系列数据，从哪来之类的
     /**
      * Decrease folder's note count when move note from folder
      */
@@ -106,7 +106,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
         "  AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
         " END";
-
+    //移除Note时触发，与上面移入对应
     /**
      * Increase folder's note count when insert new note to the folder
      */
@@ -118,7 +118,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
         "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
         " END";
-
+    //插入Note
     /**
      * Decrease folder's note count when delete note from the folder
      */
@@ -131,7 +131,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
         "  AND " + NoteColumns.NOTES_COUNT + ">0;" +
         " END";
-
+    //删除note
     /**
      * Update note's content when insert data with type {@link DataConstants#NOTE}
      */
@@ -144,7 +144,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
         "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
         " END";
-
+    //当给note插入新数据时触发
     /**
      * Update note's content when data with {@link DataConstants#NOTE} type has changed
      */
@@ -156,7 +156,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
         "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
-        " END";
+        " END";//note数据被修改update
 
     /**
      * Update note's content when data with {@link DataConstants#NOTE} type has deleted
@@ -169,7 +169,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.SNIPPET + "=''" +
         "  WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
-        " END";
+        " END";//更新已经删除的便签的数据
 
     /**
      * Delete datas belong to note which has been deleted
@@ -180,7 +180,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         " BEGIN" +
         "  DELETE FROM " + TABLE.DATA +
         "   WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+        " END";//删除 已经被删除的便签的数据
 
     /**
      * Delete notes belong to folder which has been deleted
@@ -191,7 +191,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         " BEGIN" +
         "  DELETE FROM " + TABLE.NOTE +
         "   WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+        " END";//删除 已删除folder文件夹 中的便签要修改的数据
 
     /**
      * Move notes belong to folder which has been moved to trash folder
@@ -204,12 +204,12 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
         "  WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+        " END";//移动trash_folder中的便签
 
     public NotesDatabaseHelper(Context context) {
         super(context, DB_NAME, null, DB_VERSION);
     }
-
+    //构造函数
     public void createNoteTable(SQLiteDatabase db) {
         db.execSQL(CREATE_NOTE_TABLE_SQL);
         reCreateNoteTableTriggers(db);
@@ -233,7 +233,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
         db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
         db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
-    }
+    }//数据库操作的API，重新创建
 
     private void createSystemFolder(SQLiteDatabase db) {
         ContentValues values = new ContentValues();
@@ -268,14 +268,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
         values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
         db.insert(TABLE.NOTE, null, values);
-    }
+    }//创建系统文件夹
 
     public void createDataTable(SQLiteDatabase db) {
         db.execSQL(CREATE_DATA_TABLE_SQL);
         reCreateDataTableTriggers(db);
         db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
         Log.d(TAG, "data table has been created");
-    }
+    }//创建数据表格
 
     private void reCreateDataTableTriggers(SQLiteDatabase db) {
         db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
@@ -285,20 +285,20 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         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);
-    }
+    }//类似于recreatenotetable，重新创建触发器
 
     static synchronized NotesDatabaseHelper getInstance(Context context) {
         if (mInstance == null) {
             mInstance = new NotesDatabaseHelper(context);
         }
         return mInstance;
-    }
+    }//sync同步，同一时刻只有一个线程执行
 
     @Override
     public void onCreate(SQLiteDatabase db) {
         createNoteTable(db);
         createDataTable(db);
-    }
+    }//创建Note Data两个表格
 
     @Override
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
@@ -331,14 +331,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
             throw new IllegalStateException("Upgrade notes database to version " + newVersion
                     + "fails");
         }
-    }
+    }//数据库版本更新
 
     private void upgradeToV2(SQLiteDatabase db) {
         db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
         db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
         createNoteTable(db);
         createDataTable(db);
-    }
+    }//更新到V2
 
     private void upgradeToV3(SQLiteDatabase db) {
         // drop unused triggers
@@ -353,10 +353,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
         values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
         db.insert(TABLE.NOTE, null, values);
-    }
+    }//更新到V3
 
     private void upgradeToV4(SQLiteDatabase db) {
         db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
                 + " INTEGER NOT NULL DEFAULT 0");
-    }
+    }//更新到V4
 }

src/data/NotesProvider.java

@@ -1,22 +1,5 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.data;
 
-
 import android.app.SearchManager;
 import android.content.ContentProvider;
 import android.content.ContentUris;
@@ -33,9 +16,15 @@ import net.micode.notes.R;
 import net.micode.notes.data.Notes.DataColumns;
 import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.data.NotesDatabaseHelper.TABLE;
-
+//为存储和获取数据提供接口。可以在不同的应用程序之间共享数据
-
+//ContentProvider提供的方法
+//query：查询
+//insert：插入
+//update：更新
+//delete：删除
+//getType：得到数据类型
 public class NotesProvider extends ContentProvider {
+    // UriMatcher用于匹配Uri
     private static final UriMatcher mMatcher;
 
     private NotesDatabaseHelper mHelper;
@@ -51,7 +40,9 @@ public class NotesProvider extends ContentProvider {
     private static final int URI_SEARCH_SUGGEST  = 6;
 
     static {
+        // 创建UriMatcher时，调用UriMatcher(UriMatcher.NO_MATCH)表示不匹配任何路径的返回码
         mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+        // 把需要匹配Uri路径全部给注册上
         mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
         mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM);
         mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA);
@@ -65,33 +56,40 @@ public class NotesProvider extends ContentProvider {
      * x'0A' represents the '\n' character in sqlite. For title and content in the search result,
      * we will trim '\n' and white space in order to show more information.
      */
+    // 声明 NOTES_SEARCH_PROJECTION
     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;
-
+    // 声明NOTES_SNIPPET_SEARCH_QUERY
     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;
 
     @Override
+    // Context只有在onCreate()中才被初始化
+    // 对mHelper进行实例化
     public boolean onCreate() {
         mHelper = NotesDatabaseHelper.getInstance(getContext());
         return true;
     }
 
     @Override
+    // 查询uri在数据库中对应的位置
     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;
+        // 匹配查找uri
         switch (mMatcher.match(uri)) {
+            // 对于不同的匹配值，在数据库中查找相应的条目
             case URI_NOTE:
                 c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
                         sortOrder);
@@ -113,6 +111,7 @@ public class NotesProvider extends ContentProvider {
             case URI_SEARCH:
             case URI_SEARCH_SUGGEST:
                 if (sortOrder != null || projection != null) {
+                    // 不合法的参数异常
                     throw new IllegalArgumentException(
                             "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
                 }
@@ -120,6 +119,8 @@ public class NotesProvider extends ContentProvider {
                 String searchString = null;
                 if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
                     if (uri.getPathSegments().size() > 1) {
+                        // getPathSegments()方法得到一个String的List，
+                        // 在uri.getPathSegments().get(1)为第2个元素
                         searchString = uri.getPathSegments().get(1);
                     }
                 } else {
@@ -139,6 +140,7 @@ public class NotesProvider extends ContentProvider {
                 }
                 break;
             default:
+                // 抛出异常
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
         if (c != null) {
@@ -148,13 +150,17 @@ public class NotesProvider extends ContentProvider {
     }
 
     @Override
+    // 插入一个uri
     public Uri insert(Uri uri, ContentValues values) {
+        // 获得可写的数据库
         SQLiteDatabase db = mHelper.getWritableDatabase();
         long dataId = 0, noteId = 0, insertedId = 0;
         switch (mMatcher.match(uri)) {
+            // 新增一个条目
             case URI_NOTE:
                 insertedId = noteId = db.insert(TABLE.NOTE, null, values);
                 break;
+            // 如果存在，查找NOTE_ID
             case URI_DATA:
                 if (values.containsKey(DataColumns.NOTE_ID)) {
                     noteId = values.getAsLong(DataColumns.NOTE_ID);
@@ -167,6 +173,7 @@ public class NotesProvider extends ContentProvider {
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
         // Notify the note uri
+        // notifyChange获得一个ContextResolver对象并且更新里面的内容
         if (noteId > 0) {
             getContext().getContentResolver().notifyChange(
                     ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
@@ -178,13 +185,17 @@ public class NotesProvider extends ContentProvider {
                     ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
         }
 
+        // 返回插入的uri的路径
         return ContentUris.withAppendedId(uri, insertedId);
     }
 
     @Override
+    // 删除一个uri
     public int delete(Uri uri, String selection, String[] selectionArgs) {
+        //Uri代表要操作的数据，Android上可用的每种资源 -包括 图像、视频片段、音频资源等都可以用Uri来表示。
         int count = 0;
         String id = null;
+        // 获得可写的数据库
         SQLiteDatabase db = mHelper.getWritableDatabase();
         boolean deleteData = false;
         switch (mMatcher.match(uri)) {
@@ -228,6 +239,7 @@ public class NotesProvider extends ContentProvider {
     }
 
     @Override
+    // 更新一个uri
     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
         int count = 0;
         String id = null;
@@ -267,10 +279,12 @@ public class NotesProvider extends ContentProvider {
         return count;
     }
 
+    // 将字符串解析成规定格式
     private String parseSelection(String selection) {
         return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
     }
 
+    //增加一个noteVersion
     private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
         StringBuilder sql = new StringBuilder(120);
         sql.append("UPDATE ");
@@ -293,6 +307,7 @@ public class NotesProvider extends ContentProvider {
             sql.append(selectString);
         }
 
+        // execSQL()方法可以执行insert、delete、update和CREATE TABLE之类有更改行为的SQL语句
         mHelper.getWritableDatabase().execSQL(sql.toString());
     }
 

src/model/Note.java

@@ -33,16 +33,32 @@ import net.micode.notes.data.Notes.TextNote;
 
 import java.util.ArrayList;
 
-
+/**
+ * @Package:        net.micode.notes.model
+ * @ClassName:      Note
+ * @Description:    笔记类，用于操作和管理笔记数据
+ * @Author:         YangYizhe
+ * @CreateDate:     12/17/2023 10:06 AM
+ * @UpdateUser:     none
+ * @UpdateDate:     12/17/2023 10:06 AM
+ * @UpdateRemark:   none
+ * @Version:        1.0
+ */
 public class Note {
     private ContentValues mNoteDiffValues;
     private NoteData mNoteData;
     private static final String TAG = "Note";
     /**
-     * Create a new note id for adding a new note to databases
+     * @method  getNewNoteId
+     * @description 获取新的笔记ID，用于向数据库中添加新的笔记
+     * @date: 12/20/2023 11:23 PM
+     * @author: YangYizhe
+     * @param folderId 文件夹Id
+     * @return noteId 新的笔记Id
      */
     public static synchronized long getNewNoteId(Context context, long folderId) {
         // Create a new note in the database
+        // 在数据库中创建一个新的笔记
         ContentValues values = new ContentValues();
         long createdTime = System.currentTimeMillis();
         values.put(NoteColumns.CREATED_DATE, createdTime);
@@ -69,37 +85,90 @@ public class Note {
         mNoteDiffValues = new ContentValues();
         mNoteData = new NoteData();
     }
-
+    /**
+     * @method  setNoteValue
+     * @description 设置笔记的值
+     * @date: 12/20/2023 11:31 PM
+     * @author: YangYizhe
+     * @param key
+     * @param value
+     */
     public void setNoteValue(String key, String value) {
         mNoteDiffValues.put(key, value);
         mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
         mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
     }
-
+    /**
+     * @method  setTextData
+     * @description 设置文本数据
+     * @date: 12/20/2023 11:31 PM
+     * @author: YangYizhe
+     * @param key
+     * @param value
+     */
     public void setTextData(String key, String value) {
         mNoteData.setTextData(key, value);
     }
-
+    /**
+     * @method  setTextDataId
+     * @description 设置文本数据ID
+     * @date: 12/20/2023 11:33 PM
+     * @author: YangYizhe
+     * @param id
+     */
     public void setTextDataId(long id) {
         mNoteData.setTextDataId(id);
     }
-
+    /**
+     * @method  getTextDataId
+     * @description 获取文本数据Id
+     * @date: 12/20/2023 11:34 PM
+     * @author: YangYizhe
+     * @return mTextDataId 文本数据Id
+     */
     public long getTextDataId() {
         return mNoteData.mTextDataId;
     }
-
+    /**
+     * @method  setCallDataId
+     * @description 设置通话记录数据ID
+     * @date: 12/20/2023 11:35 PM
+     * @author: YangYizhe
+     * @param id 通话记录数据id
+     */
     public void setCallDataId(long id) {
         mNoteData.setCallDataId(id);
     }
-
+    /**
+     * @method  setCallData
+     * @description 设置通话记录数据
+     * @date: 12/20/2023 11:36 PM
+     * @author: YangYizhe
+     * @param key
+     * @param value
+     */
     public void setCallData(String key, String value) {
         mNoteData.setCallData(key, value);
     }
-
+    /**
+     * @method  isLocalModified
+     * @description 判断笔记是否有本地修改
+     * @date: 12/20/2023 11:38 PM
+     * @author: YangYizhe
+     * @return bool 是否有本地修改
+     */
     public boolean isLocalModified() {
         return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified();
     }
-
+    /**
+     * @method  syncNote
+     * @description 同步笔记，将本地修改的数据同步到服务器
+     * @date: 12/20/2023 11:42 PM
+     * @author: YangYizhe
+     * @param context 上下文对象
+     * @param noteId 笔记ID
+     * @return bool 是否同步成功
+     */
     public boolean syncNote(Context context, long noteId) {
         if (noteId <= 0) {
             throw new IllegalArgumentException("Wrong note id:" + noteId);

src/model/WorkingNote.java

@@ -31,7 +31,17 @@ import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.data.Notes.TextNote;
 import net.micode.notes.tool.ResourceParser.NoteBgResources;
 
-
+/**
+ * @Package:        net.micode.notes.model
+ * @ClassName:      WorkingNote
+ * @Description:
+ * 工作笔记类，用于表示一条工作笔记的信息
+ * Note 类是一个基本的笔记类，包含了笔记的基本信息，如标题、内容等
+ * WorkingNote 类则是在 Note 类的基础上进行扩展，增加了一些与工作笔记相关的属性和方法，例如提醒日期、背景颜色、小部件等。
+ * @Author:         YangYizhe
+ * @CreateDate:     12/20/2023 11:48 PM
+ * @Version:        1.0
+ */
 public class WorkingNote {
     // Note for the working note
     private Note mNote;
@@ -59,7 +69,9 @@ public class WorkingNote {
     private static final String TAG = "WorkingNote";
 
     private boolean mIsDeleted;
-
+    /**
+     * 笔记设置状态变化监听器
+     */
     private NoteSettingChangedListener mNoteSettingStatusListener;
 
     public static final String[] DATA_PROJECTION = new String[] {
@@ -102,6 +114,14 @@ public class WorkingNote {
     private static final int NOTE_MODIFIED_DATE_COLUMN = 5;
 
     // New note construct
+    /**
+     * @method  WorkingNote
+     * @description 构造方法，创建一个新的工作笔记
+     * @date: 12/20/2023 11:54 PM
+     * @author: YangYizhe
+     * @param context 上下文环境
+     * @param folderId 笔记所属的文件夹ID
+     */
     private WorkingNote(Context context, long folderId) {
         mContext = context;
         mAlertDate = 0;
@@ -113,7 +133,15 @@ public class WorkingNote {
         mMode = 0;
         mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
     }
-
+    /**
+     * @method  WorkingNote
+     * @description 构造方法，加载一个已存在的工作笔记
+     * @date: 12/20/2023 11:54 PM
+     * @author: YangYizhe
+     * @param context 上下文环境
+     * @param noteId 笔记的ID
+     * @param folderId 笔记所属的文件夹ID
+     */
     // Existing note construct
     private WorkingNote(Context context, long noteId, long folderId) {
         mContext = context;
@@ -123,7 +151,12 @@ public class WorkingNote {
         mNote = new Note();
         loadNote();
     }
-
+    /**
+     * @method  loadNote
+     * @description 加载笔记的详细信息
+     * @date: 12/20/2023 11:55 PM
+     * @author: YangYizhe
+     */
     private void loadNote() {
         Cursor cursor = mContext.getContentResolver().query(
                 ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mNoteId), NOTE_PROJECTION, null,
@@ -145,7 +178,12 @@ public class WorkingNote {
         }
         loadNoteData();
     }
-
+    /**
+     * @method  loadNoteData
+     * @description 加载笔记的Data
+     * @date: 12/20/2023 11:55 PM
+     * @author: YangYizhe
+     */
     private void loadNoteData() {
         Cursor cursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, DATA_PROJECTION,
                 DataColumns.NOTE_ID + "=?", new String[] {
@@ -173,7 +211,18 @@ public class WorkingNote {
             throw new IllegalArgumentException("Unable to find note's data with id " + mNoteId);
         }
     }
-
+    /**
+     * @method  createEmptyNote
+     * @description 创建一个空的工作笔记
+     * @date: 12/20/2023 11:56 PM
+     * @author: YangYizhe
+     * @param context 上下文环境
+     * @param folderId 笔记所属的文件夹ID
+     * @param widgetId 笔记的小部件ID
+     * @param widgetType 笔记的小部件类型
+     * @param defaultBgColorId 笔记的默认背景颜色ID
+     * @return note 创建的空的工作笔记对象
+     */
     public static WorkingNote createEmptyNote(Context context, long folderId, int widgetId,
             int widgetType, int defaultBgColorId) {
         WorkingNote note = new WorkingNote(context, folderId);

src/ui/AlarmAlertActivity.java

@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import android.app.Activity;
@@ -38,34 +22,54 @@ import net.micode.notes.data.Notes;
 import net.micode.notes.tool.DataUtils;
 
 import java.io.IOException;
-
+/**
-
+ * @Package:        net.micode.notes.ui
+ * @ClassName:      AlarmAlertActivity
+ * @Description:    闹钟提醒界面
+ * @Author:         YangYizhe
+ * @CreateDate:     12/21/2023 12:02 AM
+ * @Version:        1.0
+ */
 public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
-    private long mNoteId;
+    private long mNoteId;      //文本在数据库存储中的ID号
-    private String mSnippet;
+    private String mSnippet;   //闹钟提示时出现的文本片段
     private static final int SNIPPET_PREW_MAX_LEN = 60;
     MediaPlayer mPlayer;
-
+    /**
+     * @method  onCreate
+     * @description 当 Activity 创建时调用的生命周期方法
+     * @date: 12/21/2023 12:05 AM
+     * @author: YangYizhe
+     * @param savedInstanceState 保存 Activity 状态的 Bundle 对象
+     * @return null
+     */
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        // 设置界面显示——无标题
         requestWindowFeature(Window.FEATURE_NO_TITLE);
 
         final Window win = getWindow();
+        // 设置窗体属性——在锁屏时显示
         win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
 
         if (!isScreenOn()) {
+            // 设置窗体属性——保持点亮、点亮屏幕、允许点亮时解锁
             win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
                     | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
                     | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
                     | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
         }
 
+        // 获取传递的 Intent
         Intent intent = getIntent();
 
         try {
+            // 从 Intent 中获取数据并处理——获取标签 ID
             mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
+            // 根据 ID 从数据库中获取标签内容
             mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
+            // 判断标签片段是否达到符合长度
             mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0,
                     SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info)
                     : mSnippet;
@@ -76,21 +80,26 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
 
         mPlayer = new MediaPlayer();
         if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
+            // 显示对话框
             showActionDialog();
+            // 播放闹钟提示音
             playAlarmSound();
         } else {
+            // 结束当前 Activity
             finish();
         }
     }
 
     private boolean isScreenOn() {
+        //判断屏幕是否锁屏，调用系统函数判断，最后返回值是布尔类型
         PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
         return pm.isScreenOn();
     }
 
     private void playAlarmSound() {
+        //闹钟提示音激发
         Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
-
+        //调用系统的铃声管理URI，得到闹钟提示音
         int silentModeStreams = Settings.System.getInt(getContentResolver(),
                 Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0);
 
@@ -101,12 +110,19 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
         }
         try {
             mPlayer.setDataSource(this, url);
+            //方法：setDataSource(Context context, Uri uri) 
+            //解释：无返回值，设置多媒体数据来源【根据 Uri】
             mPlayer.prepare();
+            //准备同步
             mPlayer.setLooping(true);
+            //设置是否循环播放
             mPlayer.start();
+            //开始播放
         } catch (IllegalArgumentException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
+            //e.printStackTrace()函数功能是抛出异常， 还将显示出更深的调用信息
+            //System.out.println(e)，这个方法打印出异常，并且输出在哪里出现的异常
         } catch (SecurityException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
@@ -121,37 +137,58 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
 
     private void showActionDialog() {
         AlertDialog.Builder dialog = new AlertDialog.Builder(this);
+        /* AlertDialog的构造方法全部是Protected的
+        * 所以不能直接通过new一个AlertDialog来创建出一个AlertDialog。
+        * 要创建一个AlertDialog，就要用到AlertDialog.Builder中的create()方法
+        * 如这里的dialog就是新建了一个AlertDialog
+        */
         dialog.setTitle(R.string.app_name);
+        //为对话框设置标题
         dialog.setMessage(mSnippet);
+        //为对话框设置内容
         dialog.setPositiveButton(R.string.notealert_ok, this);
+        //给对话框添加"Yes"按钮
         if (isScreenOn()) {
             dialog.setNegativeButton(R.string.notealert_enter, this);
-        }
+        }//对话框添加"No"按钮
         dialog.show().setOnDismissListener(this);
     }
 
     public void onClick(DialogInterface dialog, int which) {
         switch (which) {
+            //用which来选择click后下一步的操作
             case DialogInterface.BUTTON_NEGATIVE:
+                //这是取消操作
                 Intent intent = new Intent(this, NoteEditActivity.class);
+                //实现两个类间的数据传输
                 intent.setAction(Intent.ACTION_VIEW);
+                //设置动作属性
                 intent.putExtra(Intent.EXTRA_UID, mNoteId);
+                //实现key-value对
+                //EXTRA_UID为key；mNoteId为键
                 startActivity(intent);
+                //开始动作
                 break;
             default:
+                //这是确定操作
                 break;
         }
     }
 
     public void onDismiss(DialogInterface dialog) {
+        //忽略
         stopAlarmSound();
+        //停止闹钟声音
         finish();
+        //完成该动作
     }
 
     private void stopAlarmSound() {
         if (mPlayer != null) {
             mPlayer.stop();
+            //停止播放
             mPlayer.release();
+            //释放MediaPlayer对象
             mPlayer = null;
         }
     }

src/ui/AlarmInitReceiver.java

@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import android.app.AlarmManager;
@@ -27,25 +11,38 @@ import android.database.Cursor;
 import net.micode.notes.data.Notes;
 import net.micode.notes.data.Notes.NoteColumns;
 
-
+/**
+ * @Package:        net.micode.notes.ui
+ * @ClassName:      AlarmInitReceiver
+ * @Description:
+ * AlarmInitReceiver 是一个广播接收器（BroadcastReceiver）的类
+ * 广播接收器是 Android 中常用的一种组件，用于接收并处理系统或应用发送的广播消息
+ * @Author:         YangYizhe
+ * @CreateDate:     12/21/2023 12:09 AM
+ * @Version:        1.0
+ */
 public class AlarmInitReceiver extends BroadcastReceiver {
 
     private static final String [] PROJECTION = new String [] {
-        NoteColumns.ID,
+            NoteColumns.ID,
-        NoteColumns.ALERTED_DATE
+            NoteColumns.ALERTED_DATE
     };
-
+    //对数据库的操作，调用标签ID和闹钟时间
     private static final int COLUMN_ID                = 0;
     private static final int COLUMN_ALERTED_DATE      = 1;
 
     @Override
     public void onReceive(Context context, Intent intent) {
         long currentDate = System.currentTimeMillis();
+        //System.currentTimeMillis()产生一个当前的毫秒
+        //这个毫秒其实就是自1970年1月1日0时起的毫秒数
         Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
                 PROJECTION,
                 NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,
                 new String[] { String.valueOf(currentDate) },
+                //将long变量currentDate转化为字符串
                 null);
+        //Cursor在这里的作用是通过查找数据库中的标签内容，找到和当前系统时间相等的标签
 
         if (c != null) {
             if (c.moveToFirst()) {

src/ui/AlarmReceiver.java

@@ -1,30 +1,30 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
-
+/**
+ * @Package:        net.micode.notes.ui
+ * @ClassName:      AlarmReceiver
+ * @Description:
+ * @Author:         YangYizhe
+ * @CreateDate:     12/17/2023 10:02 AM
+ * @UpdateUser:     none
+ * @UpdateDate:     12/17/2023 10:02 AM
+ * @UpdateRemark:   none
+ * @Version:        1.0
+ */
 public class AlarmReceiver extends BroadcastReceiver {
     @Override
     public void onReceive(Context context, Intent intent) {
         intent.setClass(context, AlarmAlertActivity.class);
+        //启动AlarmAlertActivity
         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        //activity要存在于activity的栈中，而非activity的途径启动activity时必然不存在一个activity的栈
+        //所以要新起一个栈装入启动的activity
         context.startActivity(intent);
     }
 }
+//这是实现alarm这个功能最接近用户层的包，基于上面的两个包，
+//作用还需要深究但是对于setClass和addFlags的
+ 

src/ui/DateTimePicker.java

@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import java.text.DateFormatSymbols;
@@ -27,9 +11,22 @@ import android.text.format.DateFormat;
 import android.view.View;
 import android.widget.FrameLayout;
 import android.widget.NumberPicker;
-
+/**
+ * @Package:        net.micode.notes.ui
+ * @ClassName:      DateTimePicker
+ * @Description: 继承自FrameLayout，实现了日期和时间的选择功能
+ * 提供一个用户界面，让用户可以方便地选择日期和时间，并且能够监听用户对日期和时间的改变
+ * 构造方法，包括默认构造方法和带参数的构造方法，用于初始化日期选择器的界面和属性；
+ * 一系列的回调方法，用于监听日期和时间的改变，包括日期选择、小时选择、分钟选择、上午/下午选择等；
+ * 一些公开的接口方法，用于设置当前日期、时间，设置24小时模式或12小时模式的切换等；
+ * 辅助方法，用于更新日期、小时、上午/下午选择器的界面显示和属性；
+ * 回调接口OnDateTimeChangedListener，用于监听日期和时间的改变事件。
+ * @Author:         YangYizhe
+ * @CreateDate:     12/21/2023 12:18 AM
+ * @Version:        1.0
+ */
 public class DateTimePicker extends FrameLayout {
-
+    //FrameLayout是布局模板之一
     private static final boolean DEFAULT_ENABLE_STATE = true;
 
     private static final int HOURS_IN_HALF_DAY = 12;
@@ -45,13 +42,17 @@ public class DateTimePicker extends FrameLayout {
     private static final int MINUT_SPINNER_MAX_VAL = 59;
     private static final int AMPM_SPINNER_MIN_VAL = 0;
     private static final int AMPM_SPINNER_MAX_VAL = 1;
-
+    /**
+     * 初始化控件
+     * NumberPicker是数字选择器
+     * 这里定义的四个变量全部是在设置闹钟时需要选择的变量（如日期、时、分、上午或者下午）
+     */
     private final NumberPicker mDateSpinner;
     private final NumberPicker mHourSpinner;
     private final NumberPicker mMinuteSpinner;
     private final NumberPicker mAmPmSpinner;
+    //定义了Calendar类型的变量mDate，用于操作时间
     private Calendar mDate;
-
     private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK];
 
     private boolean mIsAm;
@@ -71,41 +72,49 @@ public class DateTimePicker extends FrameLayout {
             updateDateControl();
             onDateTimeChanged();
         }
-    };
+    };//OnValueChangeListener，这是时间改变监听器，这里主要是对日期的监听
+
 
     private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() {
+        //这里是对 小时（Hour） 的监听
         @Override
         public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
             boolean isDateChanged = false;
             Calendar cal = Calendar.getInstance();
+            //声明一个Calendar的变量cal，便于后续的操作
             if (!mIs24HourView) {
                 if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, 1);
                     isDateChanged = true;
+                    //这里是对于12小时制时，晚上11点和12点交替时对日期的更改
                 } else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, -1);
                     isDateChanged = true;
                 }
+                //这里是对于12小时制时，凌晨11点和12点交替时对日期的更改
                 if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY ||
                         oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
                     mIsAm = !mIsAm;
                     updateAmPmControl();
-                }
+                }//这里是对于12小时制时，中午11点和12点交替时对AM和PM的更改
             } else {
                 if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, 1);
                     isDateChanged = true;
+                    //这里是对于24小时制时，晚上11点和12点交替时对日期的更改
                 } else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, -1);
                     isDateChanged = true;
                 }
-            }
+            } //这里是对于12小时制时，凌晨11点和12点交替时对日期的更改
             int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);
+            //通过数字选择器对newHour的赋值
             mDate.set(Calendar.HOUR_OF_DAY, newHour);
+            //通过set函数将新的Hour值传给mDate
             onDateTimeChanged();
             if (isDateChanged) {
                 setCurrentYear(cal.get(Calendar.YEAR));
@@ -117,15 +126,19 @@ public class DateTimePicker extends FrameLayout {
 
     private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
         @Override
+        //这里是对 分钟（Minute）改变的监听
         public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
             int minValue = mMinuteSpinner.getMinValue();
             int maxValue = mMinuteSpinner.getMaxValue();
             int offset = 0;
+            //设置offset，作为小时改变的一个记录数据
             if (oldVal == maxValue && newVal == minValue) {
                 offset += 1;
             } else if (oldVal == minValue && newVal == maxValue) {
                 offset -= 1;
             }
+            //如果原值为59，新值为0，则offset加1
+            //如果原值为0，新值为59，则offset减1
             if (offset != 0) {
                 mDate.add(Calendar.HOUR_OF_DAY, offset);
                 mHourSpinner.setValue(getCurrentHour());
@@ -145,6 +158,7 @@ public class DateTimePicker extends FrameLayout {
     };
 
     private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {
+        //对AM和PM的监听
         @Override
         public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
             mIsAm = !mIsAm;
@@ -160,24 +174,31 @@ public class DateTimePicker extends FrameLayout {
 
     public interface OnDateTimeChangedListener {
         void onDateTimeChanged(DateTimePicker view, int year, int month,
-                int dayOfMonth, int hourOfDay, int minute);
+                               int dayOfMonth, int hourOfDay, int minute);
     }
-
+    /**
+     * 构造方法
+     */
     public DateTimePicker(Context context) {
+        //通过对数据库的访问，获取当前的系统时间
         this(context, System.currentTimeMillis());
     }
 
     public DateTimePicker(Context context, long date) {
+        //上面函数的得到的是一个天文数字（1970至今的秒数），需要DateFormat将其变得有意义
         this(context, date, DateFormat.is24HourFormat(context));
     }
 
     public DateTimePicker(Context context, long date, boolean is24HourView) {
         super(context);
+        //获取系统时间
         mDate = Calendar.getInstance();
         mInitialising = true;
         mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY;
         inflate(context, R.layout.datetime_picker, this);
-
+        //如果当前Activity里用到别的layout，比如对话框layout
+        //还要设置这个layout上的其他组件的内容，就必须用inflate()方法先将对话框的layout找出来
+        //然后再用findViewById()找到它上面的其它组件
         mDateSpinner = (NumberPicker) findViewById(R.id.date);
         mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);
         mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);
@@ -185,7 +206,7 @@ public class DateTimePicker extends FrameLayout {
 
         mHourSpinner = (NumberPicker) findViewById(R.id.hour);
         mHourSpinner.setOnValueChangedListener(mOnHourChangedListener);
-        mMinuteSpinner =  (NumberPicker) findViewById(R.id.minute);
+        mMinuteSpinner = (NumberPicker) findViewById(R.id.minute);
         mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL);
         mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL);
         mMinuteSpinner.setOnLongPressUpdateInterval(100);
@@ -214,6 +235,18 @@ public class DateTimePicker extends FrameLayout {
         mInitialising = false;
     }
 
+    /**
+     * @method  setEnabled
+     * @description
+     * 用于设置是否启用日期选择器控件的功能
+     * 先通过传入的参数enabled判断是否需要改变控件的启用状态。
+     * 如果传入的参数和当前的启用状态相同，则直接返回，不进行任何操作
+     * 如果传入的参数和当前的启用状态不同，则调用父类的setEnabled方法，来设置整个日期选择器控件的启用状态
+     * 分别设置日期选择、分钟选择、小时选择、上午/下午选择这几个子控件的启用状态，即调用对应的setEnabled方法，并将enabled参数传入
+     * @date: 12/21/2023 12:27 AM
+     * @author: YangYizhe
+     * @param enabled
+     */
     @Override
     public void setEnabled(boolean enabled) {
         if (mIsEnabled == enabled) {
@@ -226,7 +259,6 @@ public class DateTimePicker extends FrameLayout {
         mAmPmSpinner.setEnabled(enabled);
         mIsEnabled = enabled;
     }
-
     @Override
     public boolean isEnabled() {
         return mIsEnabled;
@@ -239,7 +271,7 @@ public class DateTimePicker extends FrameLayout {
      */
     public long getCurrentDateInTimeMillis() {
         return mDate.getTimeInMillis();
-    }
+    }//实现函数——得到当前的秒数
 
     /**
      * Set the current date
@@ -263,7 +295,7 @@ public class DateTimePicker extends FrameLayout {
      * @param minute The current minute
      */
     public void setCurrentDate(int year, int month,
-            int dayOfMonth, int hourOfDay, int minute) {
+                               int dayOfMonth, int hourOfDay, int minute) {
         setCurrentYear(year);
         setCurrentMonth(month);
         setCurrentDay(dayOfMonth);
@@ -433,7 +465,10 @@ public class DateTimePicker extends FrameLayout {
         setCurrentHour(hour);
         updateAmPmControl();
     }
-
+    /**
+     * 几个辅助方法，用于更新日期、上午/下午选择和小时选择控件的显示和属性
+     * 这些方法的作用是在选择器控件显示之前或用户改变了日期、时间模式时，更新相应控件的显示和属性，以保持界面的正确性和一致性
+     */
     private void updateDateControl() {
         Calendar cal = Calendar.getInstance();
         cal.setTimeInMillis(mDate.getTimeInMillis());

src/ui/DateTimePickerDialog.java

@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import java.util.Calendar;
@@ -28,7 +12,20 @@ import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.text.format.DateFormat;
 import android.text.format.DateUtils;
-
+/**
+ * @Package:        net.micode.notes.ui
+ * @ClassName:      DateTimePickerDialog
+ * @Description:
+ * DateTimePickerDialog是一个自定义对话框，允许用户选择日期和时间。
+ * 它继承自AlertDialog类，并实现OnClickListener接口。
+ * 对话框包含一个DateTimePicker控件，用于选择日期和时间。
+ * 通过OnDateTimeSetListener接口将选择的日期和时间传递给监听器。
+ * 对话框还提供了设置24小时制和使用选择的日期更新对话框标题的方法。
+ * onClick方法处理按钮点击事件，并在日期和时间设置完成时通知监听器。
+ * @Author:         YangYizhe
+ * @CreateDate:     12/21/2023 12:32 AM
+ * @Version:        1.0
+ */
 public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
 
     private Calendar mDate = Calendar.getInstance();
@@ -36,17 +33,27 @@ public class DateTimePickerDialog extends AlertDialog implements OnClickListener
     private OnDateTimeSetListener mOnDateTimeSetListener;
     private DateTimePicker mDateTimePicker;
 
+    /**
+     * 用于接收用户设置的日期和时间的接口。
+     */
     public interface OnDateTimeSetListener {
         void OnDateTimeSet(AlertDialog dialog, long date);
     }
 
+    /**
+     * 构造一个新的DateTimePickerDialog。
+     *
+     * @param context 上下文环境。
+     * @param date    要在对话框中显示的初始日期。
+     */
     public DateTimePickerDialog(Context context, long date) {
         super(context);
         mDateTimePicker = new DateTimePicker(context);
         setView(mDateTimePicker);
+
         mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() {
             public void onDateTimeChanged(DateTimePicker view, int year, int month,
-                    int dayOfMonth, int hourOfDay, int minute) {
+                                          int dayOfMonth, int hourOfDay, int minute) {
                 mDate.set(Calendar.YEAR, year);
                 mDate.set(Calendar.MONTH, month);
                 mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
@@ -55,32 +62,57 @@ public class DateTimePickerDialog extends AlertDialog implements OnClickListener
                 updateTitle(mDate.getTimeInMillis());
             }
         });
+
         mDate.setTimeInMillis(date);
         mDate.set(Calendar.SECOND, 0);
         mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());
+
         setButton(context.getString(R.string.datetime_dialog_ok), this);
-        setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null);
+        setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener) null);
+
         set24HourView(DateFormat.is24HourFormat(this.getContext()));
         updateTitle(mDate.getTimeInMillis());
     }
 
+    /**
+     * 设置对话框是否为24小时制。
+     *
+     * @param is24HourView 如果对话框为24小时制，则为true；否则为false。
+     */
     public void set24HourView(boolean is24HourView) {
         mIs24HourView = is24HourView;
     }
 
+    /**
+     * 设置日期和时间设置监听器。
+     *
+     * @param callBack 要通知的监听器。
+     */
     public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
         mOnDateTimeSetListener = callBack;
     }
 
+    /**
+     * 使用指定的日期更新对话框标题。
+     *
+     * @param date 要显示在标题中的日期。
+     */
     private void updateTitle(long date) {
         int flag =
-            DateUtils.FORMAT_SHOW_YEAR |
+                DateUtils.FORMAT_SHOW_YEAR |
-            DateUtils.FORMAT_SHOW_DATE |
+                        DateUtils.FORMAT_SHOW_DATE |
-            DateUtils.FORMAT_SHOW_TIME;
+                        DateUtils.FORMAT_SHOW_TIME;
         flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR;
+
         setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));
     }
 
+    /**
+     * 处理按钮点击事件。
+     *
+     * @param arg0 接收到点击事件的对话框。
+     * @param arg1 被点击的按钮。
+     */
     public void onClick(DialogInterface arg0, int arg1) {
         if (mOnDateTimeSetListener != null) {
             mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());

src/ui/DropdownMenu.java

@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import android.content.Context;
@@ -26,18 +10,35 @@ import android.widget.PopupMenu;
 import android.widget.PopupMenu.OnMenuItemClickListener;
 
 import net.micode.notes.R;
-
+/**
+ * @Package:        net.micode.notes.ui
+ * @ClassName:      DropdownMenu
+ * @Description:
+ * DropdownMenu是一个自定义下拉菜单控件。
+ * 它使用Button作为触发器，通过PopupMenu显示菜单选项。
+ * 构造函数接收一个上下文环境、一个Button和菜单资源的ID。
+ * 通过setOnDropdownMenuItemClickListener方法设置菜单选项的点击监听器。
+ * 可以通过findItem方法查找特定的菜单选项。
+ * 通过setTitle方法设置下拉菜单的标题
+ * @Author:         YangYizhe
+ * @CreateDate:     12/21/2023 12:36 AM
+ * @Version:        1.0
+ */
 public class DropdownMenu {
     private Button mButton;
     private PopupMenu mPopupMenu;
+    //声明一个下拉菜单
     private Menu mMenu;
 
     public DropdownMenu(Context context, Button button, int menuId) {
         mButton = button;
         mButton.setBackgroundResource(R.drawable.dropdown_icon);
+        //设置这个view的背景
         mPopupMenu = new PopupMenu(context, mButton);
         mMenu = mPopupMenu.getMenu();
         mPopupMenu.getMenuInflater().inflate(menuId, mMenu);
+        //MenuInflater是用来实例化Menu目录下的Menu布局文件
+        //根据ID来确认menu的内容选项
         mButton.setOnClickListener(new OnClickListener() {
             public void onClick(View v) {
                 mPopupMenu.show();
@@ -53,9 +54,9 @@ public class DropdownMenu {
 
     public MenuItem findItem(int id) {
         return mMenu.findItem(id);
-    }
+    }//对于菜单选项的初始化，根据索引搜索菜单需要的选项
 
     public void setTitle(CharSequence title) {
         mButton.setText(title);
-    }
+    }//布局文件，设置标题
 }

src/ui/FoldersListAdapter.java

@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import android.content.Context;
@@ -28,12 +12,28 @@ import net.micode.notes.R;
 import net.micode.notes.data.Notes;
 import net.micode.notes.data.Notes.NoteColumns;
 
-
+/**
+ * @Package:        net.micode.notes.ui
+ * @ClassName:      FoldersListAdapter
+ * @Description:
+ * FoldersListAdapter是一个用于展示便签文件夹的列表适配器。
+ * 它继承了CursorAdapter类，主要负责便签数据库和用户界面的交互。
+ * 通过PROJECTION数组定义了需要从数据库中获取的数据列。
+ * 它通过newView方法创建文件夹视图，并通过bindView方法将布局文件和数据绑定在一起。
+ * getFolderName方法可以根据位置获取对应便签文件夹的名称
+ * @Author:         YangYizhe
+ * @CreateDate:     12/21/2023 12:37 AM
+ * @Version:        1.0
+ */
 public class FoldersListAdapter extends CursorAdapter {
+    //CursorAdapter是Cursor和ListView的接口
+    //FoldersListAdapter继承了CursorAdapter的类
+    //主要作用是便签数据库和用户的交互
+    //这里就是用folder（文件夹）的形式展现给用户
     public static final String [] PROJECTION = {
-        NoteColumns.ID,
+            NoteColumns.ID,
-        NoteColumns.SNIPPET
+            NoteColumns.SNIPPET
-    };
+    };//调用数据库中便签的ID和片段
 
     public static final int ID_COLUMN   = 0;
     public static final int NAME_COLUMN = 1;
@@ -41,12 +41,13 @@ public class FoldersListAdapter extends CursorAdapter {
     public FoldersListAdapter(Context context, Cursor c) {
         super(context, c);
         // TODO Auto-generated constructor stub
-    }
+    }//数据库操作
 
     @Override
     public View newView(Context context, Cursor cursor, ViewGroup parent) {
+        //ViewGroup是容器
         return new FolderListItem(context);
-    }
+    }//创建一个文件夹，对于各文件夹中子标签的初始化
 
     @Override
     public void bindView(View view, Context context, Cursor cursor) {
@@ -55,20 +56,22 @@ public class FoldersListAdapter extends CursorAdapter {
                     .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
             ((FolderListItem) view).bind(folderName);
         }
-    }
+    }//将各个布局文件绑定起来
 
     public String getFolderName(Context context, int position) {
         Cursor cursor = (Cursor) getItem(position);
         return (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
                 .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
-    }
+    }//根据数据库中标签的ID得到标签的各项内容
 
     private class FolderListItem extends LinearLayout {
         private TextView mName;
 
         public FolderListItem(Context context) {
             super(context);
+            //操作数据库
             inflate(context, R.layout.folder_list_item, this);
+            //根据布局文件的名字等信息将其找出来
             mName = (TextView) findViewById(R.id.tv_folder_name);
         }
 

src/ui/NoteEditActivity.java

@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import android.app.Activity;
@@ -71,9 +55,21 @@ import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-
+/**
+ * @Package:        net.micode.notes.ui
+ * @ClassName:      NoteEditActivity
+ * @Description:
+ * 该类主要是针对标签的编辑
+ * 继承了系统内部许多和监听有关的类
+ * @Author:         YangYizhe
+ * @CreateDate:     12/21/2023 12:47 AM
+ * @Version:        1.0
+ */
 public class NoteEditActivity extends Activity implements OnClickListener,
         NoteSettingChangedListener, OnTextViewChangeListener {
+    /**
+     * 类属性的定义
+     */
     private class HeadViewHolder {
         public TextView tvModified;
 
@@ -83,7 +79,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
 
         public ImageView ibSetBgColor;
     }
-
     private static final Map<Integer, Integer> sBgSelectorBtnsMap = new HashMap<Integer, Integer>();
     static {
         sBgSelectorBtnsMap.put(R.id.iv_bg_yellow, ResourceParser.YELLOW);
@@ -119,21 +114,13 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     }
 
     private static final String TAG = "NoteEditActivity";
-
     private HeadViewHolder mNoteHeaderHolder;
-
     private View mHeadViewPanel;
-
     private View mNoteBgColorSelector;
-
     private View mFontSizeSelector;
-
     private EditText mNoteEditor;
-
     private View mNoteEditorPanel;
-
+    public WorkingNote mWorkingNote;
-    private WorkingNote mWorkingNote;
-
     private SharedPreferences mSharedPrefs;
     private int mFontSizeId;
 
@@ -148,12 +135,13 @@ public class NoteEditActivity extends Activity implements OnClickListener,
 
     private String mUserQuery;
     private Pattern mPattern;
-
+    /**
+     *在 Activity 创建时进行一些初始化工作，包括设置布局、初始化状态和资源等操作
+     */
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         this.setContentView(R.layout.note_edit);
-
         if (savedInstanceState == null && !initActivityState(getIntent())) {
             finish();
             return;
@@ -179,6 +167,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
     }
 
+
     private boolean initActivityState(Intent intent) {
         /**
          * If the user specified the {@link Intent#ACTION_VIEW} but not provided with id,
@@ -188,25 +177,29 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         if (TextUtils.equals(Intent.ACTION_VIEW, intent.getAction())) {
             long noteId = intent.getLongExtra(Intent.EXTRA_UID, 0);
             mUserQuery = "";
-
             /**
              * Starting from the searched result
              */
+            //根据键值查找ID
             if (intent.hasExtra(SearchManager.EXTRA_DATA_KEY)) {
                 noteId = Long.parseLong(intent.getStringExtra(SearchManager.EXTRA_DATA_KEY));
                 mUserQuery = intent.getStringExtra(SearchManager.USER_QUERY);
             }
-
+            //如果ID在数据库中未找到
             if (!DataUtils.visibleInNoteDatabase(getContentResolver(), noteId, Notes.TYPE_NOTE)) {
                 Intent jump = new Intent(this, NotesListActivity.class);
                 startActivity(jump);
+                //程序将跳转到上面声明的intent——jump
                 showToast(R.string.error_note_not_exist);
                 finish();
                 return false;
-            } else {
+            }
+            //ID在数据库中找到
+            else {
                 mWorkingNote = WorkingNote.load(this, noteId);
                 if (mWorkingNote == null) {
                     Log.e(TAG, "load note failed with note id" + noteId);
+                    //打印出红色的错误信息
                     finish();
                     return false;
                 }
@@ -215,7 +208,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
                     WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN
                             | WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
         } else if(TextUtils.equals(Intent.ACTION_INSERT_OR_EDIT, intent.getAction())) {
-            // New note
             long folderId = intent.getLongExtra(Notes.INTENT_EXTRA_FOLDER_ID, 0);
             int widgetId = intent.getIntExtra(Notes.INTENT_EXTRA_WIDGET_ID,
                     AppWidgetManager.INVALID_APPWIDGET_ID);
@@ -223,8 +215,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
                     Notes.TYPE_WIDGET_INVALIDE);
             int bgResId = intent.getIntExtra(Notes.INTENT_EXTRA_BACKGROUND_ID,
                     ResourceParser.getDefaultBgId(this));
-
-            // Parse call-record note
             String phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
             long callDate = intent.getLongExtra(Notes.INTENT_EXTRA_CALL_DATE, 0);
             if (callDate != 0 && phoneNumber != null) {
@@ -262,12 +252,14 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         return true;
     }
 
+
     @Override
     protected void onResume() {
         super.onResume();
         initNoteScreen();
     }
 
+
     private void initNoteScreen() {
         mNoteEditor.setTextAppearance(this, TextAppearanceResources
                 .getTexAppearanceResource(mFontSizeId));
@@ -300,7 +292,8 @@ public class NoteEditActivity extends Activity implements OnClickListener,
             long time = System.currentTimeMillis();
             if (time > mWorkingNote.getAlertDate()) {
                 mNoteHeaderHolder.tvAlertDate.setText(R.string.note_alert_expired);
-            } else {
+            }
+            else {
                 mNoteHeaderHolder.tvAlertDate.setText(DateUtils.getRelativeTimeSpanString(
                         mWorkingNote.getAlertDate(), time, DateUtils.MINUTE_IN_MILLIS));
             }
@@ -312,12 +305,12 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         };
     }
 
+
     @Override
     protected void onNewIntent(Intent intent) {
         super.onNewIntent(intent);
         initActivityState(intent);
     }
-
     @Override
     protected void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
@@ -332,7 +325,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         outState.putLong(Intent.EXTRA_UID, mWorkingNote.getNoteId());
         Log.d(TAG, "Save working note id: " + mWorkingNote.getNoteId() + " onSaveInstanceState");
     }
-
     @Override
     public boolean dispatchTouchEvent(MotionEvent ev) {
         if (mNoteBgColorSelector.getVisibility() == View.VISIBLE
@@ -357,9 +349,10 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         if (ev.getX() < x
                 || ev.getX() > (x + view.getWidth())
                 || ev.getY() < y
-                || ev.getY() > (y + view.getHeight())) {
+                || ev.getY() > (y + view.getHeight()))
-                    return false;
+        {
-                }
+            return false;
+        }
         return true;
     }
 
@@ -405,7 +398,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
         clearSettingState();
     }
-
     private void updateWidget() {
         Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
         if (mWorkingNote.getWidgetType() == Notes.TYPE_WIDGET_2X) {
@@ -418,13 +410,14 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
 
         intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] {
-            mWorkingNote.getWidgetId()
+                mWorkingNote.getWidgetId()
         });
 
         sendBroadcast(intent);
         setResult(RESULT_OK, intent);
     }
 
+
     public void onClick(View v) {
         int id = v.getId();
         if (id == R.id.btn_set_bg_color) {
@@ -472,14 +465,12 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
         return false;
     }
-
     public void onBackgroundColorChanged() {
         findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility(
                 View.VISIBLE);
         mNoteEditorPanel.setBackgroundResource(mWorkingNote.getBgColorResId());
         mHeadViewPanel.setBackgroundResource(mWorkingNote.getTitleBgResId());
     }
-
     @Override
     public boolean onPrepareOptionsMenu(Menu menu) {
         if (isFinishing()) {
@@ -504,13 +495,13 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
         return true;
     }
-
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         int itemId = item.getItemId();
         if (itemId == R.id.menu_new_note) {
             createNewNote();
-        } else if (itemId == R.id.menu_delete) {
+        }
+        else if (itemId == R.id.menu_delete) {
             AlertDialog.Builder builder = new AlertDialog.Builder(this);
             builder.setTitle(getString(R.string.alert_title_delete));
             builder.setIcon(android.R.drawable.ic_dialog_alert);
@@ -548,11 +539,13 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         d.setOnDateTimeSetListener(new OnDateTimeSetListener() {
             public void OnDateTimeSet(AlertDialog dialog, long date) {
                 mWorkingNote.setAlertDate(date	, true);
+                //选择提醒的日期
             }
         });
         d.show();
     }
 
+
     /**
      * Share note to apps that support {@link Intent#ACTION_SEND} action
      * and {@text/plain} type
@@ -563,7 +556,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         intent.setType("text/plain");
         context.startActivity(intent);
     }
-
     private void createNewNote() {
         // Firstly, save current editing notes
         saveNote();
@@ -575,7 +567,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         intent.putExtra(Notes.INTENT_EXTRA_FOLDER_ID, mWorkingNote.getFolderId());
         startActivity(intent);
     }
-
     private void deleteCurrentNote() {
         if (mWorkingNote.existInDatabase()) {
             HashSet<Long> ids = new HashSet<Long>();
@@ -597,11 +588,9 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
         mWorkingNote.markDeleted(true);
     }
-
     private boolean isSyncMode() {
         return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0;
     }
-
     public void onClockAlertChanged(long date, boolean set) {
         /**
          * User could set clock to an unsaved note, so before setting the
@@ -631,11 +620,9 @@ public class NoteEditActivity extends Activity implements OnClickListener,
             showToast(R.string.error_note_empty_for_clock);
         }
     }
-
     public void onWidgetChanged() {
         updateWidget();
     }
-
     public void onEditTextDelete(int index, String text) {
         int childCount = mEditTextList.getChildCount();
         if (childCount == 1) {
@@ -661,7 +648,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         edit.requestFocus();
         edit.setSelection(length);
     }
-
     public void onEditTextEnter(int index, String text) {
         /**
          * Should not happen, check for debug
@@ -680,7 +666,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
                     .setIndex(i);
         }
     }
-
     private void switchToListMode(String text) {
         mEditTextList.removeAllViews();
         String[] items = text.split("\n");
@@ -697,7 +682,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         mNoteEditor.setVisibility(View.GONE);
         mEditTextList.setVisibility(View.VISIBLE);
     }
-
     private Spannable getHighlightQueryResult(String fullText, String userQuery) {
         SpannableString spannable = new SpannableString(fullText == null ? "" : fullText);
         if (!TextUtils.isEmpty(userQuery)) {
@@ -714,7 +698,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
         return spannable;
     }
-
     private View getListItem(String item, int index) {
         View view = LayoutInflater.from(this).inflate(R.layout.note_edit_list_item, null);
         final NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
@@ -745,7 +728,6 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         edit.setText(getHighlightQueryResult(item, mUserQuery));
         return view;
     }
-
     public void onTextChange(int index, boolean hasText) {
         if (index >= mEditTextList.getChildCount()) {
             Log.e(TAG, "Wrong index, should not happen");
@@ -761,43 +743,59 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     public void onCheckListModeChanged(int oldMode, int newMode) {
         if (newMode == TextNote.MODE_CHECK_LIST) {
             switchToListMode(mNoteEditor.getText().toString());
+            //检查模式切换到列表模式
         } else {
             if (!getWorkingText()) {
                 mWorkingNote.setWorkingText(mWorkingNote.getContent().replace(TAG_UNCHECKED + " ",
                         ""));
             }
+            //若是获取到文本就改变其检查标记
             mNoteEditor.setText(getHighlightQueryResult(mWorkingNote.getContent(), mUserQuery));
             mEditTextList.setVisibility(View.GONE);
             mNoteEditor.setVisibility(View.VISIBLE);
+            //修改文本编辑器的内容和可见性
         }
     }
-
     private boolean getWorkingText() {
         boolean hasChecked = false;
+        //初始化check标记
         if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {
+            // 若模式为CHECK_LIST
             StringBuilder sb = new StringBuilder();
+            //创建可变字符串
             for (int i = 0; i < mEditTextList.getChildCount(); i++) {
                 View view = mEditTextList.getChildAt(i);
+                //遍历所有子编辑框的视图
                 NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
                 if (!TextUtils.isEmpty(edit.getText())) {
+                    //若文本不为空
                     if (((CheckBox) view.findViewById(R.id.cb_edit_item)).isChecked()) {
+                        //该选项框已打钩
                         sb.append(TAG_CHECKED).append(" ").append(edit.getText()).append("\n");
                         hasChecked = true;
+                        //扩展字符串为已打钩并把标记置true
                     } else {
                         sb.append(TAG_UNCHECKED).append(" ").append(edit.getText()).append("\n");
+                        //扩展字符串添加未打钩
                     }
                 }
             }
             mWorkingNote.setWorkingText(sb.toString());
+            //利用编辑好的字符串设置运行便签的内容
         } else {
             mWorkingNote.setWorkingText(mNoteEditor.getText().toString());
+            // 若不是该模式直接用编辑器中的内容设置运行中标签的内容
         }
         return hasChecked;
     }
-
+    /*
+     * 函数功能：保存便签
+     * 函数实现：如下注释
+     */
     private boolean saveNote() {
         getWorkingText();
         boolean saved = mWorkingNote.saveNote();
+        //运行 getWorkingText()之后保存
         if (saved) {
             /**
              * There are two modes from List view to edit view, open one note,
@@ -806,6 +804,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
              * new node requires to the top of the list. This code
              * {@link #RESULT_OK} is used to identify the create/edit state
              */
+            //如英文注释所说链接RESULT_OK是为了识别保存的2种情况，一是创建后保存，二是修改后保存
             setResult(RESULT_OK);
         }
         return saved;
@@ -845,18 +844,16 @@ public class NoteEditActivity extends Activity implements OnClickListener,
             showToast(R.string.error_note_empty_for_send_to_desktop);
         }
     }
-
     private String makeShortcutIconTitle(String content) {
         content = content.replace(TAG_CHECKED, "");
         content = content.replace(TAG_UNCHECKED, "");
         return content.length() > SHORTCUT_ICON_TITLE_MAX_LEN ? content.substring(0,
                 SHORTCUT_ICON_TITLE_MAX_LEN) : content;
+        //直接设置为content中的内容并返回，有勾选和未勾选2种
     }
-
     private void showToast(int resId) {
         showToast(resId, Toast.LENGTH_SHORT);
     }
-
     private void showToast(int resId, int duration) {
         Toast.makeText(this, resId, duration).show();
     }

src/ui/NoteEditText.java

@@ -37,15 +37,28 @@ import net.micode.notes.R;
 import java.util.HashMap;
 import java.util.Map;
 
+/**
+ * @Package:        net.micode.notes.ui
+ * @ClassName:      NoteEditText
+ * @Description:    
+ * @Author:         YangYizhe
+ * @CreateDate:     12/21/2023 12:38 AM
+ * @Version:        1.0
+ */
 public class NoteEditText extends EditText {
+    //常量标识
     private static final String TAG = "NoteEditText";
+    //声明整型变量，文本索引
     private int mIndex;
+    //声明整型变量
     private int mSelectionStartBeforeDelete;
 
+    //声明字符串常量，标志电话、网址、邮件
     private static final String SCHEME_TEL = "tel:" ;
     private static final String SCHEME_HTTP = "http:" ;
     private static final String SCHEME_EMAIL = "mailto:" ;
 
+    //设置映射，将文本内容（电话、网址、邮件）做链接处理
     private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>();
     static {
         sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel);
@@ -55,50 +68,75 @@ public class NoteEditText extends EditText {
 
     /**
      * Call by the {@link NoteEditActivity} to delete or add edit text
+     * 该接口用于实现对TextView组件中的文字信息进行修改
      */
     public interface OnTextViewChangeListener {
         /**
          * Delete current edit text when {@link KeyEvent#KEYCODE_DEL} happens
          * and the text is null
+         * 当delete键按下时删除当前编辑的文字块
          */
         void onEditTextDelete(int index, String text);
 
         /**
          * Add edit text after current edit text when {@link KeyEvent#KEYCODE_ENTER}
          * happen
+         * 当enter键按下时添加一个文字编辑块
          */
         void onEditTextEnter(int index, String text);
 
         /**
          * Hide or show item option when text change
+         * 当文字发生变化时隐藏或者显示设置
          */
         void onTextChange(int index, boolean hasText);
     }
 
+    //声明文本视图变化监听器
     private OnTextViewChangeListener mOnTextViewChangeListener;
 
+    /**
+     * 构造方法，实例化NoteEditText
+     */
     public NoteEditText(Context context) {
         super(context, null);
         mIndex = 0;
     }
 
+    //设置索引号
     public void setIndex(int index) {
         mIndex = index;
     }
 
-    public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
+    /**
+     * 设置文本视图变化监听器
+    */
+     public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
         mOnTextViewChangeListener = listener;
     }
 
-    public NoteEditText(Context context, AttributeSet attrs) {
+    /**
+     * 构造方法，是由参数集（文本编辑风格）实例化NoteEditText
+    */
+     public NoteEditText(Context context, AttributeSet attrs) {
         super(context, attrs, android.R.attr.editTextStyle);
     }
-
+    /**
-    public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
+     * 构造方法，是由参数集（文本编辑风格、定义风格）实例化NoteEditText
+    */
+     public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
         // TODO Auto-generated constructor stub
     }
 
+    /**
+     * @method  onTouchEvent
+     * @description 处理触摸事件，根据触摸点的位置设置光标的位置
+     * @date: 12/21/2023 12:41 AM
+     * @author: YangYizhe
+     * @param 
+     * @return 
+     */
     @Override
     public boolean onTouchEvent(MotionEvent event) {
         switch (event.getAction()) {
@@ -110,17 +148,23 @@ public class NoteEditText extends EditText {
                 y -= getTotalPaddingTop();
                 x += getScrollX();
                 y += getScrollY();
-
                 Layout layout = getLayout();
                 int line = layout.getLineForVertical(y);
                 int off = layout.getOffsetForHorizontal(line, x);
                 Selection.setSelection(getText(), off);
                 break;
         }
-
         return super.onTouchEvent(event);
     }
-
+    /**
+     * @method  onKeyDown
+     * @description 监听键盘按键按下
+     * @date: 12/21/2023 12:40 AM
+     * @author: YangYizhe
+     * @param keyCode 键盘按键的编码
+     * @param event 按键事件
+     * @return boolean
+     */
     @Override
     public boolean onKeyDown(int keyCode, KeyEvent event) {
         switch (keyCode) {
@@ -138,6 +182,14 @@ public class NoteEditText extends EditText {
         return super.onKeyDown(keyCode, event);
     }
 
+    /**
+     * @method  onKeyUp
+     * @description 监听按键抬起
+     * @date: 12/21/2023 12:39 AM
+     * @author: YangYizhe
+     * @param keyCode
+     * @param event
+     */
     @Override
     public boolean onKeyUp(int keyCode, KeyEvent event) {
         switch(keyCode) {
@@ -167,6 +219,15 @@ public class NoteEditText extends EditText {
         return super.onKeyUp(keyCode, event);
     }
 
+    /**
+     * @method  onFocusChanged
+     * @description 处理当前视图下的焦点改变事件
+     * @date: 12/21/2023 12:39 AM
+     * @author: YangYizhe
+     * @param focused 代表获得或失去焦点
+     * @param direction
+     * @param previouslyFocusedRect 上一个访问的焦点区域
+     */
     @Override
     protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
         if (mOnTextViewChangeListener != null) {
@@ -179,6 +240,14 @@ public class NoteEditText extends EditText {
         super.onFocusChanged(focused, direction, previouslyFocusedRect);
     }
 
+    /**
+     * @method  onCreateContextMenu
+     * @description 
+     * @date: 12/21/2023 12:39 AM
+     * @author: YangYizhe
+     * @param 
+     * @return 
+     */
     @Override
     protected void onCreateContextMenu(ContextMenu menu) {
         if (getText() instanceof Spanned) {
@@ -201,7 +270,6 @@ public class NoteEditText extends EditText {
                 if (defaultResId == 0) {
                     defaultResId = R.string.note_link_other;
                 }
-
                 menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener(
                         new OnMenuItemClickListener() {
                             public boolean onMenuItemClick(MenuItem item) {

src/ui/NotesListActivity.java

@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import android.app.Activity;
@@ -77,8 +61,12 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.util.HashSet;
-
+//主界面，一进入就是这个界面
-public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {
+/**
+ * @author k
+ *
+ */
+public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {   //没有用特定的标签加注释。。。感觉没有什么用
     private static final int FOLDER_NOTE_LIST_QUERY_TOKEN = 0;
 
     private static final int FOLDER_LIST_QUERY_TOKEN      = 1;
@@ -89,7 +77,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
 
     private static final int MENU_FOLDER_CHANGE_NAME = 2;
 
-    private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction";
+    private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction";  //单行超过80个字符
 
     private enum ListEditState {
         NOTE_LIST, SUB_FOLDER, CALL_RECORD_FOLDER
@@ -136,8 +124,20 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     private final static int REQUEST_CODE_NEW_NODE  = 103;
 
     @Override
-    protected void onCreate(Bundle savedInstanceState) {
+    /**
-        super.onCreate(savedInstanceState);
+     * @method  onCreate
+     * @description 
+     * @date:  9:58 AM
+     * @author: YangYizhe
+     * @param [savedInstanceState]
+     * @return void
+     */
+    protected void onCreate(final Bundle savedInstanceState) {  //需要是final类型   根据程序上下文环境，Java关键字final有“这是无法改变的”或者“终态的”含义，它可以修饰非抽象类、非抽象类成员方法和变量。你可能出于两种理解而需要阻止改变：设计或效率。
+        // final类不能被继承，没有子类，final类中的方法默认是final的。
+        //final方法不能被子类的方法覆盖，但可以被继承。
+        //final成员变量表示常量，只能被赋值一次，赋值后值不再改变。
+        //final不能用于修饰构造方法。
+        super.onCreate(savedInstanceState); // 调用父类的onCreate函数
         setContentView(R.layout.note_list);
         initResources();
 
@@ -148,26 +148,32 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     }
 
     @Override
+    // 返回一些子模块完成的数据交给主Activity处理
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        // 结果值 和 要求值 符合要求 
         if (resultCode == RESULT_OK
                 && (requestCode == REQUEST_CODE_OPEN_NODE || requestCode == REQUEST_CODE_NEW_NODE)) {
             mNotesListAdapter.changeCursor(null);
         } else {
             super.onActivityResult(requestCode, resultCode, data);
+            // 调用 Activity 的onActivityResult（）
         }
     }
 
     private void setAppInfoFromRawRes() {
+        // Android平台给我们提供了一个SharedPreferences类，它是一个轻量级的存储类，特别适合用于保存软件配置参数。
         SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
         if (!sp.getBoolean(PREFERENCE_ADD_INTRODUCTION, false)) {
             StringBuilder sb = new StringBuilder();
             InputStream in = null;
             try {
-                 in = getResources().openRawResource(R.raw.introduction);
+                // 把资源文件放到应用程序的/raw/raw下，那么就可以在应用中使用getResources获取资源后,
+                // 以openRawResource方法（不带后缀的资源文件名）打开这个文件。
+                in = getResources().openRawResource(R.raw.introduction);
                 if (in != null) {
                     InputStreamReader isr = new InputStreamReader(in);
                     BufferedReader br = new BufferedReader(isr);
-                    char [] buf = new char[1024];
+                    char [] buf = new char[1024];  // 自行定义的数值，使用者不知道有什么意义
                     int len = 0;
                     while ((len = br.read(buf)) > 0) {
                         sb.append(buf, 0, len);
@@ -180,7 +186,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 e.printStackTrace();
                 return;
             } finally {
-                if(in != null) {
+                if (in != null) {
                     try {
                         in.close();
                     } catch (IOException e) {
@@ -190,11 +196,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 }
             }
 
+            // 创建空的WorkingNote
             WorkingNote note = WorkingNote.createEmptyNote(this, Notes.ID_ROOT_FOLDER,
                     AppWidgetManager.INVALID_APPWIDGET_ID, Notes.TYPE_WIDGET_INVALIDE,
                     ResourceParser.RED);
             note.setWorkingText(sb.toString());
             if (note.saveNote()) {
+                // 更新保存note的信息
                 sp.edit().putBoolean(PREFERENCE_ADD_INTRODUCTION, true).commit();
             } else {
                 Log.e(TAG, "Save introduction note error");
@@ -209,18 +217,21 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         startAsyncNotesListQuery();
     }
 
+    // 初始化资源
     private void initResources() {
-        mContentResolver = this.getContentResolver();
+        mContentResolver = this.getContentResolver(); // 获取应用程序的数据，得到类似数据表的东西
         mBackgroundQueryHandler = new BackgroundQueryHandler(this.getContentResolver());
         mCurrentFolderId = Notes.ID_ROOT_FOLDER;
-        mNotesListView = (ListView) findViewById(R.id.notes_list);
+
+        // findViewById 是安卓编程的定位函数，主要是引用.R文件里的引用名
+        mNotesListView = (ListView) findViewById(R.id.notes_list); // 绑定XML中的ListView，作为Item的容器
         mNotesListView.addFooterView(LayoutInflater.from(this).inflate(R.layout.note_list_footer, null),
                 null, false);
         mNotesListView.setOnItemClickListener(new OnListItemClickListener());
         mNotesListView.setOnItemLongClickListener(this);
         mNotesListAdapter = new NotesListAdapter(this);
         mNotesListView.setAdapter(mNotesListAdapter);
-        mAddNewNote = (Button) findViewById(R.id.btn_new_note);
+        mAddNewNote = (Button) findViewById(R.id.btn_new_note);// 在activity中要获取该按钮
         mAddNewNote.setOnClickListener(this);
         mAddNewNote.setOnTouchListener(new NewNoteOnTouchListener());
         mDispatch = false;
@@ -231,6 +242,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         mModeCallBack = new ModeCallback();
     }
 
+    // 继承自ListView.MultiChoiceModeListener 和 OnMenuItemClickListener
     private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener {
         private DropdownMenu mDropDownMenu;
         private ActionMode mActionMode;
@@ -259,7 +271,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     (Button) customView.findViewById(R.id.selection_menu),
                     R.menu.note_list_dropdown);
             mDropDownMenu.setOnDropdownMenuItemClickListener(new PopupMenu.OnMenuItemClickListener(){
-                public boolean onMenuItemClick(MenuItem item) {
+                public boolean onMenuItemClick(final MenuItem item) {
                     mNotesListAdapter.selectAll(!mNotesListAdapter.isAllSelected());
                     updateMenu();
                     return true;
@@ -269,11 +281,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             return true;
         }
 
+        // 更新菜单
         private void updateMenu() {
             int selectedCount = mNotesListAdapter.getSelectedCount();
             // Update dropdown menu
             String format = getResources().getString(R.string.menu_select_title, selectedCount);
-            mDropDownMenu.setTitle(format);
+            mDropDownMenu.setTitle(format); // 更改标题
             MenuItem item = mDropDownMenu.findItem(R.id.action_select_all);
             if (item != null) {
                 if (mNotesListAdapter.isAllSelected()) {
@@ -307,7 +320,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
 
         public void onItemCheckedStateChanged(ActionMode mode, int position, long id,
-                boolean checked) {
+                                              boolean checked) {
             mNotesListAdapter.setCheckedItem(position, checked);
             updateMenu();
         }
@@ -347,52 +360,58 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     private class NewNoteOnTouchListener implements OnTouchListener {
 
         public boolean onTouch(View v, MotionEvent event) {
-            int action = event.getAction();
+            switch (event.getAction()) {
-            if (action == MotionEvent.ACTION_DOWN) {
+                case MotionEvent.ACTION_DOWN: {
-                Display display = getWindowManager().getDefaultDisplay();
+                    Display display = getWindowManager().getDefaultDisplay();
-                int screenHeight = display.getHeight();
+                    int screenHeight = display.getHeight();
-                int newNoteViewHeight = mAddNewNote.getHeight();
+                    int newNoteViewHeight = mAddNewNote.getHeight();
-                int start = screenHeight - newNoteViewHeight;
+                    int start = screenHeight - newNoteViewHeight;
-                int eventY = start + (int) event.getY();
+                    int eventY = start + (int) event.getY();
-                /**
+                    /**
-                 * Minus TitleBar's height
+                     * Minus TitleBar's height
-                 */
+                     */
-                if (mState == ListEditState.SUB_FOLDER) {
+                    if (mState == ListEditState.SUB_FOLDER) {
-                    eventY -= mTitleBar.getHeight();
+                        eventY -= mTitleBar.getHeight();
-                    start -= mTitleBar.getHeight();
+                        start -= mTitleBar.getHeight();
+                    }
+                    /**
+                     * HACKME:When click the transparent part of "New Note" button, dispatch
+                     * the event to the list view behind this button. The transparent part of
+                     * "New Note" button could be expressed by formula y=-0.12x+94锛圲nit:pixel锛<EFBFBD>
+                     * and the line top of the button. The coordinate based on left of the "New
+                     * Note" button. The 94 represents maximum height of the transparent part.
+                     * Notice that, if the background of the button changes, the formula should
+                     * also change. This is very bad, just for the UI designer's strong requirement.
+                     */
+                    if (event.getY() < (event.getX() * (-0.12) + 94)) {
+                        View view = mNotesListView.getChildAt(mNotesListView.getChildCount() - 1
+                                - mNotesListView.getFooterViewsCount());
+                        if (view != null && view.getBottom() > start
+                                && (view.getTop() < (start + 94))) {
+                            mOriginY = (int) event.getY();
+                            mDispatchY = eventY;
+                            event.setLocation(event.getX(), mDispatchY);
+                            mDispatch = true;
+                            return mNotesListView.dispatchTouchEvent(event);
+                        }
+                    }
+                    break;
                 }
-                /**
+                case MotionEvent.ACTION_MOVE: {
-                 * HACKME:When click the transparent part of "New Note" button, dispatch
+                    if (mDispatch) {
-                 * the event to the list view behind this button. The transparent part of
+                        mDispatchY += (int) event.getY() - mOriginY;
-                 * "New Note" button could be expressed by formula y=-0.12x+94（Unit:pixel）
-                 * and the line top of the button. The coordinate based on left of the "New
-                 * Note" button. The 94 represents maximum height of the transparent part.
-                 * Notice that, if the background of the button changes, the formula should
-                 * also change. This is very bad, just for the UI designer's strong requirement.
-                 */
-                if (event.getY() < (event.getX() * (-0.12) + 94)) {
-                    View view = mNotesListView.getChildAt(mNotesListView.getChildCount() - 1
-                            - mNotesListView.getFooterViewsCount());
-                    if (view != null && view.getBottom() > start
-                            && (view.getTop() < (start + 94))) {
-                        mOriginY = (int) event.getY();
-                        mDispatchY = eventY;
                         event.setLocation(event.getX(), mDispatchY);
-                        mDispatch = true;
                         return mNotesListView.dispatchTouchEvent(event);
                     }
+                    break;
                 }
-            } else if (action == MotionEvent.ACTION_MOVE) {
+                default: {
-                if (mDispatch) {
+                    if (mDispatch) {
-                    mDispatchY += (int) event.getY() - mOriginY;
+                        event.setLocation(event.getX(), mDispatchY);
-                    event.setLocation(event.getX(), mDispatchY);
+                        mDispatch = false;
-                    return mNotesListView.dispatchTouchEvent(event);
+                        return mNotesListView.dispatchTouchEvent(event);
-                }
+                    }
-            } else {
+                    break;
-                if (mDispatch) {
-                    event.setLocation(event.getX(), mDispatchY);
-                    mDispatch = false;
-                    return mNotesListView.dispatchTouchEvent(event);
                 }
             }
             return false;
@@ -405,7 +424,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 : NORMAL_SELECTION;
         mBackgroundQueryHandler.startQuery(FOLDER_NOTE_LIST_QUERY_TOKEN, null,
                 Notes.CONTENT_NOTE_URI, NoteItemData.PROJECTION, selection, new String[] {
-                    String.valueOf(mCurrentFolderId)
+                        String.valueOf(mCurrentFolderId)
                 }, NoteColumns.TYPE + " DESC," + NoteColumns.MODIFIED_DATE + " DESC");
     }
 
@@ -612,7 +631,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                         values.put(NoteColumns.LOCAL_MODIFIED, 1);
                         mContentResolver.update(Notes.CONTENT_NOTE_URI, values, NoteColumns.ID
                                 + "=?", new String[] {
-                            String.valueOf(mFocusNoteDataItem.getId())
+                                String.valueOf(mFocusNoteDataItem.getId())
                         });
                     }
                 } else if (!TextUtils.isEmpty(name)) {
@@ -652,30 +671,38 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         });
     }
 
+    /* (non-Javadoc)
+     * @see android.app.Activity#onBackPressed()
+     * 按返回键时根据情况更改类中的数据
+     */
     @Override
-    public void onBackPressed() {
+    public void onBackPressed() { switch (mState) {
-        switch (mState) {
+        case SUB_FOLDER:
-            case SUB_FOLDER:
+            mCurrentFolderId = Notes.ID_ROOT_FOLDER;
-                mCurrentFolderId = Notes.ID_ROOT_FOLDER;
+            mState = ListEditState.NOTE_LIST;
-                mState = ListEditState.NOTE_LIST;
+            startAsyncNotesListQuery();
-                startAsyncNotesListQuery();
+            mTitleBar.setVisibility(View.GONE);
-                mTitleBar.setVisibility(View.GONE);
+            break;
-                break;
+        case CALL_RECORD_FOLDER:
-            case CALL_RECORD_FOLDER:
+            mCurrentFolderId = Notes.ID_ROOT_FOLDER;
-                mCurrentFolderId = Notes.ID_ROOT_FOLDER;
+            mState = ListEditState.NOTE_LIST;
-                mState = ListEditState.NOTE_LIST;
+            mAddNewNote.setVisibility(View.VISIBLE);
-                mAddNewNote.setVisibility(View.VISIBLE);
+            mTitleBar.setVisibility(View.GONE);
-                mTitleBar.setVisibility(View.GONE);
+            startAsyncNotesListQuery();
-                startAsyncNotesListQuery();
+            break;
-                break;
+        case NOTE_LIST:
-            case NOTE_LIST:
+            super.onBackPressed();
-                super.onBackPressed();
+            break;
-                break;
+        default:
-            default:
+            break;
-                break;
+    }
-        }
     }
 
+    /**
+     * @param appWidgetId
+     * @param appWidgetType
+     * 根据不同类型的widget更新插件，通过intent传送数据
+     */
     private void updateWidget(int appWidgetId, int appWidgetType) {
         Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
         if (appWidgetType == Notes.TYPE_WIDGET_2X) {
@@ -688,13 +715,16 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
 
         intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] {
-            appWidgetId
+                appWidgetId
         });
 
         sendBroadcast(intent);
         setResult(RESULT_OK, intent);
     }
 
+    /**
+     * 声明监听器，建立菜单，包括名称，视图，删除操作，更改名称操作；
+     */
     private final OnCreateContextMenuListener mFolderOnCreateContextMenuListener = new OnCreateContextMenuListener() {
         public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
             if (mFocusNoteDataItem != null) {
@@ -714,6 +744,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         super.onContextMenuClosed(menu);
     }
 
+    /* (non-Javadoc)
+     * @see android.app.Activity#onContextItemSelected(android.view.MenuItem)
+     * 针对menu中不同的选择进行不同的处理，里面详细注释
+     */
     @Override
     public boolean onContextItemSelected(MenuItem item) {
         if (mFocusNoteDataItem == null) {
@@ -722,10 +756,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
         switch (item.getItemId()) {
             case MENU_FOLDER_VIEW:
-                openFolder(mFocusNoteDataItem);
+                openFolder(mFocusNoteDataItem);//打开对应文件
                 break;
             case MENU_FOLDER_DELETE:
-                AlertDialog.Builder builder = new AlertDialog.Builder(this);
+                AlertDialog.Builder builder = new AlertDialog.Builder(this);//设置确认是否删除的对话框
                 builder.setTitle(getString(R.string.alert_title_delete));
                 builder.setIcon(android.R.drawable.ic_dialog_alert);
                 builder.setMessage(getString(R.string.alert_message_delete_folder));
@@ -736,7 +770,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                             }
                         });
                 builder.setNegativeButton(android.R.string.cancel, null);
-                builder.show();
+                builder.show();//显示对话框
                 break;
             case MENU_FOLDER_CHANGE_NAME:
                 showCreateOrModifyFolderDialog(false);
@@ -793,12 +827,19 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         return true;
     }
 
+    /* (non-Javadoc)
+     * @see android.app.Activity#onSearchRequested()
+     * 直接调用startSearch函数
+     */
     @Override
     public boolean onSearchRequested() {
         startSearch(null, false, null /* appData */, false);
         return true;
     }
 
+    /**
+     * 函数功能：实现将便签导出到文本功能
+     */
     private void exportNoteToText() {
         final BackupUtils backup = BackupUtils.getInstance(NotesListActivity.this);
         new AsyncTask<Void, Void, Integer>() {
@@ -841,16 +882,27 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }.execute();
     }
 
+    /**
+     * @return
+     * 功能：判断是否正在同步
+     */
     private boolean isSyncMode() {
         return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0;
     }
 
+    /**
+     * 功能：跳转到PreferenceActivity界面
+     */
     private void startPreferenceActivity() {
         Activity from = getParent() != null ? getParent() : this;
         Intent intent = new Intent(from, NotesPreferenceActivity.class);
         from.startActivityIfNeeded(intent, -1);
     }
 
+    /**
+     * @author k
+     * 函数功能：实现对便签列表项的点击事件（短按）
+     */
     private class OnListItemClickListener implements OnItemClickListener {
 
         public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
@@ -892,10 +944,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
 
     }
 
+    /**
+     * 查询目标文件
+     */
     private void startQueryDestinationFolders() {
         String selection = NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>? AND " + NoteColumns.ID + "<>?";
         selection = (mState == ListEditState.NOTE_LIST) ? selection:
-            "(" + selection + ") OR (" + NoteColumns.ID + "=" + Notes.ID_ROOT_FOLDER + ")";
+                "(" + selection + ") OR (" + NoteColumns.ID + "=" + Notes.ID_ROOT_FOLDER + ")";
 
         mBackgroundQueryHandler.startQuery(FOLDER_LIST_QUERY_TOKEN,
                 null,
@@ -910,6 +965,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 NoteColumns.MODIFIED_DATE + " DESC");
     }
 
+    /* (non-Javadoc)
+     * @see android.widget.AdapterView.OnItemLongClickListener#onItemLongClick(android.widget.AdapterView, android.view.View, int, long)
+     * 长按某一项时进行的操作
+     * 如果长按的是便签，则通过ActionMode菜单实现；如果长按的是文件夹，则通过ContextMenu菜单实现；
+     *        具体ActionMOde菜单和ContextMenu菜单的详细见精度笔记
+     */
     public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
         if (view instanceof NotesListItem) {
             mFocusNoteDataItem = ((NotesListItem) view).getItemData();

src/ui/NotesListAdapter.java

@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import android.content.Context;
@@ -23,6 +7,7 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.CursorAdapter;
 
+
 import net.micode.notes.data.Notes;
 
 import java.util.Collection;
@@ -31,55 +16,94 @@ import java.util.HashSet;
 import java.util.Iterator;
 
 
+/*
+ * 功能：直译为便签表连接器，继承了CursorAdapter，它为cursor和ListView提供了连接的桥梁。
+ *     所以NotesListAdapter实现的是鼠标和编辑便签链接的桥梁
+ */
 public class NotesListAdapter extends CursorAdapter {
     private static final String TAG = "NotesListAdapter";
     private Context mContext;
     private HashMap<Integer, Boolean> mSelectedIndex;
-    private int mNotesCount;
+    private int mNotesCount;    //便签数
-    private boolean mChoiceMode;
+    private boolean mChoiceMode;   //选择模式标记
 
+    /*
+     * 桌面widget的属性，包括编号和类型
+     */
     public static class AppWidgetAttribute {
         public int widgetId;
         public int widgetType;
     };
 
+    /*
+     * 函数功能：初始化便签链接器
+     * 函数实现：根据传进来的内容设置相关变量
+     */
     public NotesListAdapter(Context context) {
-        super(context, null);
+        super(context, null);  //父类对象置空
-        mSelectedIndex = new HashMap<Integer, Boolean>();
+        mSelectedIndex = new HashMap<Integer, Boolean>();  //新建选项下标的hash表
         mContext = context;
         mNotesCount = 0;
     }
 
     @Override
+    /*
+     * 函数功能：新建一个视图来存储光标所指向的数据
+     * 函数实现：使用兄弟类NotesListItem新建一个项目选项
+     */
     public View newView(Context context, Cursor cursor, ViewGroup parent) {
         return new NotesListItem(context);
     }
 
+    /*
+     * 函数功能：将已经存在的视图和鼠标指向的数据进行捆绑
+     * 函数实现：如下注释
+     */
     @Override
     public void bindView(View view, Context context, Cursor cursor) {
         if (view instanceof NotesListItem) {
+            //若view是NotesListItem的一个实例
             NoteItemData itemData = new NoteItemData(context, cursor);
             ((NotesListItem) view).bind(context, itemData, mChoiceMode,
                     isSelectedItem(cursor.getPosition()));
+            //则新建一个项目选项并且用bind跟将view和鼠标，内容，便签数据捆绑在一起
         }
     }
 
+    /*
+     * 函数功能：设置勾选框
+     * 函数实现：如下注释
+     */
     public void setCheckedItem(final int position, final boolean checked) {
         mSelectedIndex.put(position, checked);
+        //根据定位和是否勾选设置下标
         notifyDataSetChanged();
+        //在修改后刷新activity
     }
 
+    /*
+     * 函数功能：判断单选按钮是否勾选
+     */
     public boolean isInChoiceMode() {
         return mChoiceMode;
     }
 
+    /*
+     * 函数功能：设置单项选项框
+     * 函数实现：重置下标并且根据参数mode设置选项
+     */
     public void setChoiceMode(boolean mode) {
         mSelectedIndex.clear();
         mChoiceMode = mode;
     }
 
+    /*
+     * 函数功能：选择全部选项
+     * 函数实现：如下注释
+     */
     public void selectAll(boolean checked) {
         Cursor cursor = getCursor();
+        //获取光标位置
         for (int i = 0; i < getCount(); i++) {
             if (cursor.moveToPosition(i)) {
                 if (NoteItemData.getNoteType(cursor) == Notes.TYPE_NOTE) {
@@ -87,30 +111,47 @@ public class NotesListAdapter extends CursorAdapter {
                 }
             }
         }
+        //遍历所有光标可用的位置在判断为便签类型之后勾选单项框
     }
 
+    /*
+     * 函数功能：建立选择项的下标列表
+     * 函数实现：如下注释
+     */
     public HashSet<Long> getSelectedItemIds() {
         HashSet<Long> itemSet = new HashSet<Long>();
+        //建立hash表
         for (Integer position : mSelectedIndex.keySet()) {
+            //遍历所有的关键
             if (mSelectedIndex.get(position) == true) {
+                //若光标位置可用
                 Long id = getItemId(position);
                 if (id == Notes.ID_ROOT_FOLDER) {
+                    //原文件不需要添加
                     Log.d(TAG, "Wrong item id, should not happen");
                 } else {
                     itemSet.add(id);
                 }
+                //则将id该下标假如选项集合中
+
             }
         }
 
         return itemSet;
     }
 
+    /*
+     * 函数功能：建立桌面Widget的选项表
+     * 函数实现：如下注释
+     */
     public HashSet<AppWidgetAttribute> getSelectedWidget() {
         HashSet<AppWidgetAttribute> itemSet = new HashSet<AppWidgetAttribute>();
         for (Integer position : mSelectedIndex.keySet()) {
             if (mSelectedIndex.get(position) == true) {
                 Cursor c = (Cursor) getItem(position);
+                //以上4句和getSelectedItemIds一样，不再重复
                 if (c != null) {
+                    //光标位置可用的话就建立新的Widget属性并编辑下标和类型，最后添加到选项集中
                     AppWidgetAttribute widget = new AppWidgetAttribute();
                     NoteItemData item = new NoteItemData(mContext, c);
                     widget.widgetId = item.getWidgetId();
@@ -128,26 +169,42 @@ public class NotesListAdapter extends CursorAdapter {
         return itemSet;
     }
 
+    /*
+     * 函数功能：获取选项个数
+     * 函数实现：如下注释
+     */
     public int getSelectedCount() {
         Collection<Boolean> values = mSelectedIndex.values();
+        //首先获取选项下标的值
         if (null == values) {
             return 0;
         }
         Iterator<Boolean> iter = values.iterator();
+        //初始化叠加器
         int count = 0;
         while (iter.hasNext()) {
             if (true == iter.next()) {
+                //若value值为真计数+1
                 count++;
             }
         }
         return count;
     }
 
+    /*
+     * 函数功能：判断是否全部选中
+     * 函数实现：如下注释
+     */
     public boolean isAllSelected() {
         int checkedCount = getSelectedCount();
         return (checkedCount != 0 && checkedCount == mNotesCount);
+        //获取选项数看是否等于便签的个数
     }
 
+    /*
+     * 函数功能：判断是否为选项表
+     * 函数实现：通过传递的下标来确定
+     */
     public boolean isSelectedItem(final int position) {
         if (null == mSelectedIndex.get(position)) {
             return false;
@@ -156,29 +213,45 @@ public class NotesListAdapter extends CursorAdapter {
     }
 
     @Override
+    /*
+     * 函数功能：在activity内容发生局部变动的时候回调该函数计算便签的数量
+     * 函数实现：如下注释
+     */
     protected void onContentChanged() {
         super.onContentChanged();
+        //执行基类函数
         calcNotesCount();
     }
 
     @Override
+    /*
+     * 函数功能：在activity光标发生局部变动的时候回调该函数计算便签的数量
+     */
     public void changeCursor(Cursor cursor) {
         super.changeCursor(cursor);
+        //执行基类函数
         calcNotesCount();
     }
 
+    /*
+     * 函数功能：计算便签数量
+     *
+     */
     private void calcNotesCount() {
         mNotesCount = 0;
         for (int i = 0; i < getCount(); i++) {
+            //获取总数同时遍历
             Cursor c = (Cursor) getItem(i);
             if (c != null) {
                 if (NoteItemData.getNoteType(c) == Notes.TYPE_NOTE) {
                     mNotesCount++;
+                    //若该位置不为空并且文本类型为便签就+1
                 }
             } else {
                 Log.e(TAG, "Invalid cursor");
                 return;
             }
+            //否则报错
         }
     }
 }

src/ui/NotesListItem.java

@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import android.content.Context;
@@ -30,37 +14,43 @@ import net.micode.notes.tool.DataUtils;
 import net.micode.notes.tool.ResourceParser.NoteItemBgResources;
 
 
+//创建便签列表项目选项
 public class NotesListItem extends LinearLayout {
-    private ImageView mAlert;
+    private ImageView mAlert;//闹钟图片
-    private TextView mTitle;
+    private TextView mTitle;  //标题
-    private TextView mTime;
+    private TextView mTime;   //时间
-    private TextView mCallName;
+    private TextView mCallName;    //
-    private NoteItemData mItemData;
+    private NoteItemData mItemData; //标签数据
-    private CheckBox mCheckBox;
+    private CheckBox mCheckBox;    //打钩框
 
+    /*初始化基本信息*/
     public NotesListItem(Context context) {
-        super(context);
+        super(context);   //super()它的主要作用是调整调用父类构造函数的顺序
-        inflate(context, R.layout.note_item, this);
+        inflate(context, R.layout.note_item, this);//Inflate可用于将一个xml中定义的布局控件找出来,这里的xml是r。layout
+        //findViewById用于从contentView中查找指定ID的View，转换出来的形式根据需要而定;
         mAlert = (ImageView) findViewById(R.id.iv_alert_icon);
         mTitle = (TextView) findViewById(R.id.tv_title);
         mTime = (TextView) findViewById(R.id.tv_time);
         mCallName = (TextView) findViewById(R.id.tv_name);
         mCheckBox = (CheckBox) findViewById(android.R.id.checkbox);
     }
-
+    ///根据data的属性对各个控件的属性的控制，主要是可见性Visibility，内容setText，格式setTextAppearance
     public void bind(Context context, NoteItemData data, boolean choiceMode, boolean checked) {
         if (choiceMode && data.getType() == Notes.TYPE_NOTE) {
-            mCheckBox.setVisibility(View.VISIBLE);
+            mCheckBox.setVisibility(View.VISIBLE);  ///设置可见行为可见
-            mCheckBox.setChecked(checked);
+            mCheckBox.setChecked(checked);         ///格子打钩
         } else {
             mCheckBox.setVisibility(View.GONE);
         }
 
         mItemData = data;
+        ///设置控件属性，一共三种情况，由data的id和父id是否与保存到文件夹的id一致来决定
         if (data.getId() == Notes.ID_CALL_RECORD_FOLDER) {
             mCallName.setVisibility(View.GONE);
             mAlert.setVisibility(View.VISIBLE);
+            //设置该textview的style
             mTitle.setTextAppearance(context, R.style.TextAppearancePrimaryItem);
+            //settext为设置内容
             mTitle.setText(context.getString(R.string.call_record_folder_name)
                     + context.getString(R.string.format_folder_files_count, data.getNotesCount()));
             mAlert.setImageResource(R.drawable.call_record);
@@ -69,8 +59,9 @@ public class NotesListItem extends LinearLayout {
             mCallName.setText(data.getCallName());
             mTitle.setTextAppearance(context,R.style.TextAppearanceSecondaryItem);
             mTitle.setText(DataUtils.getFormattedSnippet(data.getSnippet()));
+            ///关于闹钟的设置
             if (data.hasAlert()) {
-                mAlert.setImageResource(R.drawable.clock);
+                mAlert.setImageResource(R.drawable.clock);//图片来源的设置
                 mAlert.setVisibility(View.VISIBLE);
             } else {
                 mAlert.setVisibility(View.GONE);
@@ -78,44 +69,47 @@ public class NotesListItem extends LinearLayout {
         } else {
             mCallName.setVisibility(View.GONE);
             mTitle.setTextAppearance(context, R.style.TextAppearancePrimaryItem);
-
+            ///设置title格式
             if (data.getType() == Notes.TYPE_FOLDER) {
                 mTitle.setText(data.getSnippet()
                         + context.getString(R.string.format_folder_files_count,
-                                data.getNotesCount()));
+                        data.getNotesCount()));
                 mAlert.setVisibility(View.GONE);
             } else {
                 mTitle.setText(DataUtils.getFormattedSnippet(data.getSnippet()));
                 if (data.hasAlert()) {
-                    mAlert.setImageResource(R.drawable.clock);
+                    mAlert.setImageResource(R.drawable.clock);///设置图片来源
                     mAlert.setVisibility(View.VISIBLE);
                 } else {
                     mAlert.setVisibility(View.GONE);
                 }
             }
         }
-        mTime.setText(DateUtils.getRelativeTimeSpanString(data.getModifiedDate()));
+        ///设置内容，获取相关时间，从data里编辑的日期中获取
+        mTime. setText(DateUtils.getRelativeTimeSpanString(data.getModifiedDate()));
 
         setBackground(data);
     }
-
+    //根据data的文件属性来设置背景
     private void setBackground(NoteItemData data) {
         int id = data.getBgColorId();
+        //，若是note型文件，则4种情况，对于4种不同情况的背景来源
         if (data.getType() == Notes.TYPE_NOTE) {
+            //单个数据并且只有一个子文件夹
             if (data.isSingle() || data.isOneFollowingFolder()) {
                 setBackgroundResource(NoteItemBgResources.getNoteBgSingleRes(id));
-            } else if (data.isLast()) {
+            } else if (data.isLast()) {//是最后一个数据
                 setBackgroundResource(NoteItemBgResources.getNoteBgLastRes(id));
-            } else if (data.isFirst() || data.isMultiFollowingFolder()) {
+            } else if (data.isFirst() || data.isMultiFollowingFolder()) {//是一个数据并有多个子文件夹
                 setBackgroundResource(NoteItemBgResources.getNoteBgFirstRes(id));
             } else {
                 setBackgroundResource(NoteItemBgResources.getNoteBgNormalRes(id));
             }
         } else {
+            //若不是note直接调用文件夹的背景来源
             setBackgroundResource(NoteItemBgResources.getFolderBgRes());
         }
     }
-
     public NoteItemData getItemData() {
         return mItemData;
     }

src/ui/NotesPreferenceActivity.java

@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import android.accounts.Account;
@@ -47,66 +31,92 @@ import net.micode.notes.data.Notes;
 import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.gtask.remote.GTaskSyncService;
 
-
+/*
+ *该类功能：NotesPreferenceActivity，在小米便签中主要实现的是对背景颜色和字体大小的数据储存。
+ *       继承了PreferenceActivity主要功能为对系统信息和配置进行自动保存的Activity
+ */
 public class NotesPreferenceActivity extends PreferenceActivity {
     public static final String PREFERENCE_NAME = "notes_preferences";
-
+    //优先名
     public static final String PREFERENCE_SYNC_ACCOUNT_NAME = "pref_key_account_name";
-
+    //同步账号
     public static final String PREFERENCE_LAST_SYNC_TIME = "pref_last_sync_time";
-
+    //同步时间
     public static final String PREFERENCE_SET_BG_COLOR_KEY = "pref_key_bg_random_appear";
 
     private static final String PREFERENCE_SYNC_ACCOUNT_KEY = "pref_sync_account_key";
-
+    //同步密码
     private static final String AUTHORITIES_FILTER_KEY = "authorities";
-
+    //本地密码
     private PreferenceCategory mAccountCategory;
-
+    //账户分组
     private GTaskReceiver mReceiver;
-
+    //同步任务接收器
     private Account[] mOriAccounts;
-
+    //账户
     private boolean mHasAddedAccount;
+    //账户的hash标记
 
     @Override
+    /*
+     *函数功能：创建一个activity，在函数里要完成所有的正常静态设置
+     *参数：Bundle icicle：存放了 activity 当前的状态
+     *函数实现：如下注释
+     */
     protected void onCreate(Bundle icicle) {
+        //先执行父类的创建函数
         super.onCreate(icicle);
 
         /* using the app icon for navigation */
         getActionBar().setDisplayHomeAsUpEnabled(true);
+        //给左上角图标的左边加上一个返回的图标 
 
         addPreferencesFromResource(R.xml.preferences);
+        //添加xml来源并显示 xml
         mAccountCategory = (PreferenceCategory) findPreference(PREFERENCE_SYNC_ACCOUNT_KEY);
+        //根据同步账户关键码来初始化分组
         mReceiver = new GTaskReceiver();
         IntentFilter filter = new IntentFilter();
         filter.addAction(GTaskSyncService.GTASK_SERVICE_BROADCAST_NAME);
         registerReceiver(mReceiver, filter);
+        //初始化同步组件
 
         mOriAccounts = null;
         View header = LayoutInflater.from(this).inflate(R.layout.settings_header, null);
+        //获取listvivew，ListView的作用:用于列出所有选择 
         getListView().addHeaderView(header, null, true);
+        //在listview组件上方添加其他组件
     }
 
     @Override
+    /*
+     * 函数功能：activity交互功能的实现，用于接受用户的输入
+     * 函数实现：如下注释
+     */
     protected void onResume() {
+        //先执行父类 的交互实现
         super.onResume();
 
         // need to set sync account automatically if user has added a new
         // account
         if (mHasAddedAccount) {
+            //若用户新加了账户则自动设置同步账户
             Account[] accounts = getGoogleAccounts();
+            //获取google同步账户
             if (mOriAccounts != null && accounts.length > mOriAccounts.length) {
+                //若原账户不为空且当前账户有增加
                 for (Account accountNew : accounts) {
                     boolean found = false;
                     for (Account accountOld : mOriAccounts) {
                         if (TextUtils.equals(accountOld.name, accountNew.name)) {
+                            //更新账户
                             found = true;
                             break;
                         }
                     }
                     if (!found) {
                         setSyncAccount(accountNew.name);
+                        //若是没有找到旧的账户，那么同步账号中就只添加新账户
                         break;
                     }
                 }
@@ -114,58 +124,83 @@ public class NotesPreferenceActivity extends PreferenceActivity {
         }
 
         refreshUI();
+        //刷新标签界面
     }
 
     @Override
+    /*
+     * 函数功能：销毁一个activity
+     * 函数实现：如下注释
+     */
     protected void onDestroy() {
         if (mReceiver != null) {
             unregisterReceiver(mReceiver);
+            //注销接收器
         }
         super.onDestroy();
+        //执行父类的销毁动作
     }
 
+    /*
+     * 函数功能：重新设置账户信息
+     * 函数实现：如下注释
+     */
     private void loadAccountPreference() {
         mAccountCategory.removeAll();
-
+        //销毁所有的分组
         Preference accountPref = new Preference(this);
+        //建立首选项
         final String defaultAccount = getSyncAccountName(this);
         accountPref.setTitle(getString(R.string.preferences_account_title));
         accountPref.setSummary(getString(R.string.preferences_account_summary));
+        //设置首选项的大标题和小标题
         accountPref.setOnPreferenceClickListener(new OnPreferenceClickListener() {
             public boolean onPreferenceClick(Preference preference) {
+                //建立监听器
                 if (!GTaskSyncService.isSyncing()) {
                     if (TextUtils.isEmpty(defaultAccount)) {
                         // the first time to set account
+                        //若是第一次建立账户显示选择账户提示对话框
                         showSelectAccountAlertDialog();
                     } else {
                         // if the account has already been set, we need to promp
                         // user about the risk
+                        //若是已经建立则显示修改对话框并进行修改操作
                         showChangeAccountConfirmAlertDialog();
                     }
                 } else {
+                    //若在没有同步的情况下，则在toast中显示不能修改
                     Toast.makeText(NotesPreferenceActivity.this,
-                            R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT)
+                                    R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT)
                             .show();
                 }
                 return true;
             }
         });
 
+        //根据新建首选项编辑新的账户分组
         mAccountCategory.addPreference(accountPref);
     }
 
+    /*
+     *函数功能：设置按键的状态和最后同步的时间
+     *函数实现：如下注释
+     */
     private void loadSyncButton() {
         Button syncButton = (Button) findViewById(R.id.preference_sync_button);
         TextView lastSyncTimeView = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
-
+        //获取同步按钮控件和最终同步时间的的窗口
         // set button state
+        //设置按钮的状态
         if (GTaskSyncService.isSyncing()) {
+            //若是在同步状态下
             syncButton.setText(getString(R.string.preferences_button_sync_cancel));
             syncButton.setOnClickListener(new View.OnClickListener() {
                 public void onClick(View v) {
                     GTaskSyncService.cancelSync(NotesPreferenceActivity.this);
                 }
             });
+            //设置按钮显示的文本为“取消同步”以及监听器
         } else {
             syncButton.setText(getString(R.string.preferences_button_sync_immediately));
             syncButton.setOnClickListener(new View.OnClickListener() {
@@ -173,50 +208,67 @@ public class NotesPreferenceActivity extends PreferenceActivity {
                     GTaskSyncService.startSync(NotesPreferenceActivity.this);
                 }
             });
+            //若是不同步则设置按钮显示的文本为“立即同步”以及对应监听器
         }
         syncButton.setEnabled(!TextUtils.isEmpty(getSyncAccountName(this)));
+        //设置按键可用还是不可用
 
         // set last sync time
+        // 设置最终同步时间
         if (GTaskSyncService.isSyncing()) {
+            //若是在同步的情况下
             lastSyncTimeView.setText(GTaskSyncService.getProgressString());
             lastSyncTimeView.setVisibility(View.VISIBLE);
+            // 根据当前同步服务器设置时间显示框的文本以及可见性
         } else {
+            //若是非同步情况
             long lastSyncTime = getLastSyncTime(this);
             if (lastSyncTime != 0) {
                 lastSyncTimeView.setText(getString(R.string.preferences_last_sync_time,
                         DateFormat.format(getString(R.string.preferences_last_sync_time_format),
                                 lastSyncTime)));
                 lastSyncTimeView.setVisibility(View.VISIBLE);
+                //则根据最后同步时间的信息来编辑时间显示框的文本内容和可见性
             } else {
+                //若时间为空直接设置为不可见状态
                 lastSyncTimeView.setVisibility(View.GONE);
             }
         }
     }
-
+    /*
+     *函数功能：刷新标签界面
+     *函数实现：调用上文设置账号和设置按键两个函数来实现
+     */
     private void refreshUI() {
         loadAccountPreference();
         loadSyncButton();
     }
 
+    /*
+     * 函数功能：显示账户选择的对话框并进行账户的设置
+     * 函数实现：如下注释
+     */
     private void showSelectAccountAlertDialog() {
         AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
+        //创建一个新的对话框
 
         View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
         TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
         titleTextView.setText(getString(R.string.preferences_dialog_select_account_title));
         TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
         subtitleTextView.setText(getString(R.string.preferences_dialog_select_account_tips));
-
+        //设置标题以及子标题的内容
         dialogBuilder.setCustomTitle(titleView);
         dialogBuilder.setPositiveButton(null, null);
-
+        //设置对话框的自定义标题，建立一个YES的按钮
         Account[] accounts = getGoogleAccounts();
         String defAccount = getSyncAccountName(this);
-
+        //获取同步账户信息
         mOriAccounts = accounts;
         mHasAddedAccount = false;
 
         if (accounts.length > 0) {
+            //若账户不为空
             CharSequence[] items = new CharSequence[accounts.length];
             final CharSequence[] itemMapping = items;
             int checkedItem = -1;
@@ -224,83 +276,119 @@ public class NotesPreferenceActivity extends PreferenceActivity {
             for (Account account : accounts) {
                 if (TextUtils.equals(account.name, defAccount)) {
                     checkedItem = index;
+                    //在账户列表中查询到所需账户
                 }
                 items[index++] = account.name;
             }
             dialogBuilder.setSingleChoiceItems(items, checkedItem,
+                    //在对话框建立一个单选的复选框
                     new DialogInterface.OnClickListener() {
                         public void onClick(DialogInterface dialog, int which) {
                             setSyncAccount(itemMapping[which].toString());
                             dialog.dismiss();
+                            //取消对话框
                             refreshUI();
                         }
+                        //设置点击后执行的事件，包括检录新同步账户和刷新标签界面
                     });
+            //建立对话框网络版的监听器
         }
 
         View addAccountView = LayoutInflater.from(this).inflate(R.layout.add_account_text, null);
         dialogBuilder.setView(addAccountView);
+        //给新加账户对话框设置自定义样式
 
         final AlertDialog dialog = dialogBuilder.show();
+        //显示对话框
         addAccountView.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
                 mHasAddedAccount = true;
+                //将新加账户的hash置true
                 Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS");
+                //建立网络建立组件
                 intent.putExtra(AUTHORITIES_FILTER_KEY, new String[] {
-                    "gmail-ls"
+                        "gmail-ls"
                 });
                 startActivityForResult(intent, -1);
+                //跳回上一个选项
                 dialog.dismiss();
             }
         });
+        //建立新加账户对话框的监听器
     }
 
+    /*
+     * 函数功能：显示账户选择对话框和相关账户操作
+     * 函数实现：如下注释
+     */
     private void showChangeAccountConfirmAlertDialog() {
         AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
-
+        //创建一个新的对话框
         View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
         TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
         titleTextView.setText(getString(R.string.preferences_dialog_change_account_title,
                 getSyncAccountName(this)));
         TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
         subtitleTextView.setText(getString(R.string.preferences_dialog_change_account_warn_msg));
+        //根据同步修改的账户信息设置标题以及子标题的内容
         dialogBuilder.setCustomTitle(titleView);
-
+        //设置对话框的自定义标题
         CharSequence[] menuItemArray = new CharSequence[] {
                 getString(R.string.preferences_menu_change_account),
                 getString(R.string.preferences_menu_remove_account),
                 getString(R.string.preferences_menu_cancel)
         };
+        //定义一些标记字符串
         dialogBuilder.setItems(menuItemArray, new DialogInterface.OnClickListener() {
+            //设置对话框要显示的一个list，用于显示几个命令时,即change，remove，cancel
             public void onClick(DialogInterface dialog, int which) {
+                //按键功能，由which来决定
                 if (which == 0) {
+                    //进入账户选择对话框
                     showSelectAccountAlertDialog();
                 } else if (which == 1) {
+                    //删除账户并且跟新便签界面
                     removeSyncAccount();
                     refreshUI();
                 }
             }
         });
         dialogBuilder.show();
+        //显示对话框
     }
 
+    /*
+     *函数功能：获取谷歌账户
+     *函数实现：通过账户管理器直接获取
+     */
     private Account[] getGoogleAccounts() {
         AccountManager accountManager = AccountManager.get(this);
         return accountManager.getAccountsByType("com.google");
     }
 
+    /*
+     * 函数功能：设置同步账户
+     * 函数实现：如下注释：
+     */
     private void setSyncAccount(String account) {
         if (!getSyncAccountName(this).equals(account)) {
+            //假如该账号不在同步账号列表中
             SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
             SharedPreferences.Editor editor = settings.edit();
+            //编辑共享的首选项
             if (account != null) {
                 editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, account);
             } else {
                 editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
             }
+            //将该账号加入到首选项中
+
             editor.commit();
+            //提交修改的数据
+
 
-            // clean up last sync time
             setLastSyncTime(this, 0);
+            //将最后同步时间清零
 
             // clean up local gtask related info
             new Thread(new Runnable() {
@@ -311,23 +399,33 @@ public class NotesPreferenceActivity extends PreferenceActivity {
                     getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
                 }
             }).start();
+            //重置当地同步任务的信息
 
             Toast.makeText(NotesPreferenceActivity.this,
                     getString(R.string.preferences_toast_success_set_accout, account),
                     Toast.LENGTH_SHORT).show();
+            //将toast的文本信息置为“设置账户成功”并显示出来
         }
     }
-
+    /*
+     * 函数功能：删除同步账户
+     * 函数实现：如下注释：
+     */
     private void removeSyncAccount() {
         SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
         SharedPreferences.Editor editor = settings.edit();
+        //设置共享首选项
+
         if (settings.contains(PREFERENCE_SYNC_ACCOUNT_NAME)) {
             editor.remove(PREFERENCE_SYNC_ACCOUNT_NAME);
+            //假如当前首选项中有账户就删除
         }
         if (settings.contains(PREFERENCE_LAST_SYNC_TIME)) {
             editor.remove(PREFERENCE_LAST_SYNC_TIME);
+            //删除当前首选项中有账户时间
         }
         editor.commit();
+        //提交更新后的数据
 
         // clean up local gtask related info
         new Thread(new Runnable() {
@@ -338,51 +436,79 @@ public class NotesPreferenceActivity extends PreferenceActivity {
                 getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
             }
         }).start();
+        //重置当地同步任务的信息
     }
 
+    /*
+     * 函数功能：获取同步账户名称
+     * 函数实现：通过共享的首选项里的信息直接获取
+     */
     public static String getSyncAccountName(Context context) {
         SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
                 Context.MODE_PRIVATE);
         return settings.getString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
     }
 
+    /*
+     * 函数功能：设置最终同步的时间
+     * 函数实现：如下注释
+     */
     public static void setLastSyncTime(Context context, long time) {
         SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
                 Context.MODE_PRIVATE);
         SharedPreferences.Editor editor = settings.edit();
+        // 从共享首选项中找到相关账户并获取其编辑器
         editor.putLong(PREFERENCE_LAST_SYNC_TIME, time);
         editor.commit();
+        //编辑最终同步时间并提交更新
     }
-
+    /*
+     * 函数功能：获取最终同步时间
+     * 函数实现：通过共享的首选项里的信息直接获取
+     */
     public static long getLastSyncTime(Context context) {
         SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
                 Context.MODE_PRIVATE);
         return settings.getLong(PREFERENCE_LAST_SYNC_TIME, 0);
     }
 
+    /*
+     * 函数功能：接受同步信息
+     * 函数实现：继承BroadcastReceiver
+     */
     private class GTaskReceiver extends BroadcastReceiver {
 
         @Override
         public void onReceive(Context context, Intent intent) {
             refreshUI();
             if (intent.getBooleanExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_IS_SYNCING, false)) {
+                //获取随广播而来的Intent中的同步服务的数据
                 TextView syncStatus = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
                 syncStatus.setText(intent
                         .getStringExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_PROGRESS_MSG));
+                //通过获取的数据在设置系统的状态
             }
 
         }
     }
 
+    /*
+     * 函数功能：处理菜单的选项
+     * 函数实现：如下注释
+     * 参数:MenuItem菜单选项
+     */
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
+            //根据选项的id选择，这里只有一个主页
             case android.R.id.home:
                 Intent intent = new Intent(this, NotesListActivity.class);
                 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                 startActivity(intent);
                 return true;
+            //在主页情况下在创建连接组件intent，发出清空的信号并开始一个相应的activity
             default:
                 return false;
         }
     }
 }
+ 

src/widget/NoteWidgetProvider.java

@@ -31,7 +31,7 @@ import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.tool.ResourceParser;
 import net.micode.notes.ui.NoteEditActivity;
 import net.micode.notes.ui.NotesListActivity;
-
+//定义了一个抽象类，提供便签挂件
 public abstract class NoteWidgetProvider extends AppWidgetProvider {
     public static final String [] PROJECTION = new String [] {
         NoteColumns.ID,