diff --git a/src/Notes-master/app/src/main/java/net/micode/notes/ui/NoteEditText.java b/src/Notes-master/app/src/main/java/net/micode/notes/ui/NoteEditText.java
index 2afe2a8..6c92ad8 100644
--- a/src/Notes-master/app/src/main/java/net/micode/notes/ui/NoteEditText.java
+++ b/src/Notes-master/app/src/main/java/net/micode/notes/ui/NoteEditText.java
@@ -1,17 +1,9 @@
 /*
  * 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.
+ * 版权声明：本代码受Apache许可证2.0版本保护
+ * 您可以在遵守许可证的前提下使用、修改和分发本代码
+ * 许可证全文可在http://www.apache.org/licenses/LICENSE-2.0获取
  */
 
 package net.micode.notes.ui;
@@ -37,63 +29,90 @@ import net.micode.notes.R;
 import java.util.HashMap;
 import java.util.Map;
 
+/**
+ * 笔记编辑文本框
+ * 功能：自定义EditText，扩展了特殊功能，如链接识别、清单模式编辑等
+ * 特点：支持处理Enter和Delete按键事件、URL链接上下文菜单、焦点变化监听
+ */
 public class NoteEditText extends EditText {
     private static final String TAG = "NoteEditText";
-    private int mIndex;
-    private int mSelectionStartBeforeDelete;
+    private int mIndex;                          // 当前编辑文本框在列表中的索引
+    private int mSelectionStartBeforeDelete;     // 删除操作前的光标位置
 
-    private static final String SCHEME_TEL = "tel:" ;
-    private static final String SCHEME_HTTP = "http:" ;
-    private static final String SCHEME_EMAIL = "mailto:" ;
+    // 支持的URL协议前缀
+    private static final String SCHEME_TEL = "tel:" ;    // 电话协议
+    private static final String SCHEME_HTTP = "http:" ;  // HTTP协议
+    private static final String SCHEME_EMAIL = "mailto:" ; // 邮件协议
 
+    // URL协议与菜单项文本资源映射
     private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>();
     static {
-        sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel);
-        sSchemaActionResMap.put(SCHEME_HTTP, R.string.note_link_web);
-        sSchemaActionResMap.put(SCHEME_EMAIL, R.string.note_link_email);
+        sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel);       // 电话链接菜单项
+        sSchemaActionResMap.put(SCHEME_HTTP, R.string.note_link_web);       // 网页链接菜单项
+        sSchemaActionResMap.put(SCHEME_EMAIL, R.string.note_link_email);    // 邮件链接菜单项
     }
 
     /**
-     * Call by the {@link NoteEditActivity} to delete or add edit text
+     * 文本视图变化监听器接口
+     * 用于与父容器(如NoteEditActivity)通信，处理特殊的编辑操作
      */
     public interface OnTextViewChangeListener {
         /**
-         * Delete current edit text when {@link KeyEvent#KEYCODE_DEL} happens
-         * and the text is null
+         * 当按下删除键且文本为空时，删除当前编辑文本框
+         * @param index 当前编辑文本框索引
+         * @param text 当前文本内容
          */
         void onEditTextDelete(int index, String text);
 
         /**
-         * Add edit text after current edit text when {@link KeyEvent#KEYCODE_ENTER}
-         * happen
+         * 当按下回车键时，在当前位置后添加新的编辑文本框
+         * @param index 当前编辑文本框索引
+         * @param text 当前光标后的文本内容
          */
         void onEditTextEnter(int index, String text);
 
         /**
-         * Hide or show item option when text change
+         * 当文本内容变化时，隐藏或显示项目选项
+         * @param index 当前编辑文本框索引
+         * @param hasText 是否有文本内容
          */
         void onTextChange(int index, boolean hasText);
     }
 
     private OnTextViewChangeListener mOnTextViewChangeListener;
 
+    /**
+     * 构造函数(单参数)
+     */
     public NoteEditText(Context context) {
         super(context, null);
         mIndex = 0;
     }
 
+    /**
+     * 设置当前编辑文本框在列表中的索引
+     */
     public void setIndex(int index) {
         mIndex = index;
     }
 
+    /**
+     * 设置文本视图变化监听器
+     */
     public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
         mOnTextViewChangeListener = listener;
     }
 
+    /**
+     * 构造函数(双参数)
+     */
     public NoteEditText(Context context, AttributeSet attrs) {
         super(context, attrs, android.R.attr.editTextStyle);
     }
 
+    /**
+     * 构造函数(三参数)
+     */
     public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
         // TODO Auto-generated constructor stub
@@ -101,9 +120,10 @@ public class NoteEditText extends EditText {
 
     @Override
     public boolean onTouchEvent(MotionEvent event) {
+        // 处理触摸事件，主要用于精确定位文本选择位置
         switch (event.getAction()) {
             case MotionEvent.ACTION_DOWN:
-
+                // 计算触摸点对应的文本位置
                 int x = (int) event.getX();
                 int y = (int) event.getY();
                 x -= getTotalPaddingLeft();
@@ -123,13 +143,16 @@ public class NoteEditText extends EditText {
 
     @Override
     public boolean onKeyDown(int keyCode, KeyEvent event) {
+        // 处理按键按下事件
         switch (keyCode) {
             case KeyEvent.KEYCODE_ENTER:
+                // 回车键由onKeyUp处理，这里返回false
                 if (mOnTextViewChangeListener != null) {
                     return false;
                 }
                 break;
             case KeyEvent.KEYCODE_DEL:
+                // 记录删除前的光标位置
                 mSelectionStartBeforeDelete = getSelectionStart();
                 break;
             default:
@@ -140,8 +163,10 @@ public class NoteEditText extends EditText {
 
     @Override
     public boolean onKeyUp(int keyCode, KeyEvent event) {
+        // 处理按键释放事件
         switch(keyCode) {
             case KeyEvent.KEYCODE_DEL:
+                // 处理删除键：当光标在文本开始位置且不是第一个编辑框时，删除当前编辑框
                 if (mOnTextViewChangeListener != null) {
                     if (0 == mSelectionStartBeforeDelete && mIndex != 0) {
                         mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString());
@@ -152,6 +177,7 @@ public class NoteEditText extends EditText {
                 }
                 break;
             case KeyEvent.KEYCODE_ENTER:
+                // 处理回车键：将当前文本在光标处分割，后半部分传递给下一个编辑框
                 if (mOnTextViewChangeListener != null) {
                     int selectionStart = getSelectionStart();
                     String text = getText().subSequence(selectionStart, length()).toString();
@@ -169,6 +195,7 @@ public class NoteEditText extends EditText {
 
     @Override
     protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
+        // 处理焦点变化事件，通知监听器当前文本状态
         if (mOnTextViewChangeListener != null) {
             if (!focused && TextUtils.isEmpty(getText())) {
                 mOnTextViewChangeListener.onTextChange(mIndex, false);
@@ -181,6 +208,7 @@ public class NoteEditText extends EditText {
 
     @Override
     protected void onCreateContextMenu(ContextMenu menu) {
+        // 创建上下文菜单，处理URL链接
         if (getText() instanceof Spanned) {
             int selStart = getSelectionStart();
             int selEnd = getSelectionEnd();
@@ -188,9 +216,11 @@ public class NoteEditText extends EditText {
             int min = Math.min(selStart, selEnd);
             int max = Math.max(selStart, selEnd);
 
+            // 获取选中文本中的URLSpan
             final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class);
             if (urls.length == 1) {
                 int defaultResId = 0;
+                // 根据URL协议选择合适的菜单项文本
                 for(String schema: sSchemaActionResMap.keySet()) {
                     if(urls[0].getURL().indexOf(schema) >= 0) {
                         defaultResId = sSchemaActionResMap.get(schema);
@@ -202,10 +232,11 @@ public class NoteEditText extends EditText {
                     defaultResId = R.string.note_link_other;
                 }
 
+                // 添加菜单项并设置点击监听器
                 menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener(
                         new OnMenuItemClickListener() {
                             public boolean onMenuItemClick(MenuItem item) {
-                                // goto a new intent
+                                // 点击菜单项时执行URLSpan的onClick方法
                                 urls[0].onClick(NoteEditText.this);
                                 return true;
                             }
@@ -214,4 +245,4 @@ public class NoteEditText extends EditText {
         }
         super.onCreateContextMenu(menu);
     }
-}
+}
\ No newline at end of file