注释了ui包大部分代码

src/main/java/net/micode/notes/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;
@@ -31,21 +15,25 @@ import net.micode.notes.data.Notes.NoteColumns;
 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()) {
@@ -61,5 +49,8 @@ public class AlarmInitReceiver extends BroadcastReceiver {
             }
             c.close();
         }
+        //然而通过网上查找资料发现，对于闹钟机制的启动，通常需要上面的几个步骤
+        //如新建Intent、PendingIntent以及AlarmManager等
+        //这里就是根据数据库里的闹钟时间创建一个闹钟机制
     }
-}
+}

src/main/java/net/micode/notes/ui/AlarmReceiver.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.BroadcastReceiver;
@@ -24,7 +8,13 @@ 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/main/java/net/micode/notes/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;
@@ -29,7 +13,8 @@ import android.widget.FrameLayout;
 import android.widget.NumberPicker;
 
 public class DateTimePicker extends FrameLayout {
-
+    //FrameLayout是布局模板之一
+    //所有的子元素全部在屏幕的右上方
     private static final boolean DEFAULT_ENABLE_STATE = true;
 
     private static final int HOURS_IN_HALF_DAY = 12;
@@ -45,13 +30,15 @@ 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
     private final NumberPicker mDateSpinner;
     private final NumberPicker mHourSpinner;
     private final NumberPicker mMinuteSpinner;
     private final NumberPicker mAmPmSpinner;
+    //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 Calendar mDate;
-
+    //定义了Calendar类型的变量mDate，用于操作时间
     private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK];
 
     private boolean mIsAm;
@@ -71,41 +58,49 @@ 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
+    //将现在日期的值传递给mDate；updateDateControl是同步操作
 
     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 +112,19 @@ 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 +144,7 @@ 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 +160,27 @@ 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);
     }
 
     public DateTimePicker(Context context) {
         this(context, System.currentTimeMillis());
-    }
+    }//通过对数据库的访问，获取当前的系统时间
 
     public DateTimePicker(Context context, long date) {
         this(context, date, DateFormat.is24HourFormat(context));
-    }
+    }//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
 
     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 +188,7 @@ 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);
@@ -226,7 +229,9 @@ public class DateTimePicker extends FrameLayout {
         mAmPmSpinner.setEnabled(enabled);
         mIsEnabled = enabled;
     }
-
+    //存在疑问！！！！！！！！！！！！！setEnabled的作用
+    //下面的代码通过原程序的注释已经比较清晰，另外可以通过函数名来判断
+    //下面的各函数主要是对上面代码引用到的各函数功能的实现
     @Override
     public boolean isEnabled() {
         return mIsEnabled;
@@ -239,7 +244,7 @@ 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
@@ -251,7 +256,7 @@ public class DateTimePicker extends FrameLayout {
         cal.setTimeInMillis(date);
         setCurrentDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH),
                 cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE));
-    }
+    }//实现函数功能——设置当前的时间，参数是date
 
     /**
      * Set the current date
@@ -263,19 +268,20 @@ 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);
         setCurrentHour(hourOfDay);
         setCurrentMinute(minute);
-    }
+    }//实现函数功能——设置当前的时间，参数是各详细的变量
 
     /**
      * Get current year
      *
      * @return The current year
      */
+    //下面是得到year、month、day等值
     public int getCurrentYear() {
         return mDate.get(Calendar.YEAR);
     }
@@ -446,7 +452,7 @@ public class DateTimePicker extends FrameLayout {
         mDateSpinner.setDisplayedValues(mDateDisplayValues);
         mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);
         mDateSpinner.invalidate();
-    }
+    }// 对于星期几的算法
 
     private void updateAmPmControl() {
         if (mIs24HourView) {
@@ -455,7 +461,7 @@ public class DateTimePicker extends FrameLayout {
             int index = mIsAm ? Calendar.AM : Calendar.PM;
             mAmPmSpinner.setValue(index);
             mAmPmSpinner.setVisibility(View.VISIBLE);
-        }
+        }// 对于上下午操作的算法
     }
 
     private void updateHourControl() {
@@ -465,7 +471,7 @@ public class DateTimePicker extends FrameLayout {
         } else {
             mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW);
             mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW);
-        }
+        }// 对与小时的算法
     }
 
     /**
@@ -482,4 +488,4 @@ public class DateTimePicker extends FrameLayout {
                     getCurrentMonth(), getCurrentDay(), getCurrentHourOfDay(), getCurrentMinute());
         }
     }
-}
+}

src/main/java/net/micode/notes/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;
@@ -32,35 +16,47 @@ import android.text.format.DateUtils;
 public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
 
     private Calendar mDate = Calendar.getInstance();
+    //创建一个Calendar类型的变量 mDate，方便时间的操作
     private boolean mIs24HourView;
     private OnDateTimeSetListener mOnDateTimeSetListener;
+    //声明一个时间日期滚动选择控件 mOnDateTimeSetListener
     private DateTimePicker mDateTimePicker;
+    //DateTimePicker控件，控件一般用于让用户可以从日期列表中选择单个值。
+    //运行时，单击控件边上的下拉箭头，会显示为两个部分：一个下拉列表，一个用于选择日期的
 
     public interface OnDateTimeSetListener {
         void OnDateTimeSet(AlertDialog dialog, long date);
     }
 
     public DateTimePickerDialog(Context context, long date) {
+        //对该界面对话框的实例化
         super(context);
+        //对数据库的操作
         mDateTimePicker = new DateTimePicker(context);
         setView(mDateTimePicker);
+        //添加一个子视图
         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);
                 mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
                 mDate.set(Calendar.MINUTE, minute);
+                //将视图中的各选项设置为系统当前时间
                 updateTitle(mDate.getTimeInMillis());
             }
         });
         mDate.setTimeInMillis(date);
+        //得到系统时间
         mDate.set(Calendar.SECOND, 0);
+        //将秒数设置为0
         mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());
         setButton(context.getString(R.string.datetime_dialog_ok), this);
         setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null);
+        //设置按钮
         set24HourView(DateFormat.is24HourFormat(this.getContext()));
+        //时间标准化打印
         updateTitle(mDate.getTimeInMillis());
     }
 
@@ -70,21 +66,22 @@ public class DateTimePickerDialog extends AlertDialog implements OnClickListener
 
     public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
         mOnDateTimeSetListener = callBack;
-    }
+    }//将时间日期滚动选择控件实例化
 
     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));
-    }
+    }//android开发中常见日期管理工具类（API）——DateUtils：按照上下午显示时间
 
     public void onClick(DialogInterface arg0, int arg1) {
         if (mOnDateTimeSetListener != null) {
             mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
         }
-    }
+    }//第一个参数arg0是接收到点击事件的对话框
+    //第二个参数arg1是该对话框上的按钮
 
 }

src/main/java/net/micode/notes/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;
@@ -30,14 +14,18 @@ import net.micode.notes.R;
 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();
@@ -48,14 +36,14 @@ public class DropdownMenu {
     public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
         if (mPopupMenu != null) {
             mPopupMenu.setOnMenuItemClickListener(listener);
-        }
+        }//设置菜单的监听
     }
 
     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/main/java/net/micode/notes/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;
@@ -30,10 +14,14 @@ import net.micode.notes.data.Notes.NoteColumns;
 
 
 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 +29,13 @@ 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 +44,22 @@ 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);
         }
 
@@ -77,4 +68,4 @@ public class FoldersListAdapter extends CursorAdapter {
         }
     }
 
-}
+}

src/main/java/net/micode/notes/ui/NoteEditText.java

@@ -37,15 +37,21 @@ import net.micode.notes.R;
 import java.util.HashMap;
 import java.util.Map;
 
+//类：便签编辑文本类，继承了Android控件EditText
 public class NoteEditText extends EditText {
+    //语句：常量标识
     private static final String TAG = "NoteEditText";
+    //语句：声明整型变量，文本索引
     private int mIndex;
+    //语句：声明整型变量
     private int mSelectionStartBeforeDelete;
 
+    //语句：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:" ;
 
+    //语句块：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 +61,60 @@ public class NoteEditText extends EditText {
 
     /**
      * Call by the {@link NoteEditActivity} to delete or add edit text
+     * 接口：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
+         * 方法：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
+         * 方法：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
+         * 方法：当文字发生变化时隐藏或者显示设置
          */
         void onTextChange(int index, boolean hasText);
     }
 
+    //语句：声明文本视图变化监听器
     private OnTextViewChangeListener mOnTextViewChangeListener;
 
+    //方法：构造方法，实例化NoteEditText
     public NoteEditText(Context context) {
         super(context, null);
         mIndex = 0;
     }
 
+    //方法：设置索引号
     public void setIndex(int index) {
         mIndex = index;
     }
 
+    //方法：设置文本视图变化监听器
     public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
         mOnTextViewChangeListener = listener;
     }
 
+    //方法：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);
     }
-
+    //方法：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
     }
 
+    //方法：监听触摸事件
     @Override
     public boolean onTouchEvent(MotionEvent event) {
         switch (event.getAction()) {
@@ -111,25 +127,38 @@ public class NoteEditText extends EditText {
                 x += getScrollX();
                 y += getScrollY();
 
+                //语句：获取布局
                 Layout layout = getLayout();
+                //语句：获取纵向的行数
                 int line = layout.getLineForVertical(y);
+                //语句：获取横向的偏移量
                 int off = layout.getOffsetForHorizontal(line, x);
                 Selection.setSelection(getText(), off);
                 break;
         }
-
+        //语句：继续调用父类的监听事件方法
         return super.onTouchEvent(event);
     }
 
+    /**
+     * 方法：监听键盘按键按下
+     * @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) {
+            //语句块：按下回车键
             case KeyEvent.KEYCODE_ENTER:
+                //语句块：如果文本视图没有变化
                 if (mOnTextViewChangeListener != null) {
                     return false;
                 }
                 break;
+            //语句块：按下删除键
             case KeyEvent.KEYCODE_DEL:
+                //语句：获取删除文本的开始位置
                 mSelectionStartBeforeDelete = getSelectionStart();
                 break;
             default:
@@ -138,26 +167,45 @@ public class NoteEditText extends EditText {
         return super.onKeyDown(keyCode, event);
     }
 
+
+    /**
+     * 方法：监听按键抬起
+     * @param keyCode
+     * @param event
+     * @return
+     */
     @Override
     public boolean onKeyUp(int keyCode, KeyEvent event) {
         switch(keyCode) {
+            //语句块：抬起删除键
             case KeyEvent.KEYCODE_DEL:
+                //语句块：如果文本视图发生变化
                 if (mOnTextViewChangeListener != null) {
+                    //语句块：选择了删除的文字
                     if (0 == mSelectionStartBeforeDelete && mIndex != 0) {
+                        //语句：监听文本的删除
                         mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString());
                         return true;
                     }
                 } else {
+                    //语句：报告文本视图变化监听器没有设置
                     Log.d(TAG, "OnTextViewChangeListener was not seted");
                 }
                 break;
+            //语句块：抬起回车键
             case KeyEvent.KEYCODE_ENTER:
+                //语句块：如果文本视图发生变化
                 if (mOnTextViewChangeListener != null) {
+                    //语句：获取选择区域的起点位置
                     int selectionStart = getSelectionStart();
+                    //语句：获取选择区域后面的文本信息
                     String text = getText().subSequence(selectionStart, length()).toString();
+                    //语句：实现文本换行的功能
                     setText(getText().subSequence(0, selectionStart));
+                    //语句：将选择区域内的文字移到下一行
                     mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text);
                 } else {
+                    //语句：报告文本视图变化监听器没有设置
                     Log.d(TAG, "OnTextViewChangeListener was not seted");
                 }
                 break;
@@ -167,9 +215,17 @@ public class NoteEditText extends EditText {
         return super.onKeyUp(keyCode, event);
     }
 
+    /**
+     * 处理当前视图下的焦点改变事件
+     * @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) {
+        //语句块：如果文本视图发生变化
         if (mOnTextViewChangeListener != null) {
+            //语句块：当焦点存在或者当前文本不为空时，监听文本的变化
             if (!focused && TextUtils.isEmpty(getText())) {
                 mOnTextViewChangeListener.onTextChange(mIndex, false);
             } else {
@@ -179,9 +235,13 @@ public class NoteEditText extends EditText {
         super.onFocusChanged(focused, direction, previouslyFocusedRect);
     }
 
+    /**
+     * 方法：创建环境菜单
+     */
     @Override
     protected void onCreateContextMenu(ContextMenu menu) {
         if (getText() instanceof Spanned) {
+            //语句块：获取高亮元素
             int selStart = getSelectionStart();
             int selEnd = getSelectionEnd();
 
@@ -189,6 +249,7 @@ public class NoteEditText extends EditText {
             int max = Math.max(selStart, selEnd);
 
             final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class);
+            //语句块：针对不同的高亮元素，使用不同的操作进行处理
             if (urls.length == 1) {
                 int defaultResId = 0;
                 for(String schema: sSchemaActionResMap.keySet()) {
@@ -201,7 +262,7 @@ public class NoteEditText extends EditText {
                 if (defaultResId == 0) {
                     defaultResId = R.string.note_link_other;
                 }
-
+                //语句块：添加环境菜单的点击事件
                 menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener(
                         new OnMenuItemClickListener() {
                             public boolean onMenuItemClick(MenuItem item) {