ui注释

src/ui/AlarmAlertActivity注释.txt

@@ -0,0 +1,143 @@
+package net.micode.notes.ui;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.DialogInterface.OnDismissListener;
+import android.content.Intent;
+import android.media.AudioManager;
+import android.media.MediaPlayer;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.PowerManager;
+import android.provider.Settings;
+import android.view.Window;
+import android.view.WindowManager;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.tool.DataUtils;
+
+import java.io.IOException;
+
+public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
+    private long mNoteId; // 笔记ID
+    private String mSnippet; // 笔记片段
+    private static final int SNIPPET_PREW_MAX_LEN = 60; // 片段最大长度
+    MediaPlayer mPlayer; // 媒体播放器
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        requestWindowFeature(Window.FEATURE_NO_TITLE); // 请求无标题窗口
+
+        final Window win = getWindow();
+        win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED); // 显示在锁屏上
+
+        // 如果屏幕未开启，保持屏幕常亮
+        if (!isScreenOn()) {
+            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);
+        }
+
+        Intent intent = getIntent(); // 获取意图
+
+        try {
+            // 从意图中获取笔记ID
+            mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
+            // 根据ID获取笔记片段
+            mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
+            // 如果片段过长，截断并添加提示
+            mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0,
+                    SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info)
+                    : mSnippet;
+        } catch (IllegalArgumentException e) {
+            e.printStackTrace(); // 打印异常
+            return; // 退出
+        }
+
+        mPlayer = new MediaPlayer(); // 初始化媒体播放器
+        // 检查笔记是否可见
+        if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
+            showActionDialog(); // 显示操作对话框
+            playAlarmSound(); // 播放闹钟声音
+        } else {
+            finish(); // 结束活动
+        }
+    }
+
+    // 检查屏幕是否开启
+    private boolean isScreenOn() {
+        PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
+        return pm.isScreenOn();
+    }
+
+    // 播放闹钟声音
+    private void playAlarmSound() {
+        Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM); // 获取闹钟铃声URI
+
+        int silentModeStreams = Settings.System.getInt(getContentResolver(),
+                Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0);
+
+        // 设置音频流类型
+        if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) {
+            mPlayer.setAudioStreamType(silentModeStreams);
+        } else {
+            mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
+        }
+        try {
+            mPlayer.setDataSource(this, url); // 设置数据源
+            mPlayer.prepare(); // 准备播放器
+            mPlayer.setLooping(true); // 循环播放
+            mPlayer.start(); // 开始播放
+        } catch (IllegalArgumentException | SecurityException | IllegalStateException | IOException e) {
+            e.printStackTrace(); // 打印异常
+        }
+    }
+
+    // 显示操作对话框
+    private void showActionDialog() {
+        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
+        dialog.setTitle(R.string.app_name); // 设置对话框标题
+        dialog.setMessage(mSnippet); // 设置对话框消息
+        dialog.setPositiveButton(R.string.notealert_ok, this); // 设置确认按钮
+        if (isScreenOn()) {
+            dialog.setNegativeButton(R.string.notealert_enter, this); // 设置取消按钮
+        }
+        dialog.show().setOnDismissListener(this); // 显示对话框并设置消失监听
+    }
+
+    // 处理对话框按钮点击事件
+    public void onClick(DialogInterface dialog, int which) {
+        switch (which) {
+            case DialogInterface.BUTTON_NEGATIVE:
+                Intent intent = new Intent(this, NoteEditActivity.class);
+                intent.setAction(Intent.ACTION_VIEW);
+                intent.putExtra(Intent.EXTRA_UID, mNoteId); // 传递笔记ID
+                startActivity(intent); // 启动编辑活动
+                break;
+            default:
+                break;
+        }
+    }
+
+    // 处理对话框消失事件
+    public void onDismiss(DialogInterface dialog) {
+        stopAlarmSound(); // 停止闹钟声音
+        finish(); // 结束活动
+    }
+
+    // 停止闹钟声音
+    private void stopAlarmSound() {
+        if (mPlayer != null) {
+            mPlayer.stop(); // 停止播放
+            mPlayer.release(); // 释放资源
+            mPlayer = null; // 清空播放器引用
+        }
+    }
+}

src/ui/AlarmInitReceiver注释.txt

@@ -0,0 +1,53 @@
+package net.micode.notes.ui;
+
+import android.app.AlarmManager;
+import android.app.PendingIntent;
+import android.content.BroadcastReceiver;
+import android.content.ContentUris;
+import android.content.Context;
+import android.content.Intent;
+import android.database.***;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+
+public class AlarmInitReceiver extends BroadcastReceiver {
+
+    private static final String[] PROJECTION = new String[] {
+        NoteColumns.ID, // 笔记ID
+        NoteColumns.ALERTED_DATE // 警报日期
+    };
+
+    private static final int COLUMN_ID = 0; // ID列索引
+    private static final int COLUMN_ALERTED_DATE = 1; // 警报日期列索引
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        long currentDate = System.currentTimeMillis(); // 获取当前时间
+        // 查询所有警报日期在当前时间之后的笔记
+        *** c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
+                PROJECTION,
+                NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,
+                new String[]{String.valueOf(currentDate)},
+                null);
+
+        if (c != null) {
+            // 如果查询结果不为空，遍历结果
+            if (c.moveToFirst()) {
+                do {
+                    long alertDate = c.getLong(COLUMN_ALERTED_DATE); // 获取警报日期
+                    Intent sender = new Intent(context, AlarmReceiver.class); // 创建发送意图
+                    // 设置数据URI，附加笔记ID
+                    sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID)));
+                    // 创建PendingIntent，用于触发AlarmReceiver
+                    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0);
+                    // 获取AlarmManager服务
+                    AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
+                    // 设置闹钟
+                    alarmManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent);
+                } while (c.moveToNext()); // 继续遍历下一个结果
+            }
+            c.close(); // 关闭***
+        }
+    }
+}

src/ui/AlarmReceiver注释.txt

@@ -0,0 +1,17 @@
+package net.micode.notes.ui;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+public class AlarmReceiver extends BroadcastReceiver {
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        // 设置意图的目标类为 AlarmAlertActivity
+        intent.setClass(context, AlarmAlertActivity.class);
+        // 添加标志以启动新任务
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // 启动 AlarmAlertActivity
+        context.startActivity(intent);
+    }
+}

src/ui/DateTimePickerDialog注释.txt

@@ -0,0 +1,81 @@
+package net.micode.notes.ui;
+
+import java.util.Calendar;
+
+import net.micode.notes.R;
+import net.micode.notes.ui.DateTimePicker;
+import net.micode.notes.ui.DateTimePicker.OnDateTimeChangedListener;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.text.format.DateFormat;
+import android.text.format.DateUtils;
+
+public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
+
+    private Calendar mDate = Calendar.getInstance(); // 当前日期和时间
+    private boolean mIs24HourView; // 是否为24小时制
+    private OnDateTimeSetListener mOnDateTimeSetListener; // 日期时间设置监听器
+    private DateTimePicker mDateTimePicker; // 日期时间选择器
+
+    // 日期时间设置监听器接口
+    public interface OnDateTimeSetListener {
+        void OnDateTimeSet(AlertDialog dialog, long date); // 设置日期时间的方法
+    }
+
+    // 构造函数
+    public DateTimePickerDialog(Context context, long date) {
+        super(context);
+        mDateTimePicker = new DateTimePicker(context); // 初始化日期时间选择器
+        setView(mDateTimePicker); // 设置对话框视图为日期时间选择器
+        mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() {
+            public void onDateTimeChanged(DateTimePicker view, int year, int month,
+                    int dayOfMonth, int hourOfDay, int minute) {
+                // 更新日期和时间
+                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);
+                updateTitle(mDate.getTimeInMillis()); // 更新对话框标题
+            }
+        });
+        mDate.setTimeInMillis(date); // 设置初始日期
+        mDate.set(Calendar.SECOND, 0); // 将秒数设置为0
+        mDateTimePicker.setCurrentDate(mDate.getTimeInMillis()); // 设置选择器的当前日期
+        setButton(context.getString(R.string.datetime_dialog_ok), this); // 设置确认按钮
+        setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null); // 设置取消按钮
+        set24HourView(DateFormat.is24HourFormat(this.getContext())); // 设置24小时制
+        updateTitle(mDate.getTimeInMillis()); // 更新对话框标题
+    }
+
+    // 设置24小时制
+    public void set24HourView(boolean is24HourView) {
+        mIs24HourView = is24HourView; // 更新24小时制状态
+    }
+
+    // 设置日期时间设置监听器
+    public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
+        mOnDateTimeSetListener = callBack; // 更新监听器
+    }
+
+    // 更新对话框标题
+    private void updateTitle(long date) {
+        int flag =
+            DateUtils.FORMAT_SHOW_YEAR |
+            DateUtils.FORMAT_SHOW_DATE |
+            DateUtils.FORMAT_SHOW_TIME; // 设置标题格式
+        flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_12HOUR; // 根据24小时制设置格式
+        setTitle(DateUtils.formatDateTime(this.getContext(), date, flag)); // 设置对话框标题
+    }
+
+    // 确认按钮点击事件
+    public void onClick(DialogInterface arg0, int arg1) {
+        if (mOnDateTimeSetListener != null) {
+            mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis()); // 通知监听器设置的日期时间
+        }
+    }
+
+}

src/ui/DateTimePicker注释.txt

@@ -0,0 +1,484 @@
+package net.micode.notes.ui;
+
+import java.text.DateFormatSymbols;
+import java.util.Calendar;
+
+import net.micode.notes.R;
+
+import android.content.Context;
+import android.text.format.DateFormat;
+import android.view.View;
+import android.widget.FrameLayout;
+import android.widget.NumberPicker;
+
+public class DateTimePicker extends FrameLayout {
+
+    private static final boolean DEFAULT_ENABLE_STATE = true;
+
+    private static final int HOURS_IN_HALF_DAY = 12; // 半天的小时数
+    private static final int HOURS_IN_ALL_DAY = 24; // 全天的小时数
+    private static final int DAYS_IN_ALL_WEEK = 7; // 一周的天数
+    private static final int DATE_SPINNER_MIN_VAL = 0; // 日期选择器最小值
+    private static final int DATE_SPINNER_MAX_VAL = DAYS_IN_ALL_WEEK - 1; // 日期选择器最大值
+    private static final int HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW = 0; // 24小时制小时选择器最小值
+    private static final int HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW = 23; // 24小时制小时选择器最大值
+    private static final int HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW = 1; // 12小时制小时选择器最小值
+    private static final int HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW = 12; // 12小时制小时选择器最大值
+    private static final int MINUT_SPINNER_MIN_VAL = 0; // 分钟选择器最小值
+    private static final int MINUT_SPINNER_MAX_VAL = 59; // 分钟选择器最大值
+    private static final int AMPM_SPINNER_MIN_VAL = 0; // AM/PM选择器最小值
+    private static final int AMPM_SPINNER_MAX_VAL = 1; // AM/PM选择器最大值
+
+    private final NumberPicker mDateSpinner; // 日期选择器
+    private final NumberPicker mHourSpinner; // 小时选择器
+    private final NumberPicker mMinuteSpinner; // 分钟选择器
+    private final NumberPicker mAmPmSpinner; // AM/PM选择器
+    private Calendar mDate; // 日期对象
+
+    private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK]; // 日期显示值
+
+    private boolean mIsAm; // 是否为AM
+
+    private boolean mIs24HourView; // 是否为24小时制
+
+    private boolean mIsEnabled = DEFAULT_ENABLE_STATE; // 控件是否启用
+
+    private boolean mInitialising; // 是否正在初始化
+
+    private OnDateTimeChangedListener mOnDateTimeChangedListener; // 日期时间变化监听器
+
+    // 日期变化监听器
+    private NumberPicker.OnValueChangeListener mOnDateChangedListener = new NumberPicker.OnValueChangeListener() {
+        @Override
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            mDate.add(Calendar.DAY_OF_YEAR, newVal - oldVal); // 更新日期
+            updateDateControl(); // 更新日期控制
+            onDateTimeChanged(); // 通知日期时间变化
+        }
+    };
+
+    // 小时变化监听器
+    private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() {
+        @Override
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            boolean isDateChanged = false; // 日期是否变化
+            Calendar cal = Calendar.getInstance(); // 获取当前时间
+            if (!mIs24HourView) {
+                // 处理12小时制的AM/PM切换
+                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;
+                } 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;
+                }
+                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; // 切换AM/PM
+                    updateAmPmControl(); // 更新AM/PM控制
+                }
+            } else {
+                // 处理24小时制的日期变化
+                if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) {
+                    cal.setTimeInMillis(mDate.getTimeInMillis());
+                    cal.add(Calendar.DAY_OF_YEAR, 1);
+                    isDateChanged = true;
+                } else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {
+                    cal.setTimeInMillis(mDate.getTimeInMillis());
+                    cal.add(Calendar.DAY_OF_YEAR, -1);
+                    isDateChanged = true;
+                }
+            }
+            int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);
+            mDate.set(Calendar.HOUR_OF_DAY, newHour); // 设置小时
+            onDateTimeChanged(); // 通知日期时间变化
+            if (isDateChanged) {
+                setCurrentYear(cal.get(Calendar.YEAR));
+                setCurrentMonth(cal.get(Calendar.MONTH));
+                setCurrentDay(cal.get(Calendar.DAY_OF_MONTH));
+            }
+        }
+    };
+
+    // 分钟变化监听器
+    private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
+        @Override
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            int minValue = mMinuteSpinner.getMinValue();
+            int maxValue = mMinuteSpinner.getMaxValue();
+            int offset = 0;
+            if (oldVal == maxValue && newVal == minValue) {
+                offset += 1; // 处理分钟循环
+            } else if (oldVal == minValue && newVal == maxValue) {
+                offset -= 1; // 处理分钟循环
+            }
+            if (offset != 0) {
+                mDate.add(Calendar.HOUR_OF_DAY, offset); // 更新小时
+                mHourSpinner.setValue(getCurrentHour()); // 更新小时选择器
+                updateDateControl(); // 更新日期控制
+                int newHour = getCurrentHourOfDay();
+                if (newHour >= HOURS_IN_HALF_DAY) {
+                    mIsAm = false; // 设置为PM
+                    updateAmPmControl(); // 更新AM/PM控制
+                } else {
+                    mIsAm = true; // 设置为AM
+                    updateAmPmControl(); // 更新AM/PM控制
+                }
+            }
+            mDate.set(Calendar.MINUTE, newVal); // 设置分钟
+            onDateTimeChanged(); // 通知日期时间变化
+        }
+    };
+
+    // AM/PM变化监听器
+    private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {
+        @Override
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            mIsAm = !mIsAm; // 切换AM/PM
+            if (mIsAm) {
+                mDate.add(Calendar.HOUR_OF_DAY, -HOURS_IN_HALF_DAY); // 减去12小时
+            } else {
+                mDate.add(Calendar.HOUR_OF_DAY, HOURS_IN_HALF_DAY); // 加上12小时
+            }
+            updateAmPmControl(); // 更新AM/PM控制
+            onDateTimeChanged(); // 通知日期时间变化
+        }
+    };
+
+    // 日期时间变化监听器接口
+    public interface OnDateTimeChangedListener {
+        void onDateTimeChanged(DateTimePicker view, int year, int month,
+                int dayOfMonth, int hourOfDay, int minute);
+    }
+
+    // 构造函数
+    public DateTimePicker(Context context) {
+        this(context, System.currentTimeMillis()); // 默认当前时间
+    }
+
+    public DateTimePicker(Context context, long date) {
+        this(context, date, DateFormat.is24HourFormat(context)); // 根据时间和格式初始化
+    }
+
+    public DateTimePicker(Context context, long date, boolean is24HourView) {
+        super(context);
+        mDate = Calendar.getInstance(); // 初始化日期
+        mInitialising = true; // 设置为初始化状态
+        mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY; // 判断AM/PM
+        inflate(context, R.layout.datetime_picker, this); // 加载布局
+
+        // 初始化日期选择器
+        mDateSpinner = (NumberPicker) findViewById(R.id.date);
+        mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);
+        mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);
+        mDateSpinner.setOnValueChangedListener(mOnDateChangedListener);
+
+        // 初始化小时选择器
+        mHourSpinner = (NumberPicker) findViewById(R.id.hour);
+        mHourSpinner.setOnValueChangedListener(mOnHourChangedListener);
+        
+        // 初始化分钟选择器
+        mMinuteSpinner = (NumberPicker) findViewById(R.id.minute);
+        mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL);
+        mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL);
+        mMinuteSpinner.setOnLongPressUpdateInterval(100);
+        mMinuteSpinner.setOnValueChangedListener(mOnMinuteChangedListener);
+
+        // 初始化AM/PM选择器
+        String[] stringsForAmPm = new DateFormatSymbols().getAmPmStrings();
+        mAmPmSpinner = (NumberPicker) findViewById(R.id.amPm);
+        mAmPmSpinner.setMinValue(AMPM_SPINNER_MIN_VAL);
+        mAmPmSpinner.setMaxValue(AMPM_SPINNER_MAX_VAL);
+        mAmPmSpinner.setDisplayedValues(stringsForAmPm);
+        mAmPmSpinner.setOnValueChangedListener(mOnAmPmChangedListener);
+
+        // 更新控件到初始状态
+        updateDateControl();
+        updateHourControl();
+        updateAmPmControl();
+
+        set24HourView(is24HourView); // 设置24小时制
+
+        // 设置为当前时间
+        setCurrentDate(date);
+
+        setEnabled(isEnabled()); // 设置控件启用状态
+
+        // 设置内容描述
+        mInitialising = false; // 结束初始化状态
+    }
+
+    @Override
+    public void setEnabled(boolean enabled) {
+        if (mIsEnabled == enabled) {
+            return; // 如果状态未改变，直接返回
+        }
+        super.setEnabled(enabled);
+        mDateSpinner.setEnabled(enabled);
+        mMinuteSpinner.setEnabled(enabled);
+        mHourSpinner.setEnabled(enabled);
+        mAmPmSpinner.setEnabled(enabled);
+        mIsEnabled = enabled; // 更新启用状态
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return mIsEnabled; // 返回启用状态
+    }
+
+    /**
+     * 获取当前日期的毫秒值
+     *
+     * @return 当前日期的毫秒值
+     */
+    public long getCurrentDateInTimeMillis() {
+        return mDate.getTimeInMillis(); // 返回当前日期的毫秒值
+    }
+
+    /**
+     * 设置当前日期
+     *
+     * @param date 当前日期的毫秒值
+     */
+    public void setCurrentDate(long date) {
+        Calendar cal = Calendar.getInstance(); // 获取当前时间
+        cal.setTimeInMillis(date); // 设置为指定时间
+        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)); // 更新日期
+    }
+
+    /**
+     * 设置当前日期
+     *
+     * @param year 当前年份
+     * @param month 当前月份
+     * @param dayOfMonth 当前日期
+     * @param hourOfDay 当前小时
+     * @param minute 当前分钟
+     */
+    public void setCurrentDate(int year, int month,
+            int dayOfMonth, int hourOfDay, int minute) {
+        setCurrentYear(year);
+        setCurrentMonth(month);
+        setCurrentDay(dayOfMonth);
+        setCurrentHour(hourOfDay);
+        setCurrentMinute(minute);
+    }
+
+    /**
+     * 获取当前年份
+     *
+     * @return 当前年份
+     */
+    public int getCurrentYear() {
+        return mDate.get(Calendar.YEAR); // 返回当前年份
+    }
+
+    /**
+     * 设置当前年份
+     *
+     * @param year 当前年份
+     */
+    public void setCurrentYear(int year) {
+        if (!mInitialising && year == getCurrentYear()) {
+            return; // 如果年份未改变，直接返回
+        }
+        mDate.set(Calendar.YEAR, year); // 设置年份
+        updateDateControl(); // 更新日期控制
+        onDateTimeChanged(); // 通知日期时间变化
+    }
+
+    /**
+     * 获取当前月份
+     *
+     * @return 当前月份
+     */
+    public int getCurrentMonth() {
+        return mDate.get(Calendar.MONTH); // 返回当前月份
+    }
+
+    /**
+     * 设置当前月份
+     *
+     * @param month 当前月份
+     */
+    public void setCurrentMonth(int month) {
+        if (!mInitialising && month == getCurrentMonth()) {
+            return; // 如果月份未改变，直接返回
+        }
+        mDate.set(Calendar.MONTH, month); // 设置月份
+        updateDateControl(); // 更新日期控制
+        onDateTimeChanged(); // 通知日期时间变化
+    }
+
+    /**
+     * 获取当前日期
+     *
+     * @return 当前日期
+     */
+    public int getCurrentDay() {
+        return mDate.get(Calendar.DAY_OF_MONTH); // 返回当前日期
+    }
+
+    /**
+     * 设置当前日期
+     *
+     * @param dayOfMonth 当前日期
+     */
+    public void setCurrentDay(int dayOfMonth) {
+        if (!mInitialising && dayOfMonth == getCurrentDay()) {
+            return; // 如果日期未改变，直接返回
+        }
+        mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth); // 设置日期
+        updateDateControl(); // 更新日期控制
+        onDateTimeChanged(); // 通知日期时间变化
+    }
+
+    /**
+     * 获取当前小时（24小时制）
+     *
+     * @return 当前小时（0~23）
+     */
+    public int getCurrentHourOfDay() {
+        return mDate.get(Calendar.HOUR_OF_DAY); // 返回当前小时
+    }
+
+    private int getCurrentHour() {
+        if (mIs24HourView) {
+            return getCurrentHourOfDay(); // 如果是24小时制，直接返回
+        } else {
+            int hour = getCurrentHourOfDay();
+            if (hour > HOURS_IN_HALF_DAY) {
+                return hour - HOURS_IN_HALF_DAY; // 转换为12小时制
+            } else {
+                return hour == 0 ? HOURS_IN_HALF_DAY : hour; // 处理0点
+            }
+        }
+    }
+
+    /**
+     * 设置当前小时（24小时制）
+     *
+     * @param hourOfDay 当前小时
+     */
+    public void setCurrentHour(int hourOfDay) {
+        if (!mInitialising && hourOfDay == getCurrentHourOfDay()) {
+            return; // 如果小时未改变，直接返回
+        }
+        mDate.set(Calendar.HOUR_OF_DAY, hourOfDay); // 设置小时
+        if (!mIs24HourView) {
+            if (hourOfDay >= HOURS_IN_HALF_DAY) {
+                mIsAm = false; // 设置为PM
+                if (hourOfDay > HOURS_IN_HALF_DAY) {
+                    hourOfDay -= HOURS_IN_HALF_DAY; // 转换为12小时制
+                }
+            } else {
+                mIsAm = true; // 设置为AM
+                if (hourOfDay == 0) {
+                    hourOfDay = HOURS_IN_HALF_DAY; // 处理0点
+                }
+            }
+            updateAmPmControl(); // 更新AM/PM控制
+        }
+        mHourSpinner.setValue(hourOfDay); // 更新小时选择器
+        onDateTimeChanged(); // 通知日期时间变化
+    }
+
+    /**
+     * 获取当前分钟
+     *
+     * @return 当前分钟
+     */
+    public int getCurrentMinute() {
+        return mDate.get(Calendar.MINUTE); // 返回当前分钟
+    }
+
+    /**
+     * 设置当前分钟
+     *
+     * @param minute 当前分钟
+     */
+    public void setCurrentMinute(int minute) {
+        if (!mInitialising && minute == getCurrentMinute()) {
+            return; // 如果分钟未改变，直接返回
+        }
+        mMinuteSpinner.setValue(minute); // 更新分钟选择器
+        mDate.set(Calendar.MINUTE, minute); // 设置分钟
+        onDateTimeChanged(); // 通知日期时间变化
+    }
+
+    /**
+     * @return 如果是24小时制返回true，否则返回false。
+     */
+    public boolean is24HourView() {
+        return mIs24HourView; // 返回24小时制状态
+    }
+
+    /**
+     * 设置是否为24小时制或AM/PM模式。
+     *
+     * @param is24HourView true为24小时制，false为AM/PM模式。
+     */
+    public void set24HourView(boolean is24HourView) {
+        if (mIs24HourView == is24HourView) {
+            return; // 如果状态未改变，直接返回
+        }
+        mIs24HourView = is24HourView; // 更新24小时制状态
+        mAmPmSpinner.setVisibility(is24HourView ? View.GONE : View.VISIBLE); // 更新AM/PM选择器可见性
+        int hour = getCurrentHourOfDay();
+        updateHourControl(); // 更新小时控制
+        setCurrentHour(hour); // 设置当前小时
+        updateAmPmControl(); // 更新AM/PM控制
+    }
+
+    private void updateDateControl() {
+        Calendar cal = Calendar.getInstance();
+        cal.setTimeInMillis(mDate.getTimeInMillis());
+        cal.add(Calendar.DAY_OF_YEAR, -DAYS_IN_ALL_WEEK / 2 - 1); // 设置为当前日期的前半周
+        mDateSpinner.setDisplayedValues(null); // 清空显示值
+        for (int i = 0; i < DAYS_IN_ALL_WEEK; ++i) {
+            cal.add(Calendar.DAY_OF_YEAR, 1); // 增加一天
+            mDateDisplayValues[i] = (String) DateFormat.format("MM.dd EEEE", cal); // 格式化日期
+        }
+        mDateSpinner.setDisplayedValues(mDateDisplayValues); // 设置显示值
+        mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2); // 设置当前日期为中间值
+        mDateSpinner.invalidate(); // 刷新选择器
+    }
+
+    private void updateAmPmControl() {
+        if (mIs24HourView) {
+            mAmPmSpinner.setVisibility(View.GONE); // 隐藏AM/PM选择器
+        } else {
+            int index = mIsAm ? Calendar.AM : Calendar.PM; // 获取AM/PM索引
+            mAmPmSpinner.setValue(index); // 设置AM/PM选择器值
+            mAmPmSpinner.setVisibility(View.VISIBLE); // 显示AM/PM选择器
+        }
+    }
+
+    private void updateHourControl() {
+        if (mIs24HourView) {
+            mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW); // 设置24小时制最小值
+            mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW); // 设置24小时制最大值
+        } else {
+            mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW); // 设置12小时制最小值
+            mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW); // 设置12小时制最大值
+        }
+    }
+
+    /**
+     * 设置日期时间变化监听器。
+     * @param callback 监听器，如果为null则不做任何操作。
+     */
+    public void setOnDateTimeChangedListener(OnDateTimeChangedListener callback) {
+        mOnDateTimeChangedListener = callback; // 设置监听器
+    }
+
+    private void onDateTimeChanged() {
+        if (mOnDateTimeChangedListener != null) {
+            mOnDateTimeChangedListener.onDateTimeChanged(this, getCurrentYear(),
+                    getCurrentMonth(), getCurrentDay(), getCurrentHourOfDay(), getCurrentMinute()); // 通知日期时间变化
+        }
+    }
+}

src/ui/DropdownMenu注释.txt

@@ -0,0 +1,49 @@
+package net.micode.notes.ui;
+
+import android.content.Context;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.PopupMenu;
+import android.widget.PopupMenu.OnMenuItemClickListener;
+
+import net.micode.notes.R;
+
+public class DropdownMenu {
+    private Button mButton; // 下拉菜单按钮
+    private PopupMenu mPopupMenu; // 弹出菜单
+    private Menu mMenu; // 菜单对象
+
+    // 构造函数
+    public DropdownMenu(Context context, Button button, int menuId) {
+        mButton = button; // 初始化按钮
+        mButton.setBackgroundResource(R.drawable.dropdown_icon); // 设置按钮背景图标
+        mPopupMenu = new PopupMenu(context, mButton); // 创建弹出菜单
+        mMenu = mPopupMenu.getMenu(); // 获取菜单对象
+        mPopupMenu.getMenuInflater().inflate(menuId, mMenu); // 从资源文件中加载菜单
+        mButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                mPopupMenu.show(); // 显示弹出菜单
+            }
+        });
+    }
+
+    // 设置下拉菜单项点击监听器
+    public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
+        if (mPopupMenu != null) {
+            mPopupMenu.setOnMenuItemClickListener(listener); // 设置菜单项点击监听器
+        }
+    }
+
+    // 根据ID查找菜单项
+    public MenuItem findItem(int id) {
+        return mMenu.findItem(id); // 返回指定ID的菜单项
+    }
+
+    // 设置按钮标题
+    public void setTitle(CharSequence title) {
+        mButton.setText(title); // 更新按钮文本
+    }
+}

src/ui/FoldersListAdapter注释.txt

@@ -0,0 +1,76 @@
+package net.micode.notes.ui;
+
+import android.content.Context;
+import android.database.***;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.***Adapter;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+
+public class FoldersListAdapter extends ***Adapter {
+    // 定义要查询的列
+    public static final String[] PROJECTION = {
+        NoteColumns.ID,      // 文件夹ID
+        NoteColumns.SNIPPET  // 文件夹名称
+    };
+
+    // 列索引常量
+    public static final int ID_COLUMN = 0;   // ID列索引
+    public static final int NAME_COLUMN = 1; // 名称列索引
+
+    // 构造函数，接收上下文和***对象
+    public FoldersListAdapter(Context context, *** c) {
+        super(context, c); // 调用父类构造函数
+        // TODO Auto-generated constructor stub
+    }
+
+    // 创建新视图的方法
+    @Override
+    public View newView(Context context, *** cursor, ViewGroup parent) {
+        return new FolderListItem(context); // 返回新的文件夹列表项视图
+    }
+
+    // 绑定数据到视图的方法
+    @Override
+    public void bindView(View view, Context context, *** cursor) {
+        if (view instanceof FolderListItem) { // 确保视图是FolderListItem的实例
+            // 获取文件夹名称，如果是根文件夹则使用特定字符串
+            String folderName = (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
+                    .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
+            // 将文件夹名称绑定到视图
+            ((FolderListItem) view).bind(folderName);
+        }
+    }
+
+    // 根据位置获取文件夹名称的方法
+    public String getFolderName(Context context, int position) {
+        *** cursor = (***) getItem(position); // 获取指定位置的***
+        // 返回文件夹名称，如果是根文件夹则使用特定字符串
+        return (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
+                .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
+    }
+
+    // 内部类，表示文件夹列表项
+    private class FolderListItem extends LinearLayout {
+        private TextView mName; // 文件夹名称的TextView
+
+        // 构造函数，接收上下文
+        public FolderListItem(Context context) {
+            super(context);
+            // 从布局文件中加载视图
+            inflate(context, R.layout.folder_list_item, this);
+            // 获取文件夹名称的TextView
+            mName = (TextView) findViewById(R.id.tv_folder_name);
+        }
+
+        // 绑定文件夹名称到TextView的方法
+        public void bind(String name) {
+            mName.setText(name); // 设置TextView的文本为文件夹名称
+        }
+    }
+}

src/ui/NoteEditActivity注释.txt

@@ -0,0 +1,799 @@
+ SharedPreferences mSharedPrefs; // 共享偏好设置
+    private int mFontSizeId; // 当前字体大小ID
+
+    private static final String PREFERENCE_FONT_SIZE = "pref_font_size"; // 字体大小偏好设置的键
+
+    private static final int SHORTCUT_ICON_TITLE_MAX_LEN = 10; // 快捷方式图标标题的最大长度
+
+    public static final String TAG_CHECKED = String.valueOf('\u221A'); // 选中标记
+    public static final String TAG_UNCHECKED = String.valueOf('\u25A1'); // 未选中标记
+
+    private LinearLayout mEditTextList; // 编辑文本的线性布局
+
+    private String mUserQuery; // 用户查询的字符串
+    private Pattern mPattern; // 用于匹配的正则表达式模式
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        this.setContentView(R.layout.note_edit); // 设置内容视图为笔记编辑布局
+
+        // 如果没有保存的状态且初始化活动状态失败，则结束活动
+        if (savedInstanceState == null && !initActivityState(getIntent())) {
+            finish();
+            return;
+        }
+        initResources(); // 初始化资源
+    }
+
+    /**
+     * 当前活动可能在内存低时被杀死。再次加载此活动时，我们应该恢复之前的状态
+     */
+    @Override
+    protected void onRestoreInstanceState(Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+        // 如果保存的状态不为空且包含UID，则恢复活动状态
+        if (savedInstanceState != null && savedInstanceState.containsKey(Intent.EXTRA_UID)) {
+            Intent intent = new Intent(Intent.ACTION_VIEW);
+            intent.putExtra(Intent.EXTRA_UID, savedInstanceState.getLong(Intent.EXTRA_UID));
+            if (!initActivityState(intent)) {
+                finish();
+                return;
+            }
+            Log.d(TAG, "Restoring from killed activity"); // 日志记录恢复活动
+        }
+    }
+
+    private boolean initActivityState(Intent intent) {
+        // 初始化活动状态，根据传入的意图设置工作笔记
+        mWorkingNote = null; // 初始化工作笔记为null
+        if (TextUtils.equals(Intent.ACTION_VIEW, intent.getAction())) {
+            long noteId = intent.getLongExtra(Intent.EXTRA_UID, 0); // 获取笔记ID
+            mUserQuery = ""; // 初始化用户查询
+
+            // 从搜索结果开始
+            if (intent.hasExtra(SearchManager.EXTRA_DATA_KEY)) {
+                noteId = Long.parseLong(intent.getStringExtra(SearchManager.EXTRA_DATA_KEY));
+                mUserQuery = intent.getStringExtra(SearchManager.USER_QUERY);
+            }
+
+            // 检查笔记是否在数据库中可见
+            if (!DataUtils.visibleInNoteDatabase(getContentResolver(), noteId, Notes.TYPE_NOTE)) {
+                Intent jump = new Intent(this, NotesListActivity.class); // 跳转到笔记列表活动
+                startActivity(jump);
+                showToast(R.string.error_note_not_exist); // 显示错误消息
+                finish();
+                return false;
+            } else {
+                mWorkingNote = WorkingNote.load(this, noteId); // 加载工作笔记
+                if (mWorkingNote == null) {
+                    Log.e(TAG, "load note failed with note id" + noteId); // 日志记录加载失败
+                    finish();
+                    return false;
+                }
+            }
+            // 设置软输入模式
+            getWindow().setSoftInputMode(
+                    WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN
+                            | WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
+        } else if(TextUtils.equals(Intent.ACTION_INSERT_OR_EDIT, intent.getAction())) {
+            // 新笔记的处理
+            long folderId = intent.getLongExtra(Notes.INTENT_EXTRA_FOLDER_ID, 0); // 获取文件夹ID
+            int widgetId = intent.getIntExtra(Notes.INTENT_EXTRA_WIDGET_ID,
+                    AppWidgetManager.INVALID_APPWIDGET_ID); // 获取小部件ID
+            int widgetType = intent.getIntExtra(Notes.INTENT_EXTRA_WIDGET_TYPE,
+                    Notes.TYPE_WIDGET_INVALIDE); // 获取小部件类型
+            int bgResId = intent.getIntExtra(Notes.INTENT_EXTRA_BACKGROUND_ID,
+                    ResourceParser.getDefaultBgId(this)); // 获取背景资源ID
+
+            // 解析通话记录笔记
+            String phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER); // 获取电话号码
+            long callDate = intent.getLongExtra(Notes.INTENT_EXTRA_CALL_DATE, 0); // 获取通话日期
+            if (callDate != 0 && phoneNumber != null) {
+                if (TextUtils.isEmpty(phoneNumber)) {
+                    Log.w(TAG, "The call record number is null"); // 日志记录电话号码为空
+                }
+                long noteId = 0; // 初始化笔记ID
+                // 根据电话号码和通话日期获取笔记ID
+                if ((noteId = DataUtils.getNoteIdByPhoneNumberAndCallDate(getContentResolver(),
+                        phoneNumber, callDate)) > 0) {
+                    mWorkingNote = WorkingNote.load(this, noteId); // 加载通话记录笔记
+                    if (mWorkingNote == null) {
+                        Log.e(TAG, "load call note failed with note id" + noteId); // 日志记录加载失败
+                        finish();
+                        return false;
+                    }
+                } else {
+                    // 创建新的通话记录笔记
+                    mWorkingNote = WorkingNote.createEmptyNote(this, folderId, widgetId,
+                            widgetType, bgResId);
+                    mWorkingNote.convertToCallNote(phoneNumber, callDate); // 转换为通话记录笔记
+                }
+            } else {
+                // 创建空笔记
+                mWorkingNote = WorkingNote.createEmptyNote(this, folderId, widgetId, widgetType,
+                        bgResId);
+            }
+
+            // 设置软输入模式
+            getWindow().setSoftInputMode(
+                    WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE
+                            | WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
+        } else {
+            Log.e(TAG, "Intent not specified action, should not support"); // 日志记录意图未指定
+            finish();
+            return false;
+        }
+        mWorkingNote.setOnSettingStatusChangedListener(this); // 设置状态改变监听器
+        return true; // 返回初始化成功
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        initNoteScreen(); // 初始化笔记屏幕
+    }
+
+    private void initNoteScreen() {
+        // 设置编辑器的文本外观
+        mNoteEditor.setTextAppearance(this, TextAppearanceResources
+                .getTexAppearanceResource(mFontSizeId));
+        // 根据笔记的检查列表模式切换显示模式
+        if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {
+            switchToListMode(mWorkingNote.getContent()); // 切换到列表模式
+        } else {
+            // 设置编辑器的文本内容并高亮用户查询结果
+            mNoteEditor.setText(getHighlightQueryResult(mWorkingNote.getContent(), mUserQuery));
+            mNoteEditor.setSelection(mNoteEditor.getText().length()); // 将光标移动到文本末尾
+        }
+        // 隐藏所有背景选择器的选中状态
+        for (Integer id : sBgSelectorSelectionMap.keySet()) {
+            findViewById(sBgSelectorSelectionMap.get(id)).setVisibility(View.GONE);
+        }
+        // 设置头部视图和编辑面板的背景
+        mHeadViewPanel.setBackgroundResource(mWorkingNote.getTitleBgResId());
+        mNoteEditorPanel.setBackgroundResource(mWorkingNote.getBgColorResId());
+
+        // 显示最后修改时间
+        mNoteHeaderHolder.tvModified.setText(DateUtils.formatDateTime(this,
+                mWorkingNote.getModifiedDate(), DateUtils.FORMAT_SHOW_DATE
+                        | DateUtils.FORMAT_NUMERIC_DATE | DateUtils.FORMAT_SHOW_TIME
+                        | DateUtils.FORMAT_SHOW_YEAR));
+
+        /**
+         * TODO: Add the menu for setting alert. Currently disable it because the DateTimePicker
+         * is not ready
+         */
+        showAlertHeader(); // 显示提醒头部
+    }
+
+    private void showAlertHeader() {
+        // 检查工作笔记是否有设置提醒
+        if (mWorkingNote.hasClockAlert()) {
+            long time = System.currentTimeMillis(); // 获取当前时间
+            // 检查提醒时间是否已过期
+            if (time > mWorkingNote.getAlertDate()) {
+                mNoteHeaderHolder.tvAlertDate.setText(R.string.note_alert_expired); // 显示过期提醒
+            } else {
+                // 显示距离提醒的相对时间
+                mNoteHeaderHolder.tvAlertDate.setText(DateUtils.getRelativeTimeSpanString(
+                        mWorkingNote.getAlertDate(), time, DateUtils.MINUTE_IN_MILLIS));
+            }
+            // 显示提醒图标和日期
+            mNoteHeaderHolder.tvAlertDate.setVisibility(View.VISIBLE);
+            mNoteHeaderHolder.ivAlertIcon.setVisibility(View.VISIBLE);
+        } else {
+            // 隐藏提醒图标和日期
+            mNoteHeaderHolder.tvAlertDate.setVisibility(View.GONE);
+            mNoteHeaderHolder.ivAlertIcon.setVisibility(View.GONE);
+        }
+    }
+// 显示提醒头部信息
+private void showAlertHeader() {
+    // 检查工作笔记是否有时钟提醒
+    if (mWorkingNote.hasClockAlert()) {
+        long time = System.currentTimeMillis(); // 获取当前时间
+        // 检查当前时间是否超过提醒时间
+        if (time > mWorkingNote.getAlertDate()) {
+            // 如果提醒时间已过，设置文本为“提醒已过期”
+            mNoteHeaderHolder.tvAlertDate.setText(R.string.note_alert_expired);
+        } else {
+            // 否则，设置为相对时间字符串
+            mNoteHeaderHolder.tvAlertDate.setText(DateUtils.getRelativeTimeSpanString(
+                    mWorkingNote.getAlertDate(), time, DateUtils.MINUTE_IN_MILLIS));
+        }
+        // 显示提醒日期和图标
+        mNoteHeaderHolder.tvAlertDate.setVisibility(View.VISIBLE);
+        mNoteHeaderHolder.ivAlertIcon.setVisibility(View.VISIBLE);
+    } else {
+        // 如果没有时钟提醒，隐藏日期和图标
+        mNoteHeaderHolder.tvAlertDate.setVisibility(View.GONE);
+        mNoteHeaderHolder.ivAlertIcon.setVisibility(View.GONE);
+    }
+}
+
+// 处理新的意图
+@Override
+protected void onNewIntent(Intent intent) {
+    super.onNewIntent(intent); // 调用父类方法
+    initActivityState(intent); // 初始化活动状态
+}
+
+// 保存活动状态
+@Override
+protected void onSaveInstanceState(Bundle outState) {
+    super.onSaveInstanceState(outState); // 调用父类方法
+    // 如果工作笔记不在数据库中，保存笔记以生成ID
+    if (!mWorkingNote.existInDatabase()) {
+        saveNote();
+    }
+    // 将笔记ID保存到状态中
+    outState.putLong(Intent.EXTRA_UID, mWorkingNote.getNoteId());
+    Log.d(TAG, "Save working note id: " + mWorkingNote.getNoteId() + " onSaveInstanceState");
+}
+
+// 处理触摸事件
+@Override
+public boolean dispatchTouchEvent(MotionEvent ev) {
+    // 如果背景颜色选择器可见且触摸事件不在其范围内，隐藏选择器
+    if (mNoteBgColorSelector.getVisibility() == View.VISIBLE && !inRangeOfView(mNoteBgColorSelector, ev)) {
+        mNoteBgColorSelector.setVisibility(View.GONE);
+        return true; // 处理事件
+    }
+
+    // 如果字体大小选择器可见且触摸事件不在其范围内，隐藏选择器
+    if (mFontSizeSelector.getVisibility() == View.VISIBLE && !inRangeOfView(mFontSizeSelector, ev)) {
+        mFontSizeSelector.setVisibility(View.GONE);
+        return true; // 处理事件
+    }
+    return super.dispatchTouchEvent(ev); // 调用父类方法
+}
+
+// 检查触摸事件是否在视图范围内
+private boolean inRangeOfView(View view, MotionEvent ev) {
+    int[] location = new int[2]; // 存储视图的位置
+    view.getLocationOnScreen(location); // 获取视图在屏幕上的位置
+    int x = location[0]; // X坐标
+    int y = location[1]; // Y坐标
+    // 检查触摸事件是否在视图范围内
+    return !(ev.getX() < x || ev.getX() > (x + view.getWidth()) || ev.getY() < y || ev.getY() > (y + view.getHeight()));
+}
+
+// 初始化资源
+private void initResources() {
+    mHeadViewPanel = findViewById(R.id.note_title); // 获取标题视图
+    mNoteHeaderHolder = new HeadViewHolder(); // 创建头部视图持有者
+    // 初始化头部视图中的各个组件
+    mNoteHeaderHolder.tvModified = (TextView) findViewById(R.id.tv_modified_date);
+    mNoteHeaderHolder.ivAlertIcon = (ImageView) findViewById(R.id.iv_alert_icon);
+    mNoteHeaderHolder.tvAlertDate = (TextView) findViewById(R.id.tv_alert_date);
+    mNoteHeaderHolder.ibSetBgColor = (ImageView) findViewById(R.id.btn_set_bg_color);
+    mNoteHeaderHolder.ibSetBgColor.setOnClickListener(this); // 设置背景颜色按钮的点击监听器
+    mNoteEditor = (EditText) findViewById(R.id.note_edit_view); // 获取笔记编辑视图
+    mNoteEditorPanel = findViewById(R.id.sv_note_edit); // 获取笔记编辑面板
+    mNoteBgColorSelector = findViewById(R.id.note_bg_color_selector); // 获取背景颜色选择器
+
+    // 为背景颜色选择器中的每个按钮设置点击监听器
+    for (int id : sBgSelectorBtnsMap.keySet()) {
+        ImageView iv = (ImageView) findViewById(id);
+        iv.setOnClickListener(this);
+    }
+
+    mFontSizeSelector = findViewById(R.id.font_size_selector); // 获取字体大小选择器
+    // 为字体大小选择器中的每个按钮设置点击监听器
+    for (int id : sFontSizeBtnsMap.keySet()) {
+        View view = findViewById(id);
+        view.setOnClickListener(this);
+    }
+    mSharedPrefs = PreferenceManager.getDefaultSharedPreferences(this); // 获取共享偏好设置
+    mFontSizeId = mSharedPrefs.getInt(PREFERENCE_FONT_SIZE, ResourceParser.BG_DEFAULT_FONT_SIZE); // 获取字体大小ID
+    // 检查字体大小ID是否有效
+    if (mFontSizeId >= TextAppearanceResources.getResourcesSize()) {
+        mFontSizeId = ResourceParser.BG_DEFAULT_FONT_SIZE; // 修复共享偏好设置中的资源ID问题
+    }
+    mEditTextList = (LinearLayout) findViewById(R.id.note_edit_list); // 获取笔记编辑列表
+}
+
+// 在活动暂停时调用
+@Override
+protected void onPause() {
+    super.onPause(); // 调用父类方法
+    // 如果保存笔记成功，记录日志
+    if (saveNote()) {
+        Log.d(TAG, "Note data was saved with length:" + mWorkingNote.getContent().length());
+    }
+    clearSettingState(); // 清理设置状态
+}
+
+// 更新小部件
+private void updateWidget() {
+    Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE); // 创建更新小部件的意图
+    // 根据工作笔记的小部件类型设置相应的小部件提供者
+    if (mWorkingNote.getWidgetType() == Notes.TYPE_WIDGET_2X) {
+        intent.setClass(this, NoteWidgetProvider_2x.class);
+    } else if (mWorkingNote.getWidgetType() == Notes.TYPE_WIDGET_4X) {
+        intent.setClass(this, NoteWidgetProvider_4x.class);
+    } else {
+        Log.e(TAG, "Unsupported widget type"); // 记录不支持的小部件类型
+        return; // 退出方法
+    }
+
+    // 将小部件ID放入意图中
+    intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[]{
+            mWorkingNote.getWidgetId()
+    });
+
+    sendBroadcast(intent); // 发送广播以更新小部件
+    setResult(RESULT_OK, intent); // 设置结果为成功
+}
+
+// 处理点击事件
+public void onClick(View v) {
+    int id = v.getId(); // 获取点击视图的ID
+    // 如果点击的是设置背景颜色按钮，显示背景颜色选择器
+    if (id == R.id.btn_set_bg_color) {
+        mNoteBgColorSelector.setVisibility(View.VISIBLE);
+        // 显示当前背景颜色的选择状态
+        findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility(View.VISIBLE);
+    } else if (sBgSelectorBtnsMap.containsKey(id)) {
+        // 如果点击的是背景颜色选择器中的按钮，更新背景颜色并隐藏选择器
+        findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility(View.GONE);
+        mWorkingNote.setBgColorId(sBgSelectorBtnsMap.get(id)); // 设置新的背景颜色ID
+        mNoteBgColorSelector.setVisibility(View.GONE); // 隐藏选择器
+    } else if (sFontSizeBtnsMap.containsKey(id)) {
+        // 如果点击的是字体大小选择器中的按钮，更新字体大小并隐藏选择器
+        findViewById(sFontSelectorSelectionMap.get(mFontSizeId)).setVisibility(View.GONE);
+        mFontSizeId = sFontSizeBtnsMap.get(id); // 更新字体大小ID
+        mSharedPrefs.edit().putInt(PREFERENCE_FONT_SIZE, mFontSizeId).commit(); // 保存新的字体大小到共享偏好设置
+        findViewById(sFontSelectorSelectionMap.get(mFontSizeId)).setVisibility(View.VISIBLE); // 显示新的字体大小选择状态
+        // 如果当前模式为检查列表模式，切换到列表模式
+        if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {
+            getWorkingText(); // 获取当前文本
+            switchToListMode(mWorkingNote.getContent()); // 切换到列表模式
+        } else {
+            // 否则，设置编辑器的文本外观
+            mNoteEditor.setTextAppearance(this,
+                    TextAppearanceResources.getTexAppearanceResource(mFontSizeId));
+        }
+        mFontSizeSelector.setVisibility(View.GONE); // 隐藏字体大小选择器
+    }
+}
+
+// 处理返回按键事件
+@Override
+public void onBackPressed() {
+    // 如果清理设置状态成功，返回
+    if (clearSettingState()) {
+        return;
+    }
+
+    saveNote(); // 保存笔记
+    super.onBackPressed(); // 调用父类方法
+}
+
+// 清理设置状态
+private boolean clearSettingState() {
+    // 如果背景颜色选择器可见，隐藏它并返回true
+    if (mNoteBgColorSelector.getVisibility() == View.VISIBLE) {
+        mNoteBgColorSelector.setVisibility(View.GONE);
+        return true;
+    } else if (mFontSizeSelector.getVisibility() == View.VISIBLE) {
+        // 如果字体大小选择器可见，隐藏它并返回true
+        mFontSizeSelector.setVisibility(View.GONE);
+        return true;
+    }
+    return false; // 没有设置状态需要清理
+}
+
+// 处理背景颜色变化
+public void onBackgroundColorChanged() {
+    // 显示当前背景颜色的选择状态
+    findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility(View.VISIBLE);
+    // 更新编辑面板和标题面板的背景资源
+    mNoteEditorPanel.setBackgroundResource(mWorkingNote.getBgColorResId());
+    mHeadViewPanel.setBackgroundResource(mWorkingNote.getTitleBgResId());
+}
+
+// 准备选项菜单
+@Override
+public boolean onPrepareOptionsMenu(Menu menu) {
+    // 如果活动正在结束，直接返回
+    if (isFinishing()) {
+        return true;
+    }
+    clearSettingState(); // 清理设置状态
+    menu.clear(); // 清空菜单
+    // 根据文件夹ID加载相应的菜单
+    if (mWorkingNote.getFolderId() == Notes.ID_CALL_RECORD_FOLDER) {
+        getMenuInflater().inflate(R.menu.call_note_edit, menu);
+    } else {
+        getMenuInflater().inflate(R.menu.note_edit, menu);
+    }
+    // 根据当前模式设置列表模式菜单项的标题
+    if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {
+        menu.findItem(R.id.menu_list_mode).setTitle(R.string.menu_normal_mode);
+    } else {
+        menu.findItem(R.id.menu_list_mode).setTitle(R.string.menu_list_mode);
+    }
+    // 根据是否有时钟提醒设置菜单项的可见性
+    if (mWorkingNote.hasClockAlert()) {
+        menu.findItem(R.id.menu_alert).setVisible(false);
+    } else {
+        menu.findItem(R.id.menu_delete_remind).setVisible(false);
+    }
+    return true; // 返回true表示菜单已准备好
+}
+
+@Override
+public boolean onOptionsItemSelected(MenuItem item) {
+    // 处理选项菜单的点击事件
+    switch (item.getItemId()) {
+        case R.id.menu_new_note:
+            // 创建新笔记
+            createNewNote();
+            break;
+        case R.id.menu_delete:
+            // 删除当前笔记的确认对话框
+            AlertDialog.Builder builder = new AlertDialog.Builder(this);
+            builder.setTitle(getString(R.string.alert_title_delete)); // 设置对话框标题
+            builder.setIcon(android.R.drawable.ic_dialog_alert); // 设置对话框图标
+            builder.setMessage(getString(R.string.alert_message_delete_note)); // 设置对话框消息
+            builder.setPositiveButton(android.R.string.ok,
+                    new DialogInterface.OnClickListener() {
+                        public void onClick(DialogInterface dialog, int which) {
+                            // 确认删除当前笔记
+                            deleteCurrentNote();
+                            finish(); // 结束当前活动
+                        }
+                    });
+            builder.setNegativeButton(android.R.string.cancel, null); // 取消按钮
+            builder.show(); // 显示对话框
+            break;
+        case R.id.menu_font_size:
+            // 显示字体大小选择器
+            mFontSizeSelector.setVisibility(View.VISIBLE);
+            findViewById(sFontSelectorSelectionMap.get(mFontSizeId)).setVisibility(View.VISIBLE);
+            break;
+        case R.id.menu_list_mode:
+            // 切换检查列表模式
+            mWorkingNote.setCheckListMode(mWorkingNote.getCheckListMode() == 0 ?
+                    TextNote.MODE_CHECK_LIST : 0);
+            break;
+        case R.id.menu_share:
+            // 分享当前笔记内容
+            getWorkingText();
+            sendTo(this, mWorkingNote.getContent());
+            break;
+        case R.id.menu_send_to_desktop:
+            // 发送笔记到桌面
+            sendToDesktop();
+            break;
+        case R.id.menu_alert:
+            // 设置提醒
+            setReminder();
+            break;
+        case R.id.menu_delete_remind:
+            // 删除提醒
+            mWorkingNote.setAlertDate(0, false);
+            break;
+        default:
+            break; // 默认情况下不做任何操作
+    }
+    return true; // 返回true表示事件已处理
+}
+
+private void setReminder() {
+    // 设置提醒的对话框
+    DateTimePickerDialog d = new DateTimePickerDialog(this, System.currentTimeMillis());
+    d.setOnDateTimeSetListener(new OnDateTimeSetListener() {
+        public void OnDateTimeSet(AlertDialog dialog, long date) {
+            // 用户设置了提醒时间
+            mWorkingNote.setAlertDate(date, true);
+        }
+    });
+    d.show(); // 显示日期时间选择对话框
+}
+
+/**
+ * 分享笔记到支持 {@link Intent#ACTION_SEND} 动作和 {@text/plain} 类型的应用
+ */
+private void sendTo(Context context, String info) {
+    Intent intent = new Intent(Intent.ACTION_SEND); // 创建发送意图
+    intent.putExtra(Intent.EXTRA_TEXT, info); // 添加要发送的文本
+    intent.setType("text/plain"); // 设置意图类型为纯文本
+    context.startActivity(intent); // 启动发送意图
+}
+
+private void createNewNote() {
+    // 首先，保存当前编辑的笔记
+    saveNote();
+
+    // 为了安全，启动新的 NoteEditActivity
+    finish(); // 结束当前活动
+    Intent intent = new Intent(this, NoteEditActivity.class);
+    intent.setAction(Intent.ACTION_INSERT_OR_EDIT); // 设置意图动作为插入或编辑
+    intent.putExtra(Notes.INTENT_EXTRA_FOLDER_ID, mWorkingNote.getFolderId()); // 传递文件夹ID
+    startActivity(intent); // 启动新的活动
+}
+
+private void deleteCurrentNote() {
+    // 删除当前笔记
+    if (mWorkingNote.existInDatabase()) { // 检查笔记是否存在于数据库中
+        HashSet<Long> ids = new HashSet<Long>(); // 创建ID集合
+        long id = mWorkingNote.getNoteId(); // 获取当前笔记ID
+        if (id != Notes.ID_ROOT_FOLDER) {
+            ids.add(id); // 如果不是根文件夹，添加ID到集合
+        } else {
+            Log.d(TAG, "Wrong note id, should not happen"); // 日志记录错误
+        }
+        if (!isSyncMode()) { // 如果不是同步模式
+            if (!DataUtils.batchDeleteNotes(getContentResolver(), ids)) {
+                Log.e(TAG, "Delete Note error"); // 删除笔记错误日志
+            }
+        } else {
+            // 在同步模式下，将笔记移动到垃圾箱
+            if (!DataUtils.batchMoveToFolder(getContentResolver(), ids, Notes.ID_TRASH_FOLER)) {
+                Log.e(TAG, "Move notes to trash folder error, should not happens"); // 移动到垃圾箱错误日志
+            }
+        }
+    }
+    mWorkingNote.markDeleted(true); // 标记笔记为已删除
+}
+
+private boolean isSyncMode() {
+    // 检查是否处于同步模式
+    return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0;
+}
+
+public void onClockAlertChanged(long date, boolean set) {
+    // 用户设置时钟提醒
+    if (!mWorkingNote.existInDatabase()) {
+        saveNote(); // 如果笔记不存在，先保存
+    }
+    if (mWorkingNote.getNoteId() > 0) { // 确保笔记ID有效
+        Intent intent = new Intent(this, AlarmReceiver.class);
+        intent.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mWorkingNote.getNoteId())); // 设置意图数据
+        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0); // 创建待处理意图
+        AlarmManager alarmManager = ((AlarmManager) getSystemService(ALARM_SERVICE)); // 获取闹钟管理器
+        showAlertHeader(); // 显示提醒头部
+        if (!set) {
+            alarmManager.cancel(pendingIntent); // 取消提醒
+        } else {
+            alarmManager.set(AlarmManager.RTC_WAKEUP, date, pendingIntent); // 设置提醒
+        }
+    } else {
+        // 如果没有输入内容，提醒用户输入
+        Log.e(TAG, "Clock alert setting error");
+        showToast(R.string.error_note_empty_for_clock);
+    }
+}
+
+public void onWidgetChanged() {
+    // 小部件状态改变时更新小部件
+    updateWidget();
+}
+
+public void onEditTextDelete(int index, String text) {
+    // 删除编辑文本中的某一项
+    int childCount = mEditTextList.getChildCount();
+    if (childCount == 1) {
+        return; // 如果只有一个子项，不执行删除
+    }
+
+    // 更新后续子项的索引
+    for (int i = index + 1; i < childCount; i++) {
+        ((NoteEditText) mEditTextList.getChildAt(i).findViewById(R.id.et_edit_text))
+                .setIndex(i - 1);
+    }
+
+    mEditTextList.removeViewAt(index); // 从列表中移除视图
+    NoteEditText edit = null;
+    if (index == 0) {
+        edit = (NoteEditText) mEditTextList.getChildAt(0).findViewById(R.id.et_edit_text);
+    } else {
+        edit = (NoteEditText) mEditTextList.getChildAt(index - 1).findViewById(R.id.et_edit_text);
+    }
+    int length = edit.length(); // 获取文本长度
+    edit.append(text); // 在删除后追加文本
+    edit.requestFocus(); // 请求焦点
+    edit.setSelection(length); // 设置光标位置
+}
+
+public void onEditTextEnter(int index, String text) {
+    // 在编辑文本中插入新项
+    if (index > mEditTextList.getChildCount()) {
+        Log.e(TAG, "Index out of mEditTextList boundrary, should not happen"); // 日志记录错误
+    }
+
+    View view = getListItem(text, index); // 获取新项视图
+    mEditTextList.addView(view, index); // 在指定索引处添加视图
+    NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
+    edit.requestFocus(); // 请求焦点
+    edit.setSelection(0); // 设置光标位置
+    // 更新后续子项的索引
+    for (int i = index + 1; i < mEditTextList.getChildCount(); i++) {
+        ((NoteEditText) mEditTextList.getChildAt(i).findViewById(R.id.et_edit_text))
+                .setIndex(i);
+    }
+}
+
+private void switchToListMode(String text) {
+    // 切换到列表模式
+    mEditTextList.removeAllViews(); // 移除所有子视图
+    String[] items = text.split("\n"); // 按行分割文本
+    int index = 0;
+    for (String item : items) {
+        if (!TextUtils.isEmpty(item)) {
+            mEditTextList.addView(getListItem(item, index)); // 添加非空项
+            index++;
+        }
+    }
+    mEditTextList.addView(getListItem("", index)); // 添加空项以便用户继续输入
+    mEditTextList.getChildAt(index).findViewById(R.id.et_edit_text).requestFocus(); // 请求焦点
+
+    mNoteEditor.setVisibility(View.GONE); // 隐藏笔记编辑器
+    mEditTextList.setVisibility(View.VISIBLE); // 显示编辑列表
+}
+
+private Spannable getHighlightQueryResult(String fullText, String userQuery) {
+    // 高亮用户查询结果
+    SpannableString spannable = new SpannableString(fullText == null ? "" : fullText);
+    if (!TextUtils.isEmpty(userQuery)) {
+        mPattern = Pattern.compile(userQuery); // 编译用户查询
+        Matcher m = mPattern.matcher(fullText); // 创建匹配器
+        int start = 0;
+        while (m.find(start)) {
+            // 设置高亮背景
+            spannable.setSpan(
+                    new BackgroundColorSpan(this.getResources().getColor(R.color.user_query_highlight)), 
+                    m.start(), m.end(),
+                    Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
+            start = m.end(); // 更新起始位置
+        }
+    }
+    return spannable; // 返回高亮文本
+}
+
+private View getListItem(String item, int index) {
+    // 获取列表项视图
+    View view = LayoutInflater.from(this).inflate(R.layout.note_edit_list_item, null);
+    final NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
+    edit.setTextAppearance(this, TextAppearanceResources.getTexAppearanceResource(mFontSizeId)); // 设置文本外观
+    CheckBox cb = ((CheckBox) view.findViewById(R.id.cb_edit_item)); // 获取复选框
+    cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
+        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+            // 根据复选框状态更新文本样式
+            if (isChecked) {
+                edit.setPaintFlags(edit.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG); // 添加删除线
+            } else {
+                edit.setPaintFlags(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG); // 恢复正常样式
+            }
+        }
+    });
+
+    // 根据项的状态设置复选框和文本样式
+    if (item.startsWith(TAG_CHECKED)) {
+        cb.setChecked(true); // 设置复选框为选中状态
+        edit.setPaintFlags(edit.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG); // 添加删除线
+        item = item.substring(TAG_CHECKED.length(), item.length()).trim(); // 去掉标记
+    } else if (item.startsWith(TAG_UNCHECKED)) {
+        cb.setChecked(false); // 设置复选框为未选中状态
+        edit.setPaintFlags(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG); // 恢复正常样式
+        item = item.substring(TAG_UNCHECKED.length(), item.length()).trim(); // 去掉标记
+    }
+
+    edit.setOnTextViewChangeListener(this); // 设置文本变化监听器
+    edit.setIndex(index); // 设置索引
+    edit.setText(getHighlightQueryResult(item, mUserQuery)); // 设置高亮文本
+    return view; // 返回视图
+}
+
+public void onTextChange(int index, boolean hasText) {
+    // 处理文本变化事件
+    if (index >= mEditTextList.getChildCount()) {
+        Log.e(TAG, "Wrong index, should not happen"); // 日志记录错误
+        return;
+    }
+    // 根据文本是否存在显示或隐藏复选框
+    if (hasText) {
+        mEditTextList.getChildAt(index).findViewById(R.id.cb_edit_item).setVisibility(View.VISIBLE);
+    } else {
+        mEditTextList.getChildAt(index).findViewById(R.id.cb_edit_item).setVisibility(View.GONE);
+    }
+}
+
+public void onCheckListModeChanged(int oldMode, int newMode) {
+    // 检查列表模式改变时的处理
+    if (newMode == TextNote.MODE_CHECK_LIST) {
+        // 切换到检查列表模式
+        switchToListMode(mNoteEditor.getText().toString());
+    } else {
+        // 切换回普通模式
+        if (!getWorkingText()) {
+            mWorkingNote.setWorkingText(mWorkingNote.getContent().replace(TAG_UNCHECKED + " ", ""));
+        }
+        mNoteEditor.setText(getHighlightQueryResult(mWorkingNote.getContent(), mUserQuery)); // 设置高亮文本
+        mEditTextList.setVisibility(View.GONE); // 隐藏编辑列表
+        mNoteEditor.setVisibility(View.VISIBLE); // 显示笔记编辑器
+    }
+}
+
+private boolean getWorkingText() {
+    // 获取当前工作文本
+    boolean hasChecked = false; // 检查是否有选中的项
+    if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {
+        StringBuilder sb = new StringBuilder(); // 创建字符串构建器
+        for (int i = 0; i < mEditTextList.getChildCount(); i++) {
+            View view = mEditTextList.getChildAt(i);
+            NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
+            if (!TextUtils.isEmpty(edit.getText())) {
+                // 根据复选框状态构建文本
+                if (((CheckBox) view.findViewById(R.id.cb_edit_item)).isChecked()) {
+                    sb.append(TAG_CHECKED).append(" ").append(edit.getText()).append("\n");
+                    hasChecked = true; // 标记有选中项
+                } else {
+                    sb.append(TAG_UNCHECKED).append(" ").append(edit.getText()).append("\n");
+                }
+            }
+        }
+        mWorkingNote.setWorkingText(sb.toString()); // 设置工作文本
+    } else {
+        mWorkingNote.setWorkingText(mNoteEditor.getText().toString()); // 设置普通文本
+    }
+    return hasChecked; // 返回是否有选中项
+}
+
+private boolean saveNote() {
+    // 保存当前笔记
+    getWorkingText(); // 获取当前工作文本
+    boolean saved = mWorkingNote.saveNote(); // 保存笔记
+    if (saved) {
+        // 保存成功，设置结果为OK
+        setResult(RESULT_OK);
+    }
+    return saved; // 返回保存结果
+}
+
+private void sendToDesktop() {
+    // 发送笔记到桌面快捷方式
+    if (!mWorkingNote.existInDatabase()) {
+        saveNote(); // 如果笔记不存在，先保存
+    }
+
+    if (mWorkingNote.getNoteId() > 0) { // 确保笔记ID有效
+        Intent sender = new Intent();
+        Intent shortcutIntent = new Intent(this, NoteEditActivity.class);
+        shortcutIntent.setAction(Intent.ACTION_VIEW); // 设置意图动作为查看
+        shortcutIntent.putExtra(Intent.EXTRA_UID, mWorkingNote.getNoteId()); // 传递笔记ID
+        sender.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent); // 设置快捷方式意图
+        sender.putExtra(Intent.EXTRA_SHORTCUT_NAME,
+                makeShortcutIconTitle(mWorkingNote.getContent())); // 设置快捷方式名称
+        sender.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE,
+                Intent.ShortcutIconResource.fromContext(this, R.drawable.icon_app)); // 设置快捷方式图标
+        sender.putExtra("duplicate", true); // 允许重复
+        showToast(R.string.info_note_enter_desktop); // 显示提示
+        sendBroadcast(sender); // 发送广播以创建快捷方式
+    } else {
+        // 如果没有输入内容，提醒用户输入
+        Log.e(TAG, "Send to desktop error");
+        showToast(R.string.error_note_empty_for_send_to_desktop);
+    }
+}
+
+private String makeShortcutIconTitle(String content) {
+    // 创建快捷方式图标标题
+    content = content.replace(TAG_CHECKED, ""); // 去掉已选中标记
+    content = content.replace(TAG_UNCHECKED, ""); // 去掉未选中标记
+    return content.length() > SHORTCUT_ICON_TITLE_MAX_LEN ? content.substring(0,
+            SHORTCUT_ICON_TITLE_MAX_LEN) : content; // 限制标题长度
+}
+
+private void showToast(int resId) {
+    // 显示短时间的Toast
+    showToast(resId, Toast.LENGTH_SHORT);
+}
+
+private void showToast(int resId, int duration) {
+    // 显示指定持续时间的Toast
+    Toast.makeText(this, resId, duration).show();
+}

src/ui/NoteEditText注释.txt

@@ -0,0 +1,195 @@
+package net.micode.notes.ui;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.text.Layout;
+import android.text.Selection;
+import android.text.Spanned;
+import android.text.TextUtils;
+import android.text.style.URLSpan;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.ContextMenu;
+import android.view.KeyEvent;
+import android.view.MenuItem;
+import android.view.MenuItem.OnMenuItemClickListener;
+import android.view.MotionEvent;
+import android.widget.EditText;
+
+import net.micode.notes.R;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class NoteEditText extends EditText {
+    private static final String TAG = "NoteEditText";
+    private int mIndex; // 当前编辑文本的索引
+    private int mSelectionStartBeforeDelete; // 删除前的选择起始位置
+
+    private static final String SCHEME_TEL = "tel:" ;
+    private static final String SCHEME_HTTP = "http:" ;
+    private static final String SCHEME_EMAIL = "mailto:" ;
+
+    // 存储不同链接类型的资源ID
+    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);
+    }
+
+    /**
+     * 用于与 {@link NoteEditActivity} 交互的接口
+     */
+    public interface OnTextViewChangeListener {
+        void onEditTextDelete(int index, String text); // 删除当前编辑文本
+        void onEditTextEnter(int index, String text); // 添加新编辑文本
+        void onTextChange(int index, boolean hasText); // 文本变化时的回调
+    }
+
+    private OnTextViewChangeListener mOnTextViewChangeListener; // 监听器实例
+
+    public NoteEditText(Context context) {
+        super(context, null);
+        mIndex = 0; // 初始化索引
+    }
+
+    public void setIndex(int index) {
+        mIndex = index; // 设置当前索引
+    }
+
+    public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
+        mOnTextViewChangeListener = listener; // 设置监听器
+    }
+
+    public NoteEditText(Context context, AttributeSet attrs) {
+        super(context, attrs, android.R.attr.editTextStyle);
+    }
+
+    public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        // TODO Auto-generated constructor stub
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        switch (event.getAction()) {
+            case MotionEvent.ACTION_DOWN:
+                // 处理触摸事件，设置光标位置
+                int x = (int) event.getX();
+                int y = (int) event.getY();
+                x -= getTotalPaddingLeft();
+                y -= getTotalPaddingTop();
+                x += getScrollX();
+                y += getScrollY();
+
+                Layout layout = getLayout();
+                int line = layout.getLineForVertical(y);
+                int off = layout.getOffsetForHorizontal(line, x);
+                Selection.setSelection(getText(), off); // 设置光标位置
+                break;
+        }
+
+        return super.onTouchEvent(event);
+    }
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch (keyCode) {
+            case KeyEvent.KEYCODE_ENTER:
+                // 处理回车键
+                if (mOnTextViewChangeListener != null) {
+                    return false; // 如果有监听器，返回false
+                }
+                break;
+            case KeyEvent.KEYCODE_DEL:
+                // 处理删除键
+                mSelectionStartBeforeDelete = getSelectionStart(); // 记录删除前的选择位置
+                break;
+            default:
+                break;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
+    @Override
+    public boolean onKeyUp(int keyCode, KeyEvent event) {
+        switch(keyCode) {
+            case KeyEvent.KEYCODE_DEL:
+                // 处理删除键释放事件
+                if (mOnTextViewChangeListener != null) {
+                    if (0 == mSelectionStartBeforeDelete && mIndex != 0) {
+                        mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString());
+                        return true; // 调用删除回调
+                    }
+                } else {
+                    Log.d(TAG, "OnTextViewChangeListener was not set");
+                }
+                break;
+            case KeyEvent.KEYCODE_ENTER:
+                // 处理回车键释放事件
+                if (mOnTextViewChangeListener != null) {
+                    int selectionStart = getSelectionStart();
+                    String text = getText().subSequence(selectionStart, length()).toString();
+                    setText(getText().subSequence(0, selectionStart)); // 设置文本
+                    mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text); // 调用添加回调
+                } else {
+                    Log.d(TAG, "OnTextViewChangeListener was not set");
+                }
+                break;
+            default:
+                break;
+        }
+        return super.onKeyUp(keyCode, event);
+    }
+
+    @Override
+    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
+        // 处理焦点变化
+        if (mOnTextViewChangeListener != null) {
+            if (!focused && TextUtils.isEmpty(getText())) {
+                mOnTextViewChangeListener.onTextChange(mIndex, false); // 文本为空
+            } else {
+                mOnTextViewChangeListener.onTextChange(mIndex, true); // 文本不为空
+            }
+        }
+        super.onFocusChanged(focused, direction, previouslyFocusedRect);
+    }
+
+    @Override
+    protected void onCreateContextMenu(ContextMenu menu) {
+        // 创建上下文菜单
+        if (getText() instanceof Spanned) {
+            int selStart = getSelectionStart();
+            int selEnd = getSelectionEnd();
+
+            int min = Math.min(selStart, selEnd);
+            int max = Math.max(selStart, selEnd);
+
+            final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class);
+            if (urls.length == 1) {
+                int defaultResId = 0;
+                for(String schema: sSchemaActionResMap.keySet()) {
+                    if(urls[0].getURL().indexOf(schema) >= 0) {
+                        defaultResId = sSchemaActionResMap.get(schema);
+                        break;
+                    }
+                }
+
+                if (defaultResId == 0) {
+                    defaultResId = R.string.note_link_other; // 默认链接类型
+                }
+
+                menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener(
+                        new OnMenuItemClickListener() {
+                            public boolean onMenuItemClick(MenuItem item) {
+                                // 点击菜单项时打开链接
+                                urls[0].onClick(NoteEditText.this);
+                                return true;
+                            }
+                        });
+            }
+        }
+        super.onCreateContextMenu(menu);
+    }
+}

src/ui/NoteItemData注释.txt

@@ -0,0 +1,215 @@
+package net.micode.notes.ui;
+
+import android.content.Context;
+import android.database.***;
+import android.text.TextUtils;
+
+import net.micode.notes.data.Contact;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.tool.DataUtils;
+
+public class NoteItemData {
+    static final String [] PROJECTION = new String [] {
+        NoteColumns.ID,
+        NoteColumns.ALERTED_DATE,
+        NoteColumns.BG_COLOR_ID,
+        NoteColumns.CREATED_DATE,
+        NoteColumns.HAS_ATTACHMENT,
+        NoteColumns.MODIFIED_DATE,
+        NoteColumns.NOTES_COUNT,
+        NoteColumns.PARENT_ID,
+        NoteColumns.SNIPPET,
+        NoteColumns.TYPE,
+        NoteColumns.WIDGET_ID,
+        NoteColumns.WIDGET_TYPE,
+    };
+
+    // 列索引常量
+    private static final int ID_COLUMN                    = 0;
+    private static final int ALERTED_DATE_COLUMN          = 1;
+    private static final int BG_COLOR_ID_COLUMN           = 2;
+    private static final int CREATED_DATE_COLUMN          = 3;
+    private static final int HAS_ATTACHMENT_COLUMN        = 4;
+    private static final int MODIFIED_DATE_COLUMN         = 5;
+    private static final int NOTES_COUNT_COLUMN           = 6;
+    private static final int PARENT_ID_COLUMN             = 7;
+    private static final int SNIPPET_COLUMN               = 8;
+    private static final int TYPE_COLUMN                  = 9;
+    private static final int WIDGET_ID_COLUMN             = 10;
+    private static final int WIDGET_TYPE_COLUMN           = 11;
+
+    // NoteItemData 的属性
+    private long mId; // 记录ID
+    private long mAlertDate; // 提醒日期
+    private int mBgColorId; // 背景颜色ID
+    private long mCreatedDate; // 创建日期
+    private boolean mHasAttachment; // 是否有附件
+    private long mModifiedDate; // 修改日期
+    private int mNotesCount; // 记录数量
+    private long mParentId; // 父ID
+    private String mSnippet; // 摘要
+    private int mType; // 类型
+    private int mWidgetId; // 小部件ID
+    private int mWidgetType; // 小部件类型
+    private String mName; // 联系人名称
+    private String mPhoneNumber; // 联系电话
+
+    // 状态标志
+    private boolean mIsLastItem; // 是否为最后一项
+    private boolean mIsFirstItem; // 是否为第一项
+    private boolean mIsOnlyOneItem; // 是否只有一项
+    private boolean mIsOneNoteFollowingFolder; // 是否有一个笔记跟随文件夹
+    private boolean mIsMultiNotesFollowingFolder; // 是否有多个笔记跟随文件夹
+
+    public NoteItemData(Context context, *** cursor) {
+        // 从***中读取数据并初始化属性
+        mId = cursor.getLong(ID_COLUMN);
+        mAlertDate = cursor.getLong(ALERTED_DATE_COLUMN);
+        mBgColorId = cursor.getInt(BG_COLOR_ID_COLUMN);
+        mCreatedDate = cursor.getLong(CREATED_DATE_COLUMN);
+        mHasAttachment = (cursor.getInt(HAS_ATTACHMENT_COLUMN) > 0);
+        mModifiedDate = cursor.getLong(MODIFIED_DATE_COLUMN);
+        mNotesCount = cursor.getInt(NOTES_COUNT_COLUMN);
+        mParentId = cursor.getLong(PARENT_ID_COLUMN);
+        mSnippet = cursor.getString(SNIPPET_COLUMN);
+        mSnippet = mSnippet.replace(NoteEditActivity.TAG_CHECKED, "").replace(
+                NoteEditActivity.TAG_UNCHECKED, "");
+        mType = cursor.getInt(TYPE_COLUMN);
+        mWidgetId = cursor.getInt(WIDGET_ID_COLUMN);
+        mWidgetType = cursor.getInt(WIDGET_TYPE_COLUMN);
+
+        mPhoneNumber = "";
+        // 如果父ID是通话记录文件夹，获取电话号码和联系人名称
+        if (mParentId == Notes.ID_CALL_RECORD_FOLDER) {
+            mPhoneNumber = DataUtils.getCallNumberByNoteId(context.getContentResolver(), mId);
+            if (!TextUtils.isEmpty(mPhoneNumber)) {
+                mName = Contact.getContact(context, mPhoneNumber);
+                if (mName == null) {
+                    mName = mPhoneNumber; // 如果没有找到联系人，使用电话号码
+                }
+            }
+        }
+
+        if (mName == null) {
+            mName = ""; // 确保名称不为null
+        }
+        checkPostion(cursor); // 检查位置
+    }
+
+    private void checkPostion(*** cursor) {
+        // 检查当前项在***中的位置
+        mIsLastItem = cursor.isLast();
+        mIsFirstItem = cursor.isFirst();
+        mIsOnlyOneItem = (cursor.getCount() == 1);
+        mIsMultiNotesFollowingFolder = false;
+        mIsOneNoteFollowingFolder = false;
+
+        // 如果当前项是笔记且不是第一项，检查前一项
+        if (mType == Notes.TYPE_NOTE && !mIsFirstItem) {
+            int position = cursor.getPosition();
+            if (cursor.moveToPrevious()) {
+                if (cursor.getInt(TYPE_COLUMN) == Notes.TYPE_FOLDER
+                        || cursor.getInt(TYPE_COLUMN) == Notes.TYPE_SYSTEM) {
+                    if (cursor.getCount() > (position + 1)) {
+                        mIsMultiNotesFollowingFolder = true; // 多个笔记跟随文件夹
+                    } else {
+                        mIsOneNoteFollowingFolder = true; // 一个笔记跟随文件夹
+                    }
+                }
+                if (!cursor.moveToNext()) {
+                    throw new IllegalStateException("cursor move to previous but can't move back");
+                }
+            }
+        }
+    }
+
+    // Getter方法
+    public boolean isOneFollowingFolder() {
+        return mIsOneNoteFollowingFolder;
+    }
+
+    public boolean isMultiFollowingFolder() {
+        return mIsMultiNotesFollowingFolder;
+    }
+
+    public boolean isLast() {
+        return mIsLastItem;
+    }
+
+    public String getCallName() {
+        return mName;
+    }
+
+    public boolean isFirst() {
+        return mIsFirstItem;
+    }
+
+    public boolean isSingle() {
+        return mIsOnlyOneItem;
+    }
+
+    public long getId() {
+        return mId;
+    }
+
+    public long getAlertDate() {
+        return mAlertDate;
+    }
+
+    public long getCreatedDate() {
+        return mCreatedDate;
+    }
+
+    public boolean hasAttachment() {
+        return mHasAttachment;
+    }
+
+    public long getModifiedDate() {
+        return mModifiedDate;
+    }
+
+    public int getBgColorId() {
+        return mBgColorId;
+    }
+
+    public long getParentId() {
+        return mParentId;
+    }
+
+    public int getNotesCount() {
+        return mNotesCount;
+    }
+
+    public long getFolderId () {
+        return mParentId;
+    }
+
+    public int getType() {
+        return mType;
+    }
+
+    public int getWidgetType() {
+        return mWidgetType;
+    }
+
+    public int getWidgetId() {
+        return mWidgetId;
+    }
+
+    public String getSnippet() {
+        return mSnippet;
+    }
+
+    public boolean hasAlert() {
+        return (mAlertDate > 0);
+    }
+
+    public boolean isCallRecord() {
+        return (mParentId == Notes.ID_CALL_RECORD_FOLDER && !TextUtils.isEmpty(mPhoneNumber));
+    }
+
+    public static int getNoteType(*** cursor) {
+        return cursor.getInt(TYPE_COLUMN);
+    }
+}

src/ui/NotesListActivity注释.txt

@@ -0,0 +1,665 @@
+package net.micode.notes.ui;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.appwidget.AppWidgetManager;
+import android.content.AsyncQueryHandler;
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.database.***;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.text.Editable;
+import android.text.TextUtils;
+import android.text.TextWatcher;
+import android.util.Log;
+import android.view.ActionMode;
+import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
+import android.view.Display;
+import android.view.HapticFeedbackConstants;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.MenuItem.OnMenuItemClickListener;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.View.OnCreateContextMenuListener;
+import android.view.View.OnTouchListener;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.AdapterView.OnItemLongClickListener;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ListView;
+import android.widget.PopupMenu;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.remote.GTaskSyncService;
+import net.micode.notes.model.WorkingNote;
+import net.micode.notes.tool.BackupUtils;
+import net.micode.notes.tool.DataUtils;
+import net.micode.notes.tool.ResourceParser;
+import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;
+import net.micode.notes.widget.NoteWidgetProvider_2x;
+import net.micode.notes.widget.NoteWidgetProvider_4x;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.HashSet;
+
+public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {
+    private static final int FOLDER_NOTE_LIST_QUERY_TOKEN = 0;
+    private static final int FOLDER_LIST_QUERY_TOKEN      = 1;
+    private static final int MENU_FOLDER_DELETE = 0;
+    private static final int MENU_FOLDER_VIEW = 1;
+    private static final int MENU_FOLDER_CHANGE_NAME = 2;
+    private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction";
+
+    private enum ListEditState {
+        NOTE_LIST, SUB_FOLDER, CALL_RECORD_FOLDER
+    };
+
+    private ListEditState mState;
+    private BackgroundQueryHandler mBackgroundQueryHandler;
+    private NotesListAdapter mNotesListAdapter;
+    private ListView mNotesListView;
+    private Button mAddNewNote;
+    private boolean mDispatch;
+    private int mOriginY;
+    private int mDispatchY;
+    private TextView mTitleBar;
+    private long mCurrentFolderId;
+    private ContentResolver mContentResolver;
+    private ModeCallback mModeCallBack;
+    private static final String TAG = "NotesListActivity";
+    public static final int NOTES_LISTVIEW_SCROLL_RATE = 30;
+    private NoteItemData mFocusNoteDataItem;
+
+    private static final String NORMAL_SELECTION = NoteColumns.PARENT_ID + "=?";
+    private static final String ROOT_FOLDER_SELECTION = "(" + NoteColumns.TYPE + "<>"
+            + Notes.TYPE_SYSTEM + " AND " + NoteColumns.PARENT_ID + "=?)" + " OR ("
+            + NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER + " AND "
+            + NoteColumns.NOTES_COUNT + ">0)";
+
+    private final static int REQUEST_CODE_OPEN_NODE = 102;
+    private final static int REQUEST_CODE_NEW_NODE  = 103;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.note_list);
+        initResources();
+
+        /**
+         * Insert an introduction when user first uses this application
+         */
+        setAppInfoFromRawRes();
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        if (resultCode == RESULT_OK
+                && (requestCode == REQUEST_CODE_OPEN_NODE || requestCode == REQUEST_CODE_NEW_NODE)) {
+            mNotesListAdapter.changeCursor(null); // 更新适配器的光标
+        } else {
+            super.onActivityResult(requestCode, resultCode, data);
+        }
+    }
+
+    private void setAppInfoFromRawRes() {
+        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);
+                if (in != null) {
+                    InputStreamReader isr = new InputStreamReader(in);
+                    BufferedReader br = new BufferedReader(isr);
+                    char [] buf = new char[1024];
+                    int len = 0;
+                    while ((len = br.read(buf)) > 0) {
+                        sb.append(buf, 0, len); // 读取介绍内容
+                    }
+                } else {
+                    Log.e(TAG, "Read introduction file error");
+                    return;
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+                return;
+            } finally {
+                if(in != null) {
+                    try {
+                        in.close(); // 关闭输入流
+                    } catch (IOException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+
+            // 创建并保存介绍笔记
+            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()) {
+                sp.edit().putBoolean(PREFERENCE_ADD_INTRODUCTION, true).commit(); // 更新偏好设置
+            } else {
+                Log.e(TAG, "Save introduction note error");
+                return;
+            }
+        }
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+        startAsyncNotesListQuery(); // 启动异步查询
+    }
+
+    private void initResources() {
+        mContentResolver = this.getContentResolver();
+        mBackgroundQueryHandler = new BackgroundQueryHandler(this.getContentResolver());
+        mCurrentFolderId = Notes.ID_ROOT_FOLDER;
+        mNotesListView = (ListView) findViewById(R.id.notes_list);
+        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.setOnClickListener(this);
+        mAddNewNote.setOnTouchListener(new NewNoteOnTouchListener());
+        mDispatch = false;
+        mDispatchY = 0;
+        mOriginY = 0;
+        mTitleBar = (TextView) findViewById(R.id.tv_title_bar);
+        mState = ListEditState.NOTE_LIST;
+        mModeCallBack = new ModeCallback();
+    }
+
+    private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener {
+        private DropdownMenu mDropDownMenu;
+        private ActionMode mActionMode;
+        private MenuItem mMoveMenu;
+
+        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+            getMenuInflater().inflate(R.menu.note_list_options, menu);
+            menu.findItem(R.id.delete).setOnMenuItemClickListener(this);
+            mMoveMenu = menu.findItem(R.id.move);
+            // 根据条件设置移动菜单的可见性
+            if (mFocusNoteDataItem.getParentId() == Notes.ID_CALL_RECORD_FOLDER
+                    || DataUtils.getUserFolderCount(mContentResolver) == 0) {
+                mMoveMenu.setVisible(false);
+            } else {
+                mMoveMenu.setVisible(true);
+                mMoveMenu.setOnMenuItemClickListener(this);
+            }
+            mActionMode = mode;
+            mNotesListAdapter.setChoiceMode(true);
+            mNotesListView.setLongClickable(false);
+            mAddNewNote.setVisibility(View.GONE); // 隐藏添加新笔记按钮
+
+            View customView = LayoutInflater.from(NotesListActivity.this).inflate(
+                    R.layout.note_list_dropdown_menu, null);
+            mode.setCustomView(customView);
+            mDropDownMenu = new DropdownMenu(NotesListActivity.this,
+                    (Button) customView.findViewById(R.id.selection_menu),
+                    R.menu.note_list_dropdown);
+            mDropDownMenu.setOnDropdownMenuItemClickListener(new PopupMenu.OnMenuItemClickListener(){
+                public boolean onMenuItemClick(MenuItem item) {
+                    mNotesListAdapter.selectAll(!mNotesListAdapter.isAllSelected()); // 切换全选状态
+                    updateMenu(); // 更新菜单
+                    return true;
+                }
+            });
+            return true;
+        }
+
+        private void updateMenu() {
+            int selectedCount = mNotesListAdapter.getSelectedCount();
+            // 更新下拉菜单
+            String format = getResources().getString(R.string.menu_select_title, selectedCount);
+            mDropDownMenu.setTitle(format);
+            MenuItem item = mDropDownMenu.findItem(R.id.action_select_all);
+            if (item != null) {
+                if (mNotesListAdapter.isAllSelected()) {
+                    item.setChecked(true);
+                    item.setTitle(R.string.menu_deselect_all);
+                } else {
+                    item.setChecked(false);
+                    item.setTitle(R.string.menu_select_all);
+                }
+            }
+        }
+private void showCreateOrModifyFolderDialog(final boolean create) {
+    final AlertDialog.Builder builder = new AlertDialog.Builder(this);
+    
+    // ActionMode的回调方法
+    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+        // TODO Auto-generated method stub
+        return false;
+    }
+
+    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+        // TODO Auto-generated method stub
+        return false;
+    }
+
+    public void onDestroyActionMode(ActionMode mode) {
+        mNotesListAdapter.setChoiceMode(false);
+        mNotesListView.setLongClickable(true);
+        mAddNewNote.setVisibility(View.VISIBLE);
+    }
+
+    public void finishActionMode() {
+        mActionMode.finish();
+    }
+
+    public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
+        mNotesListAdapter.setCheckedItem(position, checked);
+        updateMenu();
+    }
+
+    public boolean onMenuItemClick(MenuItem item) {
+        if (mNotesListAdapter.getSelectedCount() == 0) {
+            Toast.makeText(NotesListActivity.this, getString(R.string.menu_select_none), Toast.LENGTH_SHORT).show();
+            return true;
+        }
+
+        switch (item.getItemId()) {
+            case R.id.delete:
+                AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
+                builder.setTitle(getString(R.string.alert_title_delete));
+                builder.setIcon(android.R.drawable.ic_dialog_alert);
+                builder.setMessage(getString(R.string.alert_message_delete_notes, mNotesListAdapter.getSelectedCount()));
+                builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int which) {
+                        batchDelete(); // 批量删除选中的笔记
+                    }
+                });
+                builder.setNegativeButton(android.R.string.cancel, null);
+                builder.show();
+                break;
+            case R.id.move:
+                startQueryDestinationFolders(); // 查询目标文件夹
+                break;
+            default:
+                return false;
+        }
+        return true;
+    }
+
+    // 创建或修改文件夹的对话框视图
+    View view = LayoutInflater.from(this).inflate(R.layout.dialog_edit_text, null);
+    final EditText etName = (EditText) view.findViewById(R.id.et_foler_name);
+    showSoftInput(); // 显示软键盘
+
+    if (!create) {
+        if (mFocusNoteDataItem != null) {
+            etName.setText(mFocusNoteDataItem.getSnippet()); // 设置当前文件夹名称
+            builder.setTitle(getString(R.string.menu_folder_change_name));
+        } else {
+            Log.e(TAG, "The long click data item is null");
+            return;
+        }
+    } else {
+        etName.setText(""); // 新建文件夹时清空输入框
+        builder.setTitle(this.getString(R.string.menu_create_folder));
+    }
+
+    builder.setPositiveButton(android.R.string.ok, null);
+    builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+        public void onClick(DialogInterface dialog, int which) {
+            hideSoftInput(etName); // 隐藏软键盘
+        }
+    });
+
+    final Dialog dialog = builder.setView(view).show();
+    final Button positive = (Button) dialog.findViewById(android.R.id.button1);
+    positive.setOnClickListener(new OnClickListener() {
+        public void onClick(View v) {
+            hideSoftInput(etName); // 隐藏软键盘
+            String name = etName.getText().toString();
+            if (DataUtils.checkVisibleFolderName(mContentResolver, name)) {
+                Toast.makeText(NotesListActivity.this, getString(R.string.folder_exist, name), Toast.LENGTH_LONG).show();
+                etName.setSelection(0, etName.length()); // 重新选择文本
+                return;
+            }
+            if (!create) {
+                if (!TextUtils.isEmpty(name)) {
+                    ContentValues values = new ContentValues();
+                    values.put(NoteColumns.SNIPPET, name);
+                    values.put(NoteColumns.TYPE, Notes.TYPE_FOLDER);
+                    values.put(NoteColumns.LOCAL_MODIFIED, 1);
+                    mContentResolver.update(Notes.CONTENT_NOTE_URI, values, NoteColumns.ID + "=?", new String[] {
+                        String.valueOf(mFocusNoteDataItem.getId())
+                    });
+                }
+            } else if (!TextUtils.isEmpty(name)) {
+                ContentValues values = new ContentValues();
+                values.put(NoteColumns.SNIPPET, name);
+                values.put(NoteColumns.TYPE, Notes.TYPE_FOLDER);
+                mContentResolver.insert(Notes.CONTENT_NOTE_URI, values); // 插入新文件夹
+            }
+            dialog.dismiss(); // 关闭对话框
+        }
+    });
+}
+if (TextUtils.isEmpty(etName.getText())) {
+    positive.setEnabled(false); // 如果输入框为空，禁用确认按钮
+}
+/**
+ * 当名称编辑框为空时，禁用确认按钮
+ */
+etName.addTextChangedListener(new TextWatcher() {
+    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+        // TODO Auto-generated method stub
+    }
+
+    public void onTextChanged(CharSequence s, int start, int before, int count) {
+        // 根据输入框内容启用或禁用确认按钮
+        if (TextUtils.isEmpty(etName.getText())) {
+            positive.setEnabled(false);
+        } else {
+            positive.setEnabled(true);
+        }
+    }
+
+    public void afterTextChanged(Editable s) {
+        // TODO Auto-generated method stub
+    }
+});
+
+@Override
+public void onBackPressed() {
+    switch (mState) {
+        case SUB_FOLDER:
+            mCurrentFolderId = Notes.ID_ROOT_FOLDER;
+            mState = ListEditState.NOTE_LIST;
+            startAsyncNotesListQuery(); // 查询笔记列表
+            mTitleBar.setVisibility(View.GONE);
+            break;
+        case CALL_RECORD_FOLDER:
+            mCurrentFolderId = Notes.ID_ROOT_FOLDER;
+            mState = ListEditState.NOTE_LIST;
+            mAddNewNote.setVisibility(View.VISIBLE);
+            mTitleBar.setVisibility(View.GONE);
+            startAsyncNotesListQuery(); // 查询笔记列表
+            break;
+        case NOTE_LIST:
+            super.onBackPressed(); // 调用父类的返回处理
+            break;
+        default:
+            break;
+    }
+}
+
+private void updateWidget(int appWidgetId, int appWidgetType) {
+    Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
+    if (appWidgetType == Notes.TYPE_WIDGET_2X) {
+        intent.setClass(this, NoteWidgetProvider_2x.class);
+    } else if (appWidgetType == Notes.TYPE_WIDGET_4X) {
+        intent.setClass(this, NoteWidgetProvider_4x.class);
+    } else {
+        Log.e(TAG, "Unsupported widget type");
+        return;
+    }
+
+    intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] { appWidgetId });
+    sendBroadcast(intent); // 发送更新小部件的广播
+    setResult(RESULT_OK, intent); // 设置结果为成功
+}
+
+private final OnCreateContextMenuListener mFolderOnCreateContextMenuListener = new OnCreateContextMenuListener() {
+    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
+        if (mFocusNoteDataItem != null) {
+            menu.setHeaderTitle(mFocusNoteDataItem.getSnippet());
+            menu.add(0, MENU_FOLDER_VIEW, 0, R.string.menu_folder_view);
+            menu.add(0, MENU_FOLDER_DELETE, 0, R.string.menu_folder_delete);
+            menu.add(0, MENU_FOLDER_CHANGE_NAME, 0, R.string.menu_folder_change_name);
+        }
+    }
+};
+
+@Override
+public void onContextMenuClosed(Menu menu) {
+    if (mNotesListView != null) {
+        mNotesListView.setOnCreateContextMenuListener(null); // 清除上下文菜单监听器
+    }
+    super.onContextMenuClosed(menu);
+}
+
+@Override
+public boolean onContextItemSelected(MenuItem item) {
+    if (mFocusNoteDataItem == null) {
+        Log.e(TAG, "The long click data item is null");
+        return false;
+    }
+    switch (item.getItemId()) {
+        case MENU_FOLDER_VIEW:
+            openFolder(mFocusNoteDataItem); // 打开文件夹
+            break;
+        case MENU_FOLDER_DELETE:
+            AlertDialog.Builder builder = new AlertDialog.Builder(this);
+            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));
+            builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface dialog, int which) {
+                    deleteFolder(mFocusNoteDataItem.getId()); // 删除文件夹
+                }
+            });
+            builder.setNegativeButton(android.R.string.cancel, null);
+            builder.show();
+            break;
+        case MENU_FOLDER_CHANGE_NAME:
+            showCreateOrModifyFolderDialog(false); // 显示修改文件夹名称对话框
+            break;
+        default:
+            break;
+    }
+
+    return true;
+}
+
+@Override
+public boolean onPrepareOptionsMenu(Menu menu) {
+    menu.clear(); // 清空菜单
+    if (mState == ListEditState.NOTE_LIST) {
+        getMenuInflater().inflate(R.menu.note_list, menu);
+        // 设置同步或取消同步
+        menu.findItem(R.id.menu_sync).setTitle(
+                GTaskSyncService.isSyncing() ? R.string.menu_sync_cancel : R.string.menu_sync);
+    } else if (mState == ListEditState.SUB_FOLDER) {
+        getMenuInflater().inflate(R.menu.sub_folder, menu);
+    } else if (mState == ListEditState.CALL_RECORD_FOLDER) {
+        getMenuInflater().inflate(R.menu.call_record_folder, menu);
+    } else {
+        Log.e(TAG, "Wrong state:" + mState);
+    }
+    return true;
+}
+
+@Override
+public boolean onOptionsItemSelected(MenuItem item) {
+    switch (item.getItemId()) {
+        case R.id.menu_new_folder: {
+            showCreateOrModifyFolderDialog(true); // 显示创建新文件夹对话框
+            break;
+        }
+        case R.id.menu_export_text: {
+            exportNoteToText(); // 导出笔记为文本
+            break;
+        }
+        case R.id.menu_sync: {
+            if (isSyncMode()) {
+                if (TextUtils.equals(item.getTitle(), getString(R.string.menu_sync))) {
+                    GTaskSyncService.startSync(this); // 开始同步
+                } else {
+                    GTaskSyncService.cancelSync(this); // 取消同步
+                }
+            } else {
+                startPreferenceActivity(); // 启动设置活动
+            }
+            break;
+        }
+        case R.id.menu_setting: {
+            startPreferenceActivity(); // 启动设置活动
+            break;
+        }
+        case R.id.menu_new_note: {
+            createNewNote(); // 创建新笔记
+            break;
+        }
+        case R.id.menu_search:
+            onSearchRequested(); // 请求搜索
+            break;
+        default:
+            break;
+    }
+    return true;
+}
+
+@Override
+public boolean onSearchRequested() {
+    startSearch(null, false, null /* appData */, false); // 启动搜索
+    return true;
+}
+
+private void exportNoteToText() {
+    final BackupUtils backup = BackupUtils.getInstance(NotesListActivity.this);
+    new AsyncTask<Void, Void, Integer>() {
+
+        @Override
+        protected Integer doInBackground(Void... unused) {
+            return backup.exportToText(); // 导出笔记到文本
+        }
+
+        @Override
+        protected void onPostExecute(Integer result) {
+            // 根据导出结果显示相应的对话框
+            if (result == BackupUtils.STATE_SD_CARD_UNMOUONTED) {
+                AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
+                builder.setTitle(NotesListActivity.this.getString(R.string.failed_sdcard_export));
+                builder.setMessage(NotesListActivity.this.getString(R.string.error_sdcard_unmounted));
+                builder.setPositiveButton(android.R.string.ok, null);
+                builder.show();
+            } else if (result == BackupUtils.STATE_SUCCESS) {
+                AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
+                builder.setTitle(NotesListActivity.this.getString(R.string.success_sdcard_export));
+                builder.setMessage(NotesListActivity.this.getString(
+                        R.string.format_exported_file_location, backup.getExportedTextFileName(), backup.getExportedTextFileDir()));
+                builder.setPositiveButton(android.R.string.ok, null);
+                builder.show();
+            } else if (result == BackupUtils.STATE_SYSTEM_ERROR) {
+                AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
+                builder.setTitle(NotesListActivity.this.getString(R.string.failed_sdcard_export));
+                builder.setMessage(NotesListActivity.this.getString(R.string.error_sdcard_export));
+                builder.setPositiveButton(android.R.string.ok, null);
+                builder.show();
+            }
+        }
+
+    }.execute();
+}
+
+private boolean isSyncMode() {
+    return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0; // 检查是否在同步模式
+}
+
+private void startPreferenceActivity() {
+    Activity from = getParent() != null ? getParent() : this;
+    Intent intent = new Intent(from, NotesPreferenceActivity.class);
+    from.startActivityIfNeeded(intent, -1); // 启动设置活动
+}
+
+private class OnListItemClickListener implements OnItemClickListener {
+
+    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+        if (view instanceof NotesListItem) {
+            NoteItemData item = ((NotesListItem) view).getItemData();
+            if (mNotesListAdapter.isInChoiceMode()) {
+                if (item.getType() == Notes.TYPE_NOTE) {
+                    position = position - mNotesListView.getHeaderViewsCount();
+                    mModeCallBack.onItemCheckedStateChanged(null, position, id, !mNotesListAdapter.isSelectedItem(position));
+                }
+                return;
+            }
+
+            switch (mState) {
+                case NOTE_LIST:
+                    if (item.getType() == Notes.TYPE_FOLDER || item.getType() == Notes.TYPE_SYSTEM) {
+                        openFolder(item); // 打开文件夹
+                    } else if (item.getType() == Notes.TYPE_NOTE) {
+ openNode(item); // 打开笔记
+                    } else {
+                        Log.e(TAG, "Wrong note type in NOTE_LIST");
+                    }
+                    break;
+                case SUB_FOLDER:
+                case CALL_RECORD_FOLDER:
+                    if (item.getType() == Notes.TYPE_NOTE) {
+                        openNode(item); // 打开笔记
+                    } else {
+                        Log.e(TAG, "Wrong note type in SUB_FOLDER");
+                    }
+                    break;
+                default:
+                    break;
+            }
+        }
+    }
+}
+
+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 + ")";
+
+    mBackgroundQueryHandler.startQuery(FOLDER_LIST_QUERY_TOKEN,
+            null,
+            Notes.CONTENT_NOTE_URI,
+            FoldersListAdapter.PROJECTION,
+            selection,
+            new String[] {
+                    String.valueOf(Notes.TYPE_FOLDER),
+                    String.valueOf(Notes.ID_TRASH_FOLDER),
+                    String.valueOf(mCurrentFolderId)
+            },
+            NoteColumns.MODIFIED_DATE + " DESC"); // 按修改日期降序查询文件夹
+}
+
+public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
+    if (view instanceof NotesListItem) {
+        mFocusNoteDataItem = ((NotesListItem) view).getItemData();
+        if (mFocusNoteDataItem.getType() == Notes.TYPE_NOTE && !mNotesListAdapter.isInChoiceMode()) {
+            if (mNotesListView.startActionMode(mModeCallBack) != null) {
+                mModeCallBack.onItemCheckedStateChanged(null, position, id, true); // 进入选择模式
+                mNotesListView.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); // 触觉反馈
+            } else {
+                Log.e(TAG, "startActionMode fails");
+            }
+        } else if (mFocusNoteDataItem.getType() == Notes.TYPE_FOLDER) {
+            mNotesListView.setOnCreateContextMenuListener(mFolderOnCreateContextMenuListener); // 设置上下文菜单监听器
+        }
+    }
+    return false; // 返回false以允许其他处理
+}

src/ui/NotesListAdapter注释.txt

@@ -0,0 +1,164 @@
+package net.micode.notes.ui;
+
+import android.content.Context;
+import android.database.***;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.***Adapter;
+
+import net.micode.notes.data.Notes;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+
+public class NotesListAdapter extends ***Adapter {
+    private static final String TAG = "NotesListAdapter";
+    private Context mContext;
+    private HashMap<Integer, Boolean> mSelectedIndex; // 存储选中项的索引
+    private int mNotesCount; // 笔记数量
+    private boolean mChoiceMode; // 选择模式
+
+    public static class AppWidgetAttribute {
+        public int widgetId; // 小部件ID
+        public int widgetType; // 小部件类型
+    };
+
+    public NotesListAdapter(Context context) {
+        super(context, null);
+        mSelectedIndex = new HashMap<Integer, Boolean>();
+        mContext = context;
+        mNotesCount = 0; // 初始化笔记数量
+    }
+
+    @Override
+    public View newView(Context context, *** cursor, ViewGroup parent) {
+        return new NotesListItem(context); // 创建新的视图
+    }
+
+    @Override
+    public void bindView(View view, Context context, *** cursor) {
+        if (view instanceof NotesListItem) {
+            NoteItemData itemData = new NoteItemData(context, cursor);
+            ((NotesListItem) view).bind(context, itemData, mChoiceMode,
+                    isSelectedItem(cursor.getPosition())); // 绑定数据到视图
+        }
+    }
+
+    public void setCheckedItem(final int position, final boolean checked) {
+        mSelectedIndex.put(position, checked); // 设置选中状态
+        notifyDataSetChanged(); // 通知数据集已更改
+    }
+
+    public boolean isInChoiceMode() {
+        return mChoiceMode; // 返回当前是否在选择模式
+    }
+
+    public void setChoiceMode(boolean mode) {
+        mSelectedIndex.clear(); // 清空选中项
+        mChoiceMode = mode; // 设置选择模式
+    }
+
+    public void selectAll(boolean checked) {
+        *** cursor = getCursor();
+        for (int i = 0; i < getCount(); i++) {
+            if (cursor.moveToPosition(i)) {
+                if (NoteItemData.getNoteType(cursor) == Notes.TYPE_NOTE) {
+                    setCheckedItem(i, checked); // 选择或取消选择所有笔记
+                }
+            }
+        }
+    }
+
+    public HashSet<Long> getSelectedItemIds() {
+        HashSet<Long> itemSet = new HashSet<Long>();
+        for (Integer position : mSelectedIndex.keySet()) {
+            if (mSelectedIndex.get(position) == true) {
+                Long id = getItemId(position);
+                if (id == Notes.ID_ROOT_FOLDER) {
+                    Log.d(TAG, "Wrong item id, should not happen");
+                } else {
+                    itemSet.add(id); // 添加选中项的ID
+                }
+            }
+        }
+        return itemSet; // 返回选中项的ID集合
+    }
+
+    public HashSet<AppWidgetAttribute> getSelectedWidget() {
+        HashSet<AppWidgetAttribute> itemSet = new HashSet<AppWidgetAttribute>();
+        for (Integer position : mSelectedIndex.keySet()) {
+            if (mSelectedIndex.get(position) == true) {
+                *** c = (***) getItem(position);
+                if (c != null) {
+                    AppWidgetAttribute widget = new AppWidgetAttribute();
+                    NoteItemData item = new NoteItemData(mContext, c);
+                    widget.widgetId = item.getWidgetId(); // 获取小部件ID
+                    widget.widgetType = item.getWidgetType(); // 获取小部件类型
+                    itemSet.add(widget);
+                    // 不要在这里关闭游标，只有适配器可以关闭它
+                } else {
+                    Log.e(TAG, "Invalid cursor");
+                    return null; // 如果游标无效，返回null
+                }
+            }
+        }
+        return itemSet; // 返回选中小部件的集合
+    }
+
+    public int getSelectedCount() {
+        Collection<Boolean> values = mSelectedIndex.values();
+        if (null == values) {
+            return 0; // 如果没有值，返回0
+        }
+        Iterator<Boolean> iter = values.iterator();
+        int count = 0;
+        while (iter.hasNext()) {
+            if (true == iter.next()) {
+                count++; // 计算选中项的数量
+            }
+        }
+        return count; // 返回选中项的数量
+    }
+
+    public boolean isAllSelected() {
+        int checkedCount = getSelectedCount();
+        return (checkedCount != 0 && checkedCount == mNotesCount); // 检查是否所有项都被选中
+    }
+
+    public boolean isSelectedItem(final int position) {
+        if (null == mSelectedIndex.get(position)) {
+            return false; // 如果该位置没有选中状态，返回false
+        }
+        return mSelectedIndex.get(position); // 返回该位置的选中状态
+    }
+
+    @Override
+    protected void onContentChanged() {
+        super.onContentChanged();
+        calcNotesCount(); // 内容更改时计算笔记数量
+    }
+
+    @Override
+    public void changeCursor(*** cursor) {
+        super.changeCursor(cursor);
+        calcNotesCount(); // 更改游标时计算笔记数量
+    }
+
+    private void calcNotesCount() {
+        mNotesCount = 0; // 初始化笔记数量
+        for (int i = 0; i < getCount(); i++) {
+            *** c = (***) getItem(i);
+            if (c != null) {
+                if (NoteItemData.getNoteType(c) == Notes.TYPE_NOTE) {
+                    mNotesCount++; // 计算笔记数量
+                }
+            } else {
+                Log.e(TAG, "Invalid cursor");
+                return; // 如果游标无效，返回
+            }
+        }
+    }
+}

src/ui/NotesListItem注释.txt

@@ -0,0 +1,105 @@
+package net.micode.notes.ui;
+
+import android.content.Context;
+import android.text.format.DateUtils;
+import android.view.View;
+import android.widget.CheckBox;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.tool.DataUtils;
+import net.micode.notes.tool.ResourceParser.NoteItemBgResources;
+
+public class NotesListItem extends LinearLayout {
+    private ImageView mAlert; // 警告图标
+    private TextView mTitle; // 笔记标题
+    private TextView mTime; // 修改时间
+    private TextView mCallName; // 通话名称
+    private NoteItemData mItemData; // 笔记项数据
+    private CheckBox mCheckBox; // 选择框
+
+    public NotesListItem(Context context) {
+        super(context);
+        inflate(context, R.layout.note_item, this); // 加载布局
+        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);
+    }
+
+    public void bind(Context context, NoteItemData data, boolean choiceMode, boolean checked) {
+        if (choiceMode && data.getType() == Notes.TYPE_NOTE) {
+            mCheckBox.setVisibility(View.VISIBLE); // 显示选择框
+            mCheckBox.setChecked(checked); // 设置选择框状态
+        } else {
+            mCheckBox.setVisibility(View.GONE); // 隐藏选择框
+        }
+
+        mItemData = data; // 绑定数据
+        if (data.getId() == Notes.ID_CALL_RECORD_FOLDER) {
+            mCallName.setVisibility(View.GONE); // 隐藏通话名称
+            mAlert.setVisibility(View.VISIBLE); // 显示警告图标
+            mTitle.setTextAppearance(context, R.style.TextAppearancePrimaryItem);
+            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); // 设置警告图标
+        } else if (data.getParentId() == Notes.ID_CALL_RECORD_FOLDER) {
+            mCallName.setVisibility(View.VISIBLE); // 显示通话名称
+            mCallName.setText(data.getCallName());
+            mTitle.setTextAppearance(context, R.style.TextAppearanceSecondaryItem);
+            mTitle.setText(DataUtils.getFormattedSnippet(data.getSnippet()));
+            if (data.hasAlert()) {
+                mAlert.setImageResource(R.drawable.clock); // 设置时钟图标
+                mAlert.setVisibility(View.VISIBLE);
+            } else {
+                mAlert.setVisibility(View.GONE); // 隐藏警告图标
+            }
+        } else {
+            mCallName.setVisibility(View.GONE); // 隐藏通话名称
+            mTitle.setTextAppearance(context, R.style.TextAppearancePrimaryItem);
+
+            if (data.getType() == Notes.TYPE_FOLDER) {
+                mTitle.setText(data.getSnippet()
+                        + context.getString(R.string.format_folder_files_count,
+                                data.getNotesCount())); // 设置文件夹标题
+                mAlert.setVisibility(View.GONE); // 隐藏警告图标
+            } else {
+                mTitle.setText(DataUtils.getFormattedSnippet(data.getSnippet()));
+                if (data.hasAlert()) {
+                    mAlert.setImageResource(R.drawable.clock); // 设置时钟图标
+                    mAlert.setVisibility(View.VISIBLE);
+                } else {
+                    mAlert.setVisibility(View.GONE); // 隐藏警告图标
+                }
+            }
+        }
+        mTime.setText(DateUtils.getRelativeTimeSpanString(data.getModifiedDate())); // 设置修改时间
+
+        setBackground(data); // 设置背景
+    }
+
+    private void setBackground(NoteItemData data) {
+        int id = data.getBgColorId(); // 获取背景颜色ID
+        if (data.getType() == Notes.TYPE_NOTE) {
+            if (data.isSingle() || data.isOneFollowingFolder()) {
+                setBackgroundResource(NoteItemBgResources.getNoteBgSingleRes(id)); // 设置单个笔记背景
+            } else if (data.isLast()) {
+                setBackgroundResource(NoteItemBgResources.getNoteBgLastRes(id)); // 设置最后一个笔记背景
+            } else if (data.isFirst() || data.isMultiFollowingFolder()) {
+                setBackgroundResource(NoteItemBgResources.getNoteBgFirstRes(id)); // 设置第一个笔记背景
+            } else {
+                setBackgroundResource(NoteItemBgResources.getNoteBgNormalRes(id)); // 设置普通笔记背景
+            }
+        } else {
+            setBackgroundResource(NoteItemBgResources.getFolderBgRes()); // 设置文件夹背景
+        }
+    }
+
+    public NoteItemData getItemData() {
+        return mItemData; // 获取笔记项数据
+    }
+}

src/ui/NotesPreferenceActivity注释.txt

@@ -0,0 +1,358 @@
+package net.micode.notes.ui;
+
+import android.accounts.Account;
+import android.accounts.AccountManager;
+import android.app.ActionBar;
+import android.app.AlertDialog;
+import android.content.BroadcastReceiver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.Preference.OnPreferenceClickListener;
+import android.preference.PreferenceActivity;
+import android.preference.PreferenceCategory;
+import android.text.TextUtils;
+import android.text.format.DateFormat;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.remote.GTaskSyncService;
+
+public class NotesPreferenceActivity extends PreferenceActivity {
+    public static final String PREFERENCE_NAME = "notes_preferences";
+    public static final String PREFERENCE_SYNC_ACCOUNT_NAME = "pref_key_account_name";
+    public static final String PREFERENCE_LAST_SYNC_TIME = "pref_last_sync_time";
+    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";
+    private static final String AUTHORITIES_FILTER_KEY = "authorities";
+
+    private PreferenceCategory mAccountCategory; // 账户类别
+    private GTaskReceiver mReceiver; // 广播接收器
+    private Account[] mOriAccounts; // 原始账户
+    private boolean mHasAddedAccount; // 是否添加了账户
+
+    @Override
+    protected void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+        getActionBar().setDisplayHomeAsUpEnabled(true); // 使用应用图标进行导航
+
+        addPreferencesFromResource(R.xml.preferences); // 加载偏好设置
+        mAccountCategory = (PreferenceCategory) findPreference(PREFERENCE_SYNC_ACCOUNT_KEY);
+        mReceiver = new GTaskReceiver(); // 初始化广播接收器
+        IntentFilter filter = new IntentFilter();
+        filter.addAction(GTaskSyncService.GTASK_SERVICE_BROADCAST_NAME);
+        registerReceiver(mReceiver, filter); // 注册广播接收器
+
+        mOriAccounts = null;
+        View header = LayoutInflater.from(this).inflate(R.layout.settings_header, null);
+        getListView().addHeaderView(header, null, true); // 添加头部视图
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+
+        // 如果用户添加了新账户，则需要自动设置同步账户
+        if (mHasAddedAccount) {
+            Account[] accounts = getGoogleAccounts();
+            if (mOriAccounts != null && accounts.length > mOriAccounts.length) {
+                for (Account accountNew : accounts) {
+                    boolean found = false;
+                    for (Account accountOld : mOriAccounts) {
+                        if (TextUtils.equals(accountOld.name, accountNew.name)) {
+                            found = true;
+                            break;
+                        }
+                    }
+                    if (!found) {
+                        setSyncAccount(accountNew.name); // 设置同步账户
+                        break;
+                    }
+                }
+            }
+        }
+
+        refreshUI(); // 刷新UI
+    }
+
+    @Override
+    protected void onDestroy() {
+        if (mReceiver != null) {
+            unregisterReceiver(mReceiver); // 注销广播接收器
+        }
+        super.onDestroy();
+    }
+
+    private void loadAccountPreference() {
+        mAccountCategory.removeAll(); // 清空账户类别
+
+        Preference accountPref = new Preference(this);
+        final String defaultAccount = getSyncAccountName(this);
+        accountPref.setTitle(getString(R.string.preferences_account_title));
+        accountPref.setSummary(getString(R.string.preferences_account_summary));
+        accountPref.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            public boolean onPreferenceClick(Preference preference) {
+                if (!GTaskSyncService.isSyncing()) {
+                    if (TextUtils.isEmpty(defaultAccount)) {
+                        // 第一次设置账户
+                        showSelectAccountAlertDialog();
+                    } else {
+                        // 如果账户已经设置，需要提示用户风险
+                        showChangeAccountConfirmAlertDialog();
+                    }
+                } else {
+                    Toast.makeText(NotesPreferenceActivity.this,
+                            R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT)
+                            .show();
+                }
+                return true;
+            }
+        });
+
+        mAccountCategory.addPreference(accountPref); // 添加账户偏好设置
+    }
+
+    private void loadSyncButton() {
+        Button syncButton = (Button) findViewById(R.id.preference_sync_button);
+        TextView lastSyncTimeView = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
+
+        // 设置按钮状态
+        if (GTaskSyncService.isSyncing()) {
+            syncButton.setText(getString(R.string.preferences_button_sync_cancel));
+            syncButton.setOnClickListener(new View.OnClickListener() {
+                public void onClick(View v) {
+                    GTaskSyncService.cancelSync(NotesPreferenceActivity.this); // 取消同步
+                }
+            });
+        } else {
+            syncButton.setText(getString(R.string.preferences_button_sync_immediately));
+            syncButton.setOnClickListener(new View.OnClickListener() {
+                public void onClick(View v) {
+                    GTaskSyncService.startSync(NotesPreferenceActivity.this); // 立即同步
+                }
+            });
+        }
+        syncButton.setEnabled(!TextUtils.isEmpty(getSyncAccountName(this))); // 根据账户状态启用按钮
+
+        // 设置最后同步时间
+        if (GTaskSyncService.isSyncing()) {
+            lastSyncTimeView.setText(GTaskSyncService.getProgressString());
+            lastSyncTimeView.setVisibility(View.VISIBLE);
+        } else {
+            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);
+            } else {
+                lastSyncTimeView.setVisibility(View.GONE);
+            }
+        }
+    }
+
+    private void refreshUI() {
+        loadAccountPreference(); // 加载账户偏好设置
+        loadSyncButton(); // 加载同步按钮
+    }
+
+    private void showSelectAccountAlertDialog() {
+        AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
+
+        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));
+
+        dialogBuilder.setCustomTitle(titleView);
+        dialogBuilder.setPositiveButton(null, null);
+
+        Account[] accounts = getGoogleAccounts();
+        String defAccount = getSyncAccountName(this);
+
+        mOriAccounts = accounts;
+        mHasAddedAccount = false;
+
+        if (accounts.length > 0) {
+            CharSequence[] items = new CharSequence[accounts.length];
+            final CharSequence[] itemMapping = items;
+            int checkedItem = -1;
+            int index = 0;
+            for (Account account : accounts) {
+                if (TextUtils.equals(account.name, defAccount)) {
+                    checkedItem = index; // 记录默认账户
+                }
+                items[index++] = account.name; // 添加账户名称
+            }
+            dialogBuilder.setSingleChoiceItems(items, checkedItem,
+                    new DialogInterface.OnClickListener() {
+                        public void onClick(DialogInterface dialog, int which) {
+                            setSyncAccount(itemMapping[which].toString()); // 设置同步账户
+                            dialog.dismiss();
+                            refreshUI(); // 刷新UI
+                        }
+                    });
+        }
+
+        View addAccountView = LayoutInflater.from(this).inflate(R.layout.add_account_text, null);
+        dialogBuilder.setView(addAccountView);
+
+        final AlertDialog dialog = dialogBuilder.show();
+        addAccountView.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                mHasAddedAccount = true;
+                Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS");
+                intent.putExtra(AUTHORITIES_FILTER_KEY, new String[] {
+                    "gmail-ls"
+                });
+                startActivityForResult(intent, -1); // 启动添加账户设置
+                dialog.dismiss();
+            }
+        });
+    }
+
+    private void showChangeAccountConfirmAlertDialog() {
+        AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
+
+        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));
+        dialogBuilder.setCustomTitle(titleView);
+
+        CharSequence[] menuItemArray = new CharSequence[] {
+                getString(R.string.preferences_menu_change_account),
+                getString(R.string.preferences_menu_remove_account),
+                getString(R.string.preferences_menu_cancel)
+        };
+        dialogBuilder.setItems(menuItemArray, new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int which) {
+                if (which == 0) {
+                    showSelectAccountAlertDialog(); // 显示选择账户对话框
+                } else if (which == 1) {
+                    removeSyncAccount(); // 移除同步账户
+                    refreshUI(); // 刷新UI
+                }
+            }
+        });
+        dialogBuilder.show();
+    }
+
+    private Account[] getGoogleAccounts() {
+        AccountManager accountManager = AccountManager.get(this);
+        return accountManager.getAccountsByType("com.google"); // 获取Google账户
+    }
+
+    private void setSyncAccount(String account) {
+        if (!getSyncAccountName(this).equals(account)) {
+            SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
+            SharedPreferences.Editor editor = settings.edit();
+            if (account != null) {
+                editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, account); // 设置同步账户名称
+            } else {
+                editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
+            }
+            editor.commit();
+
+            // 清除最后同步时间
+            setLastSyncTime(this, 0);
+
+            // 清除本地GTask相关信息
+            new Thread(new Runnable() {
+                public void run() {
+                    ContentValues values = new ContentValues();
+                    values.put(NoteColumns.GTASK_ID, "");
+                    values.put(NoteColumns.SYNC_ID, 0);
+                    getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
+                }
+            }).start();
+
+            Toast.makeText(NotesPreferenceActivity.this,
+                    getString(R.string.preferences_toast_success_set_accout, account),
+                    Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    private void removeSyncAccount() {
+        SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
+        SharedPreferences.Editor editor = settings.edit();
+        if (settings.contains(PREFERENCE_SYNC_ACCOUNT_NAME)) {
+            editor.remove(PREFERENCE_SYNC_ACCOUNT_NAME); // 移除同步账户名称
+        }
+        if (settings.contains(PREFERENCE_LAST_SYNC_TIME)) {
+            editor.remove(PREFERENCE_LAST_SYNC_TIME); // 移除最后同步时间
+        }
+        editor.commit();
+
+        // 清除本地GTask相关信息
+        new Thread(new Runnable() {
+            public void run() {
+                ContentValues values = new ContentValues();
+                values.put(NoteColumns.GTASK_ID, "");
+                values.put(NoteColumns.SYNC_ID, 0);
+                getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
+            }
+        }).start();
+    }
+
+    public static String getSyncAccountName(Context context) {
+        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
+                Context.MODE_PRIVATE);
+        return settings.getString(PREFERENCE_SYNC_ACCOUNT_NAME, ""); // 获取同步账户名称
+    }
+
+    public static void setLastSyncTime(Context context, long time) {
+        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
+                Context.MODE_PRIVATE);
+        SharedPreferences.Editor editor = settings.edit();
+        editor.putLong(PREFERENCE_LAST_SYNC_TIME, time); // 设置最后同步时间
+        editor.commit();
+    }
+
+    public static long getLastSyncTime(Context context) {
+        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
+                Context.MODE_PRIVATE);
+        return settings.getLong(PREFERENCE_LAST_SYNC_TIME, 0); // 获取最后同步时间
+    }
+
+    private class GTaskReceiver extends BroadcastReceiver {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            refreshUI(); // 刷新UI
+            if (intent.getBooleanExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_IS_SYNCING, false)) {
+                TextView syncStatus = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
+                syncStatus.setText(intent
+                        .getStringExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_PROGRESS_MSG)); // 更新同步状态
+            }
+        }
+    }
+
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                Intent intent = new Intent(this, NotesListActivity.class);
+                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+                startActivity(intent); // 返回到笔记列表活动
+                return true;
+            default:
+                return false;
+        }
+    }
+}