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4 Commits

Author SHA1 Message Date
pxrnavcm8 25175170d8 Merge pull request 'codeMark' (#1) from Luchun_Su into main
7 months ago
苏鹿瑃 1db36409fc codeMark
7 months ago
苏鹿瑃 fb13611327 222.txt
8 months ago
舒振峰 6b2cf14310 verify one more
8 months ago

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//该类是广播接收器,用于在应用启动时初始化提醒设置。
//当系统启动时,它会检查数据库中所有设置了提醒的笔记,并为每个笔记设置相应的提醒。
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.Cursor;
import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.NoteColumns;
public class AlarmInitReceiver extends BroadcastReceiver {
// 查询笔记时需要的列
private static final String[] PROJECTION = new String[]{
NoteColumns.ID,
NoteColumns.ALERTED_DATE
};
//对数据库的操作调用标签ID和闹钟时间
// 列的索引
private static final int COLUMN_ID = 0;
private static final int COLUMN_ALERTED_DATE = 1;
/**
* 广
*
* @param context 访
* @param intent 广
*/
@Override
public void onReceive(Context context, Intent intent) {
// 获取当前日期和时间
long currentDate = System.currentTimeMillis();
//System.currentTimeMillis()产生一个当前的毫秒
// 查询数据库中所有需要提醒的笔记
Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
PROJECTION,
NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,
new String[]{String.valueOf(currentDate)},
//将long变量currentDate转化为字符串
null);
////Cursor通过查找数据库中的标签内容找到和当前系统时间相等的标签
if (c != null) {
// 遍历查询结果,为每个需要提醒的笔记设置提醒
if (c.moveToFirst()) {
do {
// 获取提醒日期
long alertDate = c.getLong(COLUMN_ALERTED_DATE);
// 创建Intent用于在提醒时间触发AlarmReceiver
Intent sender = new Intent(context, AlarmReceiver.class);
sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID)));
// 创建PendingIntent它是一个延迟的意图可以在特定时间由系统触发
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0);
// 获取AlarmManager服务用于设置提醒
AlarmManager alermManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
// 设置提醒
alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent);
} while (c.moveToNext());
}
// 关闭Cursor释放资源
c.close();
}
//根据数据库里的闹钟时间创建一个闹钟机制
}
}

@ -0,0 +1,81 @@
/**
*
*
* 使
*
* 便
* 便
*/
package net.micode.notes.data;
import android.content.Context;
import android.database.Cursor;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.provider.ContactsContract.Data;
import android.telephony.PhoneNumberUtils;
import android.util.Log;
import java.util.HashMap;
public class Contact {
// 缓存已查询过的电话号码和对应的联系人名称,以减少数据库查询次数。
private static HashMap<String, String> sContactCache;
private static final String TAG = "Contact";
// 用于查询具有完整国际号码格式的电话号码的selection字符串。
private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
+ ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
+ " AND " + Data.RAW_CONTACT_ID + " IN "
+ "(SELECT raw_contact_id "
+ " FROM phone_lookup"
+ " WHERE min_match = '+')";
public static String getContact(Context context, String phoneNumber) {
//这段代码是一个联系人管理类,用于获取手机联系人的信息。它通过提供一个静态方法 getContact 来获取指定手机号码对应的联系人姓名
// 初始化或获取联系人缓存
if (sContactCache == null) {
sContactCache = new HashMap<String, String>();
}
// 从缓存中直接获取联系人名称,如果存在。
if (sContactCache.containsKey(phoneNumber)) {
return sContactCache.get(phoneNumber);
}
// 使用PhoneNumberUtils将电话号码格式化为适合查询的形式
String selection = CALLER_ID_SELECTION.replace("+",//构造一个需要查询的联系人名
PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
// 执行查询以获取与电话号码相关联的联系人名称
Cursor cursor = context.getContentResolver().query(
Data.CONTENT_URI,
new String[]{Phone.DISPLAY_NAME},
selection,
new String[]{phoneNumber},
null);
if (cursor != null && cursor.moveToFirst()) {
//查询成功且有结果,就从 Cursor 中获取联系人姓名,并将结果存入 sContactCache 中作为缓存
try {
// 从查询结果中获取联系人名称并加入缓存
String name = cursor.getString(0);
sContactCache.put(phoneNumber, name);
return name;
} catch (IndexOutOfBoundsException e) {
// 查询结果异常的情况
Log.e(TAG, " Cursor get string error " + e.toString());
return null;
} finally {
cursor.close();
// 关闭游标
}
} else {
// 如果查询失败或无结果则返回null
Log.d(TAG, "No contact matched with number:" + phoneNumber);
return null;
}
}
}
/* ContactCache
*/

@ -0,0 +1,607 @@
/*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.micode.notes.ui;
import java.text.DateFormatSymbols;
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 {
// 默认启用状态
private static final boolean DEFAULT_ENABLE_STATE = true;
// 半天的小时数
private static final int HOURS_IN_HALF_DAY = 12;
// 一整天的小时数
private static final int HOURS_IN_ALL_DAY = 24;
// 一周的天数
private static final int DAYS_IN_ALL_WEEK = 7;
// 日期选择器的最小值
private static final int DATE_SPINNER_MIN_VAL = 0;
// 日期选择器的最大值
private static final int DATE_SPINNER_MAX_VAL = DAYS_IN_ALL_WEEK - 1;
// 24小时制小时选择器的最小值
private static final int HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW = 0;
// 24小时制小时选择器的最大值
private static final int HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW = 23;
// 12小时制小时选择器的最小值
private static final int HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW = 1;
// 12小时制小时选择器的最大值
private static final int HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW = 12;
// 分钟选择器的最小值
private static final int MINUT_SPINNER_MIN_VAL = 0;
// 分钟选择器的最大值
private static final int MINUT_SPINNER_MAX_VAL = 59;
// 上下午选择器的最小值
private static final int AMPM_SPINNER_MIN_VAL = 0;
// 上下午选择器的最大值
private static final int AMPM_SPINNER_MAX_VAL = 1;
//初始化控件
// 日期选择器
private final NumberPicker mDateSpinner;
// 小时选择器
private final NumberPicker mHourSpinner;
// 分钟选择器
private final NumberPicker mMinuteSpinner;
// 上下午选择器
private final NumberPicker mAmPmSpinner;
// 当前日期
//NumberPicker是数字选择器
//这里定义的四个变量全部是在设置闹钟时需要选择的变量
private Calendar mDate;
//定义了Calendar类型的变量mDate用于操作时间
// 用于显示日期的字符串数组
private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK];
// 当前是否为上午
private boolean mIsAm;
// 当前是否为24小时制视图
private boolean mIs24HourView;
// 控件是否启用
private boolean mIsEnabled = DEFAULT_ENABLE_STATE;
// 是否正在初始化
private boolean mInitialising;
// 日期时间改变监听器
private OnDateTimeChangedListener mOnDateTimeChangedListener;
//OnValueChangeListener是时间改变监听器对日期的监听
//将现在日期的值传递给mDateupdateDateControl是同步操作
// 日期选择器的值改变监听器
private NumberPicker.OnValueChangeListener mOnDateChangedListener = new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
// 根据新旧值的差异更新日期
mDate.add(Calendar.DAY_OF_YEAR, newVal - oldVal);
updateDateControl();
onDateTimeChanged();
}
};
// 小时选择器的值改变监听器
private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
// 根据小时的变化更新日期和上下午状态对小时Hour的监听
boolean isDateChanged = false;
Calendar cal = Calendar.getInstance();
//声明一个Calendar的变量cal便于后续的操作
if (!mIs24HourView) {
if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) {
cal.setTimeInMillis(mDate.getTimeInMillis());
cal.add(Calendar.DAY_OF_YEAR, 1);
isDateChanged = true;
//对于12小时制晚上11点和12点交替时对日期的更改
} else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
cal.setTimeInMillis(mDate.getTimeInMillis());
cal.add(Calendar.DAY_OF_YEAR, -1);
isDateChanged = true;
}
//这对于12小时制凌晨11点和12点交替时对日期的更改
if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY ||
oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
mIsAm = !mIsAm;
updateAmPmControl();
}
//对于12小时制中午11点和12点交替时对AM和PM的更改
} else {
// 处理24小时制下的日期变化
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;
}
}
// 更新小时并触发日期时间改变事件
int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);
//通过数字选择器对newHour的赋值
mDate.set(Calendar.HOUR_OF_DAY, newHour);
//通过set函数将新的Hour值传给mDate
onDateTimeChanged();
// 如果日期有变化,则更新年月日
if (isDateChanged) {
setCurrentYear(cal.get(Calendar.YEAR));
setCurrentMonth(cal.get(Calendar.MONTH));
setCurrentDay(cal.get(Calendar.DAY_OF_MONTH));
}
}
};
//OnValueChangeListener这是时间改变监听器这里主要是对日期的监听
//将现在日期的值传递给mDateupdateDateControl是同步操作
// 分别为分钟和AM/PM选择器监听器设置匿名内部类实现数值变化时的处理逻辑。
private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
// 计算小时的偏移量,当从最大值变为最小值或从最小值变为最大值时调整
int minValue = mMinuteSpinner.getMinValue();
int maxValue = mMinuteSpinner.getMaxValue();
int offset = 0;
//设置offset作为小时改变的一个记录数据
if (oldVal == maxValue && newVal == minValue) {
offset += 1;
} else if (oldVal == minValue && newVal == maxValue) {
offset -= 1;
}
// 根据偏移量更新日期和小时选择器并检查是否需要切换AM/PM
//如果原值为59新值为0则offset加1
//如果原值为0新值为59则offset减1
if (offset != 0) {
mDate.add(Calendar.HOUR_OF_DAY, offset);
mHourSpinner.setValue(getCurrentHour());
updateDateControl();
int newHour = getCurrentHourOfDay();
if (newHour >= HOURS_IN_HALF_DAY) {
mIsAm = false;
updateAmPmControl();
} else {
mIsAm = true;
updateAmPmControl();
}
}
// 更新分钟值并触发日期变化的回调
mDate.set(Calendar.MINUTE, newVal);
onDateTimeChanged();
}
};
private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {
//对AM和PM的监听
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
// 切换AM/PM状态并更新日期和AM/PM选择器
mIsAm = !mIsAm;
if (mIsAm) {
mDate.add(Calendar.HOUR_OF_DAY, -HOURS_IN_HALF_DAY);
} else {
mDate.add(Calendar.HOUR_OF_DAY, HOURS_IN_HALF_DAY);
}
updateAmPmControl();
onDateTimeChanged();
}
};
// 定义日期时间变化的回调接口
public interface OnDateTimeChangedListener {
void onDateTimeChanged(DateTimePicker view, int year, int month,
int dayOfMonth, int hourOfDay, int minute);
}
// 构造函数:初始化日期时间选择器
public DateTimePicker(Context context) {
this(context, System.currentTimeMillis());
}
//通过对数据库的访问,获取当前的系统时间
// 构造函数:指定初始日期时间
public DateTimePicker(Context context, long date) {
this(context, date, DateFormat.is24HourFormat(context));
}
// 构造函数指定是否使用24小时制视图
public DateTimePicker(Context context, long date, boolean is24HourView) {
super(context);
//获取系统时间
mDate = Calendar.getInstance();
mInitialising = true;
mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY;
inflate(context, R.layout.datetime_picker, this);
// 初始化日期、小时、分钟和AM/PM选择器并设置相应的监听器
mDateSpinner = (NumberPicker) findViewById(R.id.date);
mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);
mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);
mDateSpinner.setOnValueChangedListener(mOnDateChangedListener);
mHourSpinner = (NumberPicker) findViewById(R.id.hour);
mHourSpinner.setOnValueChangedListener(mOnHourChangedListener);
mMinuteSpinner = (NumberPicker) findViewById(R.id.minute);
mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL);
mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL);
mMinuteSpinner.setOnLongPressUpdateInterval(100);
mMinuteSpinner.setOnValueChangedListener(mOnMinuteChangedListener);
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);
// 更新控件至初始状态
updateDateControl();
updateHourControl();
updateAmPmControl();
set24HourView(is24HourView);
// 设置为当前时间
setCurrentDate(date);
setEnabled(isEnabled());
// 设置内容描述
mInitialising = false;
}
/**
*
*
*
*
* @param enabled
*/
@Override
public void setEnabled(boolean enabled) {
if (mIsEnabled == enabled) {
return;
}
super.setEnabled(enabled);
// 同时启用或禁用日期和时间选择器
mDateSpinner.setEnabled(enabled);
mMinuteSpinner.setEnabled(enabled);
mHourSpinner.setEnabled(enabled);
mAmPmSpinner.setEnabled(enabled);
mIsEnabled = enabled;
}
//存在疑问setEnabled的作用
//下面的代码通过原程序的注释已经比较清晰,另外可以通过函数名来判断
//下面的各函数主要是对上面代码引用到的各函数功能的实现
/**
*
*
* @return
*/
@Override
public boolean isEnabled() {
return mIsEnabled;
}
/**
*
*
* @return
*/
public long getCurrentDateInTimeMillis() {
return mDate.getTimeInMillis();
}
//实现函数得到当前的秒数
/**
*
*
*
* @param date The current date in millis
*/
public void setCurrentDate(long date) {
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(date);
// 通过日历实例的详细字段设置当前日期和时间
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));
}
//实现函数功能设置当前的时间参数是date
/**
*
*
*
* @param year
* @param month
* @param dayOfMonth
* @param hourOfDay
* @param minute
*/
public void setCurrentDate(int year, int month,
int dayOfMonth, int hourOfDay, int minute) {
// 分别设置年、月、日、时和分
setCurrentYear(year);
setCurrentMonth(month);
setCurrentDay(dayOfMonth);
setCurrentHour(hourOfDay);
setCurrentMinute(minute);
}
//实现函数功能,设置当前的时间,参数是各详细的变量
/**
*
*
* @return
*/
public int getCurrentYear() {
return mDate.get(Calendar.YEAR);
}
//得到year、month、day等值
/**
*
*
* @param year
*/
public void setCurrentYear(int year) {
// 如果不是初始化状态并且设置的年份与当前年份相同,则直接返回
if (!mInitialising && year == getCurrentYear()) {
return;
}
mDate.set(Calendar.YEAR, year);
updateDateControl(); // 更新日期控件
onDateTimeChanged(); // 触发日期时间改变事件
}
/**
*
*
* @return 0
*/
public int getCurrentMonth() {
return mDate.get(Calendar.MONTH);
}
/**
*
*
* @param month 0
*/
public void setCurrentMonth(int month) {
// 如果不是初始化状态并且设置的月份与当前月份相同,则直接返回
if (!mInitialising && month == getCurrentMonth()) {
return;
}
mDate.set(Calendar.MONTH, month);
updateDateControl(); // 更新日期控件
onDateTimeChanged(); // 触发日期时间改变事件
}
/**
*
*
* @return
*/
public int getCurrentDay() {
return mDate.get(Calendar.DAY_OF_MONTH);
}
/**
*
*
* @param dayOfMonth
*/
public void setCurrentDay(int dayOfMonth) {
// 如果不是初始化状态并且设置的日期与当前日期相同,则直接返回
if (!mInitialising && dayOfMonth == getCurrentDay()) {
return;
}
mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
updateDateControl(); // 更新日期控件
onDateTimeChanged(); // 触发日期时间改变事件
}
/**
* 24(0~23)
*
* @return 24
*/
public int getCurrentHourOfDay() {
return mDate.get(Calendar.HOUR_OF_DAY);
}
/**
* 24
* 24{@link #getCurrentHourOfDay()}
* 12/
*
* @return 12
*/
private int getCurrentHour() {
if (mIs24HourView) {
return getCurrentHourOfDay();
} else {
int hour = getCurrentHourOfDay();
// 转换为12小时制
if (hour > HOURS_IN_HALF_DAY) {
return hour - HOURS_IN_HALF_DAY;
} else {
return hour == 0 ? HOURS_IN_HALF_DAY : hour;
}
}
}
/**
* 24(0~23)
*
* @param hourOfDay
*/
public void setCurrentHour(int hourOfDay) {
// 如果在初始化中或者小时未改变,则直接返回
if (!mInitialising && hourOfDay == getCurrentHourOfDay()) {
return;
}
mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
// 如果不是24小时视图则调整小时数并更新AM/PM控制
if (!mIs24HourView) {
if (hourOfDay >= HOURS_IN_HALF_DAY) {
mIsAm = false;
if (hourOfDay > HOURS_IN_HALF_DAY) {
hourOfDay -= HOURS_IN_HALF_DAY;
}
} else {
mIsAm = true;
if (hourOfDay == 0) {
hourOfDay = HOURS_IN_HALF_DAY;
}
}
updateAmPmControl();
}
mHourSpinner.setValue(hourOfDay);
onDateTimeChanged();
}
/**
*
*
* @return
*/
public int getCurrentMinute() {
return mDate.get(Calendar.MINUTE);
}
/**
*
*
* @param minute
*/
public void setCurrentMinute(int minute) {
// 如果在初始化中或者分钟数未改变,则直接返回
if (!mInitialising && minute == getCurrentMinute()) {
return;
}
mMinuteSpinner.setValue(minute);
mDate.set(Calendar.MINUTE, minute);
onDateTimeChanged();
}
/**
* 24
*
* @return 24truefalse
*/
public boolean is24HourView() {
return mIs24HourView;
}
/**
* 24AM/PM
*
* @param is24HourView true24falseAM/PM
*/
public void set24HourView(boolean is24HourView) {
// 如果视图模式未改变,则直接返回
if (mIs24HourView == is24HourView) {
return;
}
mIs24HourView = is24HourView;
mAmPmSpinner.setVisibility(is24HourView ? View.GONE : View.VISIBLE);
int hour = getCurrentHourOfDay();
updateHourControl();
setCurrentHour(hour);
updateAmPmControl();
}
/**
*
*/
private void updateDateControl() {
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(mDate.getTimeInMillis());
cal.add(Calendar.DAY_OF_YEAR, -DAYS_IN_ALL_WEEK / 2 - 1);
mDateSpinner.setDisplayedValues(null);
// 循环设置一周内每一天的显示文本
for (int i = 0; i < DAYS_IN_ALL_WEEK; ++i) {
cal.add(Calendar.DAY_OF_YEAR, 1);
mDateDisplayValues[i] = (String) DateFormat.format("MM.dd EEEE", cal);
}
mDateSpinner.setDisplayedValues(mDateDisplayValues);
mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);
mDateSpinner.invalidate();
}
// 对于星期几的算法
/**
* 24AM/PM
*/
private void updateAmPmControl() {
if (mIs24HourView) {
mAmPmSpinner.setVisibility(View.GONE);
} else {
int index = mIsAm ? Calendar.AM : Calendar.PM;
mAmPmSpinner.setValue(index);
mAmPmSpinner.setVisibility(View.VISIBLE);
}
}
// 对于上下午操作的算法
/**
* 24
*/
private void updateHourControl() {
if (mIs24HourView) {
mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW);
mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW);
} else {
mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW);
mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW);
}
}
// 对与小时的算法
/**
*
*
* @param callback null
*/
public void setOnDateTimeChangedListener(OnDateTimeChangedListener callback) {
mOnDateTimeChangedListener = callback;
}
/**
*
*/
private void onDateTimeChanged() {
if (mOnDateTimeChangedListener != null) {
mOnDateTimeChangedListener.onDateTimeChanged(this, getCurrentYear(),
getCurrentMonth(), getCurrentDay(), getCurrentHourOfDay(), getCurrentMinute());
}
}
}

@ -0,0 +1,361 @@
/**
* - ContentResolver便
* -
*/
package net.micode.notes.data;
import android.app.SearchManager;
import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Intent;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.text.TextUtils;
import android.util.Log;
import net.micode.notes.R;
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.data.NotesDatabaseHelper.TABLE;
//这段代码用于管理笔记的数据,提供了对笔记的查询、插入、更新和删除等操作
public class NotesProvider extends ContentProvider {
//这段代码实现了一个ContentProvider其中包含了对数据的查询、插入、删除和更新操作
private static final UriMatcher mMatcher;
private NotesDatabaseHelper mHelper;
private static final String TAG = "NotesProvider";
private static final int URI_NOTE = 1;
private static final int URI_NOTE_ITEM = 2;
private static final int URI_DATA = 3;
private static final int URI_DATA_ITEM = 4;
private static final int URI_SEARCH = 5;
private static final int URI_SEARCH_SUGGEST = 6;
// 初始化UriMatcher用于匹配不同的URI请求
static {
mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM);
mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA);
mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM);
mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH);
mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST);
mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST);
}
private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + ","
+ NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
+ "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + ","
+ "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
+ R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
+ "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
+ "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
// 用于搜索查询的SQL语句
private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
+ " FROM " + TABLE.NOTE
+ " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
+ " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
+ " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
/**
* ContentProvider
*
* @return true
*/
@Override
public boolean onCreate() {
mHelper = NotesDatabaseHelper.getInstance(getContext());
//代码通过调用 getContext() 方法获取当前上下文,并使用
//获取一个数据库帮助类的实例将得到的数据库帮助类实例赋值给成员变量mHelper
return true;
}
/**
* URI
*
* @param uri URI
* @param projection
* @param selection
* @param selectionArgs
* @param sortOrder
* @return Cursor
*/
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) {
//用于查询数据。接收一个Uri参数这个Uri参数用于指定要查询的数据。
// 通过查询数据库并返回一个Cursor对象可以获取到相应的数据
Cursor c = null;
SQLiteDatabase db = mHelper.getReadableDatabase();
String id = null;
// 根据URI匹配查询类型
switch (mMatcher.match(uri)) {
case URI_NOTE:
c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
sortOrder);
break;
case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1);
c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs, null, null, sortOrder);
break;
case URI_DATA:
c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
sortOrder);
break;
case URI_DATA_ITEM:
id = uri.getPathSegments().get(1);
c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs, null, null, sortOrder);
break;
case URI_SEARCH:
case URI_SEARCH_SUGGEST:
// 处理搜索建议的特殊逻辑
if (sortOrder != null || projection != null) {
throw new IllegalArgumentException(
"do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
}
String searchString = null;
if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
if (uri.getPathSegments().size() > 1) {
searchString = uri.getPathSegments().get(1);
}
} else {
searchString = uri.getQueryParameter("pattern");
}
if (TextUtils.isEmpty(searchString)) {
return null;
}
try {
searchString = String.format("%%%s%%", searchString);
c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
new String[]{searchString});
} catch (IllegalStateException ex) {
Log.e(TAG, "got exception: " + ex.toString());
}
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
// 设置通知URI以便数据改变时可以通知
if (c != null) {
c.setNotificationUri(getContext().getContentResolver(), uri);
}
return c;
}
//查询根据不同的URI进行查询包括查询全部笔记、单个笔记、全部数据和单个数据
@Override
public Uri insert(Uri uri, ContentValues values) {
//用于插入数据。接收一个Uri参数和一个ContentValues参数用于指定要插入的数据。
//通过将数据插入到数据库中并返回新插入数据的Uri可以实现数据的插入操作
SQLiteDatabase db = mHelper.getWritableDatabase();
long dataId = 0, noteId = 0, insertedId = 0;
switch (mMatcher.match(uri)) {
case URI_NOTE:
insertedId = noteId = db.insert(TABLE.NOTE, null, values);
break;
case URI_DATA:
if (values.containsKey(DataColumns.NOTE_ID)) {
noteId = values.getAsLong(DataColumns.NOTE_ID);
} else {
Log.d(TAG, "Wrong data format without note id:" + values.toString());
}
insertedId = dataId = db.insert(TABLE.DATA, null, values);
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
// 通知URI改变
if (noteId > 0) {
getContext().getContentResolver().notifyChange(
ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
}
if (dataId > 0) {
getContext().getContentResolver().notifyChange(
ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
}
return ContentUris.withAppendedId(uri, insertedId);
}//插入插入新的笔记或数据到数据库中并返回插入数据的URI。
/**
* URI
*
* @param uri URI
* @param selection
* @param selectionArgs
* @return
*/
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
//用于删除数据。它接收一个Uri参数和一个可选的Selection和SelectionArgs参数用于指定要删除的数据。
//通过在数据库中执行删除操作,并返回受影响的行数,可以实现数据的删除操作。
int count = 0;
String id = null;
SQLiteDatabase db = mHelper.getWritableDatabase();
boolean deleteData = false;
switch (mMatcher.match(uri)) {
case URI_NOTE:
selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
count = db.delete(TABLE.NOTE, selection, selectionArgs);
break;
case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1);
/**
* ID0
*/
long noteId = Long.valueOf(id);
if (noteId <= 0) {
break;
}
count = db.delete(TABLE.NOTE,
NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
break;
case URI_DATA:
count = db.delete(TABLE.DATA, selection, selectionArgs);
deleteData = true;
break;
case URI_DATA_ITEM:
id = uri.getPathSegments().get(1);
count = db.delete(TABLE.DATA,
DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
deleteData = true;
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
// 通知URI改变
if (count > 0) {
if (deleteData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
}
getContext().getContentResolver().notifyChange(uri, null);
}
return count;
}
//删除:删除符合条件的笔记或数据,并返回被删除的行数。
/**
*
*
* @param uri URI
* @param values
* @param selection
* @param selectionArgs
* @return
*/
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
//用于更新数据。接收一个Uri参数、一个ContentValues参数和一个可选的Selection和SelectionArgs参数用于指定要更新的数据和更新条件。
//通过在数据库中执行更新操作,并返回受影响的行数,可以实现数据的更新操作
int count = 0;
String id = null;
SQLiteDatabase db = mHelper.getWritableDatabase();
boolean updateData = false;
switch (mMatcher.match(uri)) {
case URI_NOTE:
increaseNoteVersion(-1, selection, selectionArgs);
count = db.update(TABLE.NOTE, values, selection, selectionArgs);
break;
case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1);
increaseNoteVersion(Long.valueOf(id), selection, selectionArgs);
count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs);
break;
case URI_DATA:
count = db.update(TABLE.DATA, values, selection, selectionArgs);
updateData = true;
break;
case URI_DATA_ITEM:
id = uri.getPathSegments().get(1);
count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs);
updateData = true;
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
//更新:更新符合条件的笔记或数据,并返回被更新的行数。更新笔记时会增加笔记的版本号。
// 通知URI改变
if (count > 0) {
if (updateData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
}
getContext().getContentResolver().notifyChange(uri, null);
}
return count;
}
/**
* " AND (" ')'
*
* @param selection
* @return
*/
private String parseSelection(String selection) {
return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
}
/**
*
*
* @param id IDID0selection
* @param selection
* @param selectionArgs selection使selection"?"
*/
private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
StringBuilder sql = new StringBuilder(120);
sql.append("UPDATE ");
sql.append(TABLE.NOTE);
sql.append(" SET ");
sql.append(NoteColumns.VERSION);
sql.append("=" + NoteColumns.VERSION + "+1 ");
// 根据ID或选择条件构建SQL的WHERE子句
if (id > 0 || !TextUtils.isEmpty(selection)) {
sql.append(" WHERE ");
}
if (id > 0) {
sql.append(NoteColumns.ID + "=" + String.valueOf(id));
}
if (!TextUtils.isEmpty(selection)) {
String selectString = id > 0 ? parseSelection(selection) : selection;
// 替换selection中的"?"为selectionArgs中的对应参数
for (String args : selectionArgs) {
selectString = selectString.replaceFirst("\\?", args);
}
sql.append(selectString);
}
mHelper.getWritableDatabase().execSQL(sql.toString());
}
/**
* URIMIME
* null
*
* @param uri URI
* @return null
*/
@Override
public String getType(Uri uri) {
//用于获取数据的类型。
// TODO Auto-generated method stub
return null;
}
}

@ -1,3 +1,5 @@
.LOG .LOG
this is a file for test. this is a file for test.
this is a line of input. this is a line of input.
19:31 2024-03-23
test for verify use
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