Rexsee API引见：Android定时任务Alarm，附基本的闹钟功能示例

?

利用Rexsee扩展的Alarm可以快速实现关于任务定时的相关功能，基本的闹钟事件如下

?

【函数】 void set(String argu)

【说明】 设置闹钟。

【返回】 无

【参数】 ?argu：型如“key1=value1;key2=value2;......”的参数表。首先，该参数表支持rexseeNotification.show()函数的所有参数，用于显示通知（调用rexseeNotification.show()），请参见rexseeNotification。另外，该参数表增加了以下参数：

?

• forcerepeat：true或false。当该闹钟是由推送信息而非页面设定时，如果id和之前的推送信息的id重复，由该参数决定是否强制重新执行，默认为false，即不会重复执行任何id重复的推送信息。
• command：闹钟响时要执行的命令，目前支持的命令包括：
  • notification：发送通知，默认值。
  • startApplication：启动程序。
  • cleanApplicationData：清除本程序的业务数据（私有内存中的所有数据）。
• notificationimmediately：true或false，无论命令是否notification，该参数都允许系统在设置闹钟的第一时间先发送一个通知，然后在指定的时间延迟后再执行命令，默认为false。
• notificationafterexec：true或false，无论命令是否notification，该参数都允许系统在执行完命令后发送一个通知，默认为false。
• alermname：闹钟的名称，默认为"defaultAlerm"。
• alermfirsttime：时间戳，第一次闹钟响（即执行命令）的时间，如果设为0或其他小于当前时间的时间戳，命令将立即执行，默认为立即执行。
• alermrepeatinterval：毫秒数，第一次闹钟响之后，间隔该时间后重复执行命令，如果小于零，将不会重复执行。
• startApplicationUrl：如果命令为startApplication，程序启动后访问的URL地址。

【示例】

?

?

【函数】 JsonObjectArray get()

【说明】 读取所有的闹钟信息。

【返回】 JSON对象数组，使用eval('('+json+')')转换为JavaScript对象数组。

【参数】 无

【示例】

?

?

【函数】 void cancel(String name)

【说明】 取消闹钟。

【返回】 无

【参数】 name：闹钟名称。

【示例】

?

?

rexseeAlarm.java源码如下：

?

/* * Copyright (C) 2011 The Rexsee Open Source Project * * Licensed under the Rexsee License, Version 1.0 (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.rexsee.com/CN/legal/license.html * * 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 rexsee.core.alarm;   import rexsee.core.browser.JavascriptInterface;  import rexsee.core.browser.RexseeBrowser;  import rexsee.core.device.NotificationArgumentsSheet;  import rexsee.core.device.RexseeNotification;  import rexsee.core.receiver._Receiver;  import android.app.AlarmManager;  import android.app.PendingIntent;  import android.content.Context;  import android.content.Intent;  import android.database.Cursor;  import android.database.sqlite.SQLiteDatabase;   public class RexseeAlarm implements JavascriptInterface {          private static final String INTERFACE_NAME = "Alarm";         @Override         public String getInterfaceName() {                 return mBrowser.application.resources.prefix + INTERFACE_NAME;         }         @Override         public JavascriptInterface getInheritInterface(RexseeBrowser childBrowser) {                 return this;         }         @Override         public JavascriptInterface getNewInterface(RexseeBrowser childBrowser) {                 return new RexseeAlarm(childBrowser);         }          public static final String ALARM_ACTION = "action.alarm.id_";         public static final String ALARM_EXTRA_ARGU = "argu";          public static final String DATABASE_ALARM = "alarm.db";         public static final String TABLE_ALARM = "alarm";          private final Context mContext;         private final RexseeBrowser mBrowser;          public RexseeAlarm(RexseeBrowser browser) {                 mBrowser = browser;                 mContext = browser.getContext();         }         public RexseeAlarm(Context context) {                 mBrowser = null;                 mContext = context;         }          private static void _setAlarm(Context context, AlarmManager mgr, String body, boolean save) {                 NotificationArgumentsSheet argu = (new NotificationArgumentsSheet()).parseArguments(body);                 if (argu.notificationimmediately) {                         (new RexseeNotification(context)).show(argu);                 }                 if (argu.getAlermFirstTime() > System.currentTimeMillis()) {                         Intent intent = new Intent(context, _Receiver.class);                         intent.setAction(ALARM_ACTION + argu.alermname);                         intent.putExtra(ALARM_EXTRA_ARGU, body);                         PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);                         mgr.cancel(pendingIntent);                         long interval = argu.getAlermRepeatInterval();                         if (interval > 0) {                                 mgr.setRepeating(AlarmManager.RTC_WAKEUP, argu.getAlermFirstTime(), interval, pendingIntent);                         } else {                                 mgr.set(AlarmManager.RTC_WAKEUP, argu.getAlermFirstTime(), pendingIntent);                         }                         if (save) {                                 SQLiteDatabase db = context.openOrCreateDatabase(DATABASE_ALARM, Context.MODE_PRIVATE, null);                                 try {                                         db.execSQL("CREATE TABLE if not exists " + TABLE_ALARM + " (name TEXT, argu TEXT, Primary key(name));");                                         db.execSQL("DELETE FROM " + TABLE_ALARM + " WHERE name='" + argu.alermname + "';");                                         db.execSQL("INSERT INTO " + TABLE_ALARM + " VALUES ('" + argu.alermname + "', '" + body + "');");                                 } catch (Exception e) {                                 }                                 db.close();                         }                 } else {                         exec(context, body);                 }         }         private static void _deleteAlarm(Context context, String name) {                 SQLiteDatabase db = context.openOrCreateDatabase(DATABASE_ALARM, Context.MODE_PRIVATE, null);                 try {                         db.execSQL("DELETE FROM " + TABLE_ALARM + " WHERE name='" + name + "';");                 } catch (Exception e) {                 }                 db.close();         }          public static void exec(Context context, String body) {                 NotificationArgumentsSheet argu = (new NotificationArgumentsSheet()).parseArguments(body);                 if (argu.getAlermRepeatInterval() <= 0) {                         _deleteAlarm(context, argu.alermname);                 }                 (new RexseeRemoteCommand(context, body)).exec();         }         public static void updateAlarm(Context context) {                 SQLiteDatabase db = context.openOrCreateDatabase(DATABASE_ALARM, Context.MODE_PRIVATE, null);                 AlarmManager mgr = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);                 try {                         db.execSQL("CREATE TABLE if not exists " + TABLE_ALARM + " (name TEXT, argu TEXT, Primary key(name));");                         Cursor cursor = db.rawQuery("SELECT * from " + TABLE_ALARM + ";", null);                         if (cursor != null && cursor.getCount() != 0) {                                 for (int i = 0; i < cursor.getCount(); i++) {                                         cursor.moveToPosition(i);                                         _setAlarm(context, mgr, cursor.getString(1), false);                                 }                         }                         cursor.close();                 } catch (Exception e) {                 }                 db.close();         }          //JavaScript Interface         public void set(String body) {                 _setAlarm(mContext, (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE), body, true);         }         public String get() {                 SQLiteDatabase db = mContext.openOrCreateDatabase(DATABASE_ALARM, Context.MODE_PRIVATE, null);                 String rtn = "";                 try {                         Cursor cursor = db.rawQuery("SELECT * from " + TABLE_ALARM + ";", null);                         if (cursor != null && cursor.getCount() != 0) {                                 for (int i = 0; i < cursor.getCount(); i++) {                                         cursor.moveToPosition(i);                                         if (i > 0) rtn += ",";                                         rtn += "{";                                         rtn += "\"name\":\"" + cursor.getString(0) + "\"";                                         rtn += ",\"argu\":\"" + cursor.getString(1) + "\"";                                         rtn += "}";                                 }                         }                         cursor.close();                 } catch (Exception e) {                         if (mBrowser != null) mBrowser.exception(getInterfaceName(), e);                 }                 db.close();                 return "[" + rtn + "]";         }         public void cancel(String name) {                 Intent intent = new Intent(mContext, _Receiver.class);                 intent.setAction(ALARM_ACTION + name);                 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);                 AlarmManager mgr = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);                 mgr.cancel(pendingIntent);                 _deleteAlarm(mContext, name);         }          public long getCurrentTime() {                 return System.currentTimeMillis();         }         public long getMillisPerHour() {                 return 3600 * 1000;         }         public long getMillisPerDay() {                 return 3600 * 1000 * 24;         }   }