Android的闹钟

闹钟的使用

第一步:注册闹钟(AlarmManager,PendingIntent,Intent,闹钟的时间)

第二步:注册闹钟广播接受者(BroadcastReceiver)

第三步:处理闹钟的时间(比如:打开一个应用,提示用户时间到了 etc....)

=========AlarmAlert.java==========  private void updateLayout() {

。。。。。。。。。。

。。。。。。。。。。

/*snoozebehavior:popasnoozeconfirmationview,kickalarm

manager.*/

Buttonsnooze=(Button)findViewById(R.id.snooze);

snooze.requestFocus();

snooze.setOnClickListener(newButton.OnClickListener(){

publicvoidonClick(Viewv){

snooze();

}

        });

........

........

}

// Attempt to snooze this alert.

privatevoidsnooze(){

finalStringsnooze=

PreferenceManager.getDefaultSharedPreferences(this)

.getString(SettingsActivity.KEY_ALARM_SNOOZE,DEFAULT_SNOOZE);

        int snoozeMinutes = Integer.parseInt(snooze);

        final long snoozeTime = System.currentTimeMillis()

+(1000*60*snoozeMinutes);//计算睡眠时间

 Alarms.saveSnoozeAlert(AlarmAlert.this, mAlarm.id, snoozeTime);//保存睡眠的时间

        // Get the display time for the snooze and update the notification.

finalCalendarc=Calendar.getInstance();

        c.setTimeInMillis(snoozeTime);

。。。。

。。。。

。。。。

//Notifytheuserthatthealarmhasbeensnoozed.//通知给广播接收者AlarmReceiver.class并处理闹钟时间

IntentcancelSnooze=newIntent(this,AlarmReceiver.class);

cancelSnooze.setAction(Alarms.CANCEL_SNOOZE);

cancelSnooze.putExtra(Alarms.ALARM_ID,mAlarm.id);

PendingIntentbroadcast=

PendingIntent.getBroadcast(this,mAlarm.id,cancelSnooze,0);

        NotificationManager nm = getNotificationManager();

。。。。。

。。。。。。。。。。。。。

stopService(newIntent(Alarms.ALARM_ALERT_ACTION));

finish();

    }

=========Alarm.java==========

staticvoidsaveSnoozeAlert(finalContextcontext,finalintid,

finallongtime){

SharedPreferencesprefs=context.getSharedPreferences(

AlarmClock.PREFERENCES,0);

SharedPreferences.Editored=prefs.edit();

if(id==-1){

clearSnoozePreference(ed);

}else{

ed.putInt(PREF_SNOOZE_ID,id);

ed.putLong(PREF_SNOOZE_TIME,time);//保存提示的时间

ed.commit();

}

//Setthenextalertafterupdatingthesnooze.

setNextAlert(context);

    }

/**

*Ifthereisasnoozeset,enableitinAlarmManager

*@returntrueifsnoozeisset

*/

privatestaticbooleanenableSnoozeAlert(finalContextcontext){

SharedPreferencesprefs=context.getSharedPreferences(

                AlarmClock.PREFERENCES, 0);

        int id = prefs.getInt(PREF_SNOOZE_ID, -1);

if(id==-1){

returnfalse;

}

        long time = prefs.getLong(PREF_SNOOZE_TIME, -1);   //取出设置闹钟的时间

        // Get the alarm from the db.

finalAlarmalarm=getAlarm(context.getContentResolver(),id);

//Thetimeinthedatabaseiseither0(repeating)oraspecifictime

//foranon-repeatingalarm.UpdatethisvaluesotheAlarmReceiver

//hastherighttimetocompare.

        alarm.time = time;   //将时间放入数据库中

        enableAlert(context, alarm, time);

returntrue;

    }

/**

*SetsalertinAlarmMangerandStatusBar.Thisiswhatwill

*actuallylaunchthealertwhenthealarmtriggers.

*

*@paramalarmAlarm.

*@paramatTimeInMillismillisecondssinceepoch

*/

privatestaticvoidenableAlert(Contextcontext,finalAlarmalarm,

finallongatTimeInMillis){

AlarmManageram=(AlarmManager)

                context.getSystemService(Context.ALARM_SERVICE);

 Intent intent = new Intent(ALARM_ALERT_ACTION);

PendingIntentsender=PendingIntent.getBroadcast(

                context, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT); //接受广播的闹钟的广播意图   Action:“ALARM_ALERT_ACTION”

        am.set(AlarmManager.RTC_WAKEUP, atTimeInMillis, sender);  //设置闹钟

/**

//闹钟的广播接受者

*Glueclass:connectsAlarmAlertIntentReceivertoAlarmAlert

*activity.PassesthroughAlarmID.

*/

public class AlarmReceiver extends BroadcastReceiver { 

.......

.....

.......

/*launchUI,explicitlystatingthatthisisnotduetouseraction

*sothatthecurrentapp'snotificationmanagementisnotdisturbed*/

IntentalarmAlert=newIntent(context,c);

alarmAlert.putExtra(Alarms.ALARM_INTENT_EXTRA,alarm);

alarmAlert.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK

|Intent.FLAG_ACTIVITY_NO_USER_ACTION);

        context.startActivity(alarmAlert);

...

........

//Playthealarmalertandvibratethedevice.

IntentplayAlarm=newIntent(Alarms.ALARM_ALERT_ACTION);

playAlarm.putExtra(Alarms.ALARM_INTENT_EXTRA,alarm);

        context.startService(playAlarm);

...........

.....

}

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