如何在android中使用报警管理器设置多个报警

Question

我正在构建一个警报应用程序。我已经成功实现了基本的报警功能。

Calendar calendar = Calendar.getInstance();
calendar.set(calendar.HOUR_OF_DAY, sHour);
calendar.set(calendar.MINUTE, sMin);
calendar.set(calendar.SECOND, 0);
calendar.set(calendar.MILLISECOND, 0);
long sdl = calendar.getTimeInMillis();

Intent intent = new Intent(AlarmList.this, AlarmReceiver.class);
PendingIntent sender = PendingIntent.getBroadcast(AlarmList.this, 0, intent,PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager ALARM1 = (AlarmManager)getSystemService(ALARM_SERVICE);
ALARM1.set(AlarmManager.RTC_WAKEUP, sdl, sender);

在我的应用程序中，用户可以选择天(sunday,monday...)每周重复警报。我正在尝试创建多个警报，每周重复一次，但不知道该怎么做。我可以使用（重复）间隔创建它还是应该创建多个警报管理器？

Answer 1

你需要使用different Broadcast id's作为pending intents。像这样的东西：

    Intent intent = new Intent(load.this, AlarmReceiver.class);
    final int _id = (int) System.currentTimeMillis();
    PendingIntent appIntent = PendingIntent.getBroadcast(this, _id, intent,PendingIntent.FLAG_ONE_SHOT);

使用系统时间应该是您触发的每个待处理目标的唯一标识符。

Answer 2

来自the docs：

如果已经安排了此Intent的警报（两个意图的相等性由filterEquals(Intent)定义，则它将被删除并替换为此

多个AlarmManagers无法解决您的问题。如果它们有多个不同的警报（不同的时间和不同的天数），那么每次启动先前的警报时，您都需要在BroadcastReceiver内设置警报。

您还需要持有RECEIVE_BOOT_COMPLETED并使用BroadcastReceiver来接收启动，这样如果手机重新启动，您可以重新安排警报。

Answer 3

要设置多个警报，您需要每次都定义Intent，以便与其他警报区分开来。我发现这样做的最简单方法是将data的Intent字段设置如下：

// give your alarm an id and save it somewhere
// in case you want to cancel it in future
String myAlarmId = ...;

// create your Intent
Intent intent = new Intent(AlarmList.this, AlarmReceiver.class);
intent.setData(Uri.parse("myalarms://" + myAlarmId));
...

你的其余代码@ Hassy31原样很好并保持不变。

请注意，根据文档，requestCode方法中的PendingIntent.getBroadcast()参数（由@parag建议）未使用，因此这不是正确的方法。

Answer 4

为pendingIntent设置广播id

for (int id = 0; id < 3; id++) {
        // Define pendingintent
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, id,ntent, 0); 
        // set() schedules an alarm 
        alarmManager.set(AlarmManager.RTC_WAKEUP, alertTime, pendingIntent);
}

Answer 5

使用android报警管理器设置多个报警

//RC_ARRAY is store all the code that generate when alarm is set 
private lateinit var RC_ARRAY:ArrayList<Int>
//tick is just hold the request when new alarm set
private var tick :Int=0

//setAlarm method set alarm
fun setAlarm(c: Calendar, context: Context) {
    val manager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager

//when alarm store set the request assign to tick variable
    tick = System.currentTimeMillis().toInt()
//Add all the alarm Request into RC_ARRAY for just cancel the alarm
    RC_ARRAY.add(tick)

//Notification Broadcast intent
    val intentAlarm = Intent(context, AlaramFireReceiver::class.java).let {
        PendingIntent.getBroadcast(context, tick, it, PendingIntent.FLAG_ONE_SHOT)
    }


//alarm fire next day if this condition is not statisfied 
    if (c.before(Calendar.getInstance())) {
        c.add(Calendar.DATE, 1)
    }
//set alarm
    manager.setExact(AlarmManager.RTC_WAKEUP, c.timeInMillis, intentAlarm)


}
//remove specific alarm
private fun removeAlarm(context: Context) {
    val manager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
    //remove specific alarm according to alarm request code
    for (i in RC_ARRAY){
        val intentAlarm = Intent(context, AlaramFireReceiver::class.java).let {
            PendingIntent.getBroadcast(context, i, it, 0)
        }
//cancel alarm
        manager.cancel(intentAlarm)
    }
}



//delivers notification for alarm
class AlaramFireReceiver : BroadcastReceiver() {

    override fun onReceive(context: Context, intent: Intent) {
//Notification ID
       val channelid="channelId"
        val manger=context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
//check for device only available for Oreo and above  
        if (Build.VERSION.SDK_INT >=Build.VERSION_CODES.O){
            val channel= NotificationChannel(channelid,"alarm notification",NotificationManager.IMPORTANCE_HIGH)
            channel.enableLights(true)
            manger.createNotificationChannel(channel)
        }
//build notification
        val build=NotificationCompat.Builder(context,channelid)
            .setSmallIcon(R.drawable.ic_access_time_black_24dp)
            .setContentTitle("alarm")
            .setContentTitle("time done")
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setColor(Color.RED)
//Deliver notification 
        manger.notify(0,build.build())
    }
}